AyeCode / invoicing

includes/admin/subscriptions.php

Indentation +81 added lines, -81 removed lines

@@ -8,23 +8,23 @@ 
  */
 function wpinv_subscriptions_page() {
 
-	if ( ! empty( $_GET['id'] ) ) {
+    if ( ! empty( $_GET['id'] ) ) {
 
         wpinv_recurring_subscription_details();
 
-		return;
+        return;
 
-	}
-	?>
+    }
+    ?>
 	<div class="wrap">
 
 		<h1>
 			<?php _e( 'Subscriptions', 'invoicing' ); ?>
 		</h1>
 		<?php
-		$subscribers_table = new WPInv_Subscription_Reports_Table();
-		$subscribers_table->prepare_items();
-		?>
+        $subscribers_table = new WPInv_Subscription_Reports_Table();
+        $subscribers_table->prepare_items();
+        ?>
 
 		<form id="subscribers-filter" method="get">
 
@@ -47,25 +47,25 @@ 
  */
 function wpinv_recurring_subscription_details() {
 
-	$render = true;
+    $render = true;
 
-	if ( ! current_user_can( 'manage_invoicing' ) ) {
-		die( __( 'You are not permitted to view this data.', 'invoicing' ) );
-	}
+    if ( ! current_user_can( 'manage_invoicing' ) ) {
+        die( __( 'You are not permitted to view this data.', 'invoicing' ) );
+    }
 
-	if ( ! isset( $_GET['id'] ) || ! is_numeric( $_GET['id'] ) ) {
+    if ( ! isset( $_GET['id'] ) || ! is_numeric( $_GET['id'] ) ) {
         die( __( 'Invalid subscription ID Provided.', 'invoicing' ) );
-	}
+    }
 
-	$sub_id  = (int) $_GET['id'];
-	$sub     = new WPInv_Subscription( $sub_id );
-	$parent  = new WPInv_Invoice( $sub->parent_payment_id );
+    $sub_id  = (int) $_GET['id'];
+    $sub     = new WPInv_Subscription( $sub_id );
+    $parent  = new WPInv_Invoice( $sub->parent_payment_id );
 
-	if ( empty( $sub ) ) {
-		die( __( 'Invalid subscription ID Provided.', 'invoicing' ) );
-	}
+    if ( empty( $sub ) ) {
+        die( __( 'Invalid subscription ID Provided.', 'invoicing' ) );
+    }
 
-	?>
+    ?>
 	<div class="wrap">
 		<h2><?php _e( 'Subscription Details', 'invoicing' ); ?></h2>
 
@@ -89,11 +89,11 @@ 
 										</td>
 										<td>
 											<?php
-											$frequency = WPInv_Subscriptions::wpinv_get_pretty_subscription_frequency( $sub->period, $sub->frequency );
-											$billing   = wpinv_price( wpinv_format_amount( $sub->recurring_amount ), $parent->get_currency() ) . ' / ' . $frequency;
-											$initial   = wpinv_price( wpinv_format_amount( $sub->initial_amount ), $parent->get_currency() );
-											printf( _x( '%s then %s', 'Initial subscription amount then billing cycle and amount', 'invoicing' ), $initial, $billing );
-											?>
+                                            $frequency = WPInv_Subscriptions::wpinv_get_pretty_subscription_frequency( $sub->period, $sub->frequency );
+                                            $billing   = wpinv_price( wpinv_format_amount( $sub->recurring_amount ), $parent->get_currency() ) . ' / ' . $frequency;
+                                            $initial   = wpinv_price( wpinv_format_amount( $sub->initial_amount ), $parent->get_currency() );
+                                            printf( _x( '%s then %s', 'Initial subscription amount then billing cycle and amount', 'invoicing' ), $initial, $billing );
+                                            ?>
 										</td>
 									</tr>
 									<tr>
@@ -135,9 +135,9 @@ 
 
                                             ?>
 											<a href="<?php echo esc_url( add_query_arg( array(
-													'post'   => $sub->product_id,
-													'action' => 'edit'
-												), admin_url( 'post.php' ) ) ); ?>" target="_blank"><?php _e( 'View Item', 'invoicing' ) ; ?></a>
+                                                    'post'   => $sub->product_id,
+                                                    'action' => 'edit'
+                                                ), admin_url( 'post.php' ) ) ); ?>" target="_blank"><?php _e( 'View Item', 'invoicing' ) ; ?></a>
 										</td>
 									</tr>
 									<tr>
@@ -300,56 +300,56 @@ 
  */
 function wpinv_recurring_process_subscription_update() {
 
-	if( empty( $_POST['sub_id'] ) ) {
-		return;
-	}
+    if( empty( $_POST['sub_id'] ) ) {
+        return;
+    }
 
-	if( empty( $_POST['wpinv_update_subscription'] ) ) {
-		return;
-	}
+    if( empty( $_POST['wpinv_update_subscription'] ) ) {
+        return;
+    }
 
-	if( ! current_user_can( 'manage_invoicing') ) {
-		return;
-	}
+    if( ! current_user_can( 'manage_invoicing') ) {
+        return;
+    }
 
-	if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
-		wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
-	}
+    if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
+        wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+    }
 
-	$profile_id      = sanitize_text_field( $_POST['profile_id'] );
-	$transaction_id  = sanitize_text_field( $_POST['transaction_id'] );
-	$product_id      = absint( $_POST['product_id'] );
-	$subscription    = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
-	$subscription->update( array(
-		'status'         => sanitize_text_field( $_POST['status'] ),
-		'profile_id'     => $profile_id,
-		'product_id'     => $product_id,
-		'transaction_id' => $transaction_id,
-	) );
+    $profile_id      = sanitize_text_field( $_POST['profile_id'] );
+    $transaction_id  = sanitize_text_field( $_POST['transaction_id'] );
+    $product_id      = absint( $_POST['product_id'] );
+    $subscription    = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
+    $subscription->update( array(
+        'status'         => sanitize_text_field( $_POST['status'] ),
+        'profile_id'     => $profile_id,
+        'product_id'     => $product_id,
+        'transaction_id' => $transaction_id,
+    ) );
 
-	$status = sanitize_text_field( $_POST['status'] );
+    $status = sanitize_text_field( $_POST['status'] );
 
-	switch( $status ) {
+    switch( $status ) {
 
-		case 'cancelled' :
+        case 'cancelled' :
 
-			$subscription->cancel();
-			break;
+            $subscription->cancel();
+            break;
 
-		case 'expired' :
+        case 'expired' :
 
-			$subscription->expire();
-			break;
+            $subscription->expire();
+            break;
 
-		case 'completed' :
+        case 'completed' :
 
-			$subscription->complete();
-			break;
+            $subscription->complete();
+            break;
 
-	}
+    }
 
-	wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=updated&id=' . $subscription->id ) );
-	exit;
+    wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=updated&id=' . $subscription->id ) );
+    exit;
 
 }
 add_action( 'admin_init', 'wpinv_recurring_process_subscription_update', 1 );
@@ -363,30 +363,30 @@ 
  */
 function wpinv_recurring_process_subscription_deletion() {
 
-	if( empty( $_POST['sub_id'] ) ) {
-		return;
-	}
+    if( empty( $_POST['sub_id'] ) ) {
+        return;
+    }
 
-	if( empty( $_POST['wpinv_delete_subscription'] ) ) {
-		return;
-	}
+    if( empty( $_POST['wpinv_delete_subscription'] ) ) {
+        return;
+    }
 
-	if( ! current_user_can( 'manage_invoicing') ) {
-		return;
-	}
+    if( ! current_user_can( 'manage_invoicing') ) {
+        return;
+    }
 
-	if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
-		wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
-	}
+    if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
+        wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+    }
 
-	$subscription = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
+    $subscription = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
 
-	delete_post_meta( $subscription->parent_payment_id, '_wpinv_subscription_payment' );
+    delete_post_meta( $subscription->parent_payment_id, '_wpinv_subscription_payment' );
 
-	$subscription->delete();
+    $subscription->delete();
 
-	wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=deleted' ) );
-	exit;
+    wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=deleted' ) );
+    exit;
 
 }
 add_action( 'admin_init', 'wpinv_recurring_process_subscription_deletion', 2 );

Spacing +113 added lines, -113 removed lines

@@ -8,7 +8,7 @@ 
  */
 function wpinv_subscriptions_page() {
 
-	if ( ! empty( $_GET['id'] ) ) {
+	if (!empty($_GET['id'])) {
 
         wpinv_recurring_subscription_details();
 
@@ -19,7 +19,7 @@ 
 	<div class="wrap">
 
 		<h1>
-			<?php _e( 'Subscriptions', 'invoicing' ); ?>
+			<?php _e('Subscriptions', 'invoicing'); ?>
 		</h1>
 		<?php
 		$subscribers_table = new WPInv_Subscription_Reports_Table();
@@ -31,7 +31,7 @@ 
 			<input type="hidden" name="post_type" value="download" />
 			<input type="hidden" name="page" value="wpinv-subscriptions" />
 			<?php $subscribers_table->views(); ?>
-			<?php $subscribers_table->search_box( __( 'Search', 'wpinvoicing' ), 'subscriptions' ); ?>
+			<?php $subscribers_table->search_box(__('Search', 'wpinvoicing'), 'subscriptions'); ?>
 			<?php $subscribers_table->display(); ?>
 
 		</form>
@@ -49,35 +49,35 @@ 
 
 	$render = true;
 
-	if ( ! current_user_can( 'manage_invoicing' ) ) {
-		die( __( 'You are not permitted to view this data.', 'invoicing' ) );
+	if (!current_user_can('manage_invoicing')) {
+		die(__('You are not permitted to view this data.', 'invoicing'));
 	}
 
-	if ( ! isset( $_GET['id'] ) || ! is_numeric( $_GET['id'] ) ) {
-        die( __( 'Invalid subscription ID Provided.', 'invoicing' ) );
+	if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
+        die(__('Invalid subscription ID Provided.', 'invoicing'));
 	}
 
 	$sub_id  = (int) $_GET['id'];
-	$sub     = new WPInv_Subscription( $sub_id );
-	$parent  = new WPInv_Invoice( $sub->parent_payment_id );
+	$sub     = new WPInv_Subscription($sub_id);
+	$parent  = new WPInv_Invoice($sub->parent_payment_id);
 
-	if ( empty( $sub ) ) {
-		die( __( 'Invalid subscription ID Provided.', 'invoicing' ) );
+	if (empty($sub)) {
+		die(__('Invalid subscription ID Provided.', 'invoicing'));
 	}
 
 	?>
 	<div class="wrap">
-		<h2><?php _e( 'Subscription Details', 'invoicing' ); ?></h2>
+		<h2><?php _e('Subscription Details', 'invoicing'); ?></h2>
 
-		<?php if ( $sub ) : ?>
+		<?php if ($sub) : ?>
 
 			<div id="wpinv-item-card-wrapper">
 
-				<?php do_action( 'wpinv_subscription_card_top', $sub ); ?>
+				<?php do_action('wpinv_subscription_card_top', $sub); ?>
 
 				<div class="info-wrapper item-section">
 
-					<form id="edit-item-info" method="post" action="<?php echo admin_url( 'admin.php?page=wpinv-subscriptions&id=' . $sub->id ); ?>">
+					<form id="edit-item-info" method="post" action="<?php echo admin_url('admin.php?page=wpinv-subscriptions&id=' . $sub->id); ?>">
 
 						<div class="item-info">
 
@@ -85,124 +85,124 @@ 
 								<tbody>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Billing Cycle:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Billing Cycle:', 'invoicing'); ?></label>
 										</td>
 										<td>
 											<?php
-											$frequency = WPInv_Subscriptions::wpinv_get_pretty_subscription_frequency( $sub->period, $sub->frequency );
-											$billing   = wpinv_price( wpinv_format_amount( $sub->recurring_amount ), $parent->get_currency() ) . ' / ' . $frequency;
-											$initial   = wpinv_price( wpinv_format_amount( $sub->initial_amount ), $parent->get_currency() );
-											printf( _x( '%s then %s', 'Initial subscription amount then billing cycle and amount', 'invoicing' ), $initial, $billing );
+											$frequency = WPInv_Subscriptions::wpinv_get_pretty_subscription_frequency($sub->period, $sub->frequency);
+											$billing   = wpinv_price(wpinv_format_amount($sub->recurring_amount), $parent->get_currency()) . ' / ' . $frequency;
+											$initial   = wpinv_price(wpinv_format_amount($sub->initial_amount), $parent->get_currency());
+											printf(_x('%s then %s', 'Initial subscription amount then billing cycle and amount', 'invoicing'), $initial, $billing);
 											?>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Times Billed:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Times Billed:', 'invoicing'); ?></label>
 										</td>
-										<td><?php echo $sub->get_times_billed() . ' / ' . ( ( $sub->bill_times == 0 ) ? __( 'Until Cancelled', 'invoicing' ) : $sub->bill_times ); ?></td>
+										<td><?php echo $sub->get_times_billed() . ' / ' . (($sub->bill_times == 0) ? __('Until Cancelled', 'invoicing') : $sub->bill_times); ?></td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Customer:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Customer:', 'invoicing'); ?></label>
 										</td>
 										<td>
-											<?php $subscriber = get_userdata( $sub->customer_id ); ?>
-											<a href="<?php echo esc_url( get_edit_user_link( $sub->customer_id ) ); ?>" target="_blank"><?php echo ! empty( $subscriber->display_name ) ? $subscriber->display_name : $subscriber->user_email; ?></a>
+											<?php $subscriber = get_userdata($sub->customer_id); ?>
+											<a href="<?php echo esc_url(get_edit_user_link($sub->customer_id)); ?>" target="_blank"><?php echo !empty($subscriber->display_name) ? $subscriber->display_name : $subscriber->user_email; ?></a>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Initial Invoice:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Initial Invoice:', 'invoicing'); ?></label>
 										</td>
 										<td>
-                                            <a target="_blank" title="<?php _e( 'View invoice', 'invoicing' ); ?>" href="<?php echo esc_url( get_permalink( $sub->parent_payment_id ) ); ?>"><?php echo wpinv_clean( $parent->get_number() ); ?></a>&nbsp;&nbsp;&nbsp;<?php echo wp_sprintf( __( '( ID: %s )', 'invoicing' ), '<a title="' . esc_attr( __( 'View invoice details', 'invoicing' ) ) . '" href="' . esc_html( get_edit_post_link( $sub->parent_payment_id ) ) . '" target="_blank">' . wpinv_clean( $sub->parent_payment_id ) . '</a>' ); ?></td>
+                                            <a target="_blank" title="<?php _e('View invoice', 'invoicing'); ?>" href="<?php echo esc_url(get_permalink($sub->parent_payment_id)); ?>"><?php echo wpinv_clean($parent->get_number()); ?></a>&nbsp;&nbsp;&nbsp;<?php echo wp_sprintf(__('( ID: %s )', 'invoicing'), '<a title="' . esc_attr(__('View invoice details', 'invoicing')) . '" href="' . esc_html(get_edit_post_link($sub->parent_payment_id)) . '" target="_blank">' . wpinv_clean($sub->parent_payment_id) . '</a>'); ?></td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Item:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Item:', 'invoicing'); ?></label>
 										</td>
 										<td>
 											<?php
-                                            echo wpinv_item_dropdown( array(
+                                            echo wpinv_item_dropdown(array(
                                                 'name'              => 'product_id',
                                                 'id'                => 'wpinv_invoice_item',
                                                 'with_packages'     => false,
                                                 'show_recurring'    => true,
                                                 'selected'          => $sub->product_id,
                                                 'class'             => 'wpinv-sub-product-id wpi_select2',
-                                            ) );
+                                            ));
 
                                             ?>
-											<a href="<?php echo esc_url( add_query_arg( array(
+											<a href="<?php echo esc_url(add_query_arg(array(
 													'post'   => $sub->product_id,
 													'action' => 'edit'
-												), admin_url( 'post.php' ) ) ); ?>" target="_blank"><?php _e( 'View Item', 'invoicing' ) ; ?></a>
+												), admin_url('post.php'))); ?>" target="_blank"><?php _e('View Item', 'invoicing'); ?></a>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Payment Method:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Payment Method:', 'invoicing'); ?></label>
 										</td>
-										<td><?php echo wpinv_get_gateway_admin_label( $parent->get_gateway() ); ?></td>
+										<td><?php echo wpinv_get_gateway_admin_label($parent->get_gateway()); ?></td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Profile ID:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Profile ID:', 'invoicing'); ?></label>
 										</td>
 										<td>
 											<span class="wpinv-sub-profile-id">
-												<?php echo apply_filters( 'wpinv_subscription_profile_link_' . $sub->gateway, $sub->profile_id, $sub ); ?>
+												<?php echo apply_filters('wpinv_subscription_profile_link_' . $sub->gateway, $sub->profile_id, $sub); ?>
 											</span>
-											<input type="text" name="profile_id" class="hidden wpinv-sub-profile-id" value="<?php echo esc_attr( $sub->profile_id ); ?>" />
+											<input type="text" name="profile_id" class="hidden wpinv-sub-profile-id" value="<?php echo esc_attr($sub->profile_id); ?>" />
 											<span>&nbsp;&ndash;&nbsp;</span>
-											<a href="#" class="wpinv-edit-sub-profile-id"><?php _e( 'Edit', 'invoicing' ); ?></a>
+											<a href="#" class="wpinv-edit-sub-profile-id"><?php _e('Edit', 'invoicing'); ?></a>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Transaction ID:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Transaction ID:', 'invoicing'); ?></label>
 										</td>
 										<td>
-											<span class="wpinv-sub-transaction-id"><?php echo apply_filters( 'wpinv_subscription_transaction_link_' . $sub->gateway, $sub->get_transaction_id(), $sub ); ?></span>
-											<input type="text" name="transaction_id" class="hidden wpinv-sub-transaction-id" value="<?php echo esc_attr( $sub->get_transaction_id() ); ?>" />
+											<span class="wpinv-sub-transaction-id"><?php echo apply_filters('wpinv_subscription_transaction_link_' . $sub->gateway, $sub->get_transaction_id(), $sub); ?></span>
+											<input type="text" name="transaction_id" class="hidden wpinv-sub-transaction-id" value="<?php echo esc_attr($sub->get_transaction_id()); ?>" />
 											<span>&nbsp;&ndash;&nbsp;</span>
-											<a href="#" class="wpinv-edit-sub-transaction-id"><?php _e( 'Edit', 'invoicing' ); ?></a>
+											<a href="#" class="wpinv-edit-sub-transaction-id"><?php _e('Edit', 'invoicing'); ?></a>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Date Created:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Date Created:', 'invoicing'); ?></label>
 										</td>
-										<td><?php echo date_i18n( get_option( 'date_format' ), strtotime( $sub->created, current_time( 'timestamp' ) ) ); ?></td>
+										<td><?php echo date_i18n(get_option('date_format'), strtotime($sub->created, current_time('timestamp'))); ?></td>
 									</tr>
 									<tr>
 										<td class="row-title">
 											<label for="tablecell">
-												<?php if( 'trialling' == $sub->status ) : ?>
-													<?php _e( 'Trialling Until:', 'invoicing' ); ?>
+												<?php if ('trialling' == $sub->status) : ?>
+													<?php _e('Trialling Until:', 'invoicing'); ?>
 												<?php else: ?>
-													<?php _e( 'Expiration Date:', 'invoicing' ); ?>
+													<?php _e('Expiration Date:', 'invoicing'); ?>
 												<?php endif; ?>
 											</label>
 										</td>
 										<td>
-											<span class="wpinv-sub-expiration"><?php echo date_i18n( get_option( 'date_format' ), strtotime( $sub->expiration, current_time( 'timestamp' ) ) ); ?></span>
+											<span class="wpinv-sub-expiration"><?php echo date_i18n(get_option('date_format'), strtotime($sub->expiration, current_time('timestamp'))); ?></span>
 										</td>
 									</tr>
 									<tr>
 										<td class="row-title">
-											<label for="tablecell"><?php _e( 'Subscription Status:', 'invoicing' ); ?></label>
+											<label for="tablecell"><?php _e('Subscription Status:', 'invoicing'); ?></label>
 										</td>
 										<td>
 											<select name="status" class="wpi_select2">
-												<option value="pending"<?php selected( 'pending', $sub->status ); ?>><?php _e( 'Pending', 'invoicing' ); ?></option>
-												<option value="active"<?php selected( 'active', $sub->status ); ?>><?php _e( 'Active', 'invoicing' ); ?></option>
-												<option value="cancelled"<?php selected( 'cancelled', $sub->status ); ?>><?php _e( 'Cancelled', 'invoicing' ); ?></option>
-												<option value="expired"<?php selected( 'expired', $sub->status ); ?>><?php _e( 'Expired', 'invoicing' ); ?></option>
-												<option value="trialling"<?php selected( 'trialling', $sub->status ); ?>><?php _e( 'Trialling', 'invoicing' ); ?></option>
-												<option value="failing"<?php selected( 'failing', $sub->status ); ?>><?php _e( 'Failing', 'invoicing' ); ?></option>
-												<option value="completed"<?php selected( 'completed', $sub->status ); ?>><?php _e( 'Completed', 'invoicing' ); ?></option>
+												<option value="pending"<?php selected('pending', $sub->status); ?>><?php _e('Pending', 'invoicing'); ?></option>
+												<option value="active"<?php selected('active', $sub->status); ?>><?php _e('Active', 'invoicing'); ?></option>
+												<option value="cancelled"<?php selected('cancelled', $sub->status); ?>><?php _e('Cancelled', 'invoicing'); ?></option>
+												<option value="expired"<?php selected('expired', $sub->status); ?>><?php _e('Expired', 'invoicing'); ?></option>
+												<option value="trialling"<?php selected('trialling', $sub->status); ?>><?php _e('Trialling', 'invoicing'); ?></option>
+												<option value="failing"<?php selected('failing', $sub->status); ?>><?php _e('Failing', 'invoicing'); ?></option>
+												<option value="completed"<?php selected('completed', $sub->status); ?>><?php _e('Completed', 'invoicing'); ?></option>
 											</select>
 										</td>
 									</tr>
@@ -210,79 +210,79 @@ 
 							</table>
 						</div>
 						<div id="wpinv-sub-notices">
-							<div class="notice notice-info inline hidden" id="wpinv-sub-product-update-notice"><p><?php _e( 'Changing the product assigned will not automatically adjust any pricing.', 'invoicing' ); ?></p></div>
-							<div class="notice notice-warning inline hidden" id="wpinv-sub-profile-id-update-notice"><p><?php _e( 'Changing the profile ID can result in renewals not being processed. Do this with caution.', 'invoicing' ); ?></p></div>
+							<div class="notice notice-info inline hidden" id="wpinv-sub-product-update-notice"><p><?php _e('Changing the product assigned will not automatically adjust any pricing.', 'invoicing'); ?></p></div>
+							<div class="notice notice-warning inline hidden" id="wpinv-sub-profile-id-update-notice"><p><?php _e('Changing the profile ID can result in renewals not being processed. Do this with caution.', 'invoicing'); ?></p></div>
 						</div>
 						<div id="item-edit-actions" class="edit-item" style="float:right; margin: 10px 0 0; display: block;">
-							<?php wp_nonce_field( 'wpinv-recurring-update', 'wpinv-recurring-update-nonce', false, true ); ?>
-							<input type="submit" name="wpinv_update_subscription" id="wpinv_update_subscription" class="button button-primary" value="<?php _e( 'Update Subscription', 'invoicing' ); ?>"/>
-							<input type="hidden" name="sub_id" value="<?php echo absint( $sub->id ); ?>" />
-							<?php if( $sub->can_cancel() ) : ?>
-								<a class="button button-primary" href="<?php echo $sub->get_cancel_url(); ?>" ><?php _e( 'Cancel Subscription', 'invoicing' ); ?></a>
+							<?php wp_nonce_field('wpinv-recurring-update', 'wpinv-recurring-update-nonce', false, true); ?>
+							<input type="submit" name="wpinv_update_subscription" id="wpinv_update_subscription" class="button button-primary" value="<?php _e('Update Subscription', 'invoicing'); ?>"/>
+							<input type="hidden" name="sub_id" value="<?php echo absint($sub->id); ?>" />
+							<?php if ($sub->can_cancel()) : ?>
+								<a class="button button-primary" href="<?php echo $sub->get_cancel_url(); ?>" ><?php _e('Cancel Subscription', 'invoicing'); ?></a>
 							<?php endif; ?>
-							&nbsp;<input type="submit" name="wpinv_delete_subscription" class="wpinv-delete-subscription button" value="<?php _e( 'Delete Subscription', 'invoicing' ); ?>"/>
+							&nbsp;<input type="submit" name="wpinv_delete_subscription" class="wpinv-delete-subscription button" value="<?php _e('Delete Subscription', 'invoicing'); ?>"/>
 						</div>
 
 					</form>
 				</div>
 
-				<?php do_action( 'wpinv_subscription_before_stats', $sub ); ?>
+				<?php do_action('wpinv_subscription_before_stats', $sub); ?>
 
-				<?php do_action( 'wpinv_subscription_before_tables_wrapper', $sub ); ?>
+				<?php do_action('wpinv_subscription_before_tables_wrapper', $sub); ?>
 
 				<div id="item-tables-wrapper" class="item-section">
 
-					<?php do_action( 'wpinv_subscription_before_tables', $sub ); ?>
+					<?php do_action('wpinv_subscription_before_tables', $sub); ?>
 
-					<h3><?php _e( 'Renewal Payments:', 'invoicing' ); ?></h3>
+					<h3><?php _e('Renewal Payments:', 'invoicing'); ?></h3>
 					<?php $payments = $sub->get_child_payments(); ?>
-					<?php if ( 'manual' == $sub->gateway ) : ?>
-						<p><strong><?php _e( 'Note:', 'invoicing' ); ?></strong> <?php _e( 'Subscriptions purchased with the Test Payment gateway will not renew automatically.', 'invoicing' ); ?></p>
+					<?php if ('manual' == $sub->gateway) : ?>
+						<p><strong><?php _e('Note:', 'invoicing'); ?></strong> <?php _e('Subscriptions purchased with the Test Payment gateway will not renew automatically.', 'invoicing'); ?></p>
 					<?php endif; ?>
 					<table class="wp-list-table widefat striped payments">
 						<thead>
 						<tr>
-							<th><?php _e( 'ID', 'invoicing' ); ?></th>
-							<th><?php _e( 'Amount', 'invoicing' ); ?></th>
-							<th><?php _e( 'Date', 'invoicing' ); ?></th>
-							<th><?php _e( 'Status', 'invoicing' ); ?></th>
-                            <th><?php _e( 'Invoice', 'invoicing' ); ?></th>
-							<th class="column-wpi_actions"><?php _e( 'Actions', 'invoicing' ); ?></th>
+							<th><?php _e('ID', 'invoicing'); ?></th>
+							<th><?php _e('Amount', 'invoicing'); ?></th>
+							<th><?php _e('Date', 'invoicing'); ?></th>
+							<th><?php _e('Status', 'invoicing'); ?></th>
+                            <th><?php _e('Invoice', 'invoicing'); ?></th>
+							<th class="column-wpi_actions"><?php _e('Actions', 'invoicing'); ?></th>
 						</tr>
 						</thead>
 						<tbody>
-						<?php if ( ! empty( $payments ) ) : ?>
-							<?php foreach ( $payments as $payment ) : $invoice = wpinv_get_invoice( $payment->ID ); if ( empty( $invoice->ID ) ) continue; ?>
+						<?php if (!empty($payments)) : ?>
+							<?php foreach ($payments as $payment) : $invoice = wpinv_get_invoice($payment->ID); if (empty($invoice->ID)) continue; ?>
 								<tr>
 									<td><?php echo $payment->ID; ?></td>
-									<td><?php echo wpinv_price( $invoice->get_total(), $invoice->get_currency() ); ?></td>
-									<td><?php echo wpinv_clean( $invoice->get_date_created() ); ?></td>
-									<td><?php echo wpinv_clean( $invoice->get_status_nicename() ); ?></td>
+									<td><?php echo wpinv_price($invoice->get_total(), $invoice->get_currency()); ?></td>
+									<td><?php echo wpinv_clean($invoice->get_date_created()); ?></td>
+									<td><?php echo wpinv_clean($invoice->get_status_nicename()); ?></td>
 									<td>
-										<a target="_blank" title="<?php _e( 'View invoice', 'invoicing' ); ?>" href="<?php echo esc_url( get_permalink( $payment->ID ) ); ?>"><?php echo $invoice->get_number(); ?></a>
-										<?php do_action( 'wpinv_subscription_payments_actions', $sub, $payment ); ?>
+										<a target="_blank" title="<?php _e('View invoice', 'invoicing'); ?>" href="<?php echo esc_url(get_permalink($payment->ID)); ?>"><?php echo $invoice->get_number(); ?></a>
+										<?php do_action('wpinv_subscription_payments_actions', $sub, $payment); ?>
 									</td>
 									<td class="column-wpi_actions">
-										<a title="<?php echo esc_attr( wp_sprintf( __( 'View details for invoice: %s', 'invoicing' ), $invoice->get_number() ) ); ?>" href="<?php echo get_edit_post_link( $payment->ID ); ?>"><?php _e( 'View Details', 'invoicing' ); ?>
+										<a title="<?php echo esc_attr(wp_sprintf(__('View details for invoice: %s', 'invoicing'), $invoice->get_number())); ?>" href="<?php echo get_edit_post_link($payment->ID); ?>"><?php _e('View Details', 'invoicing'); ?>
 										</a>
-										<?php do_action( 'wpinv_subscription_payments_actions', $sub, $payment ); ?>
+										<?php do_action('wpinv_subscription_payments_actions', $sub, $payment); ?>
 									</td>
 								</tr>
 							<?php endforeach; ?>
 						<?php else: ?>
 							<tr>
-								<td colspan="5"><?php _e( 'No Invoices Found.', 'invoicing' ); ?></td>
+								<td colspan="5"><?php _e('No Invoices Found.', 'invoicing'); ?></td>
 							</tr>
 						<?php endif; ?>
 						</tbody>
 						<tfoot></tfoot>
 					</table>
 
-					<?php do_action( 'wpinv_subscription_after_tables', $sub ); ?>
+					<?php do_action('wpinv_subscription_after_tables', $sub); ?>
 
 				</div>
 
-				<?php do_action( 'wpinv_subscription_card_bottom', $sub ); ?>
+				<?php do_action('wpinv_subscription_card_bottom', $sub); ?>
 			</div>
 
 		<?php endif; ?>
@@ -300,36 +300,36 @@ 
  */
 function wpinv_recurring_process_subscription_update() {
 
-	if( empty( $_POST['sub_id'] ) ) {
+	if (empty($_POST['sub_id'])) {
 		return;
 	}
 
-	if( empty( $_POST['wpinv_update_subscription'] ) ) {
+	if (empty($_POST['wpinv_update_subscription'])) {
 		return;
 	}
 
-	if( ! current_user_can( 'manage_invoicing') ) {
+	if (!current_user_can('manage_invoicing')) {
 		return;
 	}
 
-	if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
-		wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+	if (!wp_verify_nonce($_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update')) {
+		wp_die(__('Nonce verification failed', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
 	}
 
-	$profile_id      = sanitize_text_field( $_POST['profile_id'] );
-	$transaction_id  = sanitize_text_field( $_POST['transaction_id'] );
-	$product_id      = absint( $_POST['product_id'] );
-	$subscription    = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
-	$subscription->update( array(
-		'status'         => sanitize_text_field( $_POST['status'] ),
+	$profile_id      = sanitize_text_field($_POST['profile_id']);
+	$transaction_id  = sanitize_text_field($_POST['transaction_id']);
+	$product_id      = absint($_POST['product_id']);
+	$subscription    = new WPInv_Subscription(absint($_POST['sub_id']));
+	$subscription->update(array(
+		'status'         => sanitize_text_field($_POST['status']),
 		'profile_id'     => $profile_id,
 		'product_id'     => $product_id,
 		'transaction_id' => $transaction_id,
-	) );
+	));
 
-	$status = sanitize_text_field( $_POST['status'] );
+	$status = sanitize_text_field($_POST['status']);
 
-	switch( $status ) {
+	switch ($status) {
 
 		case 'cancelled' :
 
@@ -348,11 +348,11 @@ 
 
 	}
 
-	wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=updated&id=' . $subscription->id ) );
+	wp_redirect(admin_url('admin.php?page=wpinv-subscriptions&wpinv-message=updated&id=' . $subscription->id));
 	exit;
 
 }
-add_action( 'admin_init', 'wpinv_recurring_process_subscription_update', 1 );
+add_action('admin_init', 'wpinv_recurring_process_subscription_update', 1);
 
 /**
  * Handles subscription deletion
@@ -363,30 +363,30 @@ 
  */
 function wpinv_recurring_process_subscription_deletion() {
 
-	if( empty( $_POST['sub_id'] ) ) {
+	if (empty($_POST['sub_id'])) {
 		return;
 	}
 
-	if( empty( $_POST['wpinv_delete_subscription'] ) ) {
+	if (empty($_POST['wpinv_delete_subscription'])) {
 		return;
 	}
 
-	if( ! current_user_can( 'manage_invoicing') ) {
+	if (!current_user_can('manage_invoicing')) {
 		return;
 	}
 
-	if( ! wp_verify_nonce( $_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update' ) ) {
-		wp_die( __( 'Nonce verification failed', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+	if (!wp_verify_nonce($_POST['wpinv-recurring-update-nonce'], 'wpinv-recurring-update')) {
+		wp_die(__('Nonce verification failed', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
 	}
 
-	$subscription = new WPInv_Subscription( absint( $_POST['sub_id'] ) );
+	$subscription = new WPInv_Subscription(absint($_POST['sub_id']));
 
-	delete_post_meta( $subscription->parent_payment_id, '_wpinv_subscription_payment' );
+	delete_post_meta($subscription->parent_payment_id, '_wpinv_subscription_payment');
 
 	$subscription->delete();
 
-	wp_redirect( admin_url( 'admin.php?page=wpinv-subscriptions&wpinv-message=deleted' ) );
+	wp_redirect(admin_url('admin.php?page=wpinv-subscriptions&wpinv-message=deleted'));
 	exit;
 
 }
-add_action( 'admin_init', 'wpinv_recurring_process_subscription_deletion', 2 );
+add_action('admin_init', 'wpinv_recurring_process_subscription_deletion', 2);

Braces +14 added lines, -5 removed lines

@@ -181,8 +181,11 @@ 
 											<label for="tablecell">
 												<?php if( 'trialling' == $sub->status ) : ?>
 													<?php _e( 'Trialling Until:', 'invoicing' ); ?>
-												<?php else: ?>
-													<?php _e( 'Expiration Date:', 'invoicing' ); ?>
+												<?php else {
+    : ?>
+													<?php _e( 'Expiration Date:', 'invoicing' );
+}
+?>
 												<?php endif; ?>
 											</label>
 										</td>
@@ -252,7 +255,10 @@ 
 						</thead>
 						<tbody>
 						<?php if ( ! empty( $payments ) ) : ?>
-							<?php foreach ( $payments as $payment ) : $invoice = wpinv_get_invoice( $payment->ID ); if ( empty( $invoice->ID ) ) continue; ?>
+							<?php foreach ( $payments as $payment ) : $invoice = wpinv_get_invoice( $payment->ID ); if ( empty( $invoice->ID ) ) {
+    continue;
+}
+?>
 								<tr>
 									<td><?php echo $payment->ID; ?></td>
 									<td><?php echo wpinv_price( $invoice->get_total(), $invoice->get_currency() ); ?></td>
@@ -269,9 +275,12 @@ 
 									</td>
 								</tr>
 							<?php endforeach; ?>
-						<?php else: ?>
+						<?php else {
+    : ?>
 							<tr>
-								<td colspan="5"><?php _e( 'No Invoices Found.', 'invoicing' ); ?></td>
+								<td colspan="5"><?php _e( 'No Invoices Found.', 'invoicing' );
+}
+?></td>
 							</tr>
 						<?php endif; ?>
 						</tbody>

includes/class-wpinv-ajax.php

Indentation +58 added lines, -58 removed lines

@@ -14,70 +14,70 @@ 
 class WPInv_Ajax {
 
     /**
-	 * Hook in ajax handlers.
-	 */
-	public static function init() {
-		add_action( 'init', array( __CLASS__, 'define_ajax' ), 0 );
-		add_action( 'template_redirect', array( __CLASS__, 'do_wpinv_ajax' ), 0 );
-		self::add_ajax_events();
+     * Hook in ajax handlers.
+     */
+    public static function init() {
+        add_action( 'init', array( __CLASS__, 'define_ajax' ), 0 );
+        add_action( 'template_redirect', array( __CLASS__, 'do_wpinv_ajax' ), 0 );
+        self::add_ajax_events();
     }
 
     /**
-	 * Set GetPaid AJAX constant and headers.
-	 */
-	public static function define_ajax() {
-
-		if ( ! empty( $_GET['wpinv-ajax'] ) ) {
-			getpaid_maybe_define_constant( 'DOING_AJAX', true );
-			getpaid_maybe_define_constant( 'WPInv_DOING_AJAX', true );
-			if ( ! WP_DEBUG || ( WP_DEBUG && ! WP_DEBUG_DISPLAY ) ) {
-				/** @scrutinizer ignore-unhandled */ @ini_set( 'display_errors', 0 );
-			}
-			$GLOBALS['wpdb']->hide_errors();
-		}
+     * Set GetPaid AJAX constant and headers.
+     */
+    public static function define_ajax() {
+
+        if ( ! empty( $_GET['wpinv-ajax'] ) ) {
+            getpaid_maybe_define_constant( 'DOING_AJAX', true );
+            getpaid_maybe_define_constant( 'WPInv_DOING_AJAX', true );
+            if ( ! WP_DEBUG || ( WP_DEBUG && ! WP_DEBUG_DISPLAY ) ) {
+                /** @scrutinizer ignore-unhandled */ @ini_set( 'display_errors', 0 );
+            }
+            $GLOBALS['wpdb']->hide_errors();
+        }
 
     }
     
     /**
-	 * Send headers for GetPaid Ajax Requests.
-	 *
-	 * @since 1.0.18
-	 */
-	private static function wpinv_ajax_headers() {
-		if ( ! headers_sent() ) {
-			send_origin_headers();
-			send_nosniff_header();
-			nocache_headers();
-			header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
-			header( 'X-Robots-Tag: noindex' );
-			status_header( 200 );
-		}
+     * Send headers for GetPaid Ajax Requests.
+     *
+     * @since 1.0.18
+     */
+    private static function wpinv_ajax_headers() {
+        if ( ! headers_sent() ) {
+            send_origin_headers();
+            send_nosniff_header();
+            nocache_headers();
+            header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
+            header( 'X-Robots-Tag: noindex' );
+            status_header( 200 );
+        }
     }
     
     /**
-	 * Check for GetPaid Ajax request and fire action.
-	 */
-	public static function do_wpinv_ajax() {
-		global $wp_query;
+     * Check for GetPaid Ajax request and fire action.
+     */
+    public static function do_wpinv_ajax() {
+        global $wp_query;
 
-		if ( ! empty( $_GET['wpinv-ajax'] ) ) {
-			$wp_query->set( 'wpinv-ajax', sanitize_text_field( wp_unslash( $_GET['wpinv-ajax'] ) ) );
-		}
+        if ( ! empty( $_GET['wpinv-ajax'] ) ) {
+            $wp_query->set( 'wpinv-ajax', sanitize_text_field( wp_unslash( $_GET['wpinv-ajax'] ) ) );
+        }
 
-		$action = $wp_query->get( 'wpinv-ajax' );
+        $action = $wp_query->get( 'wpinv-ajax' );
 
-		if ( $action ) {
-			self::wpinv_ajax_headers();
-			$action = sanitize_text_field( $action );
-			do_action( 'wpinv_ajax_' . $action );
-			wp_die();
-		}
+        if ( $action ) {
+            self::wpinv_ajax_headers();
+            $action = sanitize_text_field( $action );
+            do_action( 'wpinv_ajax_' . $action );
+            wp_die();
+        }
 
     }
 
     /**
-	 * Hook in ajax methods.
-	 */
+     * Hook in ajax methods.
+     */
     public static function add_ajax_events() {
 
         // array( 'event' => is_frontend )
@@ -260,24 +260,24 @@ 
         }
 
         // Is the request set up correctly?
-		if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
-			echo aui()->alert(
-				array(
-					'type'    => 'warning',
-					'content' => __( 'No payment form or item provided', 'invoicing' ),
-				)
+        if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
+            echo aui()->alert(
+                array(
+                    'type'    => 'warning',
+                    'content' => __( 'No payment form or item provided', 'invoicing' ),
+                )
             );
             exit;
         }
 
         // Payment form or button?
-		if ( ! empty( $_GET['form'] ) ) {
+        if ( ! empty( $_GET['form'] ) ) {
             getpaid_display_payment_form( $_GET['form'] );
-		} else if( $_GET['invoice'] ) {
-		    echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
+        } else if( $_GET['invoice'] ) {
+            echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
         } else {
-			$items = getpaid_convert_items_to_array( $_GET['item'] );
-		    getpaid_display_item_payment_form( $items );
+            $items = getpaid_convert_items_to_array( $_GET['item'] );
+            getpaid_display_item_payment_form( $items );
         }
 
         exit;

Spacing +318 added lines, -318 removed lines

@@ -6,7 +6,7 @@ 
  * @package Invoicing
  */
  
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * WPInv_Ajax class.
@@ -17,8 +17,8 @@ 
 	 * Hook in ajax handlers.
 	 */
 	public static function init() {
-		add_action( 'init', array( __CLASS__, 'define_ajax' ), 0 );
-		add_action( 'template_redirect', array( __CLASS__, 'do_wpinv_ajax' ), 0 );
+		add_action('init', array(__CLASS__, 'define_ajax'), 0);
+		add_action('template_redirect', array(__CLASS__, 'do_wpinv_ajax'), 0);
 		self::add_ajax_events();
     }
 
@@ -27,11 +27,11 @@ 
 	 */
 	public static function define_ajax() {
 
-		if ( ! empty( $_GET['wpinv-ajax'] ) ) {
-			getpaid_maybe_define_constant( 'DOING_AJAX', true );
-			getpaid_maybe_define_constant( 'WPInv_DOING_AJAX', true );
-			if ( ! WP_DEBUG || ( WP_DEBUG && ! WP_DEBUG_DISPLAY ) ) {
-				/** @scrutinizer ignore-unhandled */ @ini_set( 'display_errors', 0 );
+		if (!empty($_GET['wpinv-ajax'])) {
+			getpaid_maybe_define_constant('DOING_AJAX', true);
+			getpaid_maybe_define_constant('WPInv_DOING_AJAX', true);
+			if (!WP_DEBUG || (WP_DEBUG && !WP_DEBUG_DISPLAY)) {
+				/** @scrutinizer ignore-unhandled */ @ini_set('display_errors', 0);
 			}
 			$GLOBALS['wpdb']->hide_errors();
 		}
@@ -44,13 +44,13 @@ 
 	 * @since 1.0.18
 	 */
 	private static function wpinv_ajax_headers() {
-		if ( ! headers_sent() ) {
+		if (!headers_sent()) {
 			send_origin_headers();
 			send_nosniff_header();
 			nocache_headers();
-			header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
-			header( 'X-Robots-Tag: noindex' );
-			status_header( 200 );
+			header('Content-Type: text/html; charset=' . get_option('blog_charset'));
+			header('X-Robots-Tag: noindex');
+			status_header(200);
 		}
     }
     
@@ -60,16 +60,16 @@ 
 	public static function do_wpinv_ajax() {
 		global $wp_query;
 
-		if ( ! empty( $_GET['wpinv-ajax'] ) ) {
-			$wp_query->set( 'wpinv-ajax', sanitize_text_field( wp_unslash( $_GET['wpinv-ajax'] ) ) );
+		if (!empty($_GET['wpinv-ajax'])) {
+			$wp_query->set('wpinv-ajax', sanitize_text_field(wp_unslash($_GET['wpinv-ajax'])));
 		}
 
-		$action = $wp_query->get( 'wpinv-ajax' );
+		$action = $wp_query->get('wpinv-ajax');
 
-		if ( $action ) {
+		if ($action) {
 			self::wpinv_ajax_headers();
-			$action = sanitize_text_field( $action );
-			do_action( 'wpinv_ajax_' . $action );
+			$action = sanitize_text_field($action);
+			do_action('wpinv_ajax_' . $action);
 			wp_die();
 		}
 
@@ -103,36 +103,36 @@ 
             'ip_geolocation'              => true,
         );
 
-        foreach ( $ajax_events as $ajax_event => $nopriv ) {
-            add_action( 'wp_ajax_wpinv_' . $ajax_event, array( __CLASS__, $ajax_event ) );
-            add_action( 'wp_ajax_getpaid_' . $ajax_event, array( __CLASS__, $ajax_event ) );
+        foreach ($ajax_events as $ajax_event => $nopriv) {
+            add_action('wp_ajax_wpinv_' . $ajax_event, array(__CLASS__, $ajax_event));
+            add_action('wp_ajax_getpaid_' . $ajax_event, array(__CLASS__, $ajax_event));
 
-            if ( $nopriv ) {
-                add_action( 'wp_ajax_nopriv_wpinv_' . $ajax_event, array( __CLASS__, $ajax_event ) );
-                add_action( 'wp_ajax_nopriv_getpaid_' . $ajax_event, array( __CLASS__, $ajax_event ) );
-                add_action( 'wpinv_ajax_' . $ajax_event, array( __CLASS__, $ajax_event ) );
+            if ($nopriv) {
+                add_action('wp_ajax_nopriv_wpinv_' . $ajax_event, array(__CLASS__, $ajax_event));
+                add_action('wp_ajax_nopriv_getpaid_' . $ajax_event, array(__CLASS__, $ajax_event));
+                add_action('wpinv_ajax_' . $ajax_event, array(__CLASS__, $ajax_event));
             }
         }
     }
     
     public static function add_note() {
-        check_ajax_referer( 'add-invoice-note', '_nonce' );
+        check_ajax_referer('add-invoice-note', '_nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
-        $post_id   = absint( $_POST['post_id'] );
-        $note      = wp_kses_post( trim( stripslashes( $_POST['note'] ) ) );
-        $note_type = sanitize_text_field( $_POST['note_type'] );
+        $post_id   = absint($_POST['post_id']);
+        $note      = wp_kses_post(trim(stripslashes($_POST['note'])));
+        $note_type = sanitize_text_field($_POST['note_type']);
 
         $is_customer_note = $note_type == 'customer' ? 1 : 0;
 
-        if ( $post_id > 0 ) {
-            $note_id = wpinv_insert_payment_note( $post_id, $note, $is_customer_note );
+        if ($post_id > 0) {
+            $note_id = wpinv_insert_payment_note($post_id, $note, $is_customer_note);
 
-            if ( $note_id > 0 && !is_wp_error( $note_id ) ) {
-                wpinv_get_invoice_note_line_item( $note_id );
+            if ($note_id > 0 && !is_wp_error($note_id)) {
+                wpinv_get_invoice_note_line_item($note_id);
             }
         }
 
@@ -140,16 +140,16 @@ 
     }
 
     public static function delete_note() {
-        check_ajax_referer( 'delete-invoice-note', '_nonce' );
+        check_ajax_referer('delete-invoice-note', '_nonce');
 
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
-        $note_id = (int)$_POST['note_id'];
+        $note_id = (int) $_POST['note_id'];
 
-        if ( $note_id > 0 ) {
-            wp_delete_comment( $note_id, true );
+        if ($note_id > 0) {
+            wp_delete_comment($note_id, true);
         }
 
         die();
@@ -167,34 +167,34 @@ 
     public static function get_billing_details() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
         // Can the user manage the plugin?
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
         // Do we have a user id?
         $user_id = $_GET['user_id'];
 
-        if ( empty( $user_id ) || ! is_numeric( $user_id ) ) {
+        if (empty($user_id) || !is_numeric($user_id)) {
             die(-1);
         }
 
         // Fetch the billing details.
-        $billing_details    = wpinv_get_user_address( $user_id );
-        $billing_details    = apply_filters( 'wpinv_ajax_billing_details', $billing_details, $user_id );
+        $billing_details    = wpinv_get_user_address($user_id);
+        $billing_details    = apply_filters('wpinv_ajax_billing_details', $billing_details, $user_id);
 
         // unset the user id and email.
-        $to_ignore = array( 'user_id', 'email' );
+        $to_ignore = array('user_id', 'email');
 
-        foreach ( $to_ignore as $key ) {
-            if ( isset( $billing_details[ $key ] ) ) {
-                unset( $billing_details[ $key ] );
+        foreach ($to_ignore as $key) {
+            if (isset($billing_details[$key])) {
+                unset($billing_details[$key]);
             }
         }
 
-        wp_send_json_success( $billing_details );
+        wp_send_json_success($billing_details);
 
     }
 
@@ -204,47 +204,47 @@ 
     public static function check_new_user_email() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
         // Can the user manage the plugin?
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
         // We need an email address.
-        if ( empty( $_GET['email'] ) ) {
-            _e( "Provide the new user's email address", 'invoicing' );
+        if (empty($_GET['email'])) {
+            _e("Provide the new user's email address", 'invoicing');
             exit;
         }
 
         // Ensure the email is valid.
-        $email = sanitize_text_field( $_GET['email'] );
-        if ( ! is_email( $email ) ) {
-            _e( 'Invalid email address', 'invoicing' );
+        $email = sanitize_text_field($_GET['email']);
+        if (!is_email($email)) {
+            _e('Invalid email address', 'invoicing');
             exit;
         }
 
         // And it does not exist.
-        if ( email_exists( $email ) ) {
-            _e( 'A user with this email address already exists', 'invoicing' );
+        if (email_exists($email)) {
+            _e('A user with this email address already exists', 'invoicing');
             exit;
         }
 
-        wp_send_json_success( true );
+        wp_send_json_success(true);
     }
     
     public static function run_tool() {
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $tool = sanitize_text_field( $_POST['tool'] );
+        $tool = sanitize_text_field($_POST['tool']);
         
-        do_action( 'wpinv_run_tool' );
+        do_action('wpinv_run_tool');
         
-        if ( !empty( $tool ) ) {
-            do_action( 'wpinv_tool_' . $tool );
+        if (!empty($tool)) {
+            do_action('wpinv_tool_' . $tool);
         }
     }
 
@@ -254,30 +254,30 @@ 
     public static function get_payment_form() {
 
         // Check nonce.
-        if ( ! isset( $_GET['nonce'] ) || ! wp_verify_nonce( $_GET['nonce'], 'getpaid_ajax_form' ) ) {
-            _e( 'Error: Reload the page and try again.', 'invoicing' );
+        if (!isset($_GET['nonce']) || !wp_verify_nonce($_GET['nonce'], 'getpaid_ajax_form')) {
+            _e('Error: Reload the page and try again.', 'invoicing');
             exit;
         }
 
         // Is the request set up correctly?
-		if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
+		if (empty($_GET['form']) && empty($_GET['item'])) {
 			echo aui()->alert(
 				array(
 					'type'    => 'warning',
-					'content' => __( 'No payment form or item provided', 'invoicing' ),
+					'content' => __('No payment form or item provided', 'invoicing'),
 				)
             );
             exit;
         }
 
         // Payment form or button?
-		if ( ! empty( $_GET['form'] ) ) {
-            getpaid_display_payment_form( $_GET['form'] );
-		} else if( $_GET['invoice'] ) {
-		    echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
+		if (!empty($_GET['form'])) {
+            getpaid_display_payment_form($_GET['form']);
+		} else if ($_GET['invoice']) {
+		    echo getpaid_display_invoice_payment_form($_GET['invoice']);
         } else {
-			$items = getpaid_convert_items_to_array( $_GET['item'] );
-		    getpaid_display_item_payment_form( $items );
+			$items = getpaid_convert_items_to_array($_GET['item']);
+		    getpaid_display_item_payment_form($items);
         }
 
         exit;
@@ -293,11 +293,11 @@ 
         global $invoicing;
 
         // Check nonce.
-        check_ajax_referer( 'getpaid_form_nonce' );
+        check_ajax_referer('getpaid_form_nonce');
 
         // ... form fields...
-        if ( empty( $_POST['getpaid_payment_form_submission'] ) ) {
-            _e( 'Error: Reload the page and try again.', 'invoicing' );
+        if (empty($_POST['getpaid_payment_form_submission'])) {
+            _e('Error: Reload the page and try again.', 'invoicing');
             exit;
         }
 
@@ -305,66 +305,66 @@ 
         $submission = new GetPaid_Payment_Form_Submission();
 
         // Do we have an error?
-        if ( ! empty( $submission->last_error ) ) {
+        if (!empty($submission->last_error)) {
             echo $submission->last_error;
             exit;
         }
 
         // We need a billing email.
-        if ( ! $submission->has_billing_email() || ! is_email( $submission->get_billing_email() ) ) {
-            wp_send_json_error( __( 'Provide a valid billing email.', 'invoicing' ) );
+        if (!$submission->has_billing_email() || !is_email($submission->get_billing_email())) {
+            wp_send_json_error(__('Provide a valid billing email.', 'invoicing'));
         }
 
         // Clear any checkout errors.
         wpinv_clear_errors();
 
         // Validate the gateway.
-        wpinv_checkout_validate_gateway( $submission );
+        wpinv_checkout_validate_gateway($submission);
 
         // Allow themes and plugins to hook to errors
-        do_action( 'getpaid_checkout_error_checks', $submission );
+        do_action('getpaid_checkout_error_checks', $submission);
 
         // Do we have any errors?
-        if ( wpinv_get_errors() ) {
-            wp_send_json_error( getpaid_get_errors_html() );
+        if (wpinv_get_errors()) {
+            wp_send_json_error(getpaid_get_errors_html());
         }
 
         // Prepare items.
         $items = $submission->get_items();
 
         // Ensure that we have items.
-        if ( empty( $items ) ) {
-            wp_send_json_error( __( 'You have not selected any items.', 'invoicing' ) );
+        if (empty($items)) {
+            wp_send_json_error(__('You have not selected any items.', 'invoicing'));
         }
 
         // Prepare the invoice.
-        if ( ! $submission->has_invoice() ) {
+        if (!$submission->has_invoice()) {
             $invoice = new WPInv_Invoice();
         } else {
             $invoice = $submission->get_invoice();
         }
 
         // Make sure that it is neither paid or refunded.
-        if ( $invoice->is_paid() || $invoice->is_refunded() ) {
-            wp_send_json_error( __( 'This invoice has already been paid for.', 'invoicing' ) );
+        if ($invoice->is_paid() || $invoice->is_refunded()) {
+            wp_send_json_error(__('This invoice has already been paid for.', 'invoicing'));
         }
 
         // Set the billing email.
-        $invoice->set_email( sanitize_email( $submission->get_billing_email() ) );
+        $invoice->set_email(sanitize_email($submission->get_billing_email()));
 
         // Payment form.
-        $invoice->set_payment_form( absint( $submission->get_payment_form()->get_id() ) );
+        $invoice->set_payment_form(absint($submission->get_payment_form()->get_id()));
 
         // Discount code.
-        if ( $submission->has_discount_code() ) {
-            $invoice->set_discount_code( $submission->get_discount_code() );
+        if ($submission->has_discount_code()) {
+            $invoice->set_discount_code($submission->get_discount_code());
         }
 
         // Items, Fees, taxes and discounts.
-        $invoice->set_items( $items );
-        $invoice->set_fees( $submission->get_fees() );
-        $invoice->set_taxes( $submission->get_taxes() );
-        $invoice->set_discounts( $submission->get_discounts() );
+        $invoice->set_items($items);
+        $invoice->set_fees($submission->get_fees());
+        $invoice->set_taxes($submission->get_taxes());
+        $invoice->set_discounts($submission->get_discounts());
 
         // Prepared submission details.
         $prepared = array();
@@ -373,48 +373,48 @@ 
         $data = $submission->get_data();
 
         // Loop throught the submitted details.
-        foreach ( $submission->get_payment_form()->get_elements() as $field ) {
+        foreach ($submission->get_payment_form()->get_elements() as $field) {
 
-            if ( ! empty( $field['premade'] ) ) {
+            if (!empty($field['premade'])) {
                 continue;
             }
 
             // If it is required and not set, abort.
-            if ( ! $submission->is_required_field_set( $field ) ) {
-                wp_send_json_error( __( 'Some required fields are not set.', 'invoicing' ) );
+            if (!$submission->is_required_field_set($field)) {
+                wp_send_json_error(__('Some required fields are not set.', 'invoicing'));
             }
 
             // Handle address fields.
-            if ( $field['type'] == 'address' ) {
+            if ($field['type'] == 'address') {
 
-                foreach ( $field['fields'] as $address_field ) {
+                foreach ($field['fields'] as $address_field) {
 
                     // skip if it is not visible.
-                    if ( empty( $address_field['visible'] ) ) {
+                    if (empty($address_field['visible'])) {
                         continue;
                     }
 
                     // If it is required and not set, abort
-                    if ( ! empty( $address_field['required'] ) && empty( $data[ $address_field['name'] ] ) ) {
-                        wp_send_json_error( __( 'Some required fields are not set.', 'invoicing' ) );
+                    if (!empty($address_field['required']) && empty($data[$address_field['name']])) {
+                        wp_send_json_error(__('Some required fields are not set.', 'invoicing'));
                     }
 
-                    if ( isset( $data[ $address_field['name'] ] ) ) {
-                        $name   = str_replace( 'wpinv_', '', $address_field['name'] );
+                    if (isset($data[$address_field['name']])) {
+                        $name   = str_replace('wpinv_', '', $address_field['name']);
                         $method = "set_$name";
-                        $invoice->$method( wpinv_clean( $data[ $address_field['name'] ] ) );
+                        $invoice->$method(wpinv_clean($data[$address_field['name']]));
                     }
 
                 }
 
-            } else if ( isset( $data[ $field['id'] ] ) ) {
+            } else if (isset($data[$field['id']])) {
                 $label = $field['id'];
 
-                if ( isset( $field['label'] ) ) {
+                if (isset($field['label'])) {
                     $label = $field['label'];
                 }
 
-                $prepared[ wpinv_clean( $label ) ] = wpinv_clean( $data[ $field['id'] ] );
+                $prepared[wpinv_clean($label)] = wpinv_clean($data[$field['id']]);
             }
 
         }
@@ -422,26 +422,26 @@ 
         // (Maybe) create the user.
         $user = get_current_user_id();
 
-        if ( empty( $user ) ) {
-            $user = get_user_by( 'email', $submission->get_billing_email() );
+        if (empty($user)) {
+            $user = get_user_by('email', $submission->get_billing_email());
         }
 
-        if ( empty( $user ) ) {
-            $user = wpinv_create_user( $submission->get_billing_email() );
+        if (empty($user)) {
+            $user = wpinv_create_user($submission->get_billing_email());
         }
 
-        if ( is_wp_error( $user ) ) {
-            wp_send_json_error( $user->get_error_message() );
+        if (is_wp_error($user)) {
+            wp_send_json_error($user->get_error_message());
         }
 
-        if ( is_numeric( $user ) ) {
-            $user = get_user_by( 'id', $user );
+        if (is_numeric($user)) {
+            $user = get_user_by('id', $user);
         }
 
-        $invoice->set_user_id( $user->ID );
+        $invoice->set_user_id($user->ID);
 
         // Set gateway.
-        $invoice->set_gateway( $data['wpi-gateway'] );
+        $invoice->set_gateway($data['wpi-gateway']);
 
         $invoice->recalculate_total();
 
@@ -449,20 +449,20 @@ 
         $invoice->save();
 
         // Was it saved successfully:
-        if ($invoice->get_id() == 0 ) {
-            wp_send_json_error( __( 'An error occured while saving your invoice.', 'invoicing' ) );
+        if ($invoice->get_id() == 0) {
+            wp_send_json_error(__('An error occured while saving your invoice.', 'invoicing'));
         }
 
         // Save payment form data.
-        if ( ! empty( $prepared ) ) {
-            update_post_meta( $invoice->get_id(), 'payment_form_data', $prepared );
+        if (!empty($prepared)) {
+            update_post_meta($invoice->get_id(), 'payment_form_data', $prepared);
         }
 
         // Process the checkout.
-        add_filter( 'wp_redirect', array( $invoicing->form_elements, 'send_redirect_response' ) );
-        add_action( 'wpinv_pre_send_back_to_checkout', array( $invoicing->form_elements, 'checkout_error' ) );
+        add_filter('wp_redirect', array($invoicing->form_elements, 'send_redirect_response'));
+        add_action('wpinv_pre_send_back_to_checkout', array($invoicing->form_elements, 'checkout_error'));
 
-        wpinv_process_checkout( $invoice, $submission );
+        wpinv_process_checkout($invoice, $submission);
 
         // If we are here, there was an error.
         $invoicing->form_elements->checkout_error();
@@ -478,51 +478,51 @@ 
     public static function get_payment_form_states_field() {
         global $invoicing;
 
-        if ( empty( $_GET['country'] ) || empty( $_GET['form'] ) ) {
+        if (empty($_GET['country']) || empty($_GET['form'])) {
             exit;
         }
 
-        $elements = $invoicing->form_elements->get_form_elements( $_GET['form'] );
+        $elements = $invoicing->form_elements->get_form_elements($_GET['form']);
 
-        if ( empty( $elements ) ) {
+        if (empty($elements)) {
             exit;
         }
 
         $address_fields = array();
-        foreach ( $elements as $element ) {
-            if ( 'address' === $element['type'] ) {
+        foreach ($elements as $element) {
+            if ('address' === $element['type']) {
                 $address_fields = $element;
                 break;
             }
         }
 
-        if ( empty( $address_fields ) ) {
+        if (empty($address_fields)) {
             exit;
         }
 
-        foreach( $address_fields['fields'] as $address_field ) {
+        foreach ($address_fields['fields'] as $address_field) {
 
-            if ( 'wpinv_state' == $address_field['name'] ) {
+            if ('wpinv_state' == $address_field['name']) {
 
                 $label = $address_field['label'];
 
-                if ( ! empty( $address_field['required'] ) ) {
+                if (!empty($address_field['required'])) {
                     $label .= "<span class='text-danger'> *</span>";
                 }
 
-                $states = wpinv_get_country_states( $_GET['country'] );
+                $states = wpinv_get_country_states($_GET['country']);
 
-                if ( ! empty( $states ) ) {
+                if (!empty($states)) {
 
                     $html = aui()->select(
                             array(
                                 'options'          => $states,
-                                'name'             => esc_attr( $address_field['name'] ),
-                                'id'               => esc_attr( $address_field['name'] ),
-                                'placeholder'      => esc_attr( $address_field['placeholder'] ),
+                                'name'             => esc_attr($address_field['name']),
+                                'id'               => esc_attr($address_field['name']),
+                                'placeholder'      => esc_attr($address_field['placeholder']),
                                 'required'         => (bool) $address_field['required'],
                                 'no_wrap'          => true,
-                                'label'            => wp_kses_post( $label ),
+                                'label'            => wp_kses_post($label),
                                 'select2'          => false,
                             )
                         );
@@ -531,10 +531,10 @@ 
 
                     $html = aui()->input(
                             array(
-                                'name'       => esc_attr( $address_field['name'] ),
-                                'id'         => esc_attr( $address_field['name'] ),
+                                'name'       => esc_attr($address_field['name']),
+                                'id'         => esc_attr($address_field['name']),
                                 'required'   => (bool) $address_field['required'],
-                                'label'      => wp_kses_post( $label ),
+                                'label'      => wp_kses_post($label),
                                 'no_wrap'    => true,
                                 'type'       => 'text',
                             )
@@ -542,7 +542,7 @@ 
 
                 }
 
-                wp_send_json_success( str_replace( 'sr-only', '', $html ) );
+                wp_send_json_success(str_replace('sr-only', '', $html));
                 exit;
 
             }
@@ -558,56 +558,56 @@ 
     public static function recalculate_invoice_totals() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need an invoice.
-        if ( empty( $_POST['post_id'] ) ) {
+        if (empty($_POST['post_id'])) {
             exit;
         }
 
         // Fetch the invoice.
-        $invoice = new WPInv_Invoice( trim( $_POST['post_id'] ) );
+        $invoice = new WPInv_Invoice(trim($_POST['post_id']));
 
         // Ensure it exists.
-        if ( ! $invoice->get_id() ) {
+        if (!$invoice->get_id()) {
             exit;
         }
 
         // Maybe set the country, state, currency.
-        foreach ( array( 'country', 'state', 'currency' ) as $key ) {
-            if ( isset( $_POST[ $key ] ) ) {
+        foreach (array('country', 'state', 'currency') as $key) {
+            if (isset($_POST[$key])) {
                 $method = "set_$key";
-                $invoice->$method( $_POST[ $key ] );
+                $invoice->$method($_POST[$key]);
             }
         }
 
         // Maybe disable taxes.
-        $invoice->set_disable_taxes( ! empty( $_POST['taxes'] ) );
+        $invoice->set_disable_taxes(!empty($_POST['taxes']));
 
         // Recalculate totals.
         $invoice->recalculate_total();
 
-        $total = wpinv_price( wpinv_format_amount( $invoice->get_total() ), $invoice->get_currency() );
+        $total = wpinv_price(wpinv_format_amount($invoice->get_total()), $invoice->get_currency());
 
-        if ( $invoice->is_recurring() && $invoice->is_parent() && $invoice->get_total() != $invoice->get_recurring_total() ) {
-            $recurring_total = wpinv_price( wpinv_format_amount( $invoice->get_recurring_total() ), $invoice->get_currency() );
-            $total          .= '<small class="form-text text-muted">' . sprintf( __( 'Recurring Price: %s', 'invoicing' ), $recurring_total ) . '</small>';
+        if ($invoice->is_recurring() && $invoice->is_parent() && $invoice->get_total() != $invoice->get_recurring_total()) {
+            $recurring_total = wpinv_price(wpinv_format_amount($invoice->get_recurring_total()), $invoice->get_currency());
+            $total          .= '<small class="form-text text-muted">' . sprintf(__('Recurring Price: %s', 'invoicing'), $recurring_total) . '</small>';
         }
 
         $totals = array(
-            'subtotal' => wpinv_price( wpinv_format_amount( $invoice->get_subtotal() ), $invoice->get_currency() ),
-            'discount' => wpinv_price( wpinv_format_amount( $invoice->get_total_discount() ), $invoice->get_currency() ),
-            'tax'      => wpinv_price( wpinv_format_amount( $invoice->get_total_tax() ), $invoice->get_currency() ),
+            'subtotal' => wpinv_price(wpinv_format_amount($invoice->get_subtotal()), $invoice->get_currency()),
+            'discount' => wpinv_price(wpinv_format_amount($invoice->get_total_discount()), $invoice->get_currency()),
+            'tax'      => wpinv_price(wpinv_format_amount($invoice->get_total_tax()), $invoice->get_currency()),
             'total'    => $total,
         );
 
-        $totals = apply_filters( 'getpaid_invoice_totals', $totals, $invoice );
+        $totals = apply_filters('getpaid_invoice_totals', $totals, $invoice);
 
-        wp_send_json_success( compact( 'totals' ) );
+        wp_send_json_success(compact('totals'));
     }
 
     /**
@@ -616,33 +616,33 @@ 
     public static function get_invoice_items() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need an invoice and items.
-        if ( empty( $_POST['post_id'] ) ) {
+        if (empty($_POST['post_id'])) {
             exit;
         }
 
         // Fetch the invoice.
-        $invoice = new WPInv_Invoice( trim( $_POST['post_id'] ) );
+        $invoice = new WPInv_Invoice(trim($_POST['post_id']));
 
         // Ensure it exists.
-        if ( ! $invoice->get_id() ) {
+        if (!$invoice->get_id()) {
             exit;
         }
 
         // Return an array of invoice items.
         $items = array();
 
-        foreach ( $invoice->get_items() as $item_id => $item ) {
-            $items[ $item_id ] = $item->prepare_data_for_invoice_edit_ajax(  $invoice->get_currency()  );
+        foreach ($invoice->get_items() as $item_id => $item) {
+            $items[$item_id] = $item->prepare_data_for_invoice_edit_ajax($invoice->get_currency());
         }
 
-        wp_send_json_success( compact( 'items' ) );
+        wp_send_json_success(compact('items'));
     }
 
     /**
@@ -651,50 +651,50 @@ 
     public static function edit_invoice_item() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need an invoice and item details.
-        if ( empty( $_POST['post_id'] ) || empty( $_POST['data'] ) ) {
+        if (empty($_POST['post_id']) || empty($_POST['data'])) {
             exit;
         }
 
         // Fetch the invoice.
-        $invoice = new WPInv_Invoice( trim( $_POST['post_id'] ) );
+        $invoice = new WPInv_Invoice(trim($_POST['post_id']));
 
         // Ensure it exists and its not been paid for.
-        if ( ! $invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded() ) {
+        if (!$invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded()) {
             exit;
         }
 
         // Format the data.
-        $data = wp_list_pluck( $_POST['data'], 'value', 'field' );
+        $data = wp_list_pluck($_POST['data'], 'value', 'field');
 
         // Ensure that we have an item id.
-        if ( empty( $data['id'] ) ) {
+        if (empty($data['id'])) {
             exit;
         }
 
         // Abort if the invoice does not have the specified item.
-        $item = $invoice->get_item( (int) $data['id'] );
+        $item = $invoice->get_item((int) $data['id']);
 
-        if ( empty( $item ) ) {
+        if (empty($item)) {
             exit;
         }
 
         // Update the item.
-        $item->set_price( $data['price'] );
-        $item->set_name( $data['name'] );
-        $item->set_description( $data['description'] );
-        $item->set_quantity( $data['quantity'] );
+        $item->set_price($data['price']);
+        $item->set_name($data['name']);
+        $item->set_description($data['description']);
+        $item->set_quantity($data['quantity']);
 
         // Add it to the invoice.
-        $error = $invoice->add_item( $item );
+        $error = $invoice->add_item($item);
         $alert = false;
-        if ( is_wp_error( $error ) ) {
+        if (is_wp_error($error)) {
             $alert = $error->get_error_message();
         }
 
@@ -707,11 +707,11 @@ 
         // Return an array of invoice items.
         $items = array();
 
-        foreach ( $invoice->get_items() as $item_id => $item ) {
-            $items[ $item_id ] = $item->prepare_data_for_invoice_edit_ajax(  $invoice->get_currency()  );
+        foreach ($invoice->get_items() as $item_id => $item) {
+            $items[$item_id] = $item->prepare_data_for_invoice_edit_ajax($invoice->get_currency());
         }
 
-        wp_send_json_success( compact( 'items', 'alert' ) );
+        wp_send_json_success(compact('items', 'alert'));
     }
 
     /**
@@ -720,33 +720,33 @@ 
     public static function remove_invoice_item() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need an invoice and an item.
-        if ( empty( $_POST['post_id'] ) || empty( $_POST['item_id'] ) ) {
+        if (empty($_POST['post_id']) || empty($_POST['item_id'])) {
             exit;
         }
 
         // Fetch the invoice.
-        $invoice = new WPInv_Invoice( trim( $_POST['post_id'] ) );
+        $invoice = new WPInv_Invoice(trim($_POST['post_id']));
 
         // Ensure it exists and its not been paid for.
-        if ( ! $invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded() ) {
+        if (!$invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded()) {
             exit;
         }
 
         // Abort if the invoice does not have the specified item.
-        $item = $invoice->get_item( (int) $_POST['item_id'] );
+        $item = $invoice->get_item((int) $_POST['item_id']);
 
-        if ( empty( $item ) ) {
+        if (empty($item)) {
             exit;
         }
 
-        $invoice->remove_item( (int) $_POST['item_id'] );
+        $invoice->remove_item((int) $_POST['item_id']);
 
         // Update totals.
         $invoice->recalculate_total();
@@ -757,11 +757,11 @@ 
         // Return an array of invoice items.
         $items = array();
 
-        foreach ( $invoice->get_items() as $item_id => $item ) {
-            $items[ $item_id ] = $item->prepare_data_for_invoice_edit_ajax(  $invoice->get_currency()  );
+        foreach ($invoice->get_items() as $item_id => $item) {
+            $items[$item_id] = $item->prepare_data_for_invoice_edit_ajax($invoice->get_currency());
         }
 
-        wp_send_json_success( compact( 'items' ) );
+        wp_send_json_success(compact('items'));
     }
 
     /**
@@ -770,39 +770,39 @@ 
     public static function add_invoice_items() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need an invoice and items.
-        if ( empty( $_POST['post_id'] ) || empty( $_POST['items'] ) ) {
+        if (empty($_POST['post_id']) || empty($_POST['items'])) {
             exit;
         }
 
         // Fetch the invoice.
-        $invoice = new WPInv_Invoice( trim( $_POST['post_id'] ) );
+        $invoice = new WPInv_Invoice(trim($_POST['post_id']));
         $alert   = false;
 
         // Ensure it exists and its not been paid for.
-        if ( ! $invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded() ) {
+        if (!$invoice->get_id() || $invoice->is_paid() || $invoice->is_refunded()) {
             exit;
         }
 
         // Add the items.
-        foreach ( $_POST['items'] as $data ) {
+        foreach ($_POST['items'] as $data) {
 
-            $item = new GetPaid_Form_Item( $data[ 'id' ] );
+            $item = new GetPaid_Form_Item($data['id']);
 
-            if ( is_numeric( $data[ 'qty' ] ) && (int) $data[ 'qty' ] > 0 ) {
-                $item->set_quantity( $data[ 'qty' ] );
+            if (is_numeric($data['qty']) && (int) $data['qty'] > 0) {
+                $item->set_quantity($data['qty']);
             }
 
-            if ( $item->get_id() > 0 ) {
-                $error = $invoice->add_item( $item );
+            if ($item->get_id() > 0) {
+                $error = $invoice->add_item($item);
 
-                if ( is_wp_error( $error ) ) {
+                if (is_wp_error($error)) {
                     $alert = $error->get_error_message();
                 }
 
@@ -817,11 +817,11 @@ 
         // Return an array of invoice items.
         $items = array();
 
-        foreach ( $invoice->get_items() as $item_id => $item ) {
-            $items[ $item_id ] = $item->prepare_data_for_invoice_edit_ajax( $invoice->get_currency() );
+        foreach ($invoice->get_items() as $item_id => $item) {
+            $items[$item_id] = $item->prepare_data_for_invoice_edit_ajax($invoice->get_currency());
         }
 
-        wp_send_json_success( compact( 'items', 'alert' ) );
+        wp_send_json_success(compact('items', 'alert'));
     }
 
     /**
@@ -830,15 +830,15 @@ 
     public static function get_invoicing_items() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             exit;
         }
 
         // We need a search term.
-        if ( empty( $_GET['search'] ) ) {
-            wp_send_json_success( array() );
+        if (empty($_GET['search'])) {
+            wp_send_json_success(array());
         }
 
         // Retrieve items.
@@ -847,8 +847,8 @@ 
             'orderby'        => 'title',
             'order'          => 'ASC',
             'posts_per_page' => -1,
-            'post_status'    => array( 'publish' ),
-            's'              => trim( $_GET['search'] ),
+            'post_status'    => array('publish'),
+            's'              => trim($_GET['search']),
             'meta_query'     => array(
                 array(
                     'key'       => '_wpinv_type',
@@ -858,18 +858,18 @@ 
             )
         );
 
-        $items = get_posts( apply_filters( 'getpaid_ajax_invoice_items_query_args', $item_args ) );
+        $items = get_posts(apply_filters('getpaid_ajax_invoice_items_query_args', $item_args));
         $data  = array();
 
-        foreach ( $items as $item ) {
-            $item      = new GetPaid_Form_Item( $item );
+        foreach ($items as $item) {
+            $item = new GetPaid_Form_Item($item);
             $data[] = array(
                 'id'   => $item->get_id(),
                 'text' => $item->get_name()
             );
         }
 
-        wp_send_json_success( $data );
+        wp_send_json_success($data);
 
     }
 
@@ -879,24 +879,24 @@ 
     public static function get_aui_states_field() {
 
         // Verify nonce.
-        check_ajax_referer( 'wpinv-nonce' );
+        check_ajax_referer('wpinv-nonce');
 
         // We need a country.
-        if ( empty( $_GET['country'] ) ) {
+        if (empty($_GET['country'])) {
             exit;
         }
 
-        $states = wpinv_get_country_states( trim( $_GET['country'] ) );
-        $state  = isset( $_GET['state'] ) ? trim( $_GET['state'] ) : wpinv_get_default_state();
+        $states = wpinv_get_country_states(trim($_GET['country']));
+        $state  = isset($_GET['state']) ? trim($_GET['state']) : wpinv_get_default_state();
 
-        if ( empty( $states ) ) {
+        if (empty($states)) {
 
             $html = aui()->input(
                 array(
                     'type'        => 'text',
                     'id'          => 'wpinv_state',
                     'name'        => 'wpinv_state',
-                    'label'       => __( 'State', 'invoicing' ),
+                    'label'       => __('State', 'invoicing'),
                     'label_type'  => 'vertical',
                     'placeholder' => 'Liège',
                     'class'       => 'form-control-sm',
@@ -910,9 +910,9 @@ 
                 array(
                     'id'          => 'wpinv_state',
                     'name'        => 'wpinv_state',
-                    'label'       => __( 'State', 'invoicing' ),
+                    'label'       => __('State', 'invoicing'),
                     'label_type'  => 'vertical',
-                    'placeholder' => __( 'Select a state', 'invoicing' ),
+                    'placeholder' => __('Select a state', 'invoicing'),
                     'class'       => 'form-control-sm',
                     'value'       => $state,
                     'options'     => $states,
@@ -926,7 +926,7 @@ 
         wp_send_json_success(
             array(
                 'html'   => $html,
-                'select' => ! empty ( $states )
+                'select' => !empty ($states)
             )
         );
 
@@ -940,46 +940,46 @@ 
     public static function ip_geolocation() {
 
         // Check nonce.
-        check_ajax_referer( 'getpaid-ip-location' );
+        check_ajax_referer('getpaid-ip-location');
 
         // IP address.
-        if ( empty( $_GET['ip'] ) || ! rest_is_ip_address( $_GET['ip'] ) ) {
-            _e( 'Invalid IP Address.', 'invoicing' );
+        if (empty($_GET['ip']) || !rest_is_ip_address($_GET['ip'])) {
+            _e('Invalid IP Address.', 'invoicing');
             exit;
         }
 
         // Retrieve location info.
-        $location = getpaid_geolocate_ip_address( $_GET['ip'] );
+        $location = getpaid_geolocate_ip_address($_GET['ip']);
 
-        if ( empty( $location ) ) {
-            _e( 'Unable to find geolocation for the IP Address.', 'invoicing' );
+        if (empty($location)) {
+            _e('Unable to find geolocation for the IP Address.', 'invoicing');
             exit;
         }
 
         // Sorry.
-        extract( $location );
+        extract($location);
 
         // Prepare the address.
         $content = '';
 
-        if ( ! empty( $location['city'] ) ) {
-            $content .=  $location['city']  . ', ';
+        if (!empty($location['city'])) {
+            $content .= $location['city'] . ', ';
         }
         
-        if ( ! empty( $location['region'] ) ) {
-            $content .=  $location['region']  . ', ';
+        if (!empty($location['region'])) {
+            $content .= $location['region'] . ', ';
         }
         
-        $content .=  $location['country'] . ' (' . $location['iso'] . ')';
+        $content .= $location['country'] . ' (' . $location['iso'] . ')';
 
         $location['address'] = $content;
 
-        $content  = '<p>'. sprintf( __( '<b>Address:</b> %s', 'invoicing' ), $content ) . '</p>';
-        $content .= '<p>'. $location['credit'] . '</p>';
+        $content  = '<p>' . sprintf(__('<b>Address:</b> %s', 'invoicing'), $content) . '</p>';
+        $content .= '<p>' . $location['credit'] . '</p>';
 
         $location['content'] = $content;
 
-        wpinv_get_template( 'geolocation.php', $location );
+        wpinv_get_template('geolocation.php', $location);
 
         exit;
     }
@@ -992,11 +992,11 @@ 
     public static function payment_form_refresh_prices() {
 
         // Check nonce.
-        check_ajax_referer( 'getpaid_form_nonce' );
+        check_ajax_referer('getpaid_form_nonce');
 
         // ... form fields...
-        if ( empty( $_POST['getpaid_payment_form_submission'] ) ) {
-            _e( 'Error: Reload the page and try again.', 'invoicing' );
+        if (empty($_POST['getpaid_payment_form_submission'])) {
+            _e('Error: Reload the page and try again.', 'invoicing');
             exit;
         }
 
@@ -1004,7 +1004,7 @@ 
         $submission = new GetPaid_Payment_Form_Submission();
 
         // Do we have an error?
-        if ( ! empty( $submission->last_error ) ) {
+        if (!empty($submission->last_error)) {
             echo $submission->last_error;
             exit;
         }
@@ -1017,43 +1017,43 @@ 
             'is_free'       => $submission->get_payment_details(),
 
             'totals'        => array(
-                'subtotal'  => wpinv_price( wpinv_format_amount( $submission->subtotal_amount ), $submission->get_currency() ),
-                'discount'  => wpinv_price( wpinv_format_amount( $submission->get_total_discount() ), $submission->get_currency() ),
-                'fees'      => wpinv_price( wpinv_format_amount( $submission->get_total_fees() ), $submission->get_currency() ),
-                'tax'       => wpinv_price( wpinv_format_amount( $submission->get_total_tax() ), $submission->get_currency() ),
-                'total'     => wpinv_price( wpinv_format_amount( $submission->get_total() ), $submission->get_currency() ),
+                'subtotal'  => wpinv_price(wpinv_format_amount($submission->subtotal_amount), $submission->get_currency()),
+                'discount'  => wpinv_price(wpinv_format_amount($submission->get_total_discount()), $submission->get_currency()),
+                'fees'      => wpinv_price(wpinv_format_amount($submission->get_total_fees()), $submission->get_currency()),
+                'tax'       => wpinv_price(wpinv_format_amount($submission->get_total_tax()), $submission->get_currency()),
+                'total'     => wpinv_price(wpinv_format_amount($submission->get_total()), $submission->get_currency()),
             ),
 
             'texts'         => array(
-                '.getpaid-checkout-total-payable' => wpinv_price( wpinv_format_amount( $submission->get_total() ), $submission->get_currency() ),
+                '.getpaid-checkout-total-payable' => wpinv_price(wpinv_format_amount($submission->get_total()), $submission->get_currency()),
             )
 
         );
 
         // Add items.
         $items = $submission->get_items();
-        if ( ! empty( $items ) ) {
+        if (!empty($items)) {
             $result['items'] = array();
 
-            foreach( $items as $item_id => $item ) {
-                $result['items']["$item_id"] = wpinv_price( wpinv_format_amount( $item->get_price() * $item->get_quantity() ) );
+            foreach ($items as $item_id => $item) {
+                $result['items']["$item_id"] = wpinv_price(wpinv_format_amount($item->get_price() * $item->get_quantity()));
             }
         }
 
         // Add invoice.
-        if ( $submission->has_invoice() ) {
+        if ($submission->has_invoice()) {
             $result['invoice'] = $submission->get_invoice()->ID;
         }
 
         // Add discount code.
-        if ( $submission->has_discount_code() ) {
+        if ($submission->has_discount_code()) {
             $result['discount_code'] = $submission->get_discount_code();
         }
 
         // Filter the result.
-        $result = apply_filters( 'getpaid_payment_form_ajax_refresh_prices', $result, $submission );
+        $result = apply_filters('getpaid_payment_form_ajax_refresh_prices', $result, $submission);
 
-        wp_send_json_success( $result );
+        wp_send_json_success($result);
     }
 
     /**
@@ -1064,53 +1064,53 @@ 
     public static function buy_items() {
         $user_id = get_current_user_id();
 
-        if ( empty( $user_id ) ) { // If not logged in then lets redirect to the login page
-            wp_send_json( array(
-                'success' => wp_login_url( wp_get_referer() )
-            ) );
+        if (empty($user_id)) { // If not logged in then lets redirect to the login page
+            wp_send_json(array(
+                'success' => wp_login_url(wp_get_referer())
+            ));
         } else {
             // Only check nonce if logged in as it could be cached when logged out.
-            if ( ! isset( $_POST['wpinv_buy_nonce'] ) || ! wp_verify_nonce( $_POST['wpinv_buy_nonce'], 'wpinv_buy_items' ) ) {
-                wp_send_json( array(
-                    'error' => __( 'Security checks failed.', 'invoicing' )
-                ) );
+            if (!isset($_POST['wpinv_buy_nonce']) || !wp_verify_nonce($_POST['wpinv_buy_nonce'], 'wpinv_buy_items')) {
+                wp_send_json(array(
+                    'error' => __('Security checks failed.', 'invoicing')
+                ));
                 wp_die();
             }
 
             // allow to set a custom price through post_id
             $items = $_POST['items'];
-            $related_post_id = isset( $_POST['post_id'] ) ? (int)$_POST['post_id'] : 0;
-            $custom_item_price = $related_post_id ? abs( get_post_meta( $related_post_id, '_wpi_custom_price', true ) ) : 0;
+            $related_post_id = isset($_POST['post_id']) ? (int) $_POST['post_id'] : 0;
+            $custom_item_price = $related_post_id ? abs(get_post_meta($related_post_id, '_wpi_custom_price', true)) : 0;
 
             $cart_items = array();
-            if ( $items ) {
-                $items = explode( ',', $items );
+            if ($items) {
+                $items = explode(',', $items);
 
-                foreach( $items as $item ) {
+                foreach ($items as $item) {
                     $item_id = $item;
                     $quantity = 1;
 
-                    if ( strpos( $item, '|' ) !== false ) {
-                        $item_parts = explode( '|', $item );
+                    if (strpos($item, '|') !== false) {
+                        $item_parts = explode('|', $item);
                         $item_id = $item_parts[0];
                         $quantity = $item_parts[1];
                     }
 
-                    if ( $item_id && $quantity ) {
+                    if ($item_id && $quantity) {
                         $cart_items_arr = array(
-                            'id'            => (int)$item_id,
-                            'quantity'      => (int)$quantity
+                            'id'            => (int) $item_id,
+                            'quantity'      => (int) $quantity
                         );
 
                         // If there is a related post id then add it to meta
-                        if ( $related_post_id ) {
+                        if ($related_post_id) {
                             $cart_items_arr['meta'] = array(
                                 'post_id'   => $related_post_id
                             );
                         }
 
                         // If there is a custom price then set it.
-                        if ( $custom_item_price ) {
+                        if ($custom_item_price) {
                             $cart_items_arr['custom_price'] = $custom_item_price;
                         }
 
@@ -1126,37 +1126,37 @@ 
              * @param int $related_post_id The related post id if any.
              * @since 1.0.0
              */
-            $cart_items = apply_filters( 'wpinv_buy_cart_items', $cart_items, $related_post_id );
+            $cart_items = apply_filters('wpinv_buy_cart_items', $cart_items, $related_post_id);
 
             // Make sure its not in the cart already, if it is then redirect to checkout.
             $cart_invoice = wpinv_get_invoice_cart();
 
-            if ( isset( $cart_invoice->items ) && !empty( $cart_invoice->items ) && !empty( $cart_items ) && serialize( $cart_invoice->items ) == serialize( $cart_items ) ) {
-                wp_send_json( array(
+            if (isset($cart_invoice->items) && !empty($cart_invoice->items) && !empty($cart_items) && serialize($cart_invoice->items) == serialize($cart_items)) {
+                wp_send_json(array(
                     'success' =>  $cart_invoice->get_checkout_payment_url()
-                ) );
+                ));
                 wp_die();
             }
 
             // Check if user has invoice with same items waiting to be paid.
-            $user_invoices = wpinv_get_users_invoices( $user_id , 10 , false , 'wpi-pending' );
-            if ( !empty( $user_invoices ) ) {
-                foreach( $user_invoices as $user_invoice ) {
+            $user_invoices = wpinv_get_users_invoices($user_id, 10, false, 'wpi-pending');
+            if (!empty($user_invoices)) {
+                foreach ($user_invoices as $user_invoice) {
                     $user_cart_details = array();
-                    $invoice  = wpinv_get_invoice( $user_invoice->ID );
+                    $invoice = wpinv_get_invoice($user_invoice->ID);
                     $cart_details = $invoice->get_cart_details();
 
-                    if ( !empty( $cart_details ) ) {
-                        foreach ( $cart_details as $invoice_item ) {
+                    if (!empty($cart_details)) {
+                        foreach ($cart_details as $invoice_item) {
                             $ii_arr = array();
-                            $ii_arr['id'] = (int)$invoice_item['id'];
-                            $ii_arr['quantity'] = (int)$invoice_item['quantity'];
+                            $ii_arr['id'] = (int) $invoice_item['id'];
+                            $ii_arr['quantity'] = (int) $invoice_item['quantity'];
 
-                            if (isset( $invoice_item['meta'] ) && !empty( $invoice_item['meta'] ) ) {
+                            if (isset($invoice_item['meta']) && !empty($invoice_item['meta'])) {
                                 $ii_arr['meta'] = $invoice_item['meta'];
                             }
 
-                            if ( isset( $invoice_item['custom_price'] ) && !empty( $invoice_item['custom_price'] ) ) {
+                            if (isset($invoice_item['custom_price']) && !empty($invoice_item['custom_price'])) {
                                 $ii_arr['custom_price'] = $invoice_item['custom_price'];
                             }
 
@@ -1164,17 +1164,17 @@ 
                         }
                     }
 
-                    if ( !empty( $user_cart_details ) && serialize( $cart_items ) == serialize( $user_cart_details ) ) {
-                        wp_send_json( array(
+                    if (!empty($user_cart_details) && serialize($cart_items) == serialize($user_cart_details)) {
+                        wp_send_json(array(
                             'success' =>  $invoice->get_checkout_payment_url()
-                        ) );
+                        ));
                         wp_die();
                     }
                 }
             }
 
             // Create invoice and send user to checkout
-            if ( !empty( $cart_items ) ) {
+            if (!empty($cart_items)) {
                 $invoice_data = array(
                     'status'        =>  'wpi-pending',
                     'created_via'   =>  'wpi',
@@ -1182,21 +1182,21 @@ 
                     'cart_details'  =>  $cart_items,
                 );
 
-                $invoice = wpinv_insert_invoice( $invoice_data, true );
+                $invoice = wpinv_insert_invoice($invoice_data, true);
 
-                if ( !empty( $invoice ) && isset( $invoice->ID ) ) {
-                    wp_send_json( array(
+                if (!empty($invoice) && isset($invoice->ID)) {
+                    wp_send_json(array(
                         'success' =>  $invoice->get_checkout_payment_url()
-                    ) );
+                    ));
                 } else {
-                    wp_send_json( array(
-                        'error' => __( 'Invoice failed to create', 'invoicing' )
-                    ) );
+                    wp_send_json(array(
+                        'error' => __('Invoice failed to create', 'invoicing')
+                    ));
                 }
             } else {
-                wp_send_json( array(
-                    'error' => __( 'Items not valid.', 'invoicing' )
-                ) );
+                wp_send_json(array(
+                    'error' => __('Items not valid.', 'invoicing')
+                ));
             }
         }
 

includes/api/class-getpaid-rest-controller.php

Indentation +542 added lines, -542 removed lines

@@ -21,570 +21,570 @@
  */
 class GetPaid_REST_Controller extends WP_REST_Controller {
 
-	/**
+    /**
      * The namespaces of this controller's route.
      *
      * @since 1.0.19
      * @var array
      */
-	protected $namespaces;
+    protected $namespaces;
 
-	/**
+    /**
      * The official namespace of this controller's route.
      *
      * @since 1.0.19
      * @var string
      */
-	protected $namespace = 'getpaid/v1';
+    protected $namespace = 'getpaid/v1';
 
-	/**
+    /**
      * Cached results of get_item_schema.
      *
      * @since 1.0.19
      * @var array
      */
-	protected $schema;
+    protected $schema;
 
     /**
-	 * Constructor.
-	 *
-	 * @since 1.0.19
-	 *
-	 */
-	public function __construct() {
-
-		// Offer several namespaces for backwards compatibility.
-		$this->namespaces = apply_filters(
-			'getpaid_rest_api_namespaces',
-			array(
-				'getpaid/v1',
-				'invoicing/v1',
-				'wpi/v1'
-			)
-		);
-
-		// Register REST routes.
+     * Constructor.
+     *
+     * @since 1.0.19
+     *
+     */
+    public function __construct() {
+
+        // Offer several namespaces for backwards compatibility.
+        $this->namespaces = apply_filters(
+            'getpaid_rest_api_namespaces',
+            array(
+                'getpaid/v1',
+                'invoicing/v1',
+                'wpi/v1'
+            )
+        );
+
+        // Register REST routes.
         add_action( 'rest_api_init', array( $this, 'register_routes' ) );
 
-	}
-
-	/**
-	 * Registers routes for each namespace.
-	 *
-	 * @since 1.0.19
-	 *
-	 */
-	public function register_routes() {
-
-		foreach ( $this->namespaces as $namespace ) {
-			$this->register_namespace_routes( $namespace );
-		}
-
-	}
-
-	/**
-	 * Registers routes for a namespace.
-	 *
-	 * @since 1.0.19
-	 *
-	 * @param string $namespace
-	 */
-	public function register_namespace_routes( /** @scrutinizer ignore-unused */ $namespace ) {
-
-		getpaid_doing_it_wrong(
-			__CLASS__ . '::' .__METHOD__,
-			/* translators: %s: register_namespace_routes() */
-			sprintf( __( "Method '%s' must be overridden." ), __METHOD__ ),
-			'1.0.19'
-		);
-
-	}
-
-	/**
-	 * Get normalized rest base.
-	 *
-	 * @return string
-	 */
-	protected function get_normalized_rest_base() {
-		return preg_replace( '/\(.*\)\//i', '', $this->rest_base );
-	}
-
-	/**
-	 * Fill batches.
-	 *
-	 * @param array array of request items.
-	 * @return array
-	 */
-	protected function fill_batch_keys( $items ) {
-
-		$items['create'] = empty( $items['create'] ) ? array() : $items['create'];
-		$items['update'] = empty( $items['update'] ) ? array() : $items['update'];
-		$items['delete'] = empty( $items['delete'] ) ? array() : wp_parse_id_list( $items['delete'] );
-		return $items;
-
-	}
-
-	/**
-	 * Check batch limit.
-	 *
-	 * @param array $items Request items.
-	 * @return bool|WP_Error
-	 */
-	protected function check_batch_limit( $items ) {
-		$limit = apply_filters( 'getpaid_rest_batch_items_limit', 100, $this->get_normalized_rest_base() );
-		$total = count( $items['create'] ) + count( $items['update'] ) + count( $items['delete'] );
-
-		if ( $total > $limit ) {
-			/* translators: %s: items limit */
-			return new WP_Error( 'getpaid_rest_request_entity_too_large', sprintf( __( 'Unable to accept more than %s items for this request.', 'invoicing' ), $limit ), array( 'status' => 413 ) );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Bulk create items.
-	 *
-	 * @param array $items Array of items to create.
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @param WP_REST_Server $wp_rest_server
-	 * @return array()
-	 */
-	protected function batch_create_items( $items, $request, $wp_rest_server ) {
-
-		$query  = $request->get_query_params();
-		$create = array();
-
-		foreach ( $items as $item ) {
-			$_item = new WP_REST_Request( 'POST' );
-
-			// Default parameters.
-			$defaults = array();
-			$schema   = $this->get_public_item_schema();
-			foreach ( $schema['properties'] as $arg => $options ) {
-				if ( isset( $options['default'] ) ) {
-					$defaults[ $arg ] = $options['default'];
-				}
-			}
-			$_item->set_default_params( $defaults );
-
-			// Set request parameters.
-			$_item->set_body_params( $item );
-
-			// Set query (GET) parameters.
-			$_item->set_query_params( $query );
-
-			// Create the item.
-			$_response = $this->create_item( $_item );
-
-			// If an error occured...
-			if ( is_wp_error( $_response ) ) {
-
-				$create[]   = array(
-					'id'    => 0,
-					'error' => array(
-						'code'    => $_response->get_error_code(),
-						'message' => $_response->get_error_message(),
-						'data'    => $_response->get_error_data(),
-					),
-				);
-
-				continue;
-			}
-
-			$create[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
-
-		}
-
-		return $create;
+    }
+
+    /**
+     * Registers routes for each namespace.
+     *
+     * @since 1.0.19
+     *
+     */
+    public function register_routes() {
+
+        foreach ( $this->namespaces as $namespace ) {
+            $this->register_namespace_routes( $namespace );
+        }
+
+    }
+
+    /**
+     * Registers routes for a namespace.
+     *
+     * @since 1.0.19
+     *
+     * @param string $namespace
+     */
+    public function register_namespace_routes( /** @scrutinizer ignore-unused */ $namespace ) {
+
+        getpaid_doing_it_wrong(
+            __CLASS__ . '::' .__METHOD__,
+            /* translators: %s: register_namespace_routes() */
+            sprintf( __( "Method '%s' must be overridden." ), __METHOD__ ),
+            '1.0.19'
+        );
+
+    }
+
+    /**
+     * Get normalized rest base.
+     *
+     * @return string
+     */
+    protected function get_normalized_rest_base() {
+        return preg_replace( '/\(.*\)\//i', '', $this->rest_base );
+    }
+
+    /**
+     * Fill batches.
+     *
+     * @param array array of request items.
+     * @return array
+     */
+    protected function fill_batch_keys( $items ) {
+
+        $items['create'] = empty( $items['create'] ) ? array() : $items['create'];
+        $items['update'] = empty( $items['update'] ) ? array() : $items['update'];
+        $items['delete'] = empty( $items['delete'] ) ? array() : wp_parse_id_list( $items['delete'] );
+        return $items;
+
+    }
+
+    /**
+     * Check batch limit.
+     *
+     * @param array $items Request items.
+     * @return bool|WP_Error
+     */
+    protected function check_batch_limit( $items ) {
+        $limit = apply_filters( 'getpaid_rest_batch_items_limit', 100, $this->get_normalized_rest_base() );
+        $total = count( $items['create'] ) + count( $items['update'] ) + count( $items['delete'] );
+
+        if ( $total > $limit ) {
+            /* translators: %s: items limit */
+            return new WP_Error( 'getpaid_rest_request_entity_too_large', sprintf( __( 'Unable to accept more than %s items for this request.', 'invoicing' ), $limit ), array( 'status' => 413 ) );
+        }
+
+        return true;
+    }
+
+    /**
+     * Bulk create items.
+     *
+     * @param array $items Array of items to create.
+     * @param WP_REST_Request $request Full details about the request.
+     * @param WP_REST_Server $wp_rest_server
+     * @return array()
+     */
+    protected function batch_create_items( $items, $request, $wp_rest_server ) {
+
+        $query  = $request->get_query_params();
+        $create = array();
+
+        foreach ( $items as $item ) {
+            $_item = new WP_REST_Request( 'POST' );
+
+            // Default parameters.
+            $defaults = array();
+            $schema   = $this->get_public_item_schema();
+            foreach ( $schema['properties'] as $arg => $options ) {
+                if ( isset( $options['default'] ) ) {
+                    $defaults[ $arg ] = $options['default'];
+                }
+            }
+            $_item->set_default_params( $defaults );
+
+            // Set request parameters.
+            $_item->set_body_params( $item );
+
+            // Set query (GET) parameters.
+            $_item->set_query_params( $query );
+
+            // Create the item.
+            $_response = $this->create_item( $_item );
+
+            // If an error occured...
+            if ( is_wp_error( $_response ) ) {
+
+                $create[]   = array(
+                    'id'    => 0,
+                    'error' => array(
+                        'code'    => $_response->get_error_code(),
+                        'message' => $_response->get_error_message(),
+                        'data'    => $_response->get_error_data(),
+                    ),
+                );
+
+                continue;
+            }
+
+            $create[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
+
+        }
+
+        return $create;
+
+    }
+
+    /**
+     * Bulk update items.
+     *
+     * @param array $items Array of items to update.
+     * @param WP_REST_Request $request Full details about the request.
+     * @param WP_REST_Server $wp_rest_server
+     * @return array()
+     */
+    protected function batch_update_items( $items, $request, $wp_rest_server ) {
+
+        $query  = $request->get_query_params();
+        $update = array();
+
+        foreach ( $items as $item ) {
+
+            // Create a dummy request.
+            $_item = new WP_REST_Request( 'PUT' );
+
+            // Add body params.
+            $_item->set_body_params( $item );
+
+            // Set query (GET) parameters.
+            $_item->set_query_params( $query );
+
+            // Update the item.
+            $_response = $this->update_item( $_item );
+
+            // If an error occured...
+            if ( is_wp_error( $_response ) ) {
+
+                $update[] = array(
+                    'id'    => $item['id'],
+                    'error' => array(
+                        'code'    => $_response->get_error_code(),
+                        'message' => $_response->get_error_message(),
+                        'data'    => $_response->get_error_data(),
+                    ),
+                );
+
+                continue;
+
+            }
+
+            $update[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
+
+        }
+
+        return $update;
+
+    }
+
+    /**
+     * Bulk delete items.
+     *
+     * @param array $items Array of items to delete.
+     * @param WP_REST_Server $wp_rest_server
+     * @return array()
+     */
+    protected function batch_delete_items( $items, $wp_rest_server ) {
+
+        $delete = array();
+
+        foreach ( array_filter( $items ) as $id ) {
+
+            // Prepare the request.
+            $_item = new WP_REST_Request( 'DELETE' );
+            $_item->set_query_params(
+                array(
+                    'id'    => $id,
+                    'force' => true,
+                )
+            );
+
+            // Delete the item.
+            $_response = $this->delete_item( $_item );
+
+            if ( is_wp_error( $_response ) ) {
+
+                $delete[] = array(
+                    'id'    => $id,
+                    'error' => array(
+                        'code'    => $_response->get_error_code(),
+                        'message' => $_response->get_error_message(),
+                        'data'    => $_response->get_error_data(),
+                    ),
+                );
+
+                continue;
+            }
 
-	}
-
-	/**
-	 * Bulk update items.
-	 *
-	 * @param array $items Array of items to update.
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @param WP_REST_Server $wp_rest_server
-	 * @return array()
-	 */
-	protected function batch_update_items( $items, $request, $wp_rest_server ) {
-
-		$query  = $request->get_query_params();
-		$update = array();
-
-		foreach ( $items as $item ) {
-
-			// Create a dummy request.
-			$_item = new WP_REST_Request( 'PUT' );
-
-			// Add body params.
-			$_item->set_body_params( $item );
-
-			// Set query (GET) parameters.
-			$_item->set_query_params( $query );
-
-			// Update the item.
-			$_response = $this->update_item( $_item );
-
-			// If an error occured...
-			if ( is_wp_error( $_response ) ) {
-
-				$update[] = array(
-					'id'    => $item['id'],
-					'error' => array(
-						'code'    => $_response->get_error_code(),
-						'message' => $_response->get_error_message(),
-						'data'    => $_response->get_error_data(),
-					),
-				);
-
-				continue;
-
-			}
-
-			$update[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
-
-		}
-
-		return $update;
-
-	}
+            $delete[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
 
-	/**
-	 * Bulk delete items.
-	 *
-	 * @param array $items Array of items to delete.
-	 * @param WP_REST_Server $wp_rest_server
-	 * @return array()
-	 */
-	protected function batch_delete_items( $items, $wp_rest_server ) {
-
-		$delete = array();
-
-		foreach ( array_filter( $items ) as $id ) {
-
-			// Prepare the request.
-			$_item = new WP_REST_Request( 'DELETE' );
-			$_item->set_query_params(
-				array(
-					'id'    => $id,
-					'force' => true,
-				)
-			);
-
-			// Delete the item.
-			$_response = $this->delete_item( $_item );
-
-			if ( is_wp_error( $_response ) ) {
-
-				$delete[] = array(
-					'id'    => $id,
-					'error' => array(
-						'code'    => $_response->get_error_code(),
-						'message' => $_response->get_error_message(),
-						'data'    => $_response->get_error_data(),
-					),
-				);
-
-				continue;
-			}
-
-			$delete[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
-
-		}
-
-		return $delete;
-
-	}
-
-	/**
-	 * Bulk create, update and delete items.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|array.
-	 */
-	public function batch_items( $request ) {
-		global $wp_rest_server;
-
-		// Prepare the batch items.
-		$items = $this->fill_batch_keys( array_filter( $request->get_params() ) );
-
-		// Ensure that the batch has not exceeded the limit to prevent abuse.
-		$limit = $this->check_batch_limit( $items );
-		if ( is_wp_error( $limit ) ) {
-			return $limit;
-		}
-
-		// Process the items.
-		return array(
-			'create' => $this->batch_create_items( $items['create'], $request, $wp_rest_server ),
-			'update' => $this->batch_update_items( $items['update'], $request, $wp_rest_server ),
-			'delete' => $this->batch_delete_items( $items['delete'], $wp_rest_server ),
-		);
-
-	}
-
-	/**
-	 * Add meta query.
-	 *
-	 * @since 1.0.19
-	 * @param array $args       Query args.
-	 * @param array $meta_query Meta query.
-	 * @return array
-	 */
-	protected function add_meta_query( $args, $meta_query ) {
-		if ( empty( $args['meta_query'] ) ) {
-			$args['meta_query'] = array();
-		}
-
-		$args['meta_query'][] = $meta_query;
-
-		return $args['meta_query'];
-	}
-
-	/**
-	 * Get the batch schema, conforming to JSON Schema.
-	 *
-	 * @return array
-	 */
-	public function get_public_batch_schema() {
-
-		return array(
-			'$schema'    => 'http://json-schema.org/draft-04/schema#',
-			'title'      => 'batch',
-			'type'       => 'object',
-			'properties' => array(
-				'create' => array(
-					'description' => __( 'List of created resources.', 'invoicing' ),
-					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
-					'items'       => array(
-						'type'    => 'object',
-					),
-				),
-				'update' => array(
-					'description' => __( 'List of updated resources.', 'invoicing' ),
-					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
-					'items'       => array(
-						'type'    => 'object',
-					),
-				),
-				'delete' => array(
-					'description' => __( 'List of deleted resources.', 'invoicing' ),
-					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
-					'items'       => array(
-						'type'    => 'integer',
-					),
-				),
-			),
-		);
-
-	}
-
-	/**
-	 * Returns the value of schema['properties']
-	 * 
-	 * i.e Schema fields.
-	 *
-	 * @since 1.0.19
-	 * @return array
-	 */
-	protected function get_schema_properties() {
-
-		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
-
-		// For back-compat, include any field with an empty schema
-		// because it won't be present in $this->get_item_schema().
-		foreach ( $this->get_additional_fields() as $field_name => $field_options ) {
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
-			}
-		}
-
-		return $properties;
-	}
-
-	/**
-	 * Filters fields by context.
-	 *
-	 * @param array $fields Array of fields
-	 * @param string|null context view, edit or embed
-	 * @since 1.0.19
-	 * @return array
-	 */
-	protected function filter_response_fields_by_context( $fields, $context ) {
-
-		if ( empty( $context ) ) {
-			return $fields;
-		}
-
-		foreach ( $fields as $name => $options ) {
-			if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-				unset( $fields[ $name ] );
-			}
-		}
-
-		return $fields;
-
-	}
-
-	/**
-	 * Filters fields by an array of requested fields.
-	 *
-	 * @param array $fields Array of available fields
-	 * @param array $requested array of requested fields.
-	 * @since 1.0.19
-	 * @return array
-	 */
-	protected function filter_response_fields_by_array( $fields, $requested ) {
-
-		// Trim off any whitespace from the list array.
-		$requested = array_map( 'trim', $requested );
-
-		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
-			$requested[] = 'id';
-		}
-
-		// Get rid of duplicate fields.
-		$requested = array_unique( $requested );
-
-		// Return the list of all included fields which are available.
-		return array_reduce(
-			$requested,
-			function( $response_fields, $field ) use ( $fields ) {
-
-				if ( in_array( $field, $fields, true ) ) {
-					$response_fields[] = $field;
-					return $response_fields;
-				}
-
-				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
-
-				// A nested field is included so long as its top-level property is
-				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
-					$response_fields[] = $field;
-				}
-
-				return $response_fields;
-			},
-			array()
-		);
-
-	}
-
-	/**
-	 * Gets an array of fields to be included on the response.
-	 *
-	 * Included fields are based on item schema and `_fields=` request argument.
-	 * Copied from WordPress 5.3 to support old versions.
-	 *
-	 * @since 1.0.19
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return array Fields to be included in the response.
-	 */
-	public function get_fields_for_response( $request ) {
-
-		// Retrieve fields in the schema.
-		$properties = $this->get_schema_properties();
-
-		// Exclude fields that specify a different context than the request context.
-		$properties = $this->filter_response_fields_by_context( $properties, $request['context'] );
-
-		// We only need the field keys.
-		$fields = array_keys( $properties );
-
-		// Is the user filtering the response fields??
-		if ( empty( $request['_fields'] ) ) {
-			return $fields;
-		}
-
-		return $this->filter_response_fields_by_array( $fields, wpinv_parse_list( $request['_fields'] ) );
-
-	}
-
-	/**
-	 * Limits an object to the requested fields.
-	 *
-	 * Included fields are based on the `_fields` request argument.
-	 *
-	 * @since 1.0.19
-	 * @param array $data Fields to include in the response.
-	 * @param array $fields Requested fields.
-	 * @return array Fields to be included in the response.
-	 */
-	public function limit_object_to_requested_fields( $data, $fields, $prefix = '' ) {
-
-		// Is the user filtering the response fields??
-		if ( empty( $fields ) ) {
-			return $data;
-		}
-
-		foreach ( $data as $key => $value ) {
-
-			// Numeric arrays.
-			if ( is_numeric( $key ) && is_array( $value ) ) {
-				$data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $prefix );
-				continue;
-			}
-
-			// Generate a new prefix.
-			$new_prefix = empty( $prefix ) ? $key : "$prefix.$key";
-
-			// Check if it was requested.
-			if ( ! empty( $key ) && ! $this->is_field_included( $new_prefix, $fields ) ) {
-				unset( $data[ $key ] );
-				continue;
-			}
-
-			if ( $key != 'meta_data' && is_array( $value ) ) {
-				$data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $new_prefix );
-			}
-
-		}
-
-		return $data;
-	}
-
-	/**
-	 * Given an array of fields to include in a response, some of which may be
-	 * `nested.fields`, determine whether the provided field should be included
-	 * in the response body.
-	 *
-	 * Copied from WordPress 5.3 to support old versions.
-	 *
-	 * @since 1.0.19
-	 *
-	 * @param string $field  A field to test for inclusion in the response body.
-	 * @param array  $fields An array of string fields supported by the endpoint.
-	 * @return bool Whether to include the field or not.
-	 * @see rest_is_field_included()
-	 */
-	public function is_field_included( $field, $fields ) {
-		if ( in_array( $field, $fields, true ) ) {
-			return true;
-		}
-
-		foreach ( $fields as $accepted_field ) {
-			// Check to see if $field is the parent of any item in $fields.
-			// A field "parent" should be accepted if "parent.child" is accepted.
-			if ( strpos( $accepted_field, "$field." ) === 0 ) {
-				return true;
-			}
-			// Conversely, if "parent" is accepted, all "parent.child" fields
-			// should also be accepted.
-			if ( strpos( $field, "$accepted_field." ) === 0 ) {
-				return true;
-			}
-		}
-
-		return false;
-	}
+        }
+
+        return $delete;
+
+    }
+
+    /**
+     * Bulk create, update and delete items.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_Error|array.
+     */
+    public function batch_items( $request ) {
+        global $wp_rest_server;
+
+        // Prepare the batch items.
+        $items = $this->fill_batch_keys( array_filter( $request->get_params() ) );
+
+        // Ensure that the batch has not exceeded the limit to prevent abuse.
+        $limit = $this->check_batch_limit( $items );
+        if ( is_wp_error( $limit ) ) {
+            return $limit;
+        }
+
+        // Process the items.
+        return array(
+            'create' => $this->batch_create_items( $items['create'], $request, $wp_rest_server ),
+            'update' => $this->batch_update_items( $items['update'], $request, $wp_rest_server ),
+            'delete' => $this->batch_delete_items( $items['delete'], $wp_rest_server ),
+        );
+
+    }
+
+    /**
+     * Add meta query.
+     *
+     * @since 1.0.19
+     * @param array $args       Query args.
+     * @param array $meta_query Meta query.
+     * @return array
+     */
+    protected function add_meta_query( $args, $meta_query ) {
+        if ( empty( $args['meta_query'] ) ) {
+            $args['meta_query'] = array();
+        }
+
+        $args['meta_query'][] = $meta_query;
+
+        return $args['meta_query'];
+    }
+
+    /**
+     * Get the batch schema, conforming to JSON Schema.
+     *
+     * @return array
+     */
+    public function get_public_batch_schema() {
+
+        return array(
+            '$schema'    => 'http://json-schema.org/draft-04/schema#',
+            'title'      => 'batch',
+            'type'       => 'object',
+            'properties' => array(
+                'create' => array(
+                    'description' => __( 'List of created resources.', 'invoicing' ),
+                    'type'        => 'array',
+                    'context'     => array( 'view', 'edit' ),
+                    'items'       => array(
+                        'type'    => 'object',
+                    ),
+                ),
+                'update' => array(
+                    'description' => __( 'List of updated resources.', 'invoicing' ),
+                    'type'        => 'array',
+                    'context'     => array( 'view', 'edit' ),
+                    'items'       => array(
+                        'type'    => 'object',
+                    ),
+                ),
+                'delete' => array(
+                    'description' => __( 'List of deleted resources.', 'invoicing' ),
+                    'type'        => 'array',
+                    'context'     => array( 'view', 'edit' ),
+                    'items'       => array(
+                        'type'    => 'integer',
+                    ),
+                ),
+            ),
+        );
+
+    }
+
+    /**
+     * Returns the value of schema['properties']
+     * 
+     * i.e Schema fields.
+     *
+     * @since 1.0.19
+     * @return array
+     */
+    protected function get_schema_properties() {
+
+        $schema     = $this->get_item_schema();
+        $properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+
+        // For back-compat, include any field with an empty schema
+        // because it won't be present in $this->get_item_schema().
+        foreach ( $this->get_additional_fields() as $field_name => $field_options ) {
+            if ( is_null( $field_options['schema'] ) ) {
+                $properties[ $field_name ] = $field_options;
+            }
+        }
+
+        return $properties;
+    }
+
+    /**
+     * Filters fields by context.
+     *
+     * @param array $fields Array of fields
+     * @param string|null context view, edit or embed
+     * @since 1.0.19
+     * @return array
+     */
+    protected function filter_response_fields_by_context( $fields, $context ) {
+
+        if ( empty( $context ) ) {
+            return $fields;
+        }
+
+        foreach ( $fields as $name => $options ) {
+            if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
+                unset( $fields[ $name ] );
+            }
+        }
+
+        return $fields;
+
+    }
+
+    /**
+     * Filters fields by an array of requested fields.
+     *
+     * @param array $fields Array of available fields
+     * @param array $requested array of requested fields.
+     * @since 1.0.19
+     * @return array
+     */
+    protected function filter_response_fields_by_array( $fields, $requested ) {
+
+        // Trim off any whitespace from the list array.
+        $requested = array_map( 'trim', $requested );
+
+        // Always persist 'id', because it can be needed for add_additional_fields_to_object().
+        if ( in_array( 'id', $fields, true ) ) {
+            $requested[] = 'id';
+        }
+
+        // Get rid of duplicate fields.
+        $requested = array_unique( $requested );
+
+        // Return the list of all included fields which are available.
+        return array_reduce(
+            $requested,
+            function( $response_fields, $field ) use ( $fields ) {
+
+                if ( in_array( $field, $fields, true ) ) {
+                    $response_fields[] = $field;
+                    return $response_fields;
+                }
+
+                // Check for nested fields if $field is not a direct match.
+                $nested_fields = explode( '.', $field );
+
+                // A nested field is included so long as its top-level property is
+                // present in the schema.
+                if ( in_array( $nested_fields[0], $fields, true ) ) {
+                    $response_fields[] = $field;
+                }
+
+                return $response_fields;
+            },
+            array()
+        );
+
+    }
+
+    /**
+     * Gets an array of fields to be included on the response.
+     *
+     * Included fields are based on item schema and `_fields=` request argument.
+     * Copied from WordPress 5.3 to support old versions.
+     *
+     * @since 1.0.19
+     * @param WP_REST_Request $request Full details about the request.
+     * @return array Fields to be included in the response.
+     */
+    public function get_fields_for_response( $request ) {
+
+        // Retrieve fields in the schema.
+        $properties = $this->get_schema_properties();
+
+        // Exclude fields that specify a different context than the request context.
+        $properties = $this->filter_response_fields_by_context( $properties, $request['context'] );
+
+        // We only need the field keys.
+        $fields = array_keys( $properties );
+
+        // Is the user filtering the response fields??
+        if ( empty( $request['_fields'] ) ) {
+            return $fields;
+        }
+
+        return $this->filter_response_fields_by_array( $fields, wpinv_parse_list( $request['_fields'] ) );
+
+    }
+
+    /**
+     * Limits an object to the requested fields.
+     *
+     * Included fields are based on the `_fields` request argument.
+     *
+     * @since 1.0.19
+     * @param array $data Fields to include in the response.
+     * @param array $fields Requested fields.
+     * @return array Fields to be included in the response.
+     */
+    public function limit_object_to_requested_fields( $data, $fields, $prefix = '' ) {
+
+        // Is the user filtering the response fields??
+        if ( empty( $fields ) ) {
+            return $data;
+        }
+
+        foreach ( $data as $key => $value ) {
+
+            // Numeric arrays.
+            if ( is_numeric( $key ) && is_array( $value ) ) {
+                $data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $prefix );
+                continue;
+            }
+
+            // Generate a new prefix.
+            $new_prefix = empty( $prefix ) ? $key : "$prefix.$key";
+
+            // Check if it was requested.
+            if ( ! empty( $key ) && ! $this->is_field_included( $new_prefix, $fields ) ) {
+                unset( $data[ $key ] );
+                continue;
+            }
+
+            if ( $key != 'meta_data' && is_array( $value ) ) {
+                $data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $new_prefix );
+            }
+
+        }
+
+        return $data;
+    }
+
+    /**
+     * Given an array of fields to include in a response, some of which may be
+     * `nested.fields`, determine whether the provided field should be included
+     * in the response body.
+     *
+     * Copied from WordPress 5.3 to support old versions.
+     *
+     * @since 1.0.19
+     *
+     * @param string $field  A field to test for inclusion in the response body.
+     * @param array  $fields An array of string fields supported by the endpoint.
+     * @return bool Whether to include the field or not.
+     * @see rest_is_field_included()
+     */
+    public function is_field_included( $field, $fields ) {
+        if ( in_array( $field, $fields, true ) ) {
+            return true;
+        }
+
+        foreach ( $fields as $accepted_field ) {
+            // Check to see if $field is the parent of any item in $fields.
+            // A field "parent" should be accepted if "parent.child" is accepted.
+            if ( strpos( $accepted_field, "$field." ) === 0 ) {
+                return true;
+            }
+            // Conversely, if "parent" is accepted, all "parent.child" fields
+            // should also be accepted.
+            if ( strpos( $field, "$accepted_field." ) === 0 ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 
 }

Spacing +96 added lines, -96 removed lines

@@ -8,7 +8,7 @@ 
  * @version 1.0.19
  */
 
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * Core class to access posts via the REST API.
@@ -64,7 +64,7 @@ 
 		);
 
 		// Register REST routes.
-        add_action( 'rest_api_init', array( $this, 'register_routes' ) );
+        add_action('rest_api_init', array($this, 'register_routes'));
 
 	}
 
@@ -76,8 +76,8 @@ 
 	 */
 	public function register_routes() {
 
-		foreach ( $this->namespaces as $namespace ) {
-			$this->register_namespace_routes( $namespace );
+		foreach ($this->namespaces as $namespace) {
+			$this->register_namespace_routes($namespace);
 		}
 
 	}
@@ -89,12 +89,12 @@ 
 	 *
 	 * @param string $namespace
 	 */
-	public function register_namespace_routes( /** @scrutinizer ignore-unused */ $namespace ) {
+	public function register_namespace_routes(/** @scrutinizer ignore-unused */ $namespace) {
 
 		getpaid_doing_it_wrong(
-			__CLASS__ . '::' .__METHOD__,
+			__CLASS__ . '::' . __METHOD__,
 			/* translators: %s: register_namespace_routes() */
-			sprintf( __( "Method '%s' must be overridden." ), __METHOD__ ),
+			sprintf(__("Method '%s' must be overridden."), __METHOD__),
 			'1.0.19'
 		);
 
@@ -106,7 +106,7 @@ 
 	 * @return string
 	 */
 	protected function get_normalized_rest_base() {
-		return preg_replace( '/\(.*\)\//i', '', $this->rest_base );
+		return preg_replace('/\(.*\)\//i', '', $this->rest_base);
 	}
 
 	/**
@@ -115,11 +115,11 @@ 
 	 * @param array array of request items.
 	 * @return array
 	 */
-	protected function fill_batch_keys( $items ) {
+	protected function fill_batch_keys($items) {
 
-		$items['create'] = empty( $items['create'] ) ? array() : $items['create'];
-		$items['update'] = empty( $items['update'] ) ? array() : $items['update'];
-		$items['delete'] = empty( $items['delete'] ) ? array() : wp_parse_id_list( $items['delete'] );
+		$items['create'] = empty($items['create']) ? array() : $items['create'];
+		$items['update'] = empty($items['update']) ? array() : $items['update'];
+		$items['delete'] = empty($items['delete']) ? array() : wp_parse_id_list($items['delete']);
 		return $items;
 
 	}
@@ -130,13 +130,13 @@ 
 	 * @param array $items Request items.
 	 * @return bool|WP_Error
 	 */
-	protected function check_batch_limit( $items ) {
-		$limit = apply_filters( 'getpaid_rest_batch_items_limit', 100, $this->get_normalized_rest_base() );
-		$total = count( $items['create'] ) + count( $items['update'] ) + count( $items['delete'] );
+	protected function check_batch_limit($items) {
+		$limit = apply_filters('getpaid_rest_batch_items_limit', 100, $this->get_normalized_rest_base());
+		$total = count($items['create']) + count($items['update']) + count($items['delete']);
 
-		if ( $total > $limit ) {
+		if ($total > $limit) {
 			/* translators: %s: items limit */
-			return new WP_Error( 'getpaid_rest_request_entity_too_large', sprintf( __( 'Unable to accept more than %s items for this request.', 'invoicing' ), $limit ), array( 'status' => 413 ) );
+			return new WP_Error('getpaid_rest_request_entity_too_large', sprintf(__('Unable to accept more than %s items for this request.', 'invoicing'), $limit), array('status' => 413));
 		}
 
 		return true;
@@ -150,37 +150,37 @@ 
 	 * @param WP_REST_Server $wp_rest_server
 	 * @return array()
 	 */
-	protected function batch_create_items( $items, $request, $wp_rest_server ) {
+	protected function batch_create_items($items, $request, $wp_rest_server) {
 
 		$query  = $request->get_query_params();
 		$create = array();
 
-		foreach ( $items as $item ) {
-			$_item = new WP_REST_Request( 'POST' );
+		foreach ($items as $item) {
+			$_item = new WP_REST_Request('POST');
 
 			// Default parameters.
 			$defaults = array();
 			$schema   = $this->get_public_item_schema();
-			foreach ( $schema['properties'] as $arg => $options ) {
-				if ( isset( $options['default'] ) ) {
-					$defaults[ $arg ] = $options['default'];
+			foreach ($schema['properties'] as $arg => $options) {
+				if (isset($options['default'])) {
+					$defaults[$arg] = $options['default'];
 				}
 			}
-			$_item->set_default_params( $defaults );
+			$_item->set_default_params($defaults);
 
 			// Set request parameters.
-			$_item->set_body_params( $item );
+			$_item->set_body_params($item);
 
 			// Set query (GET) parameters.
-			$_item->set_query_params( $query );
+			$_item->set_query_params($query);
 
 			// Create the item.
-			$_response = $this->create_item( $_item );
+			$_response = $this->create_item($_item);
 
 			// If an error occured...
-			if ( is_wp_error( $_response ) ) {
+			if (is_wp_error($_response)) {
 
-				$create[]   = array(
+				$create[] = array(
 					'id'    => 0,
 					'error' => array(
 						'code'    => $_response->get_error_code(),
@@ -192,7 +192,7 @@ 
 				continue;
 			}
 
-			$create[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
+			$create[] = $wp_rest_server->response_to_data(/** @scrutinizer ignore-type */ $_response, false);
 
 		}
 
@@ -208,27 +208,27 @@ 
 	 * @param WP_REST_Server $wp_rest_server
 	 * @return array()
 	 */
-	protected function batch_update_items( $items, $request, $wp_rest_server ) {
+	protected function batch_update_items($items, $request, $wp_rest_server) {
 
 		$query  = $request->get_query_params();
 		$update = array();
 
-		foreach ( $items as $item ) {
+		foreach ($items as $item) {
 
 			// Create a dummy request.
-			$_item = new WP_REST_Request( 'PUT' );
+			$_item = new WP_REST_Request('PUT');
 
 			// Add body params.
-			$_item->set_body_params( $item );
+			$_item->set_body_params($item);
 
 			// Set query (GET) parameters.
-			$_item->set_query_params( $query );
+			$_item->set_query_params($query);
 
 			// Update the item.
-			$_response = $this->update_item( $_item );
+			$_response = $this->update_item($_item);
 
 			// If an error occured...
-			if ( is_wp_error( $_response ) ) {
+			if (is_wp_error($_response)) {
 
 				$update[] = array(
 					'id'    => $item['id'],
@@ -243,7 +243,7 @@ 
 
 			}
 
-			$update[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
+			$update[] = $wp_rest_server->response_to_data(/** @scrutinizer ignore-type */ $_response, false);
 
 		}
 
@@ -258,14 +258,14 @@ 
 	 * @param WP_REST_Server $wp_rest_server
 	 * @return array()
 	 */
-	protected function batch_delete_items( $items, $wp_rest_server ) {
+	protected function batch_delete_items($items, $wp_rest_server) {
 
 		$delete = array();
 
-		foreach ( array_filter( $items ) as $id ) {
+		foreach (array_filter($items) as $id) {
 
 			// Prepare the request.
-			$_item = new WP_REST_Request( 'DELETE' );
+			$_item = new WP_REST_Request('DELETE');
 			$_item->set_query_params(
 				array(
 					'id'    => $id,
@@ -274,9 +274,9 @@ 
 			);
 
 			// Delete the item.
-			$_response = $this->delete_item( $_item );
+			$_response = $this->delete_item($_item);
 
-			if ( is_wp_error( $_response ) ) {
+			if (is_wp_error($_response)) {
 
 				$delete[] = array(
 					'id'    => $id,
@@ -290,7 +290,7 @@ 
 				continue;
 			}
 
-			$delete[] = $wp_rest_server->response_to_data( /** @scrutinizer ignore-type */ $_response, false );
+			$delete[] = $wp_rest_server->response_to_data(/** @scrutinizer ignore-type */ $_response, false);
 
 		}
 
@@ -304,23 +304,23 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|array.
 	 */
-	public function batch_items( $request ) {
+	public function batch_items($request) {
 		global $wp_rest_server;
 
 		// Prepare the batch items.
-		$items = $this->fill_batch_keys( array_filter( $request->get_params() ) );
+		$items = $this->fill_batch_keys(array_filter($request->get_params()));
 
 		// Ensure that the batch has not exceeded the limit to prevent abuse.
-		$limit = $this->check_batch_limit( $items );
-		if ( is_wp_error( $limit ) ) {
+		$limit = $this->check_batch_limit($items);
+		if (is_wp_error($limit)) {
 			return $limit;
 		}
 
 		// Process the items.
 		return array(
-			'create' => $this->batch_create_items( $items['create'], $request, $wp_rest_server ),
-			'update' => $this->batch_update_items( $items['update'], $request, $wp_rest_server ),
-			'delete' => $this->batch_delete_items( $items['delete'], $wp_rest_server ),
+			'create' => $this->batch_create_items($items['create'], $request, $wp_rest_server),
+			'update' => $this->batch_update_items($items['update'], $request, $wp_rest_server),
+			'delete' => $this->batch_delete_items($items['delete'], $wp_rest_server),
 		);
 
 	}
@@ -333,8 +333,8 @@ 
 	 * @param array $meta_query Meta query.
 	 * @return array
 	 */
-	protected function add_meta_query( $args, $meta_query ) {
-		if ( empty( $args['meta_query'] ) ) {
+	protected function add_meta_query($args, $meta_query) {
+		if (empty($args['meta_query'])) {
 			$args['meta_query'] = array();
 		}
 
@@ -356,25 +356,25 @@ 
 			'type'       => 'object',
 			'properties' => array(
 				'create' => array(
-					'description' => __( 'List of created resources.', 'invoicing' ),
+					'description' => __('List of created resources.', 'invoicing'),
 					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 					'items'       => array(
 						'type'    => 'object',
 					),
 				),
 				'update' => array(
-					'description' => __( 'List of updated resources.', 'invoicing' ),
+					'description' => __('List of updated resources.', 'invoicing'),
 					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 					'items'       => array(
 						'type'    => 'object',
 					),
 				),
 				'delete' => array(
-					'description' => __( 'List of deleted resources.', 'invoicing' ),
+					'description' => __('List of deleted resources.', 'invoicing'),
 					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 					'items'       => array(
 						'type'    => 'integer',
 					),
@@ -395,13 +395,13 @@ 
 	protected function get_schema_properties() {
 
 		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+		$properties = isset($schema['properties']) ? $schema['properties'] : array();
 
 		// For back-compat, include any field with an empty schema
 		// because it won't be present in $this->get_item_schema().
-		foreach ( $this->get_additional_fields() as $field_name => $field_options ) {
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
+		foreach ($this->get_additional_fields() as $field_name => $field_options) {
+			if (is_null($field_options['schema'])) {
+				$properties[$field_name] = $field_options;
 			}
 		}
 
@@ -416,15 +416,15 @@ 
 	 * @since 1.0.19
 	 * @return array
 	 */
-	protected function filter_response_fields_by_context( $fields, $context ) {
+	protected function filter_response_fields_by_context($fields, $context) {
 
-		if ( empty( $context ) ) {
+		if (empty($context)) {
 			return $fields;
 		}
 
-		foreach ( $fields as $name => $options ) {
-			if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-				unset( $fields[ $name ] );
+		foreach ($fields as $name => $options) {
+			if (!empty($options['context']) && !in_array($context, $options['context'], true)) {
+				unset($fields[$name]);
 			}
 		}
 
@@ -440,35 +440,35 @@ 
 	 * @since 1.0.19
 	 * @return array
 	 */
-	protected function filter_response_fields_by_array( $fields, $requested ) {
+	protected function filter_response_fields_by_array($fields, $requested) {
 
 		// Trim off any whitespace from the list array.
-		$requested = array_map( 'trim', $requested );
+		$requested = array_map('trim', $requested);
 
 		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
+		if (in_array('id', $fields, true)) {
 			$requested[] = 'id';
 		}
 
 		// Get rid of duplicate fields.
-		$requested = array_unique( $requested );
+		$requested = array_unique($requested);
 
 		// Return the list of all included fields which are available.
 		return array_reduce(
 			$requested,
-			function( $response_fields, $field ) use ( $fields ) {
+			function($response_fields, $field) use ($fields) {
 
-				if ( in_array( $field, $fields, true ) ) {
+				if (in_array($field, $fields, true)) {
 					$response_fields[] = $field;
 					return $response_fields;
 				}
 
 				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
+				$nested_fields = explode('.', $field);
 
 				// A nested field is included so long as its top-level property is
 				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
+				if (in_array($nested_fields[0], $fields, true)) {
 					$response_fields[] = $field;
 				}
 
@@ -489,23 +489,23 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return array Fields to be included in the response.
 	 */
-	public function get_fields_for_response( $request ) {
+	public function get_fields_for_response($request) {
 
 		// Retrieve fields in the schema.
 		$properties = $this->get_schema_properties();
 
 		// Exclude fields that specify a different context than the request context.
-		$properties = $this->filter_response_fields_by_context( $properties, $request['context'] );
+		$properties = $this->filter_response_fields_by_context($properties, $request['context']);
 
 		// We only need the field keys.
-		$fields = array_keys( $properties );
+		$fields = array_keys($properties);
 
 		// Is the user filtering the response fields??
-		if ( empty( $request['_fields'] ) ) {
+		if (empty($request['_fields'])) {
 			return $fields;
 		}
 
-		return $this->filter_response_fields_by_array( $fields, wpinv_parse_list( $request['_fields'] ) );
+		return $this->filter_response_fields_by_array($fields, wpinv_parse_list($request['_fields']));
 
 	}
 
@@ -519,32 +519,32 @@ 
 	 * @param array $fields Requested fields.
 	 * @return array Fields to be included in the response.
 	 */
-	public function limit_object_to_requested_fields( $data, $fields, $prefix = '' ) {
+	public function limit_object_to_requested_fields($data, $fields, $prefix = '') {
 
 		// Is the user filtering the response fields??
-		if ( empty( $fields ) ) {
+		if (empty($fields)) {
 			return $data;
 		}
 
-		foreach ( $data as $key => $value ) {
+		foreach ($data as $key => $value) {
 
 			// Numeric arrays.
-			if ( is_numeric( $key ) && is_array( $value ) ) {
-				$data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $prefix );
+			if (is_numeric($key) && is_array($value)) {
+				$data[$key] = $this->limit_object_to_requested_fields($value, $fields, $prefix);
 				continue;
 			}
 
 			// Generate a new prefix.
-			$new_prefix = empty( $prefix ) ? $key : "$prefix.$key";
+			$new_prefix = empty($prefix) ? $key : "$prefix.$key";
 
 			// Check if it was requested.
-			if ( ! empty( $key ) && ! $this->is_field_included( $new_prefix, $fields ) ) {
-				unset( $data[ $key ] );
+			if (!empty($key) && !$this->is_field_included($new_prefix, $fields)) {
+				unset($data[$key]);
 				continue;
 			}
 
-			if ( $key != 'meta_data' && is_array( $value ) ) {
-				$data[ $key ] = $this->limit_object_to_requested_fields( $value, $fields, $new_prefix );
+			if ($key != 'meta_data' && is_array($value)) {
+				$data[$key] = $this->limit_object_to_requested_fields($value, $fields, $new_prefix);
 			}
 
 		}
@@ -566,20 +566,20 @@ 
 	 * @return bool Whether to include the field or not.
 	 * @see rest_is_field_included()
 	 */
-	public function is_field_included( $field, $fields ) {
-		if ( in_array( $field, $fields, true ) ) {
+	public function is_field_included($field, $fields) {
+		if (in_array($field, $fields, true)) {
 			return true;
 		}
 
-		foreach ( $fields as $accepted_field ) {
+		foreach ($fields as $accepted_field) {
 			// Check to see if $field is the parent of any item in $fields.
 			// A field "parent" should be accepted if "parent.child" is accepted.
-			if ( strpos( $accepted_field, "$field." ) === 0 ) {
+			if (strpos($accepted_field, "$field.") === 0) {
 				return true;
 			}
 			// Conversely, if "parent" is accepted, all "parent.child" fields
 			// should also be accepted.
-			if ( strpos( $field, "$accepted_field." ) === 0 ) {
+			if (strpos($field, "$accepted_field.") === 0) {
 				return true;
 			}
 		}

includes/api/class-getpaid-rest-posts-controller.php

Indentation +1009 added lines, -1009 removed lines

@@ -18,1018 +18,1018 @@
 class GetPaid_REST_Posts_Controller extends GetPaid_REST_Controller {
 
     /**
-	 * Post type.
-	 *
-	 * @var string
-	 */
-	protected $post_type;
-
-	/**
-	 * Controls visibility on frontend.
-	 *
-	 * @var string
-	 */
-	public $public = false;
-
-	/**
-	 * Contains this controller's class name.
-	 *
-	 * @var string
-	 */
-	public $crud_class;
-
-	/**
-	 * Registers the routes for the objects of the controller.
-	 *
-	 * @since 1.0.19
-	 *
-	 * @see register_rest_route()
-	 */
-	public function register_namespace_routes( $namespace ) {
-
-		register_rest_route(
-			$namespace,
-			'/' . $this->rest_base,
-			array(
-				array(
-					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_items' ),
-					'permission_callback' => array( $this, 'get_items_permissions_check' ),
-					'args'                => $this->get_collection_params(),
-				),
-				array(
-					'methods'             => WP_REST_Server::CREATABLE,
-					'callback'            => array( $this, 'create_item' ),
-					'permission_callback' => array( $this, 'create_item_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
-				),
-				'schema' => array( $this, 'get_public_item_schema' ),
-			)
-		);
-
-		$get_item_args = array(
-			'context' => $this->get_context_param( array( 'default' => 'view' ) ),
-		);
-
-		register_rest_route(
-			$namespace,
-			'/' . $this->rest_base . '/(?P<id>[\d]+)',
-			array(
-				'args'   => array(
-					'id' => array(
-						'description' => __( 'Unique identifier for the object.', 'invoicing' ),
-						'type'        => 'integer',
-					),
-				),
-				array(
-					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_item' ),
-					'permission_callback' => array( $this, 'get_item_permissions_check' ),
-					'args'                => $get_item_args,
-				),
-				array(
-					'methods'             => WP_REST_Server::EDITABLE,
-					'callback'            => array( $this, 'update_item' ),
-					'permission_callback' => array( $this, 'update_item_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
-				),
-				array(
-					'methods'             => WP_REST_Server::DELETABLE,
-					'callback'            => array( $this, 'delete_item' ),
-					'permission_callback' => array( $this, 'delete_item_permissions_check' ),
-					'args'                => array(
-						'force' => array(
-							'type'        => 'boolean',
-							'default'     => false,
-							'description' => __( 'Whether to bypass Trash and force deletion.', 'invoicing' ),
-						),
-					),
-				),
-				'schema' => array( $this, 'get_public_item_schema' ),
-			)
-		);
-
-		register_rest_route(
-			$namespace,
-			'/' . $this->rest_base . '/batch',
-			array(
-				array(
-					'methods'             => WP_REST_Server::EDITABLE,
-					'callback'            => array( $this, 'batch_items' ),
-					'permission_callback' => array( $this, 'batch_items_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
-				),
-				'schema' => array( $this, 'get_public_batch_schema' ),
-			)
-		);
-
-	}
-
-	/**
-	 * Check permissions of items on REST API.
-	 *
-	 * @since 1.0.19
-	 * @param string $context   Request context.
-	 * @param int    $object_id Post ID.
-	 * @return bool
-	 */
-	public function check_post_permissions( $context = 'read', $object_id = 0 ) {
-
-		$contexts = array(
-			'read'   => 'read_private_posts',
-			'create' => 'publish_posts',
-			'edit'   => 'edit_post',
-			'delete' => 'delete_post',
-			'batch'  => 'edit_others_posts',
-		);
-
-		if ( 'revision' === $this->post_type ) {
-			$permission = false;
-		} else {
-			$cap              = $contexts[ $context ];
-			$post_type_object = get_post_type_object( $this->post_type );
-			$permission       = current_user_can( $post_type_object->cap->$cap, $object_id );
-		}
-
-		return apply_filters( 'getpaid_rest_check_permissions', $permission, $context, $object_id, $this->post_type );
-	}
-
-	/**
-	 * Check if a given request has access to read items.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|boolean
-	 */
-	public function get_items_permissions_check( $request ) {
-		return $this->check_post_permissions() ? true : new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot list resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-	}
-
-	/**
-	 * Check if a given request has access to create an item.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|boolean
-	 */
-	public function create_item_permissions_check( $request ) {
-		return $this->check_post_permissions( 'create' ) ? true : new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-	}
-
-	/**
-	 * Check if a given request has access to read an item.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|boolean
-	 */
-	public function get_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
-
-		if ( $post && ! $this->check_post_permissions( 'read', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot view this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Check if a given request has access to update an item.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|boolean
-	 */
-	public function update_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
-
-		if ( $post && ! $this->check_post_permissions( 'edit', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_edit', __( 'Sorry, you are not allowed to edit this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Check if a given request has access to delete an item.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 * @return bool|WP_Error
-	 */
-	public function delete_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
-
-		if ( $post && ! $this->check_post_permissions( 'delete', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_delete', __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Check if a given request has access batch create, update and delete items.
-	 *
-	 * @param  WP_REST_Request $request Full details about the request.
-	 *
-	 * @return boolean|WP_Error
-	 */
-	public function batch_items_permissions_check( $request ) {
-		return $this->check_post_permissions( 'batch' ) ? true : new WP_Error( 'rest_cannot_batch', __( 'Sorry, you are not allowed to batch manipulate this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-	}
-
-	/**
-	 * Saves a single object.
-	 *
-	 * @param GetPaid_Data $object Object to save.
-	 * @return WP_Error|GetPaid_Data
-	 */
-	protected function save_object( $object ) {
-		$object->save();
-
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'rest_cannot_save', $object->last_error, array( 'status' => 400 ) );
-		}
-
-		return new $this->crud_class( $object->get_id() );
-	}
-
-	/**
-	 * Returns the item's object.
-	 *
-	 * Child classes must implement this method.
-	 * @since 1.0.13
-	 *
-	 * @param int|WP_Post $object_id Supplied ID.
-	 * @return GetPaid_Data|WP_Error GetPaid_Data object if ID is valid, WP_Error otherwise.
-	 */
-	protected function get_object( $object_id ) {
-
-		// Do we have an object?
-		if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
-			return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
-		}
-
-		// Fetch the object.
-		$object = new $this->crud_class( $object_id );
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'rest_object_invalid_id', $object->last_error, array( 'status' => 404 ) );
-		}
-
-		return $object->get_id() ? $object : new WP_Error( 'rest_object_invalid_id', __( 'Invalid ID.', 'invoicing' ), array( 'status' => 404 ) );
-
-	}
-
-	/**
-	 * @deprecated
-	 */
-	public function get_post( $object_id ) {
-		return $this->get_object( $object_id );
+     * Post type.
+     *
+     * @var string
+     */
+    protected $post_type;
+
+    /**
+     * Controls visibility on frontend.
+     *
+     * @var string
+     */
+    public $public = false;
+
+    /**
+     * Contains this controller's class name.
+     *
+     * @var string
+     */
+    public $crud_class;
+
+    /**
+     * Registers the routes for the objects of the controller.
+     *
+     * @since 1.0.19
+     *
+     * @see register_rest_route()
+     */
+    public function register_namespace_routes( $namespace ) {
+
+        register_rest_route(
+            $namespace,
+            '/' . $this->rest_base,
+            array(
+                array(
+                    'methods'             => WP_REST_Server::READABLE,
+                    'callback'            => array( $this, 'get_items' ),
+                    'permission_callback' => array( $this, 'get_items_permissions_check' ),
+                    'args'                => $this->get_collection_params(),
+                ),
+                array(
+                    'methods'             => WP_REST_Server::CREATABLE,
+                    'callback'            => array( $this, 'create_item' ),
+                    'permission_callback' => array( $this, 'create_item_permissions_check' ),
+                    'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
+                ),
+                'schema' => array( $this, 'get_public_item_schema' ),
+            )
+        );
+
+        $get_item_args = array(
+            'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+        );
+
+        register_rest_route(
+            $namespace,
+            '/' . $this->rest_base . '/(?P<id>[\d]+)',
+            array(
+                'args'   => array(
+                    'id' => array(
+                        'description' => __( 'Unique identifier for the object.', 'invoicing' ),
+                        'type'        => 'integer',
+                    ),
+                ),
+                array(
+                    'methods'             => WP_REST_Server::READABLE,
+                    'callback'            => array( $this, 'get_item' ),
+                    'permission_callback' => array( $this, 'get_item_permissions_check' ),
+                    'args'                => $get_item_args,
+                ),
+                array(
+                    'methods'             => WP_REST_Server::EDITABLE,
+                    'callback'            => array( $this, 'update_item' ),
+                    'permission_callback' => array( $this, 'update_item_permissions_check' ),
+                    'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
+                ),
+                array(
+                    'methods'             => WP_REST_Server::DELETABLE,
+                    'callback'            => array( $this, 'delete_item' ),
+                    'permission_callback' => array( $this, 'delete_item_permissions_check' ),
+                    'args'                => array(
+                        'force' => array(
+                            'type'        => 'boolean',
+                            'default'     => false,
+                            'description' => __( 'Whether to bypass Trash and force deletion.', 'invoicing' ),
+                        ),
+                    ),
+                ),
+                'schema' => array( $this, 'get_public_item_schema' ),
+            )
+        );
+
+        register_rest_route(
+            $namespace,
+            '/' . $this->rest_base . '/batch',
+            array(
+                array(
+                    'methods'             => WP_REST_Server::EDITABLE,
+                    'callback'            => array( $this, 'batch_items' ),
+                    'permission_callback' => array( $this, 'batch_items_permissions_check' ),
+                    'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
+                ),
+                'schema' => array( $this, 'get_public_batch_schema' ),
+            )
+        );
+
+    }
+
+    /**
+     * Check permissions of items on REST API.
+     *
+     * @since 1.0.19
+     * @param string $context   Request context.
+     * @param int    $object_id Post ID.
+     * @return bool
+     */
+    public function check_post_permissions( $context = 'read', $object_id = 0 ) {
+
+        $contexts = array(
+            'read'   => 'read_private_posts',
+            'create' => 'publish_posts',
+            'edit'   => 'edit_post',
+            'delete' => 'delete_post',
+            'batch'  => 'edit_others_posts',
+        );
+
+        if ( 'revision' === $this->post_type ) {
+            $permission = false;
+        } else {
+            $cap              = $contexts[ $context ];
+            $post_type_object = get_post_type_object( $this->post_type );
+            $permission       = current_user_can( $post_type_object->cap->$cap, $object_id );
+        }
+
+        return apply_filters( 'getpaid_rest_check_permissions', $permission, $context, $object_id, $this->post_type );
+    }
+
+    /**
+     * Check if a given request has access to read items.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     * @return WP_Error|boolean
+     */
+    public function get_items_permissions_check( $request ) {
+        return $this->check_post_permissions() ? true : new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot list resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
     }
 
-	/**
-	 * Get a single object.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|WP_REST_Response
-	 */
-	public function get_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
-
-		// Fetch the item.
-		$object = $this->get_object( $request['id'] );
-
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Generate a response.
-		$data     = $this->prepare_item_for_response( $object, $request );
-		$response = rest_ensure_response( $data );
-
-		// (Maybe) add a link to the html pagee.
-		if ( $this->public && ! is_wp_error( $response ) ) {
-			$response->link_header( 'alternate', get_permalink( $object->get_id() ), array( 'type' => 'text/html' ) );
-		}
-
-		return $response;
-	}
-
-	/**
-	 * Create a single object.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|WP_REST_Response
-	 */
-	public function create_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
-
-		// Can not create an existing item.
-		if ( ! empty( $request['id'] ) ) {
-			/* translators: %s: post type */
-			return new WP_Error( "getpaid_rest_{$this->post_type}_exists", __( 'Cannot create existing resource.', 'invoicing' ), array( 'status' => 400 ) );
-		}
-
-		// Generate a GetPaid_Data object from the request.
-		$object = $this->prepare_item_for_database( $request );
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Save the object.
-		$object = $this->save_object( $object );
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Save special fields.
-		$save_special = $this->update_additional_fields_for_object( $object, $request );
-		if ( is_wp_error( $save_special ) ) {
-			$object->delete( true );
-			return $save_special;
-		}
-
-		/**
-		 * Fires after a single item is created or updated via the REST API.
-		 *
-		 * @param WP_Post         $post      Post object.
-		 * @param WP_REST_Request $request   Request object.
-		 * @param boolean         $creating  True when creating item, false when updating.
-		 */
-		do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, true );
-
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $object, $request );
-		$response = rest_ensure_response( $response );
-		$response->set_status( 201 );
-		$response->header( 'Location', rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ) );
-
-		return $response;
-	}
-
-	/**
-	 * Update a single object.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|WP_REST_Response
-	 */
-	public function update_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
-
-		// Fetch the item.
-		$object = $this->get_object( $request['id'] );
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Prepare the item for saving.
-		$object = $this->prepare_item_for_database( $request );
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Save the item.
-		$object = $this->save_object( $object );
-		if ( is_wp_error( $object ) ) {
-			return $object;
-		}
-
-		// Save special fields (those added via hooks).
-		$save_special = $this->update_additional_fields_for_object( $object, $request );
-		if ( is_wp_error( $save_special ) ) {
-			return $save_special;
-		}
-
-		/**
-		 * Fires after a single item is created or updated via the REST API.
-		 *
-		 * @param GetPaid_Data    $object    GetPaid_Data object.
-		 * @param WP_REST_Request $request   Request object.
-		 * @param boolean         $creating  True when creating item, false when updating.
-		 */
-		do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, false );
-
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $object, $request );
-		return rest_ensure_response( $response );
-	}
-
-	/**
-	 * Get a collection of objects.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_Error|WP_REST_Response
-	 */
-	public function get_items( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
-
-		$args                         = array();
-		$args['offset']               = $request['offset'];
-		$args['order']                = $request['order'];
-		$args['orderby']              = $request['orderby'];
-		$args['paged']                = $request['page'];
-		$args['post__in']             = $request['include'];
-		$args['post__not_in']         = $request['exclude'];
-		$args['posts_per_page']       = $request['per_page'];
-		$args['name']                 = $request['slug'];
-		$args['post_parent__in']      = $request['parent'];
-		$args['post_parent__not_in']  = $request['parent_exclude'];
-		$args['s']                    = $request['search'];
-		$args['post_status']          = wpinv_parse_list( $request['status'] );
-
-		$args['date_query'] = array();
-		// Set before into date query. Date query must be specified as an array of an array.
-		if ( isset( $request['before'] ) ) {
-			$args['date_query'][0]['before'] = $request['before'];
-		}
-
-		// Set after into date query. Date query must be specified as an array of an array.
-		if ( isset( $request['after'] ) ) {
-			$args['date_query'][0]['after'] = $request['after'];
-		}
-
-		// Force the post_type & fields arguments, since they're not a user input variable.
-		$args['post_type'] = $this->post_type;
-		$args['fields']    = 'ids';
-
-		// Filter the query arguments for a request.
-		$args       = apply_filters( "getpaid_rest_{$this->post_type}_query", $args, $request );
-		$query_args = $this->prepare_items_query( $args, $request );
-
-		$posts_query = new WP_Query();
-		$query_result = $posts_query->query( $query_args );
-
-		$posts = array();
-		foreach ( $query_result as $post_id ) {
-			if ( ! $this->check_post_permissions( 'read', $post_id ) ) {
-				continue;
-			}
-
-			$data    = $this->prepare_item_for_response( $this->get_object( $post_id ), $request );
-			$posts[] = $this->prepare_response_for_collection( $data );
-		}
-
-		$page        = (int) $query_args['paged'];
-		$total_posts = $posts_query->found_posts;
-
-		if ( $total_posts < 1 ) {
-			// Out-of-bounds, run the query again without LIMIT for total count.
-			unset( $query_args['paged'] );
-			$count_query = new WP_Query();
-			$count_query->query( $query_args );
-			$total_posts = $count_query->found_posts;
-		}
-
-		$max_pages = ceil( $total_posts / (int) $query_args['posts_per_page'] );
-
-		$response = rest_ensure_response( $posts );
-		$response->header( 'X-WP-Total', (int) $total_posts );
-		$response->header( 'X-WP-TotalPages', (int) $max_pages );
-
-		$request_params = $request->get_query_params();
-		$base = add_query_arg( $request_params, rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
-
-		if ( $page > 1 ) {
-			$prev_page = $page - 1;
-			if ( $prev_page > $max_pages ) {
-				$prev_page = $max_pages;
-			}
-			$prev_link = add_query_arg( 'page', $prev_page, $base );
-			$response->link_header( 'prev', $prev_link );
-		}
-		if ( $max_pages > $page ) {
-			$next_page = $page + 1;
-			$next_link = add_query_arg( 'page', $next_page, $base );
-			$response->link_header( 'next', $next_link );
-		}
-
-		return $response;
-	}
-
-	/**
-	 * Delete a single item.
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error
-	 */
-	public function delete_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
-
-		// Fetch the item.
-		$item = $this->get_object( $request['id'] );
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
-
-		$supports_trash = EMPTY_TRASH_DAYS > 0;
-		$force          = $supports_trash && (bool) $request['force'];
-
-		if ( ! $this->check_post_permissions( 'delete', $item->ID ) ) {
-			return new WP_Error( "cannot_delete", __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
-		}
-
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $item, $request );
-
-		if ( ! wp_delete_post( $item->ID, $force ) ) {
-			return new WP_Error( 'rest_cannot_delete', sprintf( __( 'The resource cannot be deleted.', 'invoicing' ), $this->post_type ), array( 'status' => 500 ) );
-		}
-
-		return $response;
-	}
-
-	/**
-	 * Prepare links for the request.
-	 *
-	 * @param GetPaid_Data    $object GetPaid_Data object.
-	 * @return array Links for the given object.
-	 */
-	protected function prepare_links( $object ) {
-
-		$links = array(
-			'self'       => array(
-				'href'   => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ),
-			),
-			'collection' => array(
-				'href'   => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
-			),
-		);
-
-		if ( is_callable( array( $object, 'get_user_id' ) ) ) {
-			$links['user'] = array(
-				'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_user_id' )  ) ),
-				'embeddable' => true,
-			);
-		}
-
-		if ( is_callable( array( $object, 'get_owner' ) ) ) {
-			$links['owner']  = array(
-				'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_owner' )  ) ),
-				'embeddable' => true,
-			);
-		}
-
-		if ( is_callable( array( $object, 'get_parent_id' ) ) && call_user_func(  array( $object, 'get_parent_id' )  ) ) {
-			$links['parent']  = array(
-				'href'       => rest_url( "$this->namespace/$this->rest_base/" . call_user_func(  array( $object, 'get_parent_id' )  ) ),
-				'embeddable' => true,
-			);
-		}
-
-		return $links;
-	}
-
-	/**
-	 * Determine the allowed query_vars for a get_items() response and
-	 * prepare for WP_Query.
-	 *
-	 * @param array           $prepared_args Prepared arguments.
-	 * @param WP_REST_Request $request Request object.
-	 * @return array          $query_args
-	 */
-	protected function prepare_items_query( $prepared_args = array(), $request = null ) {
-
-		$valid_vars = array_flip( $this->get_allowed_query_vars() );
-		$query_args = array();
-		foreach ( $valid_vars as $var => $index ) {
-			if ( isset( $prepared_args[ $var ] ) ) {
-				$query_args[ $var ] = apply_filters( "getpaid_rest_query_var-{$var}", $prepared_args[ $var ] );
-			}
-		}
-
-		$query_args['ignore_sticky_posts'] = true;
-
-		if ( 'include' === $query_args['orderby'] ) {
-			$query_args['orderby'] = 'post__in';
-		} elseif ( 'id' === $query_args['orderby'] ) {
-			$query_args['orderby'] = 'ID'; // ID must be capitalized.
-		} elseif ( 'slug' === $query_args['orderby'] ) {
-			$query_args['orderby'] = 'name';
-		}
-
-		return apply_filters( 'getpaid_rest_prepare_items_query', $query_args, $request, $this );
-
-	}
-
-	/**
-	 * Get all the WP Query vars that are allowed for the API request.
-	 *
-	 * @return array
-	 */
-	protected function get_allowed_query_vars() {
-		global $wp;
-
-		/**
-		 * Filter the publicly allowed query vars.
-		 *
-		 * Allows adjusting of the default query vars that are made public.
-		 *
-		 * @param array  Array of allowed WP_Query query vars.
-		 */
-		$valid_vars = apply_filters( 'query_vars', $wp->public_query_vars );
-
-		$post_type_obj = get_post_type_object( $this->post_type );
-		if ( current_user_can( $post_type_obj->cap->edit_posts ) ) {
-			$private = apply_filters( 'getpaid_rest_private_query_vars', $wp->private_query_vars );
-			$valid_vars = array_merge( $valid_vars, $private );
-		}
-
-		// Define our own in addition to WP's normal vars.
-		$rest_valid = array(
-			'post_status',
-			'date_query',
-			'ignore_sticky_posts',
-			'offset',
-			'post__in',
-			'post__not_in',
-			'post_parent',
-			'post_parent__in',
-			'post_parent__not_in',
-			'posts_per_page',
-			'meta_query',
-			'tax_query',
-			'meta_key',
-			'meta_value',
-			'meta_compare',
-			'meta_value_num',
-		);
-		$valid_vars = array_merge( $valid_vars, $rest_valid );
-
-		// Filter allowed query vars for the REST API.
-		$valid_vars = apply_filters( 'getpaid_rest_query_vars', $valid_vars, $this );
-
-		return $valid_vars;
-	}
-
-	/**
-	 * Get the query params for collections of attachments.
-	 *
-	 * @return array
-	 */
-	public function get_collection_params() {
-		$params = parent::get_collection_params();
-
-		$params['context']['default'] = 'view';
-
-		$params['status'] = array(
-			'default'           => $this->get_post_statuses(),
-			'description'       => __( 'Limit result set to resources assigned one or more statuses.', 'invoicing' ),
-			'type'              => array( 'array', 'string' ),
-			'items'             => array(
-				'enum'          => $this->get_post_statuses(),
-				'type'          => 'string',
-			),
-			'validate_callback' => 'rest_validate_request_arg',
-			'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
-		);
-
-		$params['after'] = array(
-			'description'        => __( 'Limit response to resources created after a given ISO8601 compliant date.', 'invoicing' ),
-			'type'               => 'string',
-			'format'             => 'string',
-			'validate_callback'  => 'rest_validate_request_arg',
-			'sanitize_callback'  => 'sanitize_text_field',
-		);
-		$params['before'] = array(
-			'description'        => __( 'Limit response to resources created before a given ISO8601 compliant date.', 'invoicing' ),
-			'type'               => 'string',
-			'format'             => 'string',
-			'validate_callback'  => 'rest_validate_request_arg',
-			'sanitize_callback'  => 'sanitize_text_field',
-		);
-		$params['exclude'] = array(
-			'description'       => __( 'Ensure result set excludes specific IDs.', 'invoicing' ),
-			'type'              => 'array',
-			'items'             => array(
-				'type'          => 'integer',
-			),
-			'default'           => array(),
-			'sanitize_callback' => 'wp_parse_id_list',
-			'validate_callback' => 'rest_validate_request_arg',
-		);
-		$params['include'] = array(
-			'description'       => __( 'Limit result set to specific ids.', 'invoicing' ),
-			'type'              => 'array',
-			'items'             => array(
-				'type'          => 'integer',
-			),
-			'default'           => array(),
-			'sanitize_callback' => 'wp_parse_id_list',
-			'validate_callback' => 'rest_validate_request_arg',
-		);
-		$params['offset'] = array(
-			'description'        => __( 'Offset the result set by a specific number of items.', 'invoicing' ),
-			'type'               => 'integer',
-			'sanitize_callback'  => 'absint',
-			'validate_callback'  => 'rest_validate_request_arg',
-		);
-		$params['order'] = array(
-			'description'        => __( 'Order sort attribute ascending or descending.', 'invoicing' ),
-			'type'               => 'string',
-			'default'            => 'desc',
-			'enum'               => array( 'asc', 'desc' ),
-			'validate_callback'  => 'rest_validate_request_arg',
-		);
-		$params['orderby'] = array(
-			'description'        => __( 'Sort collection by object attribute.', 'invoicing' ),
-			'type'               => 'string',
-			'default'            => 'date',
-			'enum'               => array(
-				'date',
-				'id',
-				'include',
-				'title',
-				'slug',
-				'modified',
-			),
-			'validate_callback'  => 'rest_validate_request_arg',
-		);
-
-		$post_type_obj = get_post_type_object( $this->post_type );
-
-		if ( isset( $post_type_obj->hierarchical ) && $post_type_obj->hierarchical ) {
-			$params['parent'] = array(
-				'description'       => __( 'Limit result set to those of particular parent IDs.', 'invoicing' ),
-				'type'              => 'array',
-				'items'             => array(
-					'type'          => 'integer',
-				),
-				'sanitize_callback' => 'wp_parse_id_list',
-				'default'           => array(),
-			);
-			$params['parent_exclude'] = array(
-				'description'       => __( 'Limit result set to all items except those of a particular parent ID.', 'invoicing' ),
-				'type'              => 'array',
-				'items'             => array(
-					'type'          => 'integer',
-				),
-				'sanitize_callback' => 'wp_parse_id_list',
-				'default'           => array(),
-			);
-		}
-
-		return $params;
-	}
-
-	/**
-	 * Retrieves the items's schema, conforming to JSON Schema.
-	 *
-	 * @since 1.0.19
-	 *
-	 * @return array Item schema data.
-	 */
-	public function get_item_schema() {
-
-		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
-		}
-
-		$type   = str_replace( 'wpi_', '', $this->post_type );
-		$schema = array(
-			'$schema'    => 'http://json-schema.org/draft-04/schema#',
-			'title'      => $this->post_type,
-			'type'       => 'object',
-			'properties' => wpinv_get_data( "$type-schema" ),
-		);
-
-		// Filters the invoice schema for the REST API.
+    /**
+     * Check if a given request has access to create an item.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     * @return WP_Error|boolean
+     */
+    public function create_item_permissions_check( $request ) {
+        return $this->check_post_permissions( 'create' ) ? true : new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+    }
+
+    /**
+     * Check if a given request has access to read an item.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     * @return WP_Error|boolean
+     */
+    public function get_item_permissions_check( $request ) {
+        $post = get_post( (int) $request['id'] );
+
+        if ( $post && ! $this->check_post_permissions( 'read', $post->ID ) ) {
+            return new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot view this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        }
+
+        return true;
+    }
+
+    /**
+     * Check if a given request has access to update an item.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     * @return WP_Error|boolean
+     */
+    public function update_item_permissions_check( $request ) {
+        $post = get_post( (int) $request['id'] );
+
+        if ( $post && ! $this->check_post_permissions( 'edit', $post->ID ) ) {
+            return new WP_Error( 'rest_cannot_edit', __( 'Sorry, you are not allowed to edit this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        }
+
+        return true;
+    }
+
+    /**
+     * Check if a given request has access to delete an item.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     * @return bool|WP_Error
+     */
+    public function delete_item_permissions_check( $request ) {
+        $post = get_post( (int) $request['id'] );
+
+        if ( $post && ! $this->check_post_permissions( 'delete', $post->ID ) ) {
+            return new WP_Error( 'rest_cannot_delete', __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        }
+
+        return true;
+    }
+
+    /**
+     * Check if a given request has access batch create, update and delete items.
+     *
+     * @param  WP_REST_Request $request Full details about the request.
+     *
+     * @return boolean|WP_Error
+     */
+    public function batch_items_permissions_check( $request ) {
+        return $this->check_post_permissions( 'batch' ) ? true : new WP_Error( 'rest_cannot_batch', __( 'Sorry, you are not allowed to batch manipulate this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+    }
+
+    /**
+     * Saves a single object.
+     *
+     * @param GetPaid_Data $object Object to save.
+     * @return WP_Error|GetPaid_Data
+     */
+    protected function save_object( $object ) {
+        $object->save();
+
+        if ( ! empty( $object->last_error ) ) {
+            return new WP_Error( 'rest_cannot_save', $object->last_error, array( 'status' => 400 ) );
+        }
+
+        return new $this->crud_class( $object->get_id() );
+    }
+
+    /**
+     * Returns the item's object.
+     *
+     * Child classes must implement this method.
+     * @since 1.0.13
+     *
+     * @param int|WP_Post $object_id Supplied ID.
+     * @return GetPaid_Data|WP_Error GetPaid_Data object if ID is valid, WP_Error otherwise.
+     */
+    protected function get_object( $object_id ) {
+
+        // Do we have an object?
+        if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
+            return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
+        }
+
+        // Fetch the object.
+        $object = new $this->crud_class( $object_id );
+        if ( ! empty( $object->last_error ) ) {
+            return new WP_Error( 'rest_object_invalid_id', $object->last_error, array( 'status' => 404 ) );
+        }
+
+        return $object->get_id() ? $object : new WP_Error( 'rest_object_invalid_id', __( 'Invalid ID.', 'invoicing' ), array( 'status' => 404 ) );
+
+    }
+
+    /**
+     * @deprecated
+     */
+    public function get_post( $object_id ) {
+        return $this->get_object( $object_id );
+    }
+
+    /**
+     * Get a single object.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_Error|WP_REST_Response
+     */
+    public function get_item( $request ) {
+        remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+
+        // Fetch the item.
+        $object = $this->get_object( $request['id'] );
+
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Generate a response.
+        $data     = $this->prepare_item_for_response( $object, $request );
+        $response = rest_ensure_response( $data );
+
+        // (Maybe) add a link to the html pagee.
+        if ( $this->public && ! is_wp_error( $response ) ) {
+            $response->link_header( 'alternate', get_permalink( $object->get_id() ), array( 'type' => 'text/html' ) );
+        }
+
+        return $response;
+    }
+
+    /**
+     * Create a single object.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_Error|WP_REST_Response
+     */
+    public function create_item( $request ) {
+        remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+
+        // Can not create an existing item.
+        if ( ! empty( $request['id'] ) ) {
+            /* translators: %s: post type */
+            return new WP_Error( "getpaid_rest_{$this->post_type}_exists", __( 'Cannot create existing resource.', 'invoicing' ), array( 'status' => 400 ) );
+        }
+
+        // Generate a GetPaid_Data object from the request.
+        $object = $this->prepare_item_for_database( $request );
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Save the object.
+        $object = $this->save_object( $object );
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Save special fields.
+        $save_special = $this->update_additional_fields_for_object( $object, $request );
+        if ( is_wp_error( $save_special ) ) {
+            $object->delete( true );
+            return $save_special;
+        }
+
+        /**
+         * Fires after a single item is created or updated via the REST API.
+         *
+         * @param WP_Post         $post      Post object.
+         * @param WP_REST_Request $request   Request object.
+         * @param boolean         $creating  True when creating item, false when updating.
+         */
+        do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, true );
+
+        $request->set_param( 'context', 'edit' );
+        $response = $this->prepare_item_for_response( $object, $request );
+        $response = rest_ensure_response( $response );
+        $response->set_status( 201 );
+        $response->header( 'Location', rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ) );
+
+        return $response;
+    }
+
+    /**
+     * Update a single object.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_Error|WP_REST_Response
+     */
+    public function update_item( $request ) {
+        remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+
+        // Fetch the item.
+        $object = $this->get_object( $request['id'] );
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Prepare the item for saving.
+        $object = $this->prepare_item_for_database( $request );
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Save the item.
+        $object = $this->save_object( $object );
+        if ( is_wp_error( $object ) ) {
+            return $object;
+        }
+
+        // Save special fields (those added via hooks).
+        $save_special = $this->update_additional_fields_for_object( $object, $request );
+        if ( is_wp_error( $save_special ) ) {
+            return $save_special;
+        }
+
+        /**
+         * Fires after a single item is created or updated via the REST API.
+         *
+         * @param GetPaid_Data    $object    GetPaid_Data object.
+         * @param WP_REST_Request $request   Request object.
+         * @param boolean         $creating  True when creating item, false when updating.
+         */
+        do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, false );
+
+        $request->set_param( 'context', 'edit' );
+        $response = $this->prepare_item_for_response( $object, $request );
+        return rest_ensure_response( $response );
+    }
+
+    /**
+     * Get a collection of objects.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_Error|WP_REST_Response
+     */
+    public function get_items( $request ) {
+        remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+
+        $args                         = array();
+        $args['offset']               = $request['offset'];
+        $args['order']                = $request['order'];
+        $args['orderby']              = $request['orderby'];
+        $args['paged']                = $request['page'];
+        $args['post__in']             = $request['include'];
+        $args['post__not_in']         = $request['exclude'];
+        $args['posts_per_page']       = $request['per_page'];
+        $args['name']                 = $request['slug'];
+        $args['post_parent__in']      = $request['parent'];
+        $args['post_parent__not_in']  = $request['parent_exclude'];
+        $args['s']                    = $request['search'];
+        $args['post_status']          = wpinv_parse_list( $request['status'] );
+
+        $args['date_query'] = array();
+        // Set before into date query. Date query must be specified as an array of an array.
+        if ( isset( $request['before'] ) ) {
+            $args['date_query'][0]['before'] = $request['before'];
+        }
+
+        // Set after into date query. Date query must be specified as an array of an array.
+        if ( isset( $request['after'] ) ) {
+            $args['date_query'][0]['after'] = $request['after'];
+        }
+
+        // Force the post_type & fields arguments, since they're not a user input variable.
+        $args['post_type'] = $this->post_type;
+        $args['fields']    = 'ids';
+
+        // Filter the query arguments for a request.
+        $args       = apply_filters( "getpaid_rest_{$this->post_type}_query", $args, $request );
+        $query_args = $this->prepare_items_query( $args, $request );
+
+        $posts_query = new WP_Query();
+        $query_result = $posts_query->query( $query_args );
+
+        $posts = array();
+        foreach ( $query_result as $post_id ) {
+            if ( ! $this->check_post_permissions( 'read', $post_id ) ) {
+                continue;
+            }
+
+            $data    = $this->prepare_item_for_response( $this->get_object( $post_id ), $request );
+            $posts[] = $this->prepare_response_for_collection( $data );
+        }
+
+        $page        = (int) $query_args['paged'];
+        $total_posts = $posts_query->found_posts;
+
+        if ( $total_posts < 1 ) {
+            // Out-of-bounds, run the query again without LIMIT for total count.
+            unset( $query_args['paged'] );
+            $count_query = new WP_Query();
+            $count_query->query( $query_args );
+            $total_posts = $count_query->found_posts;
+        }
+
+        $max_pages = ceil( $total_posts / (int) $query_args['posts_per_page'] );
+
+        $response = rest_ensure_response( $posts );
+        $response->header( 'X-WP-Total', (int) $total_posts );
+        $response->header( 'X-WP-TotalPages', (int) $max_pages );
+
+        $request_params = $request->get_query_params();
+        $base = add_query_arg( $request_params, rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+
+        if ( $page > 1 ) {
+            $prev_page = $page - 1;
+            if ( $prev_page > $max_pages ) {
+                $prev_page = $max_pages;
+            }
+            $prev_link = add_query_arg( 'page', $prev_page, $base );
+            $response->link_header( 'prev', $prev_link );
+        }
+        if ( $max_pages > $page ) {
+            $next_page = $page + 1;
+            $next_link = add_query_arg( 'page', $next_page, $base );
+            $response->link_header( 'next', $next_link );
+        }
+
+        return $response;
+    }
+
+    /**
+     * Delete a single item.
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error
+     */
+    public function delete_item( $request ) {
+        remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+
+        // Fetch the item.
+        $item = $this->get_object( $request['id'] );
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
+
+        $supports_trash = EMPTY_TRASH_DAYS > 0;
+        $force          = $supports_trash && (bool) $request['force'];
+
+        if ( ! $this->check_post_permissions( 'delete', $item->ID ) ) {
+            return new WP_Error( "cannot_delete", __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        }
+
+        $request->set_param( 'context', 'edit' );
+        $response = $this->prepare_item_for_response( $item, $request );
+
+        if ( ! wp_delete_post( $item->ID, $force ) ) {
+            return new WP_Error( 'rest_cannot_delete', sprintf( __( 'The resource cannot be deleted.', 'invoicing' ), $this->post_type ), array( 'status' => 500 ) );
+        }
+
+        return $response;
+    }
+
+    /**
+     * Prepare links for the request.
+     *
+     * @param GetPaid_Data    $object GetPaid_Data object.
+     * @return array Links for the given object.
+     */
+    protected function prepare_links( $object ) {
+
+        $links = array(
+            'self'       => array(
+                'href'   => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ),
+            ),
+            'collection' => array(
+                'href'   => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
+            ),
+        );
+
+        if ( is_callable( array( $object, 'get_user_id' ) ) ) {
+            $links['user'] = array(
+                'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_user_id' )  ) ),
+                'embeddable' => true,
+            );
+        }
+
+        if ( is_callable( array( $object, 'get_owner' ) ) ) {
+            $links['owner']  = array(
+                'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_owner' )  ) ),
+                'embeddable' => true,
+            );
+        }
+
+        if ( is_callable( array( $object, 'get_parent_id' ) ) && call_user_func(  array( $object, 'get_parent_id' )  ) ) {
+            $links['parent']  = array(
+                'href'       => rest_url( "$this->namespace/$this->rest_base/" . call_user_func(  array( $object, 'get_parent_id' )  ) ),
+                'embeddable' => true,
+            );
+        }
+
+        return $links;
+    }
+
+    /**
+     * Determine the allowed query_vars for a get_items() response and
+     * prepare for WP_Query.
+     *
+     * @param array           $prepared_args Prepared arguments.
+     * @param WP_REST_Request $request Request object.
+     * @return array          $query_args
+     */
+    protected function prepare_items_query( $prepared_args = array(), $request = null ) {
+
+        $valid_vars = array_flip( $this->get_allowed_query_vars() );
+        $query_args = array();
+        foreach ( $valid_vars as $var => $index ) {
+            if ( isset( $prepared_args[ $var ] ) ) {
+                $query_args[ $var ] = apply_filters( "getpaid_rest_query_var-{$var}", $prepared_args[ $var ] );
+            }
+        }
+
+        $query_args['ignore_sticky_posts'] = true;
+
+        if ( 'include' === $query_args['orderby'] ) {
+            $query_args['orderby'] = 'post__in';
+        } elseif ( 'id' === $query_args['orderby'] ) {
+            $query_args['orderby'] = 'ID'; // ID must be capitalized.
+        } elseif ( 'slug' === $query_args['orderby'] ) {
+            $query_args['orderby'] = 'name';
+        }
+
+        return apply_filters( 'getpaid_rest_prepare_items_query', $query_args, $request, $this );
+
+    }
+
+    /**
+     * Get all the WP Query vars that are allowed for the API request.
+     *
+     * @return array
+     */
+    protected function get_allowed_query_vars() {
+        global $wp;
+
+        /**
+         * Filter the publicly allowed query vars.
+         *
+         * Allows adjusting of the default query vars that are made public.
+         *
+         * @param array  Array of allowed WP_Query query vars.
+         */
+        $valid_vars = apply_filters( 'query_vars', $wp->public_query_vars );
+
+        $post_type_obj = get_post_type_object( $this->post_type );
+        if ( current_user_can( $post_type_obj->cap->edit_posts ) ) {
+            $private = apply_filters( 'getpaid_rest_private_query_vars', $wp->private_query_vars );
+            $valid_vars = array_merge( $valid_vars, $private );
+        }
+
+        // Define our own in addition to WP's normal vars.
+        $rest_valid = array(
+            'post_status',
+            'date_query',
+            'ignore_sticky_posts',
+            'offset',
+            'post__in',
+            'post__not_in',
+            'post_parent',
+            'post_parent__in',
+            'post_parent__not_in',
+            'posts_per_page',
+            'meta_query',
+            'tax_query',
+            'meta_key',
+            'meta_value',
+            'meta_compare',
+            'meta_value_num',
+        );
+        $valid_vars = array_merge( $valid_vars, $rest_valid );
+
+        // Filter allowed query vars for the REST API.
+        $valid_vars = apply_filters( 'getpaid_rest_query_vars', $valid_vars, $this );
+
+        return $valid_vars;
+    }
+
+    /**
+     * Get the query params for collections of attachments.
+     *
+     * @return array
+     */
+    public function get_collection_params() {
+        $params = parent::get_collection_params();
+
+        $params['context']['default'] = 'view';
+
+        $params['status'] = array(
+            'default'           => $this->get_post_statuses(),
+            'description'       => __( 'Limit result set to resources assigned one or more statuses.', 'invoicing' ),
+            'type'              => array( 'array', 'string' ),
+            'items'             => array(
+                'enum'          => $this->get_post_statuses(),
+                'type'          => 'string',
+            ),
+            'validate_callback' => 'rest_validate_request_arg',
+            'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
+        );
+
+        $params['after'] = array(
+            'description'        => __( 'Limit response to resources created after a given ISO8601 compliant date.', 'invoicing' ),
+            'type'               => 'string',
+            'format'             => 'string',
+            'validate_callback'  => 'rest_validate_request_arg',
+            'sanitize_callback'  => 'sanitize_text_field',
+        );
+        $params['before'] = array(
+            'description'        => __( 'Limit response to resources created before a given ISO8601 compliant date.', 'invoicing' ),
+            'type'               => 'string',
+            'format'             => 'string',
+            'validate_callback'  => 'rest_validate_request_arg',
+            'sanitize_callback'  => 'sanitize_text_field',
+        );
+        $params['exclude'] = array(
+            'description'       => __( 'Ensure result set excludes specific IDs.', 'invoicing' ),
+            'type'              => 'array',
+            'items'             => array(
+                'type'          => 'integer',
+            ),
+            'default'           => array(),
+            'sanitize_callback' => 'wp_parse_id_list',
+            'validate_callback' => 'rest_validate_request_arg',
+        );
+        $params['include'] = array(
+            'description'       => __( 'Limit result set to specific ids.', 'invoicing' ),
+            'type'              => 'array',
+            'items'             => array(
+                'type'          => 'integer',
+            ),
+            'default'           => array(),
+            'sanitize_callback' => 'wp_parse_id_list',
+            'validate_callback' => 'rest_validate_request_arg',
+        );
+        $params['offset'] = array(
+            'description'        => __( 'Offset the result set by a specific number of items.', 'invoicing' ),
+            'type'               => 'integer',
+            'sanitize_callback'  => 'absint',
+            'validate_callback'  => 'rest_validate_request_arg',
+        );
+        $params['order'] = array(
+            'description'        => __( 'Order sort attribute ascending or descending.', 'invoicing' ),
+            'type'               => 'string',
+            'default'            => 'desc',
+            'enum'               => array( 'asc', 'desc' ),
+            'validate_callback'  => 'rest_validate_request_arg',
+        );
+        $params['orderby'] = array(
+            'description'        => __( 'Sort collection by object attribute.', 'invoicing' ),
+            'type'               => 'string',
+            'default'            => 'date',
+            'enum'               => array(
+                'date',
+                'id',
+                'include',
+                'title',
+                'slug',
+                'modified',
+            ),
+            'validate_callback'  => 'rest_validate_request_arg',
+        );
+
+        $post_type_obj = get_post_type_object( $this->post_type );
+
+        if ( isset( $post_type_obj->hierarchical ) && $post_type_obj->hierarchical ) {
+            $params['parent'] = array(
+                'description'       => __( 'Limit result set to those of particular parent IDs.', 'invoicing' ),
+                'type'              => 'array',
+                'items'             => array(
+                    'type'          => 'integer',
+                ),
+                'sanitize_callback' => 'wp_parse_id_list',
+                'default'           => array(),
+            );
+            $params['parent_exclude'] = array(
+                'description'       => __( 'Limit result set to all items except those of a particular parent ID.', 'invoicing' ),
+                'type'              => 'array',
+                'items'             => array(
+                    'type'          => 'integer',
+                ),
+                'sanitize_callback' => 'wp_parse_id_list',
+                'default'           => array(),
+            );
+        }
+
+        return $params;
+    }
+
+    /**
+     * Retrieves the items's schema, conforming to JSON Schema.
+     *
+     * @since 1.0.19
+     *
+     * @return array Item schema data.
+     */
+    public function get_item_schema() {
+
+        // Maybe retrieve the schema from cache.
+        if ( $this->schema ) {
+            return $this->add_additional_fields_schema( $this->schema );
+        }
+
+        $type   = str_replace( 'wpi_', '', $this->post_type );
+        $schema = array(
+            '$schema'    => 'http://json-schema.org/draft-04/schema#',
+            'title'      => $this->post_type,
+            'type'       => 'object',
+            'properties' => wpinv_get_data( "$type-schema" ),
+        );
+
+        // Filters the invoice schema for the REST API.
         $schema = apply_filters( "wpinv_rest_{$type}_schema", $schema );
 
-		// Cache the invoice schema.
-		$this->schema = $schema;
-
-		return $this->add_additional_fields_schema( $this->schema );
-	}
-
-	/**
-	 * Only return writable props from schema.
-	 *
-	 * @param  array $schema Schema.
-	 * @return bool
-	 */
-	public function filter_writable_props( $schema ) {
-		return empty( $schema['readonly'] );
-	}
-
-	/**
-	 * Sanitizes and validates the list of post statuses.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param string|array    $statuses  One or more post statuses.
-	 * @param WP_REST_Request $request   Full details about the request.
-	 * @param string          $parameter Additional parameter to pass to validation.
-	 * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
-	 */
-	public function sanitize_post_statuses( $statuses, $request, $parameter ) {
-		return array_intersect( wp_parse_slug_list( $statuses ), $this->get_post_statuses() );
-	}
-
-	/**
-	 * Retrieves a valid list of post statuses.
-	 *
-	 * @since 1.0.19
-	 *
-	 * @return array A list of registered item statuses.
-	 */
-	public function get_post_statuses() {
-		return get_post_stati();
-	}
-
-	/**
-	 * Prepare a single object for create or update.
-	 *
-	 * @since 1.0.19
-	 * @param  WP_REST_Request $request Request object.
-	 * @return GetPaid_Data|WP_Error Data object or WP_Error.
-	 */
-	protected function prepare_item_for_database( $request ) {
-
-		// Do we have an object?
-		if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
-			return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
-		}
-
-		// Prepare the object.
-		$id        = isset( $request['id'] ) ? absint( $request['id'] ) : 0;
-		$object    = new $this->crud_class( $id );
-
-		// Abort if an error exists.
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'invalid_item', $object->last_error );
-		}
-
-		$schema    = $this->get_item_schema();
-		$data_keys = array_keys( array_filter( $schema['properties'], array( $this, 'filter_writable_props' ) ) );
-
-		// Handle all writable props.
-		foreach ( $data_keys as $key ) {
-			$value = $request[ $key ];
-
-			if ( ! is_null( $value ) ) {
-				switch ( $key ) {
-
-					case 'meta_data':
-						if ( is_array( $value ) ) {
-							foreach ( $value as $meta ) {
-								$object->update_meta_data( $meta['key'], $meta['value'], isset( $meta['id'] ) ? $meta['id'] : '' );
-							}
-						}
-						break;
-
-					default:
-						if ( is_callable( array( $object, "set_{$key}" ) ) ) {
-							$object->{"set_{$key}"}( $value );
-						}
-						break;
-				}
-			}
-
-		}
-
-		// Filters an object before it is inserted via the REST API..
-		return apply_filters( "getpaid_rest_pre_insert_{$this->post_type}_object", $object, $request );
-	}
-
-	/**
-	 * Retrieves data from a GetPaid class.
-	 *
-	 * @since  1.0.19
-	 * @param  GetPaid_Meta_Data[]    $meta_data  meta data objects.
-	 * @return array
-	 */
-	protected function prepare_object_meta_data( $meta_data ) {
-		$meta = array();
-
-		foreach( $meta_data as $object ) {
-			$meta[] = $object->get_data();
-		}
-
-		return $meta;
-	}
-
-	/**
-	 * Retrieves invoice items.
-	 *
-	 * @since  1.0.19
-	 * @param  WPInv_Invoice $invoice  Invoice items.
-	 * @param array            $fields Fields to include.
-	 * @return array
-	 */
-	protected function prepare_invoice_items( $invoice ) {
-		$items = array();
-
-		foreach( $invoice->get_items() as $item ) {
-
-			$item_data = $item->prepare_data_for_saving();
-
-			if ( 'amount' == $invoice->get_template() ) {
-				$item_data['quantity'] = 1;
-			}
-
-			$items[] = $item_data;
-		}
-
-		return $items;
-	}
-
-	/**
-	 * Retrieves data from a GetPaid class.
-	 *
-	 * @since  1.0.19
-	 * @param  GetPaid_Data    $object  Data object.
-	 * @param array            $fields Fields to include.
-	 * @param string           $context either view or edit.
-	 * @return array
-	 */
-	protected function prepare_object_data( $object, $fields, $context = 'view' ) {
-
-		$data = array();
-
-		// Handle all writable props.
-		foreach ( array_keys( $this->get_schema_properties() ) as $key ) {
-
-			// Abort if it is not included.
-			if ( ! empty( $fields ) && ! $this->is_field_included( $key, $fields ) ) {
-				continue;
-			}
-
-			// Or this current object does not support the field.
-			if ( ! $this->object_supports_field( $object, $key ) ) {
-				continue;
-			}
-
-			// Handle meta data.
-			if ( $key == 'meta_data' ) {
-				$data['meta_data'] = $this->prepare_object_meta_data( $object->get_meta_data() );
-				continue;
-			}
-
-			// Handle items.
-			if ( $key == 'items' && is_a( $object, 'WPInv_Invoice' )  ) {
-				$data['items'] = $this->prepare_invoice_items( $object );
-				continue;
-			}
-
-			// Booleans.
-			if ( is_callable( array( $object, $key ) ) ) {
-				$data[ $key ] = $object->$key( $context );
-				continue;
-			}
-
-			// Get object value.
-			if ( is_callable( array( $object, "get_{$key}" ) ) ) {
-				$value = $object->{"get_{$key}"}( $context );
-
-				// If the value is an instance of GetPaid_Data...
-				if ( is_a( $value, 'GetPaid_Data' ) ) {
-					$value = $value->get_data( $context );
-				}
-
-				// For objects, retrieves it's properties.
-				$data[ $key ] = is_object( $value ) ? get_object_vars( $value ) :  $value ;
-				continue;
-			}
-
-		}
-
-		return $data;
-	}
-
-	/**
-	 * Checks if a key should be included in a response.
-	 *
-	 * @since  1.0.19
-	 * @param  GetPaid_Data $object  Data object.
-	 * @param  string       $field_key The key to check for.
-	 * @return bool
-	 */
-	public function object_supports_field( $object, $field_key ) {
-		return apply_filters( "getpaid_rest_{$this->post_type}_object_supports_key", true, $object, $field_key );
-	}
-
-	/**
-	 * Prepare a single object output for response.
-	 *
-	 * @since  1.0.19
-	 * @param  GetPaid_Data    $object  Data object.
-	 * @param  WP_REST_Request $request Request object.
-	 * @return WP_REST_Response
-	 */
-	public function prepare_item_for_response( $object, $request ) {
-
-		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
-
-		// Prepare object data.
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->prepare_object_data( $object, $fields, $context );
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->limit_object_to_requested_fields( $data, $fields );
-		$data    = $this->filter_response_by_context( $data, $context );
-
-		// Prepare the response.
-		$response = rest_ensure_response( $data );
-		$response->add_links( $this->prepare_links( $object, $request ) );
-
-		// Filter item response.
-		return apply_filters( "getpaid_rest_prepare_{$this->post_type}_object", $response, $object, $request );
-	}
+        // Cache the invoice schema.
+        $this->schema = $schema;
+
+        return $this->add_additional_fields_schema( $this->schema );
+    }
+
+    /**
+     * Only return writable props from schema.
+     *
+     * @param  array $schema Schema.
+     * @return bool
+     */
+    public function filter_writable_props( $schema ) {
+        return empty( $schema['readonly'] );
+    }
+
+    /**
+     * Sanitizes and validates the list of post statuses.
+     *
+     * @since 1.0.13
+     *
+     * @param string|array    $statuses  One or more post statuses.
+     * @param WP_REST_Request $request   Full details about the request.
+     * @param string          $parameter Additional parameter to pass to validation.
+     * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
+     */
+    public function sanitize_post_statuses( $statuses, $request, $parameter ) {
+        return array_intersect( wp_parse_slug_list( $statuses ), $this->get_post_statuses() );
+    }
+
+    /**
+     * Retrieves a valid list of post statuses.
+     *
+     * @since 1.0.19
+     *
+     * @return array A list of registered item statuses.
+     */
+    public function get_post_statuses() {
+        return get_post_stati();
+    }
+
+    /**
+     * Prepare a single object for create or update.
+     *
+     * @since 1.0.19
+     * @param  WP_REST_Request $request Request object.
+     * @return GetPaid_Data|WP_Error Data object or WP_Error.
+     */
+    protected function prepare_item_for_database( $request ) {
+
+        // Do we have an object?
+        if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
+            return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
+        }
+
+        // Prepare the object.
+        $id        = isset( $request['id'] ) ? absint( $request['id'] ) : 0;
+        $object    = new $this->crud_class( $id );
+
+        // Abort if an error exists.
+        if ( ! empty( $object->last_error ) ) {
+            return new WP_Error( 'invalid_item', $object->last_error );
+        }
+
+        $schema    = $this->get_item_schema();
+        $data_keys = array_keys( array_filter( $schema['properties'], array( $this, 'filter_writable_props' ) ) );
+
+        // Handle all writable props.
+        foreach ( $data_keys as $key ) {
+            $value = $request[ $key ];
+
+            if ( ! is_null( $value ) ) {
+                switch ( $key ) {
+
+                    case 'meta_data':
+                        if ( is_array( $value ) ) {
+                            foreach ( $value as $meta ) {
+                                $object->update_meta_data( $meta['key'], $meta['value'], isset( $meta['id'] ) ? $meta['id'] : '' );
+                            }
+                        }
+                        break;
+
+                    default:
+                        if ( is_callable( array( $object, "set_{$key}" ) ) ) {
+                            $object->{"set_{$key}"}( $value );
+                        }
+                        break;
+                }
+            }
+
+        }
+
+        // Filters an object before it is inserted via the REST API..
+        return apply_filters( "getpaid_rest_pre_insert_{$this->post_type}_object", $object, $request );
+    }
+
+    /**
+     * Retrieves data from a GetPaid class.
+     *
+     * @since  1.0.19
+     * @param  GetPaid_Meta_Data[]    $meta_data  meta data objects.
+     * @return array
+     */
+    protected function prepare_object_meta_data( $meta_data ) {
+        $meta = array();
+
+        foreach( $meta_data as $object ) {
+            $meta[] = $object->get_data();
+        }
+
+        return $meta;
+    }
+
+    /**
+     * Retrieves invoice items.
+     *
+     * @since  1.0.19
+     * @param  WPInv_Invoice $invoice  Invoice items.
+     * @param array            $fields Fields to include.
+     * @return array
+     */
+    protected function prepare_invoice_items( $invoice ) {
+        $items = array();
+
+        foreach( $invoice->get_items() as $item ) {
+
+            $item_data = $item->prepare_data_for_saving();
+
+            if ( 'amount' == $invoice->get_template() ) {
+                $item_data['quantity'] = 1;
+            }
+
+            $items[] = $item_data;
+        }
+
+        return $items;
+    }
+
+    /**
+     * Retrieves data from a GetPaid class.
+     *
+     * @since  1.0.19
+     * @param  GetPaid_Data    $object  Data object.
+     * @param array            $fields Fields to include.
+     * @param string           $context either view or edit.
+     * @return array
+     */
+    protected function prepare_object_data( $object, $fields, $context = 'view' ) {
+
+        $data = array();
+
+        // Handle all writable props.
+        foreach ( array_keys( $this->get_schema_properties() ) as $key ) {
+
+            // Abort if it is not included.
+            if ( ! empty( $fields ) && ! $this->is_field_included( $key, $fields ) ) {
+                continue;
+            }
+
+            // Or this current object does not support the field.
+            if ( ! $this->object_supports_field( $object, $key ) ) {
+                continue;
+            }
+
+            // Handle meta data.
+            if ( $key == 'meta_data' ) {
+                $data['meta_data'] = $this->prepare_object_meta_data( $object->get_meta_data() );
+                continue;
+            }
+
+            // Handle items.
+            if ( $key == 'items' && is_a( $object, 'WPInv_Invoice' )  ) {
+                $data['items'] = $this->prepare_invoice_items( $object );
+                continue;
+            }
+
+            // Booleans.
+            if ( is_callable( array( $object, $key ) ) ) {
+                $data[ $key ] = $object->$key( $context );
+                continue;
+            }
+
+            // Get object value.
+            if ( is_callable( array( $object, "get_{$key}" ) ) ) {
+                $value = $object->{"get_{$key}"}( $context );
+
+                // If the value is an instance of GetPaid_Data...
+                if ( is_a( $value, 'GetPaid_Data' ) ) {
+                    $value = $value->get_data( $context );
+                }
+
+                // For objects, retrieves it's properties.
+                $data[ $key ] = is_object( $value ) ? get_object_vars( $value ) :  $value ;
+                continue;
+            }
+
+        }
+
+        return $data;
+    }
+
+    /**
+     * Checks if a key should be included in a response.
+     *
+     * @since  1.0.19
+     * @param  GetPaid_Data $object  Data object.
+     * @param  string       $field_key The key to check for.
+     * @return bool
+     */
+    public function object_supports_field( $object, $field_key ) {
+        return apply_filters( "getpaid_rest_{$this->post_type}_object_supports_key", true, $object, $field_key );
+    }
+
+    /**
+     * Prepare a single object output for response.
+     *
+     * @since  1.0.19
+     * @param  GetPaid_Data    $object  Data object.
+     * @param  WP_REST_Request $request Request object.
+     * @return WP_REST_Response
+     */
+    public function prepare_item_for_response( $object, $request ) {
+
+        // Fetch the fields to include in this response.
+        $fields = $this->get_fields_for_response( $request );
+
+        // Prepare object data.
+        $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+        $data    = $this->prepare_object_data( $object, $fields, $context );
+        $data    = $this->add_additional_fields_to_object( $data, $request );
+        $data    = $this->limit_object_to_requested_fields( $data, $fields );
+        $data    = $this->filter_response_by_context( $data, $context );
+
+        // Prepare the response.
+        $response = rest_ensure_response( $data );
+        $response->add_links( $this->prepare_links( $object, $request ) );
+
+        // Filter item response.
+        return apply_filters( "getpaid_rest_prepare_{$this->post_type}_object", $response, $object, $request );
+    }
 
 }

Spacing +238 added lines, -238 removed lines

@@ -8,7 +8,7 @@ 
  * @version 1.0.19
  */
 
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * GetPaid REST Posts controller class.
@@ -45,7 +45,7 @@ 
 	 *
 	 * @see register_rest_route()
 	 */
-	public function register_namespace_routes( $namespace ) {
+	public function register_namespace_routes($namespace) {
 
 		register_rest_route(
 			$namespace,
@@ -53,22 +53,22 @@ 
 			array(
 				array(
 					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_items' ),
-					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'callback'            => array($this, 'get_items'),
+					'permission_callback' => array($this, 'get_items_permissions_check'),
 					'args'                => $this->get_collection_params(),
 				),
 				array(
 					'methods'             => WP_REST_Server::CREATABLE,
-					'callback'            => array( $this, 'create_item' ),
-					'permission_callback' => array( $this, 'create_item_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
+					'callback'            => array($this, 'create_item'),
+					'permission_callback' => array($this, 'create_item_permissions_check'),
+					'args'                => $this->get_endpoint_args_for_item_schema(WP_REST_Server::CREATABLE),
 				),
-				'schema' => array( $this, 'get_public_item_schema' ),
+				'schema' => array($this, 'get_public_item_schema'),
 			)
 		);
 
 		$get_item_args = array(
-			'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+			'context' => $this->get_context_param(array('default' => 'view')),
 		);
 
 		register_rest_route(
@@ -77,35 +77,35 @@ 
 			array(
 				'args'   => array(
 					'id' => array(
-						'description' => __( 'Unique identifier for the object.', 'invoicing' ),
+						'description' => __('Unique identifier for the object.', 'invoicing'),
 						'type'        => 'integer',
 					),
 				),
 				array(
 					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_item' ),
-					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+					'callback'            => array($this, 'get_item'),
+					'permission_callback' => array($this, 'get_item_permissions_check'),
 					'args'                => $get_item_args,
 				),
 				array(
 					'methods'             => WP_REST_Server::EDITABLE,
-					'callback'            => array( $this, 'update_item' ),
-					'permission_callback' => array( $this, 'update_item_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
+					'callback'            => array($this, 'update_item'),
+					'permission_callback' => array($this, 'update_item_permissions_check'),
+					'args'                => $this->get_endpoint_args_for_item_schema(WP_REST_Server::EDITABLE),
 				),
 				array(
 					'methods'             => WP_REST_Server::DELETABLE,
-					'callback'            => array( $this, 'delete_item' ),
-					'permission_callback' => array( $this, 'delete_item_permissions_check' ),
+					'callback'            => array($this, 'delete_item'),
+					'permission_callback' => array($this, 'delete_item_permissions_check'),
 					'args'                => array(
 						'force' => array(
 							'type'        => 'boolean',
 							'default'     => false,
-							'description' => __( 'Whether to bypass Trash and force deletion.', 'invoicing' ),
+							'description' => __('Whether to bypass Trash and force deletion.', 'invoicing'),
 						),
 					),
 				),
-				'schema' => array( $this, 'get_public_item_schema' ),
+				'schema' => array($this, 'get_public_item_schema'),
 			)
 		);
 
@@ -115,11 +115,11 @@ 
 			array(
 				array(
 					'methods'             => WP_REST_Server::EDITABLE,
-					'callback'            => array( $this, 'batch_items' ),
-					'permission_callback' => array( $this, 'batch_items_permissions_check' ),
-					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
+					'callback'            => array($this, 'batch_items'),
+					'permission_callback' => array($this, 'batch_items_permissions_check'),
+					'args'                => $this->get_endpoint_args_for_item_schema(WP_REST_Server::EDITABLE),
 				),
-				'schema' => array( $this, 'get_public_batch_schema' ),
+				'schema' => array($this, 'get_public_batch_schema'),
 			)
 		);
 
@@ -133,7 +133,7 @@ 
 	 * @param int    $object_id Post ID.
 	 * @return bool
 	 */
-	public function check_post_permissions( $context = 'read', $object_id = 0 ) {
+	public function check_post_permissions($context = 'read', $object_id = 0) {
 
 		$contexts = array(
 			'read'   => 'read_private_posts',
@@ -143,15 +143,15 @@ 
 			'batch'  => 'edit_others_posts',
 		);
 
-		if ( 'revision' === $this->post_type ) {
+		if ('revision' === $this->post_type) {
 			$permission = false;
 		} else {
-			$cap              = $contexts[ $context ];
-			$post_type_object = get_post_type_object( $this->post_type );
-			$permission       = current_user_can( $post_type_object->cap->$cap, $object_id );
+			$cap              = $contexts[$context];
+			$post_type_object = get_post_type_object($this->post_type);
+			$permission       = current_user_can($post_type_object->cap->$cap, $object_id);
 		}
 
-		return apply_filters( 'getpaid_rest_check_permissions', $permission, $context, $object_id, $this->post_type );
+		return apply_filters('getpaid_rest_check_permissions', $permission, $context, $object_id, $this->post_type);
 	}
 
 	/**
@@ -160,8 +160,8 @@ 
 	 * @param  WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|boolean
 	 */
-	public function get_items_permissions_check( $request ) {
-		return $this->check_post_permissions() ? true : new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot list resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+	public function get_items_permissions_check($request) {
+		return $this->check_post_permissions() ? true : new WP_Error('rest_cannot_view', __('Sorry, you cannot list resources.', 'invoicing'), array('status' => rest_authorization_required_code()));
 	}
 
 	/**
@@ -170,8 +170,8 @@ 
 	 * @param  WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|boolean
 	 */
-	public function create_item_permissions_check( $request ) {
-		return $this->check_post_permissions( 'create' ) ? true : new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create resources.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+	public function create_item_permissions_check($request) {
+		return $this->check_post_permissions('create') ? true : new WP_Error('rest_cannot_create', __('Sorry, you are not allowed to create resources.', 'invoicing'), array('status' => rest_authorization_required_code()));
 	}
 
 	/**
@@ -180,11 +180,11 @@ 
 	 * @param  WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|boolean
 	 */
-	public function get_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
+	public function get_item_permissions_check($request) {
+		$post = get_post((int) $request['id']);
 
-		if ( $post && ! $this->check_post_permissions( 'read', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_view', __( 'Sorry, you cannot view this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		if ($post && !$this->check_post_permissions('read', $post->ID)) {
+			return new WP_Error('rest_cannot_view', __('Sorry, you cannot view this resource.', 'invoicing'), array('status' => rest_authorization_required_code()));
 		}
 
 		return true;
@@ -196,11 +196,11 @@ 
 	 * @param  WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|boolean
 	 */
-	public function update_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
+	public function update_item_permissions_check($request) {
+		$post = get_post((int) $request['id']);
 
-		if ( $post && ! $this->check_post_permissions( 'edit', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_edit', __( 'Sorry, you are not allowed to edit this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		if ($post && !$this->check_post_permissions('edit', $post->ID)) {
+			return new WP_Error('rest_cannot_edit', __('Sorry, you are not allowed to edit this resource.', 'invoicing'), array('status' => rest_authorization_required_code()));
 		}
 
 		return true;
@@ -212,11 +212,11 @@ 
 	 * @param  WP_REST_Request $request Full details about the request.
 	 * @return bool|WP_Error
 	 */
-	public function delete_item_permissions_check( $request ) {
-		$post = get_post( (int) $request['id'] );
+	public function delete_item_permissions_check($request) {
+		$post = get_post((int) $request['id']);
 
-		if ( $post && ! $this->check_post_permissions( 'delete', $post->ID ) ) {
-			return new WP_Error( 'rest_cannot_delete', __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		if ($post && !$this->check_post_permissions('delete', $post->ID)) {
+			return new WP_Error('rest_cannot_delete', __('Sorry, you are not allowed to delete this resource.', 'invoicing'), array('status' => rest_authorization_required_code()));
 		}
 
 		return true;
@@ -229,8 +229,8 @@ 
 	 *
 	 * @return boolean|WP_Error
 	 */
-	public function batch_items_permissions_check( $request ) {
-		return $this->check_post_permissions( 'batch' ) ? true : new WP_Error( 'rest_cannot_batch', __( 'Sorry, you are not allowed to batch manipulate this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+	public function batch_items_permissions_check($request) {
+		return $this->check_post_permissions('batch') ? true : new WP_Error('rest_cannot_batch', __('Sorry, you are not allowed to batch manipulate this resource.', 'invoicing'), array('status' => rest_authorization_required_code()));
 	}
 
 	/**
@@ -239,14 +239,14 @@ 
 	 * @param GetPaid_Data $object Object to save.
 	 * @return WP_Error|GetPaid_Data
 	 */
-	protected function save_object( $object ) {
+	protected function save_object($object) {
 		$object->save();
 
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'rest_cannot_save', $object->last_error, array( 'status' => 400 ) );
+		if (!empty($object->last_error)) {
+			return new WP_Error('rest_cannot_save', $object->last_error, array('status' => 400));
 		}
 
-		return new $this->crud_class( $object->get_id() );
+		return new $this->crud_class($object->get_id());
 	}
 
 	/**
@@ -258,28 +258,28 @@ 
 	 * @param int|WP_Post $object_id Supplied ID.
 	 * @return GetPaid_Data|WP_Error GetPaid_Data object if ID is valid, WP_Error otherwise.
 	 */
-	protected function get_object( $object_id ) {
+	protected function get_object($object_id) {
 
 		// Do we have an object?
-		if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
-			return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
+		if (empty($this->crud_class) || !class_exists($this->crud_class)) {
+			return new WP_Error('no_crud_class', __('You need to specify a CRUD class for this controller', 'invoicing'));
 		}
 
 		// Fetch the object.
-		$object = new $this->crud_class( $object_id );
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'rest_object_invalid_id', $object->last_error, array( 'status' => 404 ) );
+		$object = new $this->crud_class($object_id);
+		if (!empty($object->last_error)) {
+			return new WP_Error('rest_object_invalid_id', $object->last_error, array('status' => 404));
 		}
 
-		return $object->get_id() ? $object : new WP_Error( 'rest_object_invalid_id', __( 'Invalid ID.', 'invoicing' ), array( 'status' => 404 ) );
+		return $object->get_id() ? $object : new WP_Error('rest_object_invalid_id', __('Invalid ID.', 'invoicing'), array('status' => 404));
 
 	}
 
 	/**
 	 * @deprecated
 	 */
-	public function get_post( $object_id ) {
-		return $this->get_object( $object_id );
+	public function get_post($object_id) {
+		return $this->get_object($object_id);
     }
 
 	/**
@@ -288,23 +288,23 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|WP_REST_Response
 	 */
-	public function get_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+	public function get_item($request) {
+		remove_filter('rest_post_dispatch', 'rest_filter_response_fields', 10, 3);
 
 		// Fetch the item.
-		$object = $this->get_object( $request['id'] );
+		$object = $this->get_object($request['id']);
 
-		if ( is_wp_error( $object ) ) {
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Generate a response.
-		$data     = $this->prepare_item_for_response( $object, $request );
-		$response = rest_ensure_response( $data );
+		$data     = $this->prepare_item_for_response($object, $request);
+		$response = rest_ensure_response($data);
 
 		// (Maybe) add a link to the html pagee.
-		if ( $this->public && ! is_wp_error( $response ) ) {
-			$response->link_header( 'alternate', get_permalink( $object->get_id() ), array( 'type' => 'text/html' ) );
+		if ($this->public && !is_wp_error($response)) {
+			$response->link_header('alternate', get_permalink($object->get_id()), array('type' => 'text/html'));
 		}
 
 		return $response;
@@ -316,31 +316,31 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|WP_REST_Response
 	 */
-	public function create_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+	public function create_item($request) {
+		remove_filter('rest_post_dispatch', 'rest_filter_response_fields', 10, 3);
 
 		// Can not create an existing item.
-		if ( ! empty( $request['id'] ) ) {
+		if (!empty($request['id'])) {
 			/* translators: %s: post type */
-			return new WP_Error( "getpaid_rest_{$this->post_type}_exists", __( 'Cannot create existing resource.', 'invoicing' ), array( 'status' => 400 ) );
+			return new WP_Error("getpaid_rest_{$this->post_type}_exists", __('Cannot create existing resource.', 'invoicing'), array('status' => 400));
 		}
 
 		// Generate a GetPaid_Data object from the request.
-		$object = $this->prepare_item_for_database( $request );
-		if ( is_wp_error( $object ) ) {
+		$object = $this->prepare_item_for_database($request);
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Save the object.
-		$object = $this->save_object( $object );
-		if ( is_wp_error( $object ) ) {
+		$object = $this->save_object($object);
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Save special fields.
-		$save_special = $this->update_additional_fields_for_object( $object, $request );
-		if ( is_wp_error( $save_special ) ) {
-			$object->delete( true );
+		$save_special = $this->update_additional_fields_for_object($object, $request);
+		if (is_wp_error($save_special)) {
+			$object->delete(true);
 			return $save_special;
 		}
 
@@ -351,13 +351,13 @@ 
 		 * @param WP_REST_Request $request   Request object.
 		 * @param boolean         $creating  True when creating item, false when updating.
 		 */
-		do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, true );
+		do_action("getpaid_rest_insert_{$this->post_type}", $object, $request, true);
 
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $object, $request );
-		$response = rest_ensure_response( $response );
-		$response->set_status( 201 );
-		$response->header( 'Location', rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ) );
+		$request->set_param('context', 'edit');
+		$response = $this->prepare_item_for_response($object, $request);
+		$response = rest_ensure_response($response);
+		$response->set_status(201);
+		$response->header('Location', rest_url(sprintf('/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id())));
 
 		return $response;
 	}
@@ -368,30 +368,30 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|WP_REST_Response
 	 */
-	public function update_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+	public function update_item($request) {
+		remove_filter('rest_post_dispatch', 'rest_filter_response_fields', 10, 3);
 
 		// Fetch the item.
-		$object = $this->get_object( $request['id'] );
-		if ( is_wp_error( $object ) ) {
+		$object = $this->get_object($request['id']);
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Prepare the item for saving.
-		$object = $this->prepare_item_for_database( $request );
-		if ( is_wp_error( $object ) ) {
+		$object = $this->prepare_item_for_database($request);
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Save the item.
-		$object = $this->save_object( $object );
-		if ( is_wp_error( $object ) ) {
+		$object = $this->save_object($object);
+		if (is_wp_error($object)) {
 			return $object;
 		}
 
 		// Save special fields (those added via hooks).
-		$save_special = $this->update_additional_fields_for_object( $object, $request );
-		if ( is_wp_error( $save_special ) ) {
+		$save_special = $this->update_additional_fields_for_object($object, $request);
+		if (is_wp_error($save_special)) {
 			return $save_special;
 		}
 
@@ -402,11 +402,11 @@ 
 		 * @param WP_REST_Request $request   Request object.
 		 * @param boolean         $creating  True when creating item, false when updating.
 		 */
-		do_action( "getpaid_rest_insert_{$this->post_type}", $object, $request, false );
+		do_action("getpaid_rest_insert_{$this->post_type}", $object, $request, false);
 
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $object, $request );
-		return rest_ensure_response( $response );
+		$request->set_param('context', 'edit');
+		$response = $this->prepare_item_for_response($object, $request);
+		return rest_ensure_response($response);
 	}
 
 	/**
@@ -415,8 +415,8 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_Error|WP_REST_Response
 	 */
-	public function get_items( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+	public function get_items($request) {
+		remove_filter('rest_post_dispatch', 'rest_filter_response_fields', 10, 3);
 
 		$args                         = array();
 		$args['offset']               = $request['offset'];
@@ -430,16 +430,16 @@ 
 		$args['post_parent__in']      = $request['parent'];
 		$args['post_parent__not_in']  = $request['parent_exclude'];
 		$args['s']                    = $request['search'];
-		$args['post_status']          = wpinv_parse_list( $request['status'] );
+		$args['post_status']          = wpinv_parse_list($request['status']);
 
 		$args['date_query'] = array();
 		// Set before into date query. Date query must be specified as an array of an array.
-		if ( isset( $request['before'] ) ) {
+		if (isset($request['before'])) {
 			$args['date_query'][0]['before'] = $request['before'];
 		}
 
 		// Set after into date query. Date query must be specified as an array of an array.
-		if ( isset( $request['after'] ) ) {
+		if (isset($request['after'])) {
 			$args['date_query'][0]['after'] = $request['after'];
 		}
 
@@ -448,54 +448,54 @@ 
 		$args['fields']    = 'ids';
 
 		// Filter the query arguments for a request.
-		$args       = apply_filters( "getpaid_rest_{$this->post_type}_query", $args, $request );
-		$query_args = $this->prepare_items_query( $args, $request );
+		$args       = apply_filters("getpaid_rest_{$this->post_type}_query", $args, $request);
+		$query_args = $this->prepare_items_query($args, $request);
 
 		$posts_query = new WP_Query();
-		$query_result = $posts_query->query( $query_args );
+		$query_result = $posts_query->query($query_args);
 
 		$posts = array();
-		foreach ( $query_result as $post_id ) {
-			if ( ! $this->check_post_permissions( 'read', $post_id ) ) {
+		foreach ($query_result as $post_id) {
+			if (!$this->check_post_permissions('read', $post_id)) {
 				continue;
 			}
 
-			$data    = $this->prepare_item_for_response( $this->get_object( $post_id ), $request );
-			$posts[] = $this->prepare_response_for_collection( $data );
+			$data    = $this->prepare_item_for_response($this->get_object($post_id), $request);
+			$posts[] = $this->prepare_response_for_collection($data);
 		}
 
 		$page        = (int) $query_args['paged'];
 		$total_posts = $posts_query->found_posts;
 
-		if ( $total_posts < 1 ) {
+		if ($total_posts < 1) {
 			// Out-of-bounds, run the query again without LIMIT for total count.
-			unset( $query_args['paged'] );
+			unset($query_args['paged']);
 			$count_query = new WP_Query();
-			$count_query->query( $query_args );
+			$count_query->query($query_args);
 			$total_posts = $count_query->found_posts;
 		}
 
-		$max_pages = ceil( $total_posts / (int) $query_args['posts_per_page'] );
+		$max_pages = ceil($total_posts / (int) $query_args['posts_per_page']);
 
-		$response = rest_ensure_response( $posts );
-		$response->header( 'X-WP-Total', (int) $total_posts );
-		$response->header( 'X-WP-TotalPages', (int) $max_pages );
+		$response = rest_ensure_response($posts);
+		$response->header('X-WP-Total', (int) $total_posts);
+		$response->header('X-WP-TotalPages', (int) $max_pages);
 
 		$request_params = $request->get_query_params();
-		$base = add_query_arg( $request_params, rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		$base = add_query_arg($request_params, rest_url(sprintf('/%s/%s', $this->namespace, $this->rest_base)));
 
-		if ( $page > 1 ) {
+		if ($page > 1) {
 			$prev_page = $page - 1;
-			if ( $prev_page > $max_pages ) {
+			if ($prev_page > $max_pages) {
 				$prev_page = $max_pages;
 			}
-			$prev_link = add_query_arg( 'page', $prev_page, $base );
-			$response->link_header( 'prev', $prev_link );
+			$prev_link = add_query_arg('page', $prev_page, $base);
+			$response->link_header('prev', $prev_link);
 		}
-		if ( $max_pages > $page ) {
+		if ($max_pages > $page) {
 			$next_page = $page + 1;
-			$next_link = add_query_arg( 'page', $next_page, $base );
-			$response->link_header( 'next', $next_link );
+			$next_link = add_query_arg('page', $next_page, $base);
+			$response->link_header('next', $next_link);
 		}
 
 		return $response;
@@ -507,27 +507,27 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error
 	 */
-	public function delete_item( $request ) {
-		remove_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );
+	public function delete_item($request) {
+		remove_filter('rest_post_dispatch', 'rest_filter_response_fields', 10, 3);
 
 		// Fetch the item.
-		$item = $this->get_object( $request['id'] );
-		if ( is_wp_error( $item ) ) {
+		$item = $this->get_object($request['id']);
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
 		$supports_trash = EMPTY_TRASH_DAYS > 0;
 		$force          = $supports_trash && (bool) $request['force'];
 
-		if ( ! $this->check_post_permissions( 'delete', $item->ID ) ) {
-			return new WP_Error( "cannot_delete", __( 'Sorry, you are not allowed to delete this resource.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		if (!$this->check_post_permissions('delete', $item->ID)) {
+			return new WP_Error("cannot_delete", __('Sorry, you are not allowed to delete this resource.', 'invoicing'), array('status' => rest_authorization_required_code()));
 		}
 
-		$request->set_param( 'context', 'edit' );
-		$response = $this->prepare_item_for_response( $item, $request );
+		$request->set_param('context', 'edit');
+		$response = $this->prepare_item_for_response($item, $request);
 
-		if ( ! wp_delete_post( $item->ID, $force ) ) {
-			return new WP_Error( 'rest_cannot_delete', sprintf( __( 'The resource cannot be deleted.', 'invoicing' ), $this->post_type ), array( 'status' => 500 ) );
+		if (!wp_delete_post($item->ID, $force)) {
+			return new WP_Error('rest_cannot_delete', sprintf(__('The resource cannot be deleted.', 'invoicing'), $this->post_type), array('status' => 500));
 		}
 
 		return $response;
@@ -539,34 +539,34 @@ 
 	 * @param GetPaid_Data    $object GetPaid_Data object.
 	 * @return array Links for the given object.
 	 */
-	protected function prepare_links( $object ) {
+	protected function prepare_links($object) {
 
 		$links = array(
 			'self'       => array(
-				'href'   => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id() ) ),
+				'href'   => rest_url(sprintf('/%s/%s/%d', $this->namespace, $this->rest_base, $object->get_id())),
 			),
 			'collection' => array(
-				'href'   => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
+				'href'   => rest_url(sprintf('/%s/%s', $this->namespace, $this->rest_base)),
 			),
 		);
 
-		if ( is_callable( array( $object, 'get_user_id' ) ) ) {
+		if (is_callable(array($object, 'get_user_id'))) {
 			$links['user'] = array(
-				'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_user_id' )  ) ),
+				'href'       => rest_url('wp/v2/users/' . call_user_func(array($object, 'get_user_id'))),
 				'embeddable' => true,
 			);
 		}
 
-		if ( is_callable( array( $object, 'get_owner' ) ) ) {
-			$links['owner']  = array(
-				'href'       => rest_url( 'wp/v2/users/' . call_user_func(  array( $object, 'get_owner' )  ) ),
+		if (is_callable(array($object, 'get_owner'))) {
+			$links['owner'] = array(
+				'href'       => rest_url('wp/v2/users/' . call_user_func(array($object, 'get_owner'))),
 				'embeddable' => true,
 			);
 		}
 
-		if ( is_callable( array( $object, 'get_parent_id' ) ) && call_user_func(  array( $object, 'get_parent_id' )  ) ) {
-			$links['parent']  = array(
-				'href'       => rest_url( "$this->namespace/$this->rest_base/" . call_user_func(  array( $object, 'get_parent_id' )  ) ),
+		if (is_callable(array($object, 'get_parent_id')) && call_user_func(array($object, 'get_parent_id'))) {
+			$links['parent'] = array(
+				'href'       => rest_url("$this->namespace/$this->rest_base/" . call_user_func(array($object, 'get_parent_id'))),
 				'embeddable' => true,
 			);
 		}
@@ -582,27 +582,27 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return array          $query_args
 	 */
-	protected function prepare_items_query( $prepared_args = array(), $request = null ) {
+	protected function prepare_items_query($prepared_args = array(), $request = null) {
 
-		$valid_vars = array_flip( $this->get_allowed_query_vars() );
+		$valid_vars = array_flip($this->get_allowed_query_vars());
 		$query_args = array();
-		foreach ( $valid_vars as $var => $index ) {
-			if ( isset( $prepared_args[ $var ] ) ) {
-				$query_args[ $var ] = apply_filters( "getpaid_rest_query_var-{$var}", $prepared_args[ $var ] );
+		foreach ($valid_vars as $var => $index) {
+			if (isset($prepared_args[$var])) {
+				$query_args[$var] = apply_filters("getpaid_rest_query_var-{$var}", $prepared_args[$var]);
 			}
 		}
 
 		$query_args['ignore_sticky_posts'] = true;
 
-		if ( 'include' === $query_args['orderby'] ) {
+		if ('include' === $query_args['orderby']) {
 			$query_args['orderby'] = 'post__in';
-		} elseif ( 'id' === $query_args['orderby'] ) {
+		} elseif ('id' === $query_args['orderby']) {
 			$query_args['orderby'] = 'ID'; // ID must be capitalized.
-		} elseif ( 'slug' === $query_args['orderby'] ) {
+		} elseif ('slug' === $query_args['orderby']) {
 			$query_args['orderby'] = 'name';
 		}
 
-		return apply_filters( 'getpaid_rest_prepare_items_query', $query_args, $request, $this );
+		return apply_filters('getpaid_rest_prepare_items_query', $query_args, $request, $this);
 
 	}
 
@@ -621,12 +621,12 @@ 
 		 *
 		 * @param array  Array of allowed WP_Query query vars.
 		 */
-		$valid_vars = apply_filters( 'query_vars', $wp->public_query_vars );
+		$valid_vars = apply_filters('query_vars', $wp->public_query_vars);
 
-		$post_type_obj = get_post_type_object( $this->post_type );
-		if ( current_user_can( $post_type_obj->cap->edit_posts ) ) {
-			$private = apply_filters( 'getpaid_rest_private_query_vars', $wp->private_query_vars );
-			$valid_vars = array_merge( $valid_vars, $private );
+		$post_type_obj = get_post_type_object($this->post_type);
+		if (current_user_can($post_type_obj->cap->edit_posts)) {
+			$private = apply_filters('getpaid_rest_private_query_vars', $wp->private_query_vars);
+			$valid_vars = array_merge($valid_vars, $private);
 		}
 
 		// Define our own in addition to WP's normal vars.
@@ -648,10 +648,10 @@ 
 			'meta_compare',
 			'meta_value_num',
 		);
-		$valid_vars = array_merge( $valid_vars, $rest_valid );
+		$valid_vars = array_merge($valid_vars, $rest_valid);
 
 		// Filter allowed query vars for the REST API.
-		$valid_vars = apply_filters( 'getpaid_rest_query_vars', $valid_vars, $this );
+		$valid_vars = apply_filters('getpaid_rest_query_vars', $valid_vars, $this);
 
 		return $valid_vars;
 	}
@@ -668,32 +668,32 @@ 
 
 		$params['status'] = array(
 			'default'           => $this->get_post_statuses(),
-			'description'       => __( 'Limit result set to resources assigned one or more statuses.', 'invoicing' ),
-			'type'              => array( 'array', 'string' ),
+			'description'       => __('Limit result set to resources assigned one or more statuses.', 'invoicing'),
+			'type'              => array('array', 'string'),
 			'items'             => array(
 				'enum'          => $this->get_post_statuses(),
 				'type'          => 'string',
 			),
 			'validate_callback' => 'rest_validate_request_arg',
-			'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
+			'sanitize_callback' => array($this, 'sanitize_post_statuses'),
 		);
 
 		$params['after'] = array(
-			'description'        => __( 'Limit response to resources created after a given ISO8601 compliant date.', 'invoicing' ),
+			'description'        => __('Limit response to resources created after a given ISO8601 compliant date.', 'invoicing'),
 			'type'               => 'string',
 			'format'             => 'string',
 			'validate_callback'  => 'rest_validate_request_arg',
 			'sanitize_callback'  => 'sanitize_text_field',
 		);
 		$params['before'] = array(
-			'description'        => __( 'Limit response to resources created before a given ISO8601 compliant date.', 'invoicing' ),
+			'description'        => __('Limit response to resources created before a given ISO8601 compliant date.', 'invoicing'),
 			'type'               => 'string',
 			'format'             => 'string',
 			'validate_callback'  => 'rest_validate_request_arg',
 			'sanitize_callback'  => 'sanitize_text_field',
 		);
 		$params['exclude'] = array(
-			'description'       => __( 'Ensure result set excludes specific IDs.', 'invoicing' ),
+			'description'       => __('Ensure result set excludes specific IDs.', 'invoicing'),
 			'type'              => 'array',
 			'items'             => array(
 				'type'          => 'integer',
@@ -703,7 +703,7 @@ 
 			'validate_callback' => 'rest_validate_request_arg',
 		);
 		$params['include'] = array(
-			'description'       => __( 'Limit result set to specific ids.', 'invoicing' ),
+			'description'       => __('Limit result set to specific ids.', 'invoicing'),
 			'type'              => 'array',
 			'items'             => array(
 				'type'          => 'integer',
@@ -713,20 +713,20 @@ 
 			'validate_callback' => 'rest_validate_request_arg',
 		);
 		$params['offset'] = array(
-			'description'        => __( 'Offset the result set by a specific number of items.', 'invoicing' ),
+			'description'        => __('Offset the result set by a specific number of items.', 'invoicing'),
 			'type'               => 'integer',
 			'sanitize_callback'  => 'absint',
 			'validate_callback'  => 'rest_validate_request_arg',
 		);
 		$params['order'] = array(
-			'description'        => __( 'Order sort attribute ascending or descending.', 'invoicing' ),
+			'description'        => __('Order sort attribute ascending or descending.', 'invoicing'),
 			'type'               => 'string',
 			'default'            => 'desc',
-			'enum'               => array( 'asc', 'desc' ),
+			'enum'               => array('asc', 'desc'),
 			'validate_callback'  => 'rest_validate_request_arg',
 		);
 		$params['orderby'] = array(
-			'description'        => __( 'Sort collection by object attribute.', 'invoicing' ),
+			'description'        => __('Sort collection by object attribute.', 'invoicing'),
 			'type'               => 'string',
 			'default'            => 'date',
 			'enum'               => array(
@@ -740,11 +740,11 @@ 
 			'validate_callback'  => 'rest_validate_request_arg',
 		);
 
-		$post_type_obj = get_post_type_object( $this->post_type );
+		$post_type_obj = get_post_type_object($this->post_type);
 
-		if ( isset( $post_type_obj->hierarchical ) && $post_type_obj->hierarchical ) {
+		if (isset($post_type_obj->hierarchical) && $post_type_obj->hierarchical) {
 			$params['parent'] = array(
-				'description'       => __( 'Limit result set to those of particular parent IDs.', 'invoicing' ),
+				'description'       => __('Limit result set to those of particular parent IDs.', 'invoicing'),
 				'type'              => 'array',
 				'items'             => array(
 					'type'          => 'integer',
@@ -753,7 +753,7 @@ 
 				'default'           => array(),
 			);
 			$params['parent_exclude'] = array(
-				'description'       => __( 'Limit result set to all items except those of a particular parent ID.', 'invoicing' ),
+				'description'       => __('Limit result set to all items except those of a particular parent ID.', 'invoicing'),
 				'type'              => 'array',
 				'items'             => array(
 					'type'          => 'integer',
@@ -776,25 +776,25 @@ 
 	public function get_item_schema() {
 
 		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
+		if ($this->schema) {
+			return $this->add_additional_fields_schema($this->schema);
 		}
 
-		$type   = str_replace( 'wpi_', '', $this->post_type );
+		$type   = str_replace('wpi_', '', $this->post_type);
 		$schema = array(
 			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => $this->post_type,
 			'type'       => 'object',
-			'properties' => wpinv_get_data( "$type-schema" ),
+			'properties' => wpinv_get_data("$type-schema"),
 		);
 
 		// Filters the invoice schema for the REST API.
-        $schema = apply_filters( "wpinv_rest_{$type}_schema", $schema );
+        $schema = apply_filters("wpinv_rest_{$type}_schema", $schema);
 
 		// Cache the invoice schema.
 		$this->schema = $schema;
 
-		return $this->add_additional_fields_schema( $this->schema );
+		return $this->add_additional_fields_schema($this->schema);
 	}
 
 	/**
@@ -803,8 +803,8 @@ 
 	 * @param  array $schema Schema.
 	 * @return bool
 	 */
-	public function filter_writable_props( $schema ) {
-		return empty( $schema['readonly'] );
+	public function filter_writable_props($schema) {
+		return empty($schema['readonly']);
 	}
 
 	/**
@@ -817,8 +817,8 @@ 
 	 * @param string          $parameter Additional parameter to pass to validation.
 	 * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
 	 */
-	public function sanitize_post_statuses( $statuses, $request, $parameter ) {
-		return array_intersect( wp_parse_slug_list( $statuses ), $this->get_post_statuses() );
+	public function sanitize_post_statuses($statuses, $request, $parameter) {
+		return array_intersect(wp_parse_slug_list($statuses), $this->get_post_statuses());
 	}
 
 	/**
@@ -839,43 +839,43 @@ 
 	 * @param  WP_REST_Request $request Request object.
 	 * @return GetPaid_Data|WP_Error Data object or WP_Error.
 	 */
-	protected function prepare_item_for_database( $request ) {
+	protected function prepare_item_for_database($request) {
 
 		// Do we have an object?
-		if ( empty( $this->crud_class ) || ! class_exists( $this->crud_class ) ) {
-			return new WP_Error( 'no_crud_class', __( 'You need to specify a CRUD class for this controller', 'invoicing' ) );
+		if (empty($this->crud_class) || !class_exists($this->crud_class)) {
+			return new WP_Error('no_crud_class', __('You need to specify a CRUD class for this controller', 'invoicing'));
 		}
 
 		// Prepare the object.
-		$id        = isset( $request['id'] ) ? absint( $request['id'] ) : 0;
-		$object    = new $this->crud_class( $id );
+		$id        = isset($request['id']) ? absint($request['id']) : 0;
+		$object    = new $this->crud_class($id);
 
 		// Abort if an error exists.
-		if ( ! empty( $object->last_error ) ) {
-			return new WP_Error( 'invalid_item', $object->last_error );
+		if (!empty($object->last_error)) {
+			return new WP_Error('invalid_item', $object->last_error);
 		}
 
 		$schema    = $this->get_item_schema();
-		$data_keys = array_keys( array_filter( $schema['properties'], array( $this, 'filter_writable_props' ) ) );
+		$data_keys = array_keys(array_filter($schema['properties'], array($this, 'filter_writable_props')));
 
 		// Handle all writable props.
-		foreach ( $data_keys as $key ) {
-			$value = $request[ $key ];
+		foreach ($data_keys as $key) {
+			$value = $request[$key];
 
-			if ( ! is_null( $value ) ) {
-				switch ( $key ) {
+			if (!is_null($value)) {
+				switch ($key) {
 
 					case 'meta_data':
-						if ( is_array( $value ) ) {
-							foreach ( $value as $meta ) {
-								$object->update_meta_data( $meta['key'], $meta['value'], isset( $meta['id'] ) ? $meta['id'] : '' );
+						if (is_array($value)) {
+							foreach ($value as $meta) {
+								$object->update_meta_data($meta['key'], $meta['value'], isset($meta['id']) ? $meta['id'] : '');
 							}
 						}
 						break;
 
 					default:
-						if ( is_callable( array( $object, "set_{$key}" ) ) ) {
-							$object->{"set_{$key}"}( $value );
+						if (is_callable(array($object, "set_{$key}"))) {
+							$object->{"set_{$key}"}($value);
 						}
 						break;
 				}
@@ -884,7 +884,7 @@ 
 		}
 
 		// Filters an object before it is inserted via the REST API..
-		return apply_filters( "getpaid_rest_pre_insert_{$this->post_type}_object", $object, $request );
+		return apply_filters("getpaid_rest_pre_insert_{$this->post_type}_object", $object, $request);
 	}
 
 	/**
@@ -894,10 +894,10 @@ 
 	 * @param  GetPaid_Meta_Data[]    $meta_data  meta data objects.
 	 * @return array
 	 */
-	protected function prepare_object_meta_data( $meta_data ) {
+	protected function prepare_object_meta_data($meta_data) {
 		$meta = array();
 
-		foreach( $meta_data as $object ) {
+		foreach ($meta_data as $object) {
 			$meta[] = $object->get_data();
 		}
 
@@ -912,14 +912,14 @@ 
 	 * @param array            $fields Fields to include.
 	 * @return array
 	 */
-	protected function prepare_invoice_items( $invoice ) {
+	protected function prepare_invoice_items($invoice) {
 		$items = array();
 
-		foreach( $invoice->get_items() as $item ) {
+		foreach ($invoice->get_items() as $item) {
 
 			$item_data = $item->prepare_data_for_saving();
 
-			if ( 'amount' == $invoice->get_template() ) {
+			if ('amount' == $invoice->get_template()) {
 				$item_data['quantity'] = 1;
 			}
 
@@ -938,52 +938,52 @@ 
 	 * @param string           $context either view or edit.
 	 * @return array
 	 */
-	protected function prepare_object_data( $object, $fields, $context = 'view' ) {
+	protected function prepare_object_data($object, $fields, $context = 'view') {
 
 		$data = array();
 
 		// Handle all writable props.
-		foreach ( array_keys( $this->get_schema_properties() ) as $key ) {
+		foreach (array_keys($this->get_schema_properties()) as $key) {
 
 			// Abort if it is not included.
-			if ( ! empty( $fields ) && ! $this->is_field_included( $key, $fields ) ) {
+			if (!empty($fields) && !$this->is_field_included($key, $fields)) {
 				continue;
 			}
 
 			// Or this current object does not support the field.
-			if ( ! $this->object_supports_field( $object, $key ) ) {
+			if (!$this->object_supports_field($object, $key)) {
 				continue;
 			}
 
 			// Handle meta data.
-			if ( $key == 'meta_data' ) {
-				$data['meta_data'] = $this->prepare_object_meta_data( $object->get_meta_data() );
+			if ($key == 'meta_data') {
+				$data['meta_data'] = $this->prepare_object_meta_data($object->get_meta_data());
 				continue;
 			}
 
 			// Handle items.
-			if ( $key == 'items' && is_a( $object, 'WPInv_Invoice' )  ) {
-				$data['items'] = $this->prepare_invoice_items( $object );
+			if ($key == 'items' && is_a($object, 'WPInv_Invoice')) {
+				$data['items'] = $this->prepare_invoice_items($object);
 				continue;
 			}
 
 			// Booleans.
-			if ( is_callable( array( $object, $key ) ) ) {
-				$data[ $key ] = $object->$key( $context );
+			if (is_callable(array($object, $key))) {
+				$data[$key] = $object->$key($context);
 				continue;
 			}
 
 			// Get object value.
-			if ( is_callable( array( $object, "get_{$key}" ) ) ) {
-				$value = $object->{"get_{$key}"}( $context );
+			if (is_callable(array($object, "get_{$key}"))) {
+				$value = $object->{"get_{$key}"}($context);
 
 				// If the value is an instance of GetPaid_Data...
-				if ( is_a( $value, 'GetPaid_Data' ) ) {
-					$value = $value->get_data( $context );
+				if (is_a($value, 'GetPaid_Data')) {
+					$value = $value->get_data($context);
 				}
 
 				// For objects, retrieves it's properties.
-				$data[ $key ] = is_object( $value ) ? get_object_vars( $value ) :  $value ;
+				$data[$key] = is_object($value) ? get_object_vars($value) : $value;
 				continue;
 			}
 
@@ -1000,8 +1000,8 @@ 
 	 * @param  string       $field_key The key to check for.
 	 * @return bool
 	 */
-	public function object_supports_field( $object, $field_key ) {
-		return apply_filters( "getpaid_rest_{$this->post_type}_object_supports_key", true, $object, $field_key );
+	public function object_supports_field($object, $field_key) {
+		return apply_filters("getpaid_rest_{$this->post_type}_object_supports_key", true, $object, $field_key);
 	}
 
 	/**
@@ -1012,24 +1012,24 @@ 
 	 * @param  WP_REST_Request $request Request object.
 	 * @return WP_REST_Response
 	 */
-	public function prepare_item_for_response( $object, $request ) {
+	public function prepare_item_for_response($object, $request) {
 
 		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
+		$fields = $this->get_fields_for_response($request);
 
 		// Prepare object data.
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->prepare_object_data( $object, $fields, $context );
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->limit_object_to_requested_fields( $data, $fields );
-		$data    = $this->filter_response_by_context( $data, $context );
+		$context = !empty($request['context']) ? $request['context'] : 'view';
+		$data    = $this->prepare_object_data($object, $fields, $context);
+		$data    = $this->add_additional_fields_to_object($data, $request);
+		$data    = $this->limit_object_to_requested_fields($data, $fields);
+		$data    = $this->filter_response_by_context($data, $context);
 
 		// Prepare the response.
-		$response = rest_ensure_response( $data );
-		$response->add_links( $this->prepare_links( $object, $request ) );
+		$response = rest_ensure_response($data);
+		$response->add_links($this->prepare_links($object, $request));
 
 		// Filter item response.
-		return apply_filters( "getpaid_rest_prepare_{$this->post_type}_object", $response, $object, $request );
+		return apply_filters("getpaid_rest_prepare_{$this->post_type}_object", $response, $object, $request);
 	}
 
 }

includes/wpinv-template-functions.php

Indentation +120 added lines, -120 removed lines

@@ -140,7 +140,7 @@ 
  * @param string $default_path The root path to the default template. Defaults to invoicing/templates
  */
 function wpinv_get_template_html( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
-	return getpaid_template()->get_template( $template_name, $args, $template_path, $default_path );
+    return getpaid_template()->get_template( $template_name, $args, $template_path, $default_path );
 }
 
 /**
@@ -158,7 +158,7 @@ 
  * @return string
  */
 function wpinv_get_theme_template_dir_name() {
-	return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
+    return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
 }
 
 /**
@@ -175,122 +175,122 @@ 
 }
 
 function wpinv_get_template_part( $slug, $name = null, $load = true ) {
-	do_action( 'get_template_part_' . $slug, $slug, $name );
+    do_action( 'get_template_part_' . $slug, $slug, $name );
 
-	// Setup possible parts
-	$templates = array();
-	if ( isset( $name ) )
-		$templates[] = $slug . '-' . $name . '.php';
-	$templates[] = $slug . '.php';
+    // Setup possible parts
+    $templates = array();
+    if ( isset( $name ) )
+        $templates[] = $slug . '-' . $name . '.php';
+    $templates[] = $slug . '.php';
 
-	// Allow template parts to be filtered
-	$templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
+    // Allow template parts to be filtered
+    $templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
 
-	// Return the part that is found
-	return wpinv_locate_tmpl( $templates, $load, false );
+    // Return the part that is found
+    return wpinv_locate_tmpl( $templates, $load, false );
 }
 
 function wpinv_locate_tmpl( $template_names, $load = false, $require_once = true ) {
-	// No file found yet
-	$located = false;
+    // No file found yet
+    $located = false;
 
-	// Try to find a template file
-	foreach ( (array)$template_names as $template_name ) {
+    // Try to find a template file
+    foreach ( (array)$template_names as $template_name ) {
 
-		// Continue if template is empty
-		if ( empty( $template_name ) )
-			continue;
+        // Continue if template is empty
+        if ( empty( $template_name ) )
+            continue;
 
-		// Trim off any slashes from the template name
-		$template_name = ltrim( $template_name, '/' );
+        // Trim off any slashes from the template name
+        $template_name = ltrim( $template_name, '/' );
 
-		// try locating this template file by looping through the template paths
-		foreach( wpinv_get_theme_template_paths() as $template_path ) {
+        // try locating this template file by looping through the template paths
+        foreach( wpinv_get_theme_template_paths() as $template_path ) {
 
-			if( file_exists( $template_path . $template_name ) ) {
-				$located = $template_path . $template_name;
-				break;
-			}
-		}
+            if( file_exists( $template_path . $template_name ) ) {
+                $located = $template_path . $template_name;
+                break;
+            }
+        }
 
-		if( !empty( $located ) ) {
-			break;
-		}
-	}
+        if( !empty( $located ) ) {
+            break;
+        }
+    }
 
-	if ( ( true == $load ) && ! empty( $located ) )
-		load_template( $located, $require_once );
+    if ( ( true == $load ) && ! empty( $located ) )
+        load_template( $located, $require_once );
 
-	return $located;
+    return $located;
 }
 
 function wpinv_get_theme_template_paths() {
-	$template_dir = wpinv_get_theme_template_dir_name();
+    $template_dir = wpinv_get_theme_template_dir_name();
 
-	$file_paths = array(
-		1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
-		10 => trailingslashit( get_template_directory() ) . $template_dir,
-		100 => wpinv_get_templates_dir()
-	);
+    $file_paths = array(
+        1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
+        10 => trailingslashit( get_template_directory() ) . $template_dir,
+        100 => wpinv_get_templates_dir()
+    );
 
-	$file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
+    $file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
 
-	// sort the file paths based on priority
-	ksort( $file_paths, SORT_NUMERIC );
+    // sort the file paths based on priority
+    ksort( $file_paths, SORT_NUMERIC );
 
-	return array_map( 'trailingslashit', $file_paths );
+    return array_map( 'trailingslashit', $file_paths );
 }
 
 function wpinv_checkout_meta_tags() {
 
-	$pages   = array();
-	$pages[] = wpinv_get_option( 'success_page' );
-	$pages[] = wpinv_get_option( 'failure_page' );
-	$pages[] = wpinv_get_option( 'invoice_history_page' );
-	$pages[] = wpinv_get_option( 'invoice_subscription_page' );
+    $pages   = array();
+    $pages[] = wpinv_get_option( 'success_page' );
+    $pages[] = wpinv_get_option( 'failure_page' );
+    $pages[] = wpinv_get_option( 'invoice_history_page' );
+    $pages[] = wpinv_get_option( 'invoice_subscription_page' );
 
-	if( !wpinv_is_checkout() && !is_page( $pages ) ) {
-		return;
-	}
+    if( !wpinv_is_checkout() && !is_page( $pages ) ) {
+        return;
+    }
 
-	echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
+    echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
 }
 add_action( 'wp_head', 'wpinv_checkout_meta_tags' );
 
 function wpinv_add_body_classes( $class ) {
-	$classes = (array)$class;
+    $classes = (array)$class;
 
-	if( wpinv_is_checkout() ) {
-		$classes[] = 'wpinv-checkout';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_checkout() ) {
+        $classes[] = 'wpinv-checkout';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_success_page() ) {
-		$classes[] = 'wpinv-success';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_success_page() ) {
+        $classes[] = 'wpinv-success';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_failed_transaction_page() ) {
-		$classes[] = 'wpinv-failed-transaction';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_failed_transaction_page() ) {
+        $classes[] = 'wpinv-failed-transaction';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_invoice_history_page() ) {
-		$classes[] = 'wpinv-history';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_invoice_history_page() ) {
+        $classes[] = 'wpinv-history';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_subscriptions_history_page() ) {
-		$classes[] = 'wpinv-subscription';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_subscriptions_history_page() ) {
+        $classes[] = 'wpinv-subscription';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_test_mode() ) {
-		$classes[] = 'wpinv-test-mode';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_test_mode() ) {
+        $classes[] = 'wpinv-test-mode';
+        $classes[] = 'wpinv-page';
+    }
 
-	return array_unique( $classes );
+    return array_unique( $classes );
 }
 add_filter( 'body_class', 'wpinv_add_body_classes' );
 
@@ -992,21 +992,21 @@ 
 
     $formatted_address = str_ireplace( array_keys( $replacements ), $replacements, $format );
     
-	// Remove unavailable tags.
+    // Remove unavailable tags.
     $formatted_address = preg_replace( "/\{\{\w+\}\}/", '', $formatted_address );
 
     // Clean up white space.
-	$formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
+    $formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
     $formatted_address = preg_replace( '/\n\n+/', "\n", $formatted_address );
     
     // Break newlines apart and remove empty lines/trim commas and white space.
-	$formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
+    $formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
 
     // Add html breaks.
-	$formatted_address = implode( $separator, $formatted_address );
+    $formatted_address = implode( $separator, $formatted_address );
 
-	// We're done!
-	return $formatted_address;
+    // We're done!
+    return $formatted_address;
     
 }
 
@@ -1208,7 +1208,7 @@ 
 }
 
 function wpinv_empty_cart_message() {
-	return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
+    return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
 }
 
 /**
@@ -1560,10 +1560,10 @@ 
 
     if ( 0 == count( $form->get_items() ) ) {
         echo aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'No published items found', 'invoicing' ),
-			)
+            array(
+                'type'    => 'warning',
+                'content' => __( 'No published items found', 'invoicing' ),
+            )
         );
         return;
     }
@@ -1580,47 +1580,47 @@ 
     $invoice = wpinv_get_invoice( $invoice_id );
 
     if ( empty( $invoice ) ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'Invoice not found', 'invoicing' ),
-			)
-		);
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'Invoice not found', 'invoicing' ),
+            )
+        );
     }
 
     if ( $invoice->is_paid() ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'Invoice has already been paid', 'invoicing' ),
-			)
-		);
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'Invoice has already been paid', 'invoicing' ),
+            )
+        );
     }
 
     // Get the form elements and items.
     $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+    $elements = $invoicing->form_elements->get_form_elements( $form );
+    $items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
 
-	ob_start();
-	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+    ob_start();
+    echo "<form class='wpinv_payment_form'>";
+    do_action( 'wpinv_payment_form_top' );
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='invoice_id' value='$invoice_id'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+    wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
+    wp_nonce_field( 'vat_validation', '_wpi_nonce' );
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
-	}
+    foreach ( $elements as $element ) {
+        do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
+        do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+    }
 
-	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
-	echo '</form>';
+    echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
+    do_action( 'wpinv_payment_form_bottom' );
+    echo '</form>';
 
-	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+    $content = ob_get_clean();
+    return str_replace( 'sr-only', '', $content );
 }
 
 /**
@@ -1675,7 +1675,7 @@ 
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-form='$form'>$label</button>"; 
     }
 	
-	if ( ! empty( $items ) ) {
+    if ( ! empty( $items ) ) {
         $items  = esc_attr( $items );
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-item='$items'>$label</button>"; 
     }

Spacing +533 added lines, -533 removed lines

@@ -4,99 +4,99 @@ 
  *
  */
 
-defined( 'ABSPATH' ) || exit;
+defined('ABSPATH') || exit;
 
 /**
  * Displays an invoice.
  * 
  * @param WPInv_Invoice $invoice.
  */
-function getpaid_invoice( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/invoice.php', compact( 'invoice' ) );
+function getpaid_invoice($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/invoice.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice', 'getpaid_invoice', 10 );
+add_action('getpaid_invoice', 'getpaid_invoice', 10);
 
 /**
  * Displays the invoice footer.
  */
-function getpaid_invoice_footer( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/footer.php', compact( 'invoice' ) );
+function getpaid_invoice_footer($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/footer.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_footer', 'getpaid_invoice_footer', 10 );
+add_action('getpaid_invoice_footer', 'getpaid_invoice_footer', 10);
 
 /**
  * Displays the invoice top bar.
  */
-function getpaid_invoice_header( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/header.php', compact( 'invoice' ) );
+function getpaid_invoice_header($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/header.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_header', 'getpaid_invoice_header', 10 );
+add_action('getpaid_invoice_header', 'getpaid_invoice_header', 10);
 
 /**
  * Displays actions on the left side of the header.
  */
-function getpaid_invoice_header_left_actions( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/header-left-actions.php', compact( 'invoice' ) );
+function getpaid_invoice_header_left_actions($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/header-left-actions.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_header_left', 'getpaid_invoice_header_left_actions', 10 );
+add_action('getpaid_invoice_header_left', 'getpaid_invoice_header_left_actions', 10);
 
 /**
  * Displays actions on the right side of the invoice top bar.
  */
-function getpaid_invoice_header_right_actions( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/header-right-actions.php', compact( 'invoice' ) );
+function getpaid_invoice_header_right_actions($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/header-right-actions.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_header_right', 'getpaid_invoice_header_right_actions', 10 );
+add_action('getpaid_invoice_header_right', 'getpaid_invoice_header_right_actions', 10);
 
 /**
  * Displays the invoice title, watermark, logo etc.
  */
-function getpaid_invoice_details_top( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/details-top.php', compact( 'invoice' ) );
+function getpaid_invoice_details_top($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/details-top.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_details', 'getpaid_invoice_details_top', 10 );
+add_action('getpaid_invoice_details', 'getpaid_invoice_details_top', 10);
 
 /**
  * Displays the company logo.
  */
-function getpaid_invoice_logo( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/invoice-logo.php', compact( 'invoice' ) );
+function getpaid_invoice_logo($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/invoice-logo.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_details_top_left', 'getpaid_invoice_logo' );
+add_action('getpaid_invoice_details_top_left', 'getpaid_invoice_logo');
 
 /**
  * Displays the type of invoice.
  */
-function getpaid_invoice_type( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/invoice-type.php', compact( 'invoice' ) );
+function getpaid_invoice_type($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/invoice-type.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_details_top_right', 'getpaid_invoice_type' );
+add_action('getpaid_invoice_details_top_right', 'getpaid_invoice_type');
 
 /**
  * Displays the invoice details.
  */
-function getpaid_invoice_details_main( $invoice ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/details.php', compact( 'invoice' ) );
+function getpaid_invoice_details_main($invoice) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/details.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_details', 'getpaid_invoice_details_main', 50 );
+add_action('getpaid_invoice_details', 'getpaid_invoice_details_main', 50);
 
 /**
  * Returns a path to the templates directory.
@@ -125,8 +125,8 @@ 
  * @param string $template_path The templates directory relative to the theme's root dir. Defaults to 'invoicing'.
  * @param string $default_path The root path to the default template. Defaults to invoicing/templates
  */
-function wpinv_get_template( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
-    return getpaid_template()->display_template( $template_name, $args, $template_path, $default_path );
+function wpinv_get_template($template_name, $args = array(), $template_path = '', $default_path = '') {
+    return getpaid_template()->display_template($template_name, $args, $template_path, $default_path);
 }
 
 /**
@@ -139,8 +139,8 @@ 
  * @param string $template_path The templates directory relative to the theme's root dir. Defaults to 'invoicing'.
  * @param string $default_path The root path to the default template. Defaults to invoicing/templates
  */
-function wpinv_get_template_html( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
-	return getpaid_template()->get_template( $template_name, $args, $template_path, $default_path );
+function wpinv_get_template_html($template_name, $args = array(), $template_path = '', $default_path = '') {
+	return getpaid_template()->get_template($template_name, $args, $template_path, $default_path);
 }
 
 /**
@@ -149,7 +149,7 @@ 
  * @return string
  */
 function wpinv_template_path() {
-    return apply_filters( 'wpinv_template_path', wpinv_get_theme_template_dir_name() );
+    return apply_filters('wpinv_template_path', wpinv_get_theme_template_dir_name());
 }
 
 /**
@@ -158,7 +158,7 @@ 
  * @return string
  */
 function wpinv_get_theme_template_dir_name() {
-	return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
+	return trailingslashit(apply_filters('wpinv_templates_dir', 'invoicing'));
 }
 
 /**
@@ -170,56 +170,56 @@ 
  * @param string $template_path The template path relative to the theme's root dir. Defaults to 'invoicing'.
  * @param string $default_path The root path to the default template. Defaults to invoicing/templates
  */
-function wpinv_locate_template( $template_name, $template_path = '', $default_path = '' ) {
-    return getpaid_template()->locate_template( $template_name, $template_path, $default_path );
+function wpinv_locate_template($template_name, $template_path = '', $default_path = '') {
+    return getpaid_template()->locate_template($template_name, $template_path, $default_path);
 }
 
-function wpinv_get_template_part( $slug, $name = null, $load = true ) {
-	do_action( 'get_template_part_' . $slug, $slug, $name );
+function wpinv_get_template_part($slug, $name = null, $load = true) {
+	do_action('get_template_part_' . $slug, $slug, $name);
 
 	// Setup possible parts
 	$templates = array();
-	if ( isset( $name ) )
+	if (isset($name))
 		$templates[] = $slug . '-' . $name . '.php';
 	$templates[] = $slug . '.php';
 
 	// Allow template parts to be filtered
-	$templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
+	$templates = apply_filters('wpinv_get_template_part', $templates, $slug, $name);
 
 	// Return the part that is found
-	return wpinv_locate_tmpl( $templates, $load, false );
+	return wpinv_locate_tmpl($templates, $load, false);
 }
 
-function wpinv_locate_tmpl( $template_names, $load = false, $require_once = true ) {
+function wpinv_locate_tmpl($template_names, $load = false, $require_once = true) {
 	// No file found yet
 	$located = false;
 
 	// Try to find a template file
-	foreach ( (array)$template_names as $template_name ) {
+	foreach ((array) $template_names as $template_name) {
 
 		// Continue if template is empty
-		if ( empty( $template_name ) )
+		if (empty($template_name))
 			continue;
 
 		// Trim off any slashes from the template name
-		$template_name = ltrim( $template_name, '/' );
+		$template_name = ltrim($template_name, '/');
 
 		// try locating this template file by looping through the template paths
-		foreach( wpinv_get_theme_template_paths() as $template_path ) {
+		foreach (wpinv_get_theme_template_paths() as $template_path) {
 
-			if( file_exists( $template_path . $template_name ) ) {
+			if (file_exists($template_path . $template_name)) {
 				$located = $template_path . $template_name;
 				break;
 			}
 		}
 
-		if( !empty( $located ) ) {
+		if (!empty($located)) {
 			break;
 		}
 	}
 
-	if ( ( true == $load ) && ! empty( $located ) )
-		load_template( $located, $require_once );
+	if ((true == $load) && !empty($located))
+		load_template($located, $require_once);
 
 	return $located;
 }
@@ -228,155 +228,155 @@ 
 	$template_dir = wpinv_get_theme_template_dir_name();
 
 	$file_paths = array(
-		1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
-		10 => trailingslashit( get_template_directory() ) . $template_dir,
+		1 => trailingslashit(get_stylesheet_directory()) . $template_dir,
+		10 => trailingslashit(get_template_directory()) . $template_dir,
 		100 => wpinv_get_templates_dir()
 	);
 
-	$file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
+	$file_paths = apply_filters('wpinv_template_paths', $file_paths);
 
 	// sort the file paths based on priority
-	ksort( $file_paths, SORT_NUMERIC );
+	ksort($file_paths, SORT_NUMERIC);
 
-	return array_map( 'trailingslashit', $file_paths );
+	return array_map('trailingslashit', $file_paths);
 }
 
 function wpinv_checkout_meta_tags() {
 
 	$pages   = array();
-	$pages[] = wpinv_get_option( 'success_page' );
-	$pages[] = wpinv_get_option( 'failure_page' );
-	$pages[] = wpinv_get_option( 'invoice_history_page' );
-	$pages[] = wpinv_get_option( 'invoice_subscription_page' );
+	$pages[] = wpinv_get_option('success_page');
+	$pages[] = wpinv_get_option('failure_page');
+	$pages[] = wpinv_get_option('invoice_history_page');
+	$pages[] = wpinv_get_option('invoice_subscription_page');
 
-	if( !wpinv_is_checkout() && !is_page( $pages ) ) {
+	if (!wpinv_is_checkout() && !is_page($pages)) {
 		return;
 	}
 
 	echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
 }
-add_action( 'wp_head', 'wpinv_checkout_meta_tags' );
+add_action('wp_head', 'wpinv_checkout_meta_tags');
 
-function wpinv_add_body_classes( $class ) {
-	$classes = (array)$class;
+function wpinv_add_body_classes($class) {
+	$classes = (array) $class;
 
-	if( wpinv_is_checkout() ) {
+	if (wpinv_is_checkout()) {
 		$classes[] = 'wpinv-checkout';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_success_page() ) {
+	if (wpinv_is_success_page()) {
 		$classes[] = 'wpinv-success';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_failed_transaction_page() ) {
+	if (wpinv_is_failed_transaction_page()) {
 		$classes[] = 'wpinv-failed-transaction';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_invoice_history_page() ) {
+	if (wpinv_is_invoice_history_page()) {
 		$classes[] = 'wpinv-history';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_subscriptions_history_page() ) {
+	if (wpinv_is_subscriptions_history_page()) {
 		$classes[] = 'wpinv-subscription';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_test_mode() ) {
+	if (wpinv_is_test_mode()) {
 		$classes[] = 'wpinv-test-mode';
 		$classes[] = 'wpinv-page';
 	}
 
-	return array_unique( $classes );
+	return array_unique($classes);
 }
-add_filter( 'body_class', 'wpinv_add_body_classes' );
+add_filter('body_class', 'wpinv_add_body_classes');
 
-function wpinv_html_dropdown( $name = 'wpinv_discounts', $selected = 0, $status = '' ) {
-    $args = array( 'nopaging' => true );
+function wpinv_html_dropdown($name = 'wpinv_discounts', $selected = 0, $status = '') {
+    $args = array('nopaging' => true);
 
-    if ( ! empty( $status ) )
+    if (!empty($status))
         $args['post_status'] = $status;
 
-    $discounts = wpinv_get_discounts( $args );
+    $discounts = wpinv_get_discounts($args);
     $options   = array();
 
-    if ( $discounts ) {
-        foreach ( $discounts as $discount ) {
-            $options[ absint( $discount->ID ) ] = esc_html( get_the_title( $discount->ID ) );
+    if ($discounts) {
+        foreach ($discounts as $discount) {
+            $options[absint($discount->ID)] = esc_html(get_the_title($discount->ID));
         }
     } else {
-        $options[0] = __( 'No discounts found', 'invoicing' );
+        $options[0] = __('No discounts found', 'invoicing');
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false,
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_year_dropdown( $name = 'year', $selected = 0, $years_before = 5, $years_after = 0 ) {
-    $current     = date( 'Y' );
-    $start_year  = $current - absint( $years_before );
-    $end_year    = $current + absint( $years_after );
-    $selected    = empty( $selected ) ? date( 'Y' ) : $selected;
+function wpinv_html_year_dropdown($name = 'year', $selected = 0, $years_before = 5, $years_after = 0) {
+    $current     = date('Y');
+    $start_year  = $current - absint($years_before);
+    $end_year    = $current + absint($years_after);
+    $selected    = empty($selected) ? date('Y') : $selected;
     $options     = array();
 
-    while ( $start_year <= $end_year ) {
-        $options[ absint( $start_year ) ] = $start_year;
+    while ($start_year <= $end_year) {
+        $options[absint($start_year)] = $start_year;
         $start_year++;
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_month_dropdown( $name = 'month', $selected = 0 ) {
+function wpinv_html_month_dropdown($name = 'month', $selected = 0) {
 
     $options = array(
-        '1'  => __( 'January', 'invoicing' ),
-        '2'  => __( 'February', 'invoicing' ),
-        '3'  => __( 'March', 'invoicing' ),
-        '4'  => __( 'April', 'invoicing' ),
-        '5'  => __( 'May', 'invoicing' ),
-        '6'  => __( 'June', 'invoicing' ),
-        '7'  => __( 'July', 'invoicing' ),
-        '8'  => __( 'August', 'invoicing' ),
-        '9'  => __( 'September', 'invoicing' ),
-        '10' => __( 'October', 'invoicing' ),
-        '11' => __( 'November', 'invoicing' ),
-        '12' => __( 'December', 'invoicing' ),
+        '1'  => __('January', 'invoicing'),
+        '2'  => __('February', 'invoicing'),
+        '3'  => __('March', 'invoicing'),
+        '4'  => __('April', 'invoicing'),
+        '5'  => __('May', 'invoicing'),
+        '6'  => __('June', 'invoicing'),
+        '7'  => __('July', 'invoicing'),
+        '8'  => __('August', 'invoicing'),
+        '9'  => __('September', 'invoicing'),
+        '10' => __('October', 'invoicing'),
+        '11' => __('November', 'invoicing'),
+        '12' => __('December', 'invoicing'),
     );
 
     // If no month is selected, default to the current month
-    $selected = empty( $selected ) ? date( 'n' ) : $selected;
+    $selected = empty($selected) ? date('n') : $selected;
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_select( $args = array() ) {
+function wpinv_html_select($args = array()) {
     $defaults = array(
         'options'          => array(),
         'name'             => null,
@@ -385,8 +385,8 @@ 
         'selected'         => 0,
         'placeholder'      => null,
         'multiple'         => false,
-        'show_option_all'  => _x( 'All', 'all dropdown items', 'invoicing' ),
-        'show_option_none' => _x( 'None', 'no dropdown items', 'invoicing' ),
+        'show_option_all'  => _x('All', 'all dropdown items', 'invoicing'),
+        'show_option_none' => _x('None', 'no dropdown items', 'invoicing'),
         'data'             => array(),
         'onchange'         => null,
         'required'         => false,
@@ -394,74 +394,74 @@ 
         'readonly'         => false,
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $data_elements = '';
-    foreach ( $args['data'] as $key => $value ) {
-        $data_elements .= ' data-' . esc_attr( $key ) . '="' . esc_attr( $value ) . '"';
+    foreach ($args['data'] as $key => $value) {
+        $data_elements .= ' data-' . esc_attr($key) . '="' . esc_attr($value) . '"';
     }
 
-    if( $args['multiple'] ) {
+    if ($args['multiple']) {
         $multiple = ' MULTIPLE';
     } else {
         $multiple = '';
     }
 
-    if( $args['placeholder'] ) {
+    if ($args['placeholder']) {
         $placeholder = $args['placeholder'];
     } else {
         $placeholder = '';
     }
     
     $options = '';
-    if( !empty( $args['onchange'] ) ) {
-        $options .= ' onchange="' . esc_attr( $args['onchange'] ) . '"';
+    if (!empty($args['onchange'])) {
+        $options .= ' onchange="' . esc_attr($args['onchange']) . '"';
     }
     
-    if( !empty( $args['required'] ) ) {
+    if (!empty($args['required'])) {
         $options .= ' required="required"';
     }
     
-    if( !empty( $args['disabled'] ) ) {
+    if (!empty($args['disabled'])) {
         $options .= ' disabled';
     }
     
-    if( !empty( $args['readonly'] ) ) {
+    if (!empty($args['readonly'])) {
         $options .= ' readonly';
     }
 
-    $class  = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
-    $output = '<select name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['id'] ) . '" class="wpinv-select ' . $class . '"' . $multiple . ' data-placeholder="' . $placeholder . '" ' . trim( $options ) . $data_elements . '>';
+    $class  = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
+    $output = '<select name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['id']) . '" class="wpinv-select ' . $class . '"' . $multiple . ' data-placeholder="' . $placeholder . '" ' . trim($options) . $data_elements . '>';
 
-    if ( $args['show_option_all'] ) {
-        if( $args['multiple'] ) {
-            $selected = selected( true, in_array( 0, $args['selected'] ), false );
+    if ($args['show_option_all']) {
+        if ($args['multiple']) {
+            $selected = selected(true, in_array(0, $args['selected']), false);
         } else {
-            $selected = selected( $args['selected'], 0, false );
+            $selected = selected($args['selected'], 0, false);
         }
-        $output .= '<option value="all"' . $selected . '>' . esc_html( $args['show_option_all'] ) . '</option>';
+        $output .= '<option value="all"' . $selected . '>' . esc_html($args['show_option_all']) . '</option>';
     }
 
-    if ( !empty( $args['options'] ) ) {
+    if (!empty($args['options'])) {
 
-        if ( $args['show_option_none'] ) {
-            if( $args['multiple'] ) {
-                $selected = selected( true, in_array( "", $args['selected'] ), false );
+        if ($args['show_option_none']) {
+            if ($args['multiple']) {
+                $selected = selected(true, in_array("", $args['selected']), false);
             } else {
-                $selected = selected( $args['selected'] === "", true, false );
+                $selected = selected($args['selected'] === "", true, false);
             }
-            $output .= '<option value=""' . $selected . '>' . esc_html( $args['show_option_none'] ) . '</option>';
+            $output .= '<option value=""' . $selected . '>' . esc_html($args['show_option_none']) . '</option>';
         }
 
-        foreach( $args['options'] as $key => $option ) {
+        foreach ($args['options'] as $key => $option) {
 
-            if( $args['multiple'] && is_array( $args['selected'] ) ) {
-                $selected = selected( true, (bool)in_array( $key, $args['selected'] ), false );
+            if ($args['multiple'] && is_array($args['selected'])) {
+                $selected = selected(true, (bool) in_array($key, $args['selected']), false);
             } else {
-                $selected = selected( $args['selected'], $key, false );
+                $selected = selected($args['selected'], $key, false);
             }
 
-            $output .= '<option value="' . esc_attr( $key ) . '"' . $selected . '>' . esc_html( $option ) . '</option>';
+            $output .= '<option value="' . esc_attr($key) . '"' . $selected . '>' . esc_html($option) . '</option>';
         }
     }
 
@@ -470,7 +470,7 @@ 
     return $output;
 }
 
-function wpinv_item_dropdown( $args = array() ) {
+function wpinv_item_dropdown($args = array()) {
     $defaults = array(
         'name'              => 'wpi_item',
         'id'                => 'wpi_item',
@@ -478,14 +478,14 @@ 
         'multiple'          => false,
         'selected'          => 0,
         'number'            => 100,
-        'placeholder'       => __( 'Choose a item', 'invoicing' ),
-        'data'              => array( 'search-type' => 'item' ),
+        'placeholder'       => __('Choose a item', 'invoicing'),
+        'data'              => array('search-type' => 'item'),
         'show_option_all'   => false,
         'show_option_none'  => false,
         'show_recurring'    => false,
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $item_args = array(
         'post_type'      => 'wpi_item',
@@ -494,44 +494,44 @@ 
         'posts_per_page' => $args['number']
     );
 
-    $item_args  = apply_filters( 'wpinv_item_dropdown_query_args', $item_args, $args, $defaults );
+    $item_args  = apply_filters('wpinv_item_dropdown_query_args', $item_args, $args, $defaults);
 
-    $items      = get_posts( $item_args );
+    $items      = get_posts($item_args);
     $options    = array();
-    if ( $items ) {
-        foreach ( $items as $item ) {
-            $title = esc_html( $item->post_title );
+    if ($items) {
+        foreach ($items as $item) {
+            $title = esc_html($item->post_title);
             
-            if ( !empty( $args['show_recurring'] ) ) {
-                $title .= wpinv_get_item_suffix( $item->ID, false );
+            if (!empty($args['show_recurring'])) {
+                $title .= wpinv_get_item_suffix($item->ID, false);
             }
             
-            $options[ absint( $item->ID ) ] = $title;
+            $options[absint($item->ID)] = $title;
         }
     }
 
     // This ensures that any selected items are included in the drop down
-    if( is_array( $args['selected'] ) ) {
-        foreach( $args['selected'] as $item ) {
-            if( ! in_array( $item, $options ) ) {
-                $title = get_the_title( $item );
-                if ( !empty( $args['show_recurring'] ) ) {
-                    $title .= wpinv_get_item_suffix( $item, false );
+    if (is_array($args['selected'])) {
+        foreach ($args['selected'] as $item) {
+            if (!in_array($item, $options)) {
+                $title = get_the_title($item);
+                if (!empty($args['show_recurring'])) {
+                    $title .= wpinv_get_item_suffix($item, false);
                 }
                 $options[$item] = $title;
             }
         }
-    } elseif ( is_numeric( $args['selected'] ) && $args['selected'] !== 0 ) {
-        if ( ! in_array( $args['selected'], $options ) ) {
-            $title = get_the_title( $args['selected'] );
-            if ( !empty( $args['show_recurring'] ) ) {
-                $title .= wpinv_get_item_suffix( $args['selected'], false );
+    } elseif (is_numeric($args['selected']) && $args['selected'] !== 0) {
+        if (!in_array($args['selected'], $options)) {
+            $title = get_the_title($args['selected']);
+            if (!empty($args['show_recurring'])) {
+                $title .= wpinv_get_item_suffix($args['selected'], false);
             }
-            $options[$args['selected']] = get_the_title( $args['selected'] );
+            $options[$args['selected']] = get_the_title($args['selected']);
         }
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $args['name'],
         'selected'         => $args['selected'],
         'id'               => $args['id'],
@@ -542,7 +542,7 @@ 
         'show_option_all'  => $args['show_option_all'],
         'show_option_none' => $args['show_option_none'],
         'data'             => $args['data'],
-    ) );
+    ));
 
     return $output;
 }
@@ -562,16 +562,16 @@ 
     );
 
     $options = array();
-    if ( $items ) {
-        foreach ( $items as $item ) {
-            $options[ $item->ID ] = esc_html( $item->post_title ) . wpinv_get_item_suffix( $item->ID, false );
+    if ($items) {
+        foreach ($items as $item) {
+            $options[$item->ID] = esc_html($item->post_title) . wpinv_get_item_suffix($item->ID, false);
         }
     }
 
     return $options;
 }
 
-function wpinv_html_checkbox( $args = array() ) {
+function wpinv_html_checkbox($args = array()) {
     $defaults = array(
         'name'     => null,
         'current'  => null,
@@ -582,17 +582,17 @@ 
         )
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $options = '';
-    if ( ! empty( $args['options']['disabled'] ) ) {
+    if (!empty($args['options']['disabled'])) {
         $options .= ' disabled="disabled"';
-    } elseif ( ! empty( $args['options']['readonly'] ) ) {
+    } elseif (!empty($args['options']['readonly'])) {
         $options .= ' readonly';
     }
 
-    $output = '<input type="checkbox"' . $options . ' name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['name'] ) . '" class="' . $class . ' ' . esc_attr( $args['name'] ) . '" ' . checked( 1, $args['current'], false ) . ' />';
+    $output = '<input type="checkbox"' . $options . ' name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['name']) . '" class="' . $class . ' ' . esc_attr($args['name']) . '" ' . checked(1, $args['current'], false) . ' />';
 
     return $output;
 }
@@ -600,30 +600,30 @@ 
 /**
  * Displays a hidden field.
  */
-function getpaid_hidden_field( $name, $value ) {
-    $name  = sanitize_text_field( $name );
-    $value = esc_attr( $value );
+function getpaid_hidden_field($name, $value) {
+    $name  = sanitize_text_field($name);
+    $value = esc_attr($value);
 
     echo "<input type='hidden' name='$name' value='$value' />";
 }
 
-function wpinv_html_text( $args = array() ) {
+function wpinv_html_text($args = array()) {
     // Backwards compatibility
-    if ( func_num_args() > 1 ) {
+    if (func_num_args() > 1) {
         $args = func_get_args();
 
         $name  = $args[0];
-        $value = isset( $args[1] ) ? $args[1] : '';
-        $label = isset( $args[2] ) ? $args[2] : '';
-        $desc  = isset( $args[3] ) ? $args[3] : '';
+        $value = isset($args[1]) ? $args[1] : '';
+        $label = isset($args[2]) ? $args[2] : '';
+        $desc  = isset($args[3]) ? $args[3] : '';
     }
 
     $defaults = array(
         'id'           => '',
-        'name'         => isset( $name )  ? $name  : 'text',
-        'value'        => isset( $value ) ? $value : null,
-        'label'        => isset( $label ) ? $label : null,
-        'desc'         => isset( $desc )  ? $desc  : null,
+        'name'         => isset($name) ? $name : 'text',
+        'value'        => isset($value) ? $value : null,
+        'label'        => isset($label) ? $label : null,
+        'desc'         => isset($desc) ? $desc : null,
         'placeholder'  => '',
         'class'        => 'regular-text',
         'disabled'     => false,
@@ -633,51 +633,51 @@ 
         'data'         => false
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $options = '';
-    if( $args['required'] ) {
+    if ($args['required']) {
         $options .= ' required="required"';
     }
-    if( $args['readonly'] ) {
+    if ($args['readonly']) {
         $options .= ' readonly';
     }
-    if( $args['readonly'] ) {
+    if ($args['readonly']) {
         $options .= ' readonly';
     }
 
     $data = '';
-    if ( !empty( $args['data'] ) ) {
-        foreach ( $args['data'] as $key => $value ) {
-            $data .= 'data-' . wpinv_sanitize_key( $key ) . '="' . esc_attr( $value ) . '" ';
+    if (!empty($args['data'])) {
+        foreach ($args['data'] as $key => $value) {
+            $data .= 'data-' . wpinv_sanitize_key($key) . '="' . esc_attr($value) . '" ';
         }
     }
 
-    $output = '<span id="wpinv-' . wpinv_sanitize_key( $args['name'] ) . '-wrap">';
-    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key( $args['id'] ) . '">' . esc_html( $args['label'] ) . '</label>';
-    if ( ! empty( $args['desc'] ) ) {
-        $output .= '<span class="wpinv-description">' . esc_html( $args['desc'] ) . '</span>';
+    $output = '<span id="wpinv-' . wpinv_sanitize_key($args['name']) . '-wrap">';
+    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key($args['id']) . '">' . esc_html($args['label']) . '</label>';
+    if (!empty($args['desc'])) {
+        $output .= '<span class="wpinv-description">' . esc_html($args['desc']) . '</span>';
     }
 
-    $output .= '<input type="text" name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['id'] )  . '" autocomplete="' . esc_attr( $args['autocomplete'] )  . '" value="' . esc_attr( $args['value'] ) . '" placeholder="' . esc_attr( $args['placeholder'] ) . '" class="' . $class . '" ' . $data . ' ' . trim( $options ) . '/>';
+    $output .= '<input type="text" name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['id']) . '" autocomplete="' . esc_attr($args['autocomplete']) . '" value="' . esc_attr($args['value']) . '" placeholder="' . esc_attr($args['placeholder']) . '" class="' . $class . '" ' . $data . ' ' . trim($options) . '/>';
 
     $output .= '</span>';
 
     return $output;
 }
 
-function wpinv_html_date_field( $args = array() ) {
-    if( empty( $args['class'] ) ) {
+function wpinv_html_date_field($args = array()) {
+    if (empty($args['class'])) {
         $args['class'] = 'wpiDatepicker';
-    } elseif( ! strpos( $args['class'], 'wpiDatepicker' ) ) {
+    } elseif (!strpos($args['class'], 'wpiDatepicker')) {
         $args['class'] .= ' wpiDatepicker';
     }
 
-    return wpinv_html_text( $args );
+    return wpinv_html_text($args);
 }
 
-function wpinv_html_textarea( $args = array() ) {
+function wpinv_html_textarea($args = array()) {
     $defaults = array(
         'name'        => 'textarea',
         'value'       => null,
@@ -688,31 +688,31 @@ 
         'placeholder' => '',
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $disabled = '';
-    if( $args['disabled'] ) {
+    if ($args['disabled']) {
         $disabled = ' disabled="disabled"';
     }
 
-    $output = '<span id="wpinv-' . wpinv_sanitize_key( $args['name'] ) . '-wrap">';
-    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key( $args['name'] ) . '">' . esc_html( $args['label'] ) . '</label>';
-    $output .= '<textarea name="' . esc_attr( $args['name'] ) . '" placeholder="' . esc_attr( $args['placeholder'] ) . '" id="' . wpinv_sanitize_key( $args['name'] ) . '" class="' . $class . '"' . $disabled . '>' . esc_attr( $args['value'] ) . '</textarea>';
+    $output = '<span id="wpinv-' . wpinv_sanitize_key($args['name']) . '-wrap">';
+    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key($args['name']) . '">' . esc_html($args['label']) . '</label>';
+    $output .= '<textarea name="' . esc_attr($args['name']) . '" placeholder="' . esc_attr($args['placeholder']) . '" id="' . wpinv_sanitize_key($args['name']) . '" class="' . $class . '"' . $disabled . '>' . esc_attr($args['value']) . '</textarea>';
 
-    if ( ! empty( $args['desc'] ) ) {
-        $output .= '<span class="wpinv-description">' . esc_html( $args['desc'] ) . '</span>';
+    if (!empty($args['desc'])) {
+        $output .= '<span class="wpinv-description">' . esc_html($args['desc']) . '</span>';
     }
     $output .= '</span>';
 
     return $output;
 }
 
-function wpinv_html_ajax_user_search( $args = array() ) {
+function wpinv_html_ajax_user_search($args = array()) {
     $defaults = array(
         'name'        => 'user_id',
         'value'       => null,
-        'placeholder' => __( 'Enter username', 'invoicing' ),
+        'placeholder' => __('Enter username', 'invoicing'),
         'label'       => null,
         'desc'        => null,
         'class'       => '',
@@ -721,13 +721,13 @@ 
         'data'        => false
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $args['class'] = 'wpinv-ajax-user-search ' . $args['class'];
 
     $output  = '<span class="wpinv_user_search_wrap">';
-        $output .= wpinv_html_text( $args );
-        $output .= '<span class="wpinv_user_search_results hidden"><a class="wpinv-ajax-user-cancel" title="' . __( 'Cancel', 'invoicing' ) . '" aria-label="' . __( 'Cancel', 'invoicing' ) . '" href="#">x</a><span></span></span>';
+        $output .= wpinv_html_text($args);
+        $output .= '<span class="wpinv_user_search_results hidden"><a class="wpinv-ajax-user-cancel" title="' . __('Cancel', 'invoicing') . '" aria-label="' . __('Cancel', 'invoicing') . '" href="#">x</a><span></span></span>';
     $output .= '</span>';
 
     return $output;
@@ -743,20 +743,20 @@ 
  * 
  * @param string $template the template that is currently being used.
  */
-function wpinv_template( $template ) {
+function wpinv_template($template) {
     global $post;
 
-    if ( ! is_admin() && ( is_single() || is_404() ) && ! empty( $post->ID ) && getpaid_is_invoice_post_type( get_post_type( $post->ID ) ) ) {
+    if (!is_admin() && (is_single() || is_404()) && !empty($post->ID) && getpaid_is_invoice_post_type(get_post_type($post->ID))) {
 
         // If the user can view this invoice, display it.
-        if ( wpinv_user_can_view_invoice( $post->ID ) ) {
+        if (wpinv_user_can_view_invoice($post->ID)) {
 
-            return wpinv_get_template_part( 'wpinv-invoice-print', false, false );
+            return wpinv_get_template_part('wpinv-invoice-print', false, false);
 
         // Else display an error message.
         } else {
 
-            return wpinv_get_template_part( 'wpinv-invalid-access', false, false );
+            return wpinv_get_template_part('wpinv-invalid-access', false, false);
 
         }
 
@@ -764,46 +764,46 @@ 
 
     return $template;
 }
-add_filter( 'template_include', 'wpinv_template', 10, 1 );
+add_filter('template_include', 'wpinv_template', 10, 1);
 
 function wpinv_get_business_address() {
     $business_address   = wpinv_store_address();
-    $business_address   = !empty( $business_address ) ? wpautop( wp_kses_post( $business_address ) ) : '';
+    $business_address   = !empty($business_address) ? wpautop(wp_kses_post($business_address)) : '';
     
     $business_address = $business_address ? '<div class="address">' . $business_address . '</div>' : '';
     
-    return apply_filters( 'wpinv_get_business_address', $business_address );
+    return apply_filters('wpinv_get_business_address', $business_address);
 }
 
 /**
  * Displays the company address.
  */
 function wpinv_display_from_address() {
-    wpinv_get_template( 'invoice/company-address.php' );
+    wpinv_get_template('invoice/company-address.php');
 }
-add_action( 'getpaid_invoice_details_left', 'wpinv_display_from_address', 10 );
+add_action('getpaid_invoice_details_left', 'wpinv_display_from_address', 10);
 
-function wpinv_watermark( $id = 0 ) {
-    $output = wpinv_get_watermark( $id );
-    return apply_filters( 'wpinv_get_watermark', $output, $id );
+function wpinv_watermark($id = 0) {
+    $output = wpinv_get_watermark($id);
+    return apply_filters('wpinv_get_watermark', $output, $id);
 }
 
-function wpinv_get_watermark( $id ) {
-    if ( !$id > 0 ) {
+function wpinv_get_watermark($id) {
+    if (!$id > 0) {
         return NULL;
     }
 
-    $invoice = wpinv_get_invoice( $id );
+    $invoice = wpinv_get_invoice($id);
     
-    if ( !empty( $invoice ) && "wpi_invoice" === $invoice->post_type ) {
-        if ( $invoice->is_paid() ) {
-            return __( 'Paid', 'invoicing' );
+    if (!empty($invoice) && "wpi_invoice" === $invoice->post_type) {
+        if ($invoice->is_paid()) {
+            return __('Paid', 'invoicing');
         }
-        if ( $invoice->is_refunded() ) {
-            return __( 'Refunded', 'invoicing' );
+        if ($invoice->is_refunded()) {
+            return __('Refunded', 'invoicing');
         }
-        if ( $invoice->has_status( array( 'wpi-cancelled' ) ) ) {
-            return __( 'Cancelled', 'invoicing' );
+        if ($invoice->has_status(array('wpi-cancelled'))) {
+            return __('Cancelled', 'invoicing');
         }
     }
     
@@ -813,140 +813,140 @@ 
 /**
  * @deprecated
  */
-function wpinv_display_invoice_details( $invoice ) {
-    return getpaid_invoice_meta( $invoice );
+function wpinv_display_invoice_details($invoice) {
+    return getpaid_invoice_meta($invoice);
 }
 
 /**
  * Displays invoice meta.
  */
-function getpaid_invoice_meta( $invoice ) {
+function getpaid_invoice_meta($invoice) {
 
-    $invoice = new WPInv_Invoice( $invoice );
+    $invoice = new WPInv_Invoice($invoice);
 
     // Ensure that we have an invoice.
-    if ( 0 == $invoice->get_id() ) {
+    if (0 == $invoice->get_id()) {
         return;
     }
 
     // Load the invoice meta.
-    $meta    = array(
+    $meta = array(
 
         'number' => array(
             'label' => sprintf(
-                __( '%s Number', 'invoicing' ),
-                ucfirst( $invoice->get_type() )
+                __('%s Number', 'invoicing'),
+                ucfirst($invoice->get_type())
             ),
-            'value' => sanitize_text_field( $invoice->get_number() ),
+            'value' => sanitize_text_field($invoice->get_number()),
         ),
 
         'status' => array(
             'label' => sprintf(
-                __( '%s Status', 'invoicing' ),
-                ucfirst( $invoice->get_type() )
+                __('%s Status', 'invoicing'),
+                ucfirst($invoice->get_type())
             ),
-            'value' => sanitize_text_field( $invoice->get_status_nicename() ),
+            'value' => sanitize_text_field($invoice->get_status_nicename()),
         ),
 
         'date' => array(
             'label' => sprintf(
-                __( '%s Date', 'invoicing' ),
-                ucfirst( $invoice->get_type() )
+                __('%s Date', 'invoicing'),
+                ucfirst($invoice->get_type())
             ),
-            'value' => getpaid_format_date( $invoice->get_created_date() ),
+            'value' => getpaid_format_date($invoice->get_created_date()),
         ),
 
         'date_paid' => array(
-            'label' => __( 'Paid On', 'invoicing' ),
-            'value' => getpaid_format_date( $invoice->get_completed_date() ),
+            'label' => __('Paid On', 'invoicing'),
+            'value' => getpaid_format_date($invoice->get_completed_date()),
         ),
 
         'gateway'   => array(
-            'label' => __( 'Payment Method', 'invoicing' ),
-            'value' => sanitize_text_field( $invoice->get_gateway_title() ),
+            'label' => __('Payment Method', 'invoicing'),
+            'value' => sanitize_text_field($invoice->get_gateway_title()),
         ),
 
         'transaction_id' => array(
-            'label' => __( 'Transaction ID', 'invoicing' ),
-            'value' => sanitize_text_field( $invoice->get_transaction_id() ),
+            'label' => __('Transaction ID', 'invoicing'),
+            'value' => sanitize_text_field($invoice->get_transaction_id()),
         ),
 
         'due_date'  => array(
-            'label' => __( 'Due Date', 'invoicing' ),
-            'value' => getpaid_format_date( $invoice->get_due_date() ),
+            'label' => __('Due Date', 'invoicing'),
+            'value' => getpaid_format_date($invoice->get_due_date()),
         ),
 
         'vat_number' => array(
             'label' => sprintf(
-                __( '%s Number', 'invoicing' ),
+                __('%s Number', 'invoicing'),
                 getpaid_tax()->get_vat_name()
             ),
-            'value' => sanitize_text_field( $invoice->get_vat_number() ),
+            'value' => sanitize_text_field($invoice->get_vat_number()),
         ),
 
     );
 
     // If it is not paid, remove the date of payment.
-    if ( ! $invoice->is_paid() ) {
-        unset( $meta[ 'date_paid' ] );
-        unset( $meta[ 'transaction_id' ] );
+    if (!$invoice->is_paid()) {
+        unset($meta['date_paid']);
+        unset($meta['transaction_id']);
     }
 
-    if ( ! $invoice->is_paid() || 'none' == $invoice->get_gateway() ) {
-        unset( $meta[ 'gateway' ] );
+    if (!$invoice->is_paid() || 'none' == $invoice->get_gateway()) {
+        unset($meta['gateway']);
     }
 
     // Only display the due date if due dates are enabled.
-    if ( ! $invoice->needs_payment() || ! wpinv_get_option( 'overdue_active' ) ) {
-        unset( $meta[ 'due_date' ] );
+    if (!$invoice->needs_payment() || !wpinv_get_option('overdue_active')) {
+        unset($meta['due_date']);
     }
 
     // Only display the vat number if taxes are enabled.
-    if ( ! wpinv_use_taxes() ) {
-        unset( $meta[ 'vat_number' ] );
+    if (!wpinv_use_taxes()) {
+        unset($meta['vat_number']);
     }
 
-    if ( $invoice->is_recurring() ) {
+    if ($invoice->is_recurring()) {
 
         // Link to the parent invoice.
-        if ( $invoice->is_renewal() ) {
+        if ($invoice->is_renewal()) {
 
-            $meta[ 'parent' ] = array(
+            $meta['parent'] = array(
 
                 'label' => sprintf(
-                    __( 'Parent %s', 'invoicing' ),
-                    ucfirst( $invoice->get_type() )
+                    __('Parent %s', 'invoicing'),
+                    ucfirst($invoice->get_type())
                 ),
 
-                'value' => wpinv_invoice_link( $invoice->get_parent_id() ),
+                'value' => wpinv_invoice_link($invoice->get_parent_id()),
 
             );
 
         }
 
-        $subscription = wpinv_get_subscription( $invoice );
+        $subscription = wpinv_get_subscription($invoice);
 
-        if ( ! empty ( $subscription ) ) {
+        if (!empty ($subscription)) {
 
             // Display the renewal date.
-            if ( $subscription->is_active() && 'cancelled' != $subscription->status ) {
+            if ($subscription->is_active() && 'cancelled' != $subscription->status) {
 
-                $meta[ 'renewal_date' ] = array(
+                $meta['renewal_date'] = array(
 
-                    'label' => __( 'Renews On', 'invoicing' ),
-                    'value' => getpaid_format_date( $subscription->expiration ),
+                    'label' => __('Renews On', 'invoicing'),
+                    'value' => getpaid_format_date($subscription->expiration),
         
                 );
 
             }
 
-            if ( $invoice->is_parent() ) {
+            if ($invoice->is_parent()) {
 
                 // Display the recurring amount.
-                $meta[ 'recurring_total' ] = array(
+                $meta['recurring_total'] = array(
 
-                    'label' => __( 'Recurring Amount', 'invoicing' ),
-                    'value' => wpinv_price( wpinv_format_amount( $subscription->recurring_amount ), $invoice->get_currency() ),
+                    'label' => __('Recurring Amount', 'invoicing'),
+                    'value' => wpinv_price(wpinv_format_amount($subscription->recurring_amount), $invoice->get_currency()),
         
                 );
 
@@ -956,20 +956,20 @@ 
     }
 
     // Add the invoice total to the meta.
-    $meta[ 'invoice_total' ] = array(
+    $meta['invoice_total'] = array(
 
-        'label' => __( 'Total Amount', 'invoicing' ),
-        'value' => wpinv_price( wpinv_format_amount( $invoice->get_total() ), $invoice->get_currency() ),
+        'label' => __('Total Amount', 'invoicing'),
+        'value' => wpinv_price(wpinv_format_amount($invoice->get_total()), $invoice->get_currency()),
 
     );
 
     // Provide a way for third party plugins to filter the meta.
-    $meta = apply_filters( 'getpaid_invoice_meta_data', $meta, $invoice );
+    $meta = apply_filters('getpaid_invoice_meta_data', $meta, $invoice);
 
-    wpinv_get_template( 'invoice/invoice-meta.php', compact( 'invoice', 'meta' ) );
+    wpinv_get_template('invoice/invoice-meta.php', compact('invoice', 'meta'));
 
 }
-add_action( 'getpaid_invoice_details_right', 'getpaid_invoice_meta', 10 );
+add_action('getpaid_invoice_details_right', 'getpaid_invoice_meta', 10);
 
 /**
  * Retrieves the address markup to use on Invoices.
@@ -981,29 +981,29 @@ 
  * @param  string $separator How to separate address lines.
  * @return string
  */
-function wpinv_get_invoice_address_markup( $billing_details, $separator = '<br/>' ) {
+function wpinv_get_invoice_address_markup($billing_details, $separator = '<br/>') {
 
     // Retrieve the address markup...
-    $country= empty( $billing_details['country'] ) ? '' : $billing_details['country'];
-    $format = wpinv_get_full_address_format( $country );
+    $country = empty($billing_details['country']) ? '' : $billing_details['country'];
+    $format = wpinv_get_full_address_format($country);
 
     // ... and the replacements.
-    $replacements = wpinv_get_invoice_address_replacements( $billing_details );
+    $replacements = wpinv_get_invoice_address_replacements($billing_details);
 
-    $formatted_address = str_ireplace( array_keys( $replacements ), $replacements, $format );
+    $formatted_address = str_ireplace(array_keys($replacements), $replacements, $format);
     
 	// Remove unavailable tags.
-    $formatted_address = preg_replace( "/\{\{\w+\}\}/", '', $formatted_address );
+    $formatted_address = preg_replace("/\{\{\w+\}\}/", '', $formatted_address);
 
     // Clean up white space.
-	$formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
-    $formatted_address = preg_replace( '/\n\n+/', "\n", $formatted_address );
+	$formatted_address = preg_replace('/  +/', ' ', trim($formatted_address));
+    $formatted_address = preg_replace('/\n\n+/', "\n", $formatted_address);
     
     // Break newlines apart and remove empty lines/trim commas and white space.
-	$formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
+	$formatted_address = array_filter(array_map('wpinv_trim_formatted_address_line', explode("\n", $formatted_address)));
 
     // Add html breaks.
-	$formatted_address = implode( $separator, $formatted_address );
+	$formatted_address = implode($separator, $formatted_address);
 
 	// We're done!
 	return $formatted_address;
@@ -1015,88 +1015,88 @@ 
  * 
  * @param WPInv_Invoice $invoice
  */
-function wpinv_display_to_address( $invoice = 0 ) {
-    if ( ! empty( $invoice ) ) {
-        wpinv_get_template( 'invoice/billing-address.php', compact( 'invoice' ) );
+function wpinv_display_to_address($invoice = 0) {
+    if (!empty($invoice)) {
+        wpinv_get_template('invoice/billing-address.php', compact('invoice'));
     }
 }
-add_action( 'getpaid_invoice_details_left', 'wpinv_display_to_address', 40 );
+add_action('getpaid_invoice_details_left', 'wpinv_display_to_address', 40);
 
 
 /**
  * Displays invoice line items.
  */
-function wpinv_display_line_items( $invoice_id = 0 ) {
+function wpinv_display_line_items($invoice_id = 0) {
 
     // Prepare the invoice.
-    $invoice = new WPInv_Invoice( $invoice_id );
+    $invoice = new WPInv_Invoice($invoice_id);
 
     // Abort if there is no invoice.
-    if ( 0 == $invoice->get_id() ) {
+    if (0 == $invoice->get_id()) {
         return;
     }
 
     // Line item columns.
-    $columns = getpaid_invoice_item_columns( $invoice );
-    $columns = apply_filters( 'getpaid_invoice_line_items_table_columns', $columns, $invoice );
+    $columns = getpaid_invoice_item_columns($invoice);
+    $columns = apply_filters('getpaid_invoice_line_items_table_columns', $columns, $invoice);
 
-    wpinv_get_template( 'invoice/line-items.php', compact( 'invoice', 'columns' ) );
+    wpinv_get_template('invoice/line-items.php', compact('invoice', 'columns'));
 }
-add_action( 'getpaid_invoice_line_items', 'wpinv_display_line_items', 10 );
+add_action('getpaid_invoice_line_items', 'wpinv_display_line_items', 10);
 
 /**
  * Displays invoice notices on invoices.
  */
 function wpinv_display_invoice_notice() {
 
-    $label  = wpinv_get_option( 'vat_invoice_notice_label' );
-    $notice = wpinv_get_option( 'vat_invoice_notice' );
+    $label  = wpinv_get_option('vat_invoice_notice_label');
+    $notice = wpinv_get_option('vat_invoice_notice');
 
-    if ( empty( $label ) && empty( $notice ) ) {
+    if (empty($label) && empty($notice)) {
         return;
     }
 
     echo '<div class="mt-4 mb-4 wpinv-vat-notice">';
 
-    if ( ! empty( $label ) ) {
-        $label = sanitize_text_field( $label );
+    if (!empty($label)) {
+        $label = sanitize_text_field($label);
         echo "<h5>$label</h5>";
     }
 
-    if ( ! empty( $notice ) ) {
-        echo '<small class="form-text text-muted">' . wpautop( wptexturize( $notice ) ) . '</small>';
+    if (!empty($notice)) {
+        echo '<small class="form-text text-muted">' . wpautop(wptexturize($notice)) . '</small>';
     }
 
     echo '</div>';
 }
-add_action( 'getpaid_invoice_line_items', 'wpinv_display_invoice_notice', 100 );
+add_action('getpaid_invoice_line_items', 'wpinv_display_invoice_notice', 100);
 
 /**
  * @param WPInv_Invoice $invoice
  */
-function wpinv_display_invoice_notes( $invoice ) {
+function wpinv_display_invoice_notes($invoice) {
 
     // Retrieve the notes.
-    $notes = wpinv_get_invoice_notes( $invoice->get_id(), 'customer' );
+    $notes = wpinv_get_invoice_notes($invoice->get_id(), 'customer');
 
     // Abort if we have non.
-    if ( empty( $notes ) ) {
+    if (empty($notes)) {
         return;
     }
 
     // Echo the note.
     echo '<div class="getpaid-invoice-notes-wrapper border position-relative w-100 mb-4 p-0">';
-    echo '<h3 class="getpaid-invoice-notes-title text-dark bg-light border-bottom m-0 d-block">' . __( 'Notes', 'invoicing' ) .'</h3>';
+    echo '<h3 class="getpaid-invoice-notes-title text-dark bg-light border-bottom m-0 d-block">' . __('Notes', 'invoicing') . '</h3>';
     echo '<ul class="getpaid-invoice-notes mt-4 p-0">';
 
-    foreach( $notes as $note ) {
-        wpinv_get_invoice_note_line_item( $note );
+    foreach ($notes as $note) {
+        wpinv_get_invoice_note_line_item($note);
     }
 
     echo '</ul>';
     echo '</div>';
 }
-add_action( 'getpaid_invoice_line_items', 'wpinv_display_invoice_notes', 60 );
+add_action('getpaid_invoice_line_items', 'wpinv_display_invoice_notes', 60);
 
 /**
  * Loads scripts on our invoice templates.
@@ -1104,32 +1104,32 @@ 
 function wpinv_display_style() {
 
     // Make sure that all scripts have been loaded.
-    if ( ! did_action( 'wp_enqueue_scripts' ) ) {
-        do_action( 'wp_enqueue_scripts' );
+    if (!did_action('wp_enqueue_scripts')) {
+        do_action('wp_enqueue_scripts');
     }
 
     // Register the invoices style.
-    wp_register_style( 'wpinv-single-style', WPINV_PLUGIN_URL . 'assets/css/invoice.css', array(), filemtime( WPINV_PLUGIN_DIR . 'assets/css/invoice.css' ) );
+    wp_register_style('wpinv-single-style', WPINV_PLUGIN_URL . 'assets/css/invoice.css', array(), filemtime(WPINV_PLUGIN_DIR . 'assets/css/invoice.css'));
 
     // Load required styles
-    wp_print_styles( 'open-sans' );
-    wp_print_styles( 'wpinv-single-style' );
-    wp_print_styles( 'ayecode-ui' );
+    wp_print_styles('open-sans');
+    wp_print_styles('wpinv-single-style');
+    wp_print_styles('ayecode-ui');
 
     // Maybe load custom css.
-    $custom_css = wpinv_get_option( 'template_custom_css' );
+    $custom_css = wpinv_get_option('template_custom_css');
 
-    if ( isset( $custom_css ) && ! empty( $custom_css ) ) {
-        $custom_css     = wp_kses( $custom_css, array( '\'', '\"' ) );
-        $custom_css     = str_replace( '&gt;', '>', $custom_css );
+    if (isset($custom_css) && !empty($custom_css)) {
+        $custom_css     = wp_kses($custom_css, array('\'', '\"'));
+        $custom_css     = str_replace('&gt;', '>', $custom_css);
         echo '<style type="text/css">';
         echo $custom_css;
         echo '</style>';
     }
 
 }
-add_action( 'wpinv_invoice_print_head', 'wpinv_display_style' );
-add_action( 'wpinv_invalid_invoice_head', 'wpinv_display_style' );
+add_action('wpinv_invoice_print_head', 'wpinv_display_style');
+add_action('wpinv_invalid_invoice_head', 'wpinv_display_style');
 
 
 /**
@@ -1141,41 +1141,41 @@ 
     // Retrieve the current invoice.
     $invoice_id = getpaid_get_current_invoice_id();
 
-    if ( empty( $invoice_id ) ) {
+    if (empty($invoice_id)) {
 
         return aui()->alert(
             array(
                 'type'    => 'warning',
-                'content' => __( 'Invalid invoice', 'invoicing' ),
+                'content' => __('Invalid invoice', 'invoicing'),
             )
         );
 
     }
 
     // Can the user view this invoice?
-    if ( ! wpinv_user_can_view_invoice( $invoice_id ) ) {
+    if (!wpinv_user_can_view_invoice($invoice_id)) {
 
         return aui()->alert(
             array(
                 'type'    => 'warning',
-                'content' => __( 'You are not allowed to view this invoice', 'invoicing' ),
+                'content' => __('You are not allowed to view this invoice', 'invoicing'),
             )
         );
 
     }
 
     // Ensure that it is not yet paid for.
-    $invoice = new WPInv_Invoice( $invoice_id );
+    $invoice = new WPInv_Invoice($invoice_id);
 
     // Maybe mark it as viewed.
-    getpaid_maybe_mark_invoice_as_viewed( $invoice );
+    getpaid_maybe_mark_invoice_as_viewed($invoice);
 
-    if ( $invoice->is_paid() ) {
+    if ($invoice->is_paid()) {
 
         return aui()->alert(
             array(
                 'type'    => 'success',
-                'content' => __( 'This invoice has already been paid.', 'invoicing' ),
+                'content' => __('This invoice has already been paid.', 'invoicing'),
             )
         );
 
@@ -1185,14 +1185,14 @@ 
     $wpi_checkout_id = $invoice_id;
 
     // We'll display this invoice via the default form.
-    $form = new GetPaid_Payment_Form( wpinv_get_default_payment_form() );
+    $form = new GetPaid_Payment_Form(wpinv_get_default_payment_form());
 
-    if ( 0 == $form->get_id() ) {
+    if (0 == $form->get_id()) {
 
         return aui()->alert(
             array(
                 'type'    => 'warning',
-                'content' => __( 'Error loading the payment form', 'invoicing' ),
+                'content' => __('Error loading the payment form', 'invoicing'),
             )
         );
 
@@ -1200,7 +1200,7 @@ 
 
     // Set the invoice.
     $form->invoice = $invoice;
-    $form->set_items( $invoice->get_items() );
+    $form->set_items($invoice->get_items());
 
     // Generate the html.
     return $form->get_html();
@@ -1208,7 +1208,7 @@ 
 }
 
 function wpinv_empty_cart_message() {
-	return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
+	return apply_filters('wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __('Your cart is empty.', 'invoicing') . '</span>');
 }
 
 /**
@@ -1225,38 +1225,38 @@ 
         )
     );
 }
-add_action( 'wpinv_cart_empty', 'wpinv_empty_checkout_cart' );
+add_action('wpinv_cart_empty', 'wpinv_empty_checkout_cart');
 
-function wpinv_receipt_billing_address( $invoice_id = 0 ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_receipt_billing_address($invoice_id = 0) {
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
 
     $billing_details = $invoice->get_user_info();
-    $address_row = wpinv_get_invoice_address_markup( $billing_details );
+    $address_row = wpinv_get_invoice_address_markup($billing_details);
 
     ob_start();
     ?>
     <table class="table table-bordered table-sm wpi-billing-details">
         <tbody>
             <tr class="wpi-receipt-name">
-                <th class="text-left"><?php _e( 'Name', 'invoicing' ); ?></th>
-                <td><?php echo esc_html( trim( $billing_details['first_name'] . ' ' . $billing_details['last_name'] ) ) ;?></td>
+                <th class="text-left"><?php _e('Name', 'invoicing'); ?></th>
+                <td><?php echo esc_html(trim($billing_details['first_name'] . ' ' . $billing_details['last_name'])); ?></td>
             </tr>
             <tr class="wpi-receipt-email">
-                <th class="text-left"><?php _e( 'Email', 'invoicing' ); ?></th>
-                <td><?php echo $billing_details['email'] ;?></td>
+                <th class="text-left"><?php _e('Email', 'invoicing'); ?></th>
+                <td><?php echo $billing_details['email']; ?></td>
             </tr>
             <tr class="wpi-receipt-address">
-                <th class="text-left"><?php _e( 'Address', 'invoicing' ); ?></th>
-                <td><?php echo $address_row ;?></td>
+                <th class="text-left"><?php _e('Address', 'invoicing'); ?></th>
+                <td><?php echo $address_row; ?></td>
             </tr>
-            <?php if ( $billing_details['phone'] ) { ?>
+            <?php if ($billing_details['phone']) { ?>
             <tr class="wpi-receipt-phone">
-                <th class="text-left"><?php _e( 'Phone', 'invoicing' ); ?></th>
-                <td><?php echo esc_html( $billing_details['phone'] ) ;?></td>
+                <th class="text-left"><?php _e('Phone', 'invoicing'); ?></th>
+                <td><?php echo esc_html($billing_details['phone']); ?></td>
             </tr>
             <?php } ?>
         </tbody>
@@ -1264,7 +1264,7 @@ 
     <?php
     $output = ob_get_clean();
     
-    $output = apply_filters( 'wpinv_receipt_billing_address', $output, $invoice_id );
+    $output = apply_filters('wpinv_receipt_billing_address', $output, $invoice_id);
 
     echo $output;
 }
@@ -1272,56 +1272,56 @@ 
 /**
  * Filters the receipt page.
  */
-function wpinv_filter_success_page_content( $content ) {
+function wpinv_filter_success_page_content($content) {
 
     // Ensure this is our page.
-    if ( isset( $_GET['payment-confirm'] ) && wpinv_is_success_page() ) {
+    if (isset($_GET['payment-confirm']) && wpinv_is_success_page()) {
 
-        $gateway = sanitize_text_field( $_GET['payment-confirm'] );
-        return apply_filters( "wpinv_payment_confirm_$gateway", $content );
+        $gateway = sanitize_text_field($_GET['payment-confirm']);
+        return apply_filters("wpinv_payment_confirm_$gateway", $content);
 
     }
 
     return $content;
 }
-add_filter( 'the_content', 'wpinv_filter_success_page_content', 99999 );
+add_filter('the_content', 'wpinv_filter_success_page_content', 99999);
 
-function wpinv_invoice_link( $invoice_id ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_invoice_link($invoice_id) {
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
 
-    $invoice_link = '<a href="' . esc_url( $invoice->get_view_url() ) . '">' . $invoice->get_number() . '</a>';
+    $invoice_link = '<a href="' . esc_url($invoice->get_view_url()) . '">' . $invoice->get_number() . '</a>';
 
-    return apply_filters( 'wpinv_get_invoice_link', $invoice_link, $invoice );
+    return apply_filters('wpinv_get_invoice_link', $invoice_link, $invoice);
 }
 
-function wpinv_invoice_subscription_details( $invoice ) {
-    if ( !empty( $invoice ) && $invoice->is_recurring() && ! wpinv_is_subscription_payment( $invoice ) ) {
-        $subscription = wpinv_get_subscription( $invoice, true );
+function wpinv_invoice_subscription_details($invoice) {
+    if (!empty($invoice) && $invoice->is_recurring() && !wpinv_is_subscription_payment($invoice)) {
+        $subscription = wpinv_get_subscription($invoice, true);
 
-        if ( empty( $subscription ) ) {
+        if (empty($subscription)) {
             return;
         }
 
         $frequency = WPInv_Subscriptions::wpinv_get_pretty_subscription_frequency($subscription->period, $subscription->frequency);
-        $billing = wpinv_price(wpinv_format_amount($subscription->recurring_amount), $invoice->get_currency() ) . ' / ' . $frequency;
-        $initial = wpinv_price(wpinv_format_amount($subscription->initial_amount), $invoice->get_currency() );
+        $billing = wpinv_price(wpinv_format_amount($subscription->recurring_amount), $invoice->get_currency()) . ' / ' . $frequency;
+        $initial = wpinv_price(wpinv_format_amount($subscription->initial_amount), $invoice->get_currency());
 
         $payments = $subscription->get_child_payments();
         ?>
         <div class="wpinv-subscriptions-details">
-            <h3 class="wpinv-subscriptions-t"><?php echo apply_filters( 'wpinv_subscription_details_title', __( 'Subscription Details', 'invoicing' ) ); ?></h3>
+            <h3 class="wpinv-subscriptions-t"><?php echo apply_filters('wpinv_subscription_details_title', __('Subscription Details', 'invoicing')); ?></h3>
             <table class="table">
                 <thead>
                     <tr>
-                        <th><?php _e( 'Billing Cycle', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Start Date', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Expiration Date', 'invoicing' ) ;?></th>
-                        <th class="text-center"><?php _e( 'Times Billed', 'invoicing' ) ;?></th>
-                        <th class="text-center"><?php _e( 'Status', 'invoicing' ) ;?></th>
+                        <th><?php _e('Billing Cycle', 'invoicing'); ?></th>
+                        <th><?php _e('Start Date', 'invoicing'); ?></th>
+                        <th><?php _e('Expiration Date', 'invoicing'); ?></th>
+                        <th class="text-center"><?php _e('Times Billed', 'invoicing'); ?></th>
+                        <th class="text-center"><?php _e('Status', 'invoicing'); ?></th>
                     </tr>
                 </thead>
                 <tbody>
@@ -1329,35 +1329,35 @@ 
                         <td><?php printf(_x('%s then %s', 'Initial subscription amount then billing cycle and amount', 'invoicing'), $initial, $billing); ?></td>
                         <td><?php echo date_i18n(get_option('date_format'), strtotime($subscription->created, current_time('timestamp'))); ?></td>
                         <td><?php echo date_i18n(get_option('date_format'), strtotime($subscription->expiration, current_time('timestamp'))); ?></td>
-                        <td class="text-center"><?php echo $subscription->get_times_billed() . ' / ' . (($subscription->bill_times == 0) ? __( 'Until Cancelled', 'invoicing' ) : $subscription->bill_times); ?></td>
+                        <td class="text-center"><?php echo $subscription->get_times_billed() . ' / ' . (($subscription->bill_times == 0) ? __('Until Cancelled', 'invoicing') : $subscription->bill_times); ?></td>
                         <td class="text-center wpi-sub-status"><?php echo $subscription->get_status_label(); ?></td>
                     </tr>
                 </tbody>
             </table>
         </div>
-        <?php if ( !empty( $payments ) ) { ?>
+        <?php if (!empty($payments)) { ?>
         <div class="wpinv-renewal-payments">
-            <h3 class="wpinv-renewals-t"><?php echo apply_filters( 'wpinv_renewal_payments_title', __( 'Renewal Payments', 'invoicing' ) ); ?></h3>
+            <h3 class="wpinv-renewals-t"><?php echo apply_filters('wpinv_renewal_payments_title', __('Renewal Payments', 'invoicing')); ?></h3>
             <table class="table">
                 <thead>
                     <tr>
                         <th>#</th>
-                        <th><?php _e( 'Invoice', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Date', 'invoicing' ) ;?></th>
-                        <th class="text-right"><?php _e( 'Amount', 'invoicing' ) ;?></th>
+                        <th><?php _e('Invoice', 'invoicing'); ?></th>
+                        <th><?php _e('Date', 'invoicing'); ?></th>
+                        <th class="text-right"><?php _e('Amount', 'invoicing'); ?></th>
                     </tr>
                 </thead>
                 <tbody>
                     <?php
                         $i = 1;
-                        foreach ( $payments as $payment ) {
+                        foreach ($payments as $payment) {
                             $invoice_id = $payment->ID;
                     ?>
                     <tr>
-                        <th scope="row"><?php echo $i;?></th>
-                        <td><?php echo wpinv_invoice_link( $invoice_id ) ;?></td>
+                        <th scope="row"><?php echo $i; ?></th>
+                        <td><?php echo wpinv_invoice_link($invoice_id); ?></td>
                         <td><?php echo$invoice->get_date_created(); ?></td>
-                        <td class="text-right"><?php echo wpinv_price( wpinv_format_amount( $invoice->get_total() ), $invoice->get_currency() ); ?></td>
+                        <td class="text-right"><?php echo wpinv_price(wpinv_format_amount($invoice->get_total()), $invoice->get_currency()); ?></td>
                     </tr>
                     <?php $i++; } ?>
                 </tbody>
@@ -1367,64 +1367,64 @@ 
         <?php
     }
 }
-add_action( 'getpaid_invoice_line_items', 'wpinv_invoice_subscription_details', 20 );
+add_action('getpaid_invoice_line_items', 'wpinv_invoice_subscription_details', 20);
 
-function wpinv_cart_total_label( $label, $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_cart_total_label($label, $invoice) {
+    if (empty($invoice)) {
         return $label;
     }
 
     $prefix_label = '';
-    if ( $invoice->is_parent() && $item_id = $invoice->get_recurring() ) {
-        $prefix_label   = '<span class="label label-primary label-recurring">' . __( 'Recurring Payment', 'invoicing' ) . '</span> ' . wpinv_subscription_payment_desc( $invoice );
-    } else if ( $invoice->is_renewal() ) {
-        $prefix_label   = '<span class="label label-primary label-renewal">' . __( 'Renewal Payment', 'invoicing' ) . '</span> ';        
+    if ($invoice->is_parent() && $item_id = $invoice->get_recurring()) {
+        $prefix_label   = '<span class="label label-primary label-recurring">' . __('Recurring Payment', 'invoicing') . '</span> ' . wpinv_subscription_payment_desc($invoice);
+    } else if ($invoice->is_renewal()) {
+        $prefix_label   = '<span class="label label-primary label-renewal">' . __('Renewal Payment', 'invoicing') . '</span> ';        
     }
 
-    if ( $prefix_label != '' ) {
-        $label  = '<span class="wpinv-cart-sub-desc">' . $prefix_label . '</span> ' . $label;
+    if ($prefix_label != '') {
+        $label = '<span class="wpinv-cart-sub-desc">' . $prefix_label . '</span> ' . $label;
     }
 
     return $label;
 }
-add_filter( 'wpinv_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
-add_filter( 'wpinv_email_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
-add_filter( 'wpinv_print_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
+add_filter('wpinv_cart_total_label', 'wpinv_cart_total_label', 10, 2);
+add_filter('wpinv_email_cart_total_label', 'wpinv_cart_total_label', 10, 2);
+add_filter('wpinv_print_cart_total_label', 'wpinv_cart_total_label', 10, 2);
 
-function wpinv_get_invoice_note_line_item( $note, $echo = true ) {
-    if ( empty( $note ) ) {
+function wpinv_get_invoice_note_line_item($note, $echo = true) {
+    if (empty($note)) {
         return NULL;
     }
 
-    if ( is_int( $note ) ) {
-        $note = get_comment( $note );
+    if (is_int($note)) {
+        $note = get_comment($note);
     }
 
-    if ( !( is_object( $note ) && is_a( $note, 'WP_Comment' ) ) ) {
+    if (!(is_object($note) && is_a($note, 'WP_Comment'))) {
         return NULL;
     }
 
-    $note_classes   = array( 'note' );
-    $note_classes[] = get_comment_meta( $note->comment_ID, '_wpi_customer_note', true ) ? 'customer-note' : '';
+    $note_classes   = array('note');
+    $note_classes[] = get_comment_meta($note->comment_ID, '_wpi_customer_note', true) ? 'customer-note' : '';
     $note_classes[] = $note->comment_author === 'System' ? 'system-note' : '';
-    $note_classes   = apply_filters( 'wpinv_invoice_note_class', array_filter( $note_classes ), $note );
-    $note_classes   = !empty( $note_classes ) ? implode( ' ', $note_classes ) : '';
+    $note_classes   = apply_filters('wpinv_invoice_note_class', array_filter($note_classes), $note);
+    $note_classes   = !empty($note_classes) ? implode(' ', $note_classes) : '';
 
     ob_start();
     ?>
-    <li rel="<?php echo absint( $note->comment_ID ) ; ?>" class="<?php echo esc_attr( $note_classes ); ?> mt-4 pl-3 pr-3">
+    <li rel="<?php echo absint($note->comment_ID); ?>" class="<?php echo esc_attr($note_classes); ?> mt-4 pl-3 pr-3">
         <div class="note_content bg-light border position-relative p-4">
 
-            <?php echo wpautop( wptexturize( wp_kses_post( $note->comment_content ) ) ); ?>
+            <?php echo wpautop(wptexturize(wp_kses_post($note->comment_content))); ?>
 
-            <?php if ( ! is_admin() ) : ?>
+            <?php if (!is_admin()) : ?>
                 <em class="meta position-absolute form-text">
                     <?php
                         printf(
-                            __( '%1$s - %2$s at %3$s', 'invoicing' ),
+                            __('%1$s - %2$s at %3$s', 'invoicing'),
                             $note->comment_author,
-                            date_i18n( get_option( 'date_format' ), strtotime( $note->comment_date ) ),
-                            date_i18n( get_option( 'time_format' ), strtotime( $note->comment_date ) )
+                            date_i18n(get_option('date_format'), strtotime($note->comment_date)),
+                            date_i18n(get_option('time_format'), strtotime($note->comment_date))
                         );
                     ?>
                 </em>
@@ -1432,12 +1432,12 @@ 
 
         </div>
 
-        <?php if ( is_admin() ) : ?>
+        <?php if (is_admin()) : ?>
 
             <p class="meta px-4 py-2">
-                <abbr class="exact-date" title="<?php echo esc_attr( $note->comment_date ); ?>"><?php printf( __( '%1$s - %2$s at %3$s', 'invoicing' ), $note->comment_author, date_i18n( get_option( 'date_format' ), strtotime( $note->comment_date ) ), date_i18n( get_option( 'time_format' ), strtotime( $note->comment_date ) ) ); ?></abbr>&nbsp;&nbsp;
-                <?php if ( $note->comment_author !== 'System' && wpinv_current_user_can_manage_invoicing() ) { ?>
-                    <a href="#" class="delete_note"><?php _e( 'Delete note', 'invoicing' ); ?></a>
+                <abbr class="exact-date" title="<?php echo esc_attr($note->comment_date); ?>"><?php printf(__('%1$s - %2$s at %3$s', 'invoicing'), $note->comment_author, date_i18n(get_option('date_format'), strtotime($note->comment_date)), date_i18n(get_option('time_format'), strtotime($note->comment_date))); ?></abbr>&nbsp;&nbsp;
+                <?php if ($note->comment_author !== 'System' && wpinv_current_user_can_manage_invoicing()) { ?>
+                    <a href="#" class="delete_note"><?php _e('Delete note', 'invoicing'); ?></a>
                 <?php } ?>
             </p>
 
@@ -1446,9 +1446,9 @@ 
     </li>
     <?php
     $note_content = ob_get_clean();
-    $note_content = apply_filters( 'wpinv_get_invoice_note_line_item', $note_content, $note, $echo );
+    $note_content = apply_filters('wpinv_get_invoice_note_line_item', $note_content, $note, $echo);
 
-    if ( $echo ) {
+    if ($echo) {
         echo $note_content;
     } else {
         return $note_content;
@@ -1458,36 +1458,36 @@ 
 function wpinv_invalid_invoice_content() {
     global $post;
 
-    $invoice = wpinv_get_invoice( $post->ID );
+    $invoice = wpinv_get_invoice($post->ID);
 
-    $error = __( 'This invoice is only viewable by clicking on the invoice link that was sent to you via email.', 'invoicing' );
-    if ( !empty( $invoice->get_id() ) && $invoice->has_status( array_keys( wpinv_get_invoice_statuses() ) ) ) {
-        if ( is_user_logged_in() ) {
-            if ( wpinv_require_login_to_checkout() ) {
-                if ( isset( $_GET['invoice_key'] ) && $_GET['invoice_key'] === $invoice->get_key() ) {
-                    $error = __( 'You are not allowed to view this invoice.', 'invoicing' );
+    $error = __('This invoice is only viewable by clicking on the invoice link that was sent to you via email.', 'invoicing');
+    if (!empty($invoice->get_id()) && $invoice->has_status(array_keys(wpinv_get_invoice_statuses()))) {
+        if (is_user_logged_in()) {
+            if (wpinv_require_login_to_checkout()) {
+                if (isset($_GET['invoice_key']) && $_GET['invoice_key'] === $invoice->get_key()) {
+                    $error = __('You are not allowed to view this invoice.', 'invoicing');
                 }
             }
         } else {
-            if ( wpinv_require_login_to_checkout() ) {
-                if ( isset( $_GET['invoice_key'] ) && $_GET['invoice_key'] === $invoice->get_key() ) {
-                    $error = __( 'You must be logged in to view this invoice.', 'invoicing' );
+            if (wpinv_require_login_to_checkout()) {
+                if (isset($_GET['invoice_key']) && $_GET['invoice_key'] === $invoice->get_key()) {
+                    $error = __('You must be logged in to view this invoice.', 'invoicing');
                 }
             }
         }
     } else {
-        $error = __( 'This invoice is deleted or does not exist.', 'invoicing' );
+        $error = __('This invoice is deleted or does not exist.', 'invoicing');
     }
     ?>
     <div class="row wpinv-row-invalid">
         <div class="col-md-6 col-md-offset-3 wpinv-message error">
-            <h3><?php _e( 'Access Denied', 'invoicing' ); ?></h3>
+            <h3><?php _e('Access Denied', 'invoicing'); ?></h3>
             <p class="wpinv-msg-text"><?php echo $error; ?></p>
         </div>
     </div>
     <?php
 }
-add_action( 'wpinv_invalid_invoice_content', 'wpinv_invalid_invoice_content' );
+add_action('wpinv_invalid_invoice_content', 'wpinv_invalid_invoice_content');
 
 /**
  * Function to get privacy policy text.
@@ -1496,21 +1496,21 @@ 
  * @return string
  */
 function wpinv_get_policy_text() {
-    $privacy_page_id = get_option( 'wp_page_for_privacy_policy', 0 );
+    $privacy_page_id = get_option('wp_page_for_privacy_policy', 0);
 
-    $text = wpinv_get_option('invoicing_privacy_checkout_message', sprintf( __( 'Your personal data will be used to process your invoice, payment and for other purposes described in our %s.', 'invoicing' ), '[wpinv_privacy_policy]' ));
+    $text = wpinv_get_option('invoicing_privacy_checkout_message', sprintf(__('Your personal data will be used to process your invoice, payment and for other purposes described in our %s.', 'invoicing'), '[wpinv_privacy_policy]'));
 
-    if(!$privacy_page_id){
-        $privacy_page_id = wpinv_get_option( 'privacy_page', 0 );
+    if (!$privacy_page_id) {
+        $privacy_page_id = wpinv_get_option('privacy_page', 0);
     }
 
-    $privacy_link    = $privacy_page_id ? '<a href="' . esc_url( get_permalink( $privacy_page_id ) ) . '" class="wpinv-privacy-policy-link" target="_blank">' . __( 'privacy policy', 'invoicing' ) . '</a>' : __( 'privacy policy', 'invoicing' );
+    $privacy_link = $privacy_page_id ? '<a href="' . esc_url(get_permalink($privacy_page_id)) . '" class="wpinv-privacy-policy-link" target="_blank">' . __('privacy policy', 'invoicing') . '</a>' : __('privacy policy', 'invoicing');
 
     $find_replace = array(
         '[wpinv_privacy_policy]' => $privacy_link,
     );
 
-    $privacy_text = str_replace( array_keys( $find_replace ), array_values( $find_replace ), $text );
+    $privacy_text = str_replace(array_keys($find_replace), array_values($find_replace), $text);
 
     return wp_kses_post(wpautop($privacy_text));
 }
@@ -1518,21 +1518,21 @@ 
 function wpinv_oxygen_fix_conflict() {
     global $ct_ignore_post_types;
 
-    if ( ! is_array( $ct_ignore_post_types ) ) {
+    if (!is_array($ct_ignore_post_types)) {
         $ct_ignore_post_types = array();
     }
 
-    $post_types = array( 'wpi_discount', 'wpi_invoice', 'wpi_item' );
+    $post_types = array('wpi_discount', 'wpi_invoice', 'wpi_item');
 
-    foreach ( $post_types as $post_type ) {
+    foreach ($post_types as $post_type) {
         $ct_ignore_post_types[] = $post_type;
 
         // Ignore post type
-        add_filter( 'pre_option_oxygen_vsb_ignore_post_type_' . $post_type, '__return_true', 999 );
+        add_filter('pre_option_oxygen_vsb_ignore_post_type_' . $post_type, '__return_true', 999);
     }
 
-    remove_filter( 'template_include', 'wpinv_template', 10, 1 );
-    add_filter( 'template_include', 'wpinv_template', 999, 1 );
+    remove_filter('template_include', 'wpinv_template', 10, 1);
+    add_filter('template_include', 'wpinv_template', 999, 1);
 }
 
 /**
@@ -1540,10 +1540,10 @@ 
  * 
  * @param GetPaid_Payment_Form $form
  */
-function getpaid_display_payment_form( $form ) {
+function getpaid_display_payment_form($form) {
 
-    if ( is_numeric( $form ) ) {
-        $form = new GetPaid_Payment_Form( $form );
+    if (is_numeric($form)) {
+        $form = new GetPaid_Payment_Form($form);
     }
 
     $form->display();
@@ -1553,16 +1553,16 @@ 
 /**
  * Helper function to display a item payment form on the frontend.
  */
-function getpaid_display_item_payment_form( $items ) {
+function getpaid_display_item_payment_form($items) {
 
-    $form = new GetPaid_Payment_Form( wpinv_get_default_payment_form() );
-    $form->set_items( $items );
+    $form = new GetPaid_Payment_Form(wpinv_get_default_payment_form());
+    $form->set_items($items);
 
-    if ( 0 == count( $form->get_items() ) ) {
+    if (0 == count($form->get_items())) {
         echo aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'No published items found', 'invoicing' ),
+				'content' => __('No published items found', 'invoicing'),
 			)
         );
         return;
@@ -1574,75 +1574,75 @@ 
 /**
  * Helper function to display an invoice payment form on the frontend.
  */
-function getpaid_display_invoice_payment_form( $invoice_id ) {
+function getpaid_display_invoice_payment_form($invoice_id) {
     global $invoicing;
 
-    $invoice = wpinv_get_invoice( $invoice_id );
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'Invoice not found', 'invoicing' ),
+				'content' => __('Invoice not found', 'invoicing'),
 			)
 		);
     }
 
-    if ( $invoice->is_paid() ) {
+    if ($invoice->is_paid()) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'Invoice has already been paid', 'invoicing' ),
+				'content' => __('Invoice has already been paid', 'invoicing'),
 			)
 		);
     }
 
     // Get the form elements and items.
-    $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+    $form = wpinv_get_default_payment_form();
+	$elements = $invoicing->form_elements->get_form_elements($form);
+	$items    = $invoicing->form_elements->convert_checkout_items($invoice->cart_details, $invoice);
 
 	ob_start();
 	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+	do_action('wpinv_payment_form_top');
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='invoice_id' value='$invoice_id'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+	wp_nonce_field('wpinv_payment_form', 'wpinv_payment_form');
+	wp_nonce_field('vat_validation', '_wpi_nonce');
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+	foreach ($elements as $element) {
+		do_action('wpinv_frontend_render_payment_form_element', $element, $items, $form);
+		do_action("wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form);
 	}
 
 	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
+	do_action('wpinv_payment_form_bottom');
 	echo '</form>';
 
 	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+	return str_replace('sr-only', '', $content);
 }
 
 /**
  * Helper function to convert item string to array.
  */
-function getpaid_convert_items_to_array( $items ) {
-    $items    = array_filter( array_map( 'trim', explode( ',', $items ) ) );
+function getpaid_convert_items_to_array($items) {
+    $items    = array_filter(array_map('trim', explode(',', $items)));
     $prepared = array();
 
-    foreach ( $items as $item ) {
-        $data = array_map( 'trim', explode( '|', $item ) );
+    foreach ($items as $item) {
+        $data = array_map('trim', explode('|', $item));
 
-        if ( empty( $data[0] ) || ! is_numeric( $data[0] ) ) {
+        if (empty($data[0]) || !is_numeric($data[0])) {
             continue;
         }
 
         $quantity = 1;
-        if ( isset( $data[1] ) && is_numeric( $data[1] ) ) {
+        if (isset($data[1]) && is_numeric($data[1])) {
             $quantity = (int) $data[1];
         }
 
-        $prepared[ $data[0] ] = $quantity;
+        $prepared[$data[0]] = $quantity;
 
     }
 
@@ -1652,13 +1652,13 @@ 
 /**
  * Helper function to convert item array to string.
  */
-function getpaid_convert_items_to_string( $items ) {
+function getpaid_convert_items_to_string($items) {
     $prepared = array();
 
-    foreach ( $items as $item => $quantity ) {
+    foreach ($items as $item => $quantity) {
         $prepared[] = "$item|$quantity";
     }
-    return implode( ',', $prepared );
+    return implode(',', $prepared);
 }
 
 /**
@@ -1666,22 +1666,22 @@ 
  * 
  * Provide a label and one of $form, $items or $invoice.
  */
-function getpaid_get_payment_button( $label, $form = null, $items = null, $invoice = null ) {
-    $label = sanitize_text_field( $label );
+function getpaid_get_payment_button($label, $form = null, $items = null, $invoice = null) {
+    $label = sanitize_text_field($label);
     $nonce = wp_create_nonce('getpaid_ajax_form');
 
-    if ( ! empty( $form ) ) {
-        $form  = esc_attr( $form );
+    if (!empty($form)) {
+        $form = esc_attr($form);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-form='$form'>$label</button>"; 
     }
 	
-	if ( ! empty( $items ) ) {
-        $items  = esc_attr( $items );
+	if (!empty($items)) {
+        $items = esc_attr($items);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-item='$items'>$label</button>"; 
     }
     
-    if ( ! empty( $invoice ) ) {
-        $invoice  = esc_attr( $invoice );
+    if (!empty($invoice)) {
+        $invoice = esc_attr($invoice);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-invoice='$invoice'>$label</button>"; 
     }
 
@@ -1692,17 +1692,17 @@ 
  *
  * @param WPInv_Invoice $invoice
  */
-function getpaid_the_invoice_description( $invoice ) {
+function getpaid_the_invoice_description($invoice) {
     $description = $invoice->get_description();
 
-    if ( empty( $description ) ) {
+    if (empty($description)) {
         return;
     }
 
-    $description = wp_kses_post( $description );
+    $description = wp_kses_post($description);
     echo "<small class='getpaid-invoice-description text-dark p-2 form-text'><em>$description</em></small>";
 }
-add_action( 'getpaid_invoice_line_items', 'getpaid_the_invoice_description', 100 );
+add_action('getpaid_invoice_line_items', 'getpaid_the_invoice_description', 100);
 
 /**
  * Render element on a form.
@@ -1710,41 +1710,41 @@ 
  * @param array $element
  * @param GetPaid_Payment_Form $form
  */
-function getpaid_payment_form_element( $element, $form ) {
+function getpaid_payment_form_element($element, $form) {
 
     // Set up the args.
-    $element_type    = trim( $element['type'] );
+    $element_type    = trim($element['type']);
     $element['form'] = $form;
-    extract( $element );
+    extract($element);
 
     // Try to locate the appropriate template.
-    $located = wpinv_locate_template( "payment-forms/elements/$element_type.php" );
+    $located = wpinv_locate_template("payment-forms/elements/$element_type.php");
     
     // Abort if this is not our element.
-    if ( empty( $located ) || ! file_exists( $located ) ) {
+    if (empty($located) || !file_exists($located)) {
         return;
     }
 
     // Generate the class and id of the element.
-    $wrapper_class = 'getpaid-payment-form-element-' . trim( esc_attr( $element_type ) );
-    $id            = isset( $id ) ? $id : uniqid( 'gp' );
+    $wrapper_class = 'getpaid-payment-form-element-' . trim(esc_attr($element_type));
+    $id            = isset($id) ? $id : uniqid('gp');
 
     // Echo the opening wrapper.
     echo "<div class='getpaid-payment-form-element $wrapper_class'>";
 
     // Fires before displaying a given element type's content.
-    do_action( "getpaid_before_payment_form_{$element_type}_element", $element, $form );
+    do_action("getpaid_before_payment_form_{$element_type}_element", $element, $form);
 
     // Include the template for the element.
     include $located;
 
     // Fires after displaying a given element type's content.
-    do_action( "getpaid_payment_form_{$element_type}_element", $element, $form );
+    do_action("getpaid_payment_form_{$element_type}_element", $element, $form);
 
     // Echo the closing wrapper.
     echo '</div>';
 }
-add_action( 'getpaid_payment_form_element', 'getpaid_payment_form_element', 10, 2 );
+add_action('getpaid_payment_form_element', 'getpaid_payment_form_element', 10, 2);
 
 /**
  * Shows a list of gateways that support recurring payments.
@@ -1752,17 +1752,17 @@ 
 function wpinv_get_recurring_gateways_text() {
     $gateways = array();
 
-    foreach ( wpinv_get_payment_gateways() as $key => $gateway ) {
-        if ( wpinv_gateway_support_subscription( $key ) ) {
-            $gateways[] = sanitize_text_field( $gateway['admin_label'] );
+    foreach (wpinv_get_payment_gateways() as $key => $gateway) {
+        if (wpinv_gateway_support_subscription($key)) {
+            $gateways[] = sanitize_text_field($gateway['admin_label']);
         }
     }
 
-    if ( empty( $gateways ) ) {
-        return "<span class='form-text text-danger'>" . __( 'No active gateways support subscription payments.', 'invoicing' ) ."</span>";
+    if (empty($gateways)) {
+        return "<span class='form-text text-danger'>" . __('No active gateways support subscription payments.', 'invoicing') . "</span>";
     }
 
-    return "<span class='form-text text-muted'>" . wp_sprintf( __( 'Subscription payments only supported by: %s', 'invoicing' ), implode( ', ', $gateways ) ) ."</span>";
+    return "<span class='form-text text-muted'>" . wp_sprintf(__('Subscription payments only supported by: %s', 'invoicing'), implode(', ', $gateways)) . "</span>";
 
 }
 
@@ -1772,5 +1772,5 @@ 
  * @return GetPaid_Template
  */
 function getpaid_template() {
-    return getpaid()->get( 'template' );
+    return getpaid()->get('template');
 }