AyeCode / invoicing

includes/admin/admin-pages.php

Spacing +71 added lines, -71 removed lines

@@ -1,16 +1,16 @@ 
 <?php
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
-    exit( 'Do NOT access this file directly: ' . basename( __FILE__ ) );
+if (!defined('WPINC')) {
+    exit('Do NOT access this file directly: ' . basename(__FILE__));
 }
 
-add_action( 'manage_wpi_discount_posts_custom_column', 'wpinv_discount_custom_column' );
-function wpinv_discount_custom_column( $column ) {
+add_action('manage_wpi_discount_posts_custom_column', 'wpinv_discount_custom_column');
+function wpinv_discount_custom_column($column) {
     global $post;
 
-    $discount = new WPInv_Discount( $post );
+    $discount = new WPInv_Discount($post);
 
-    switch ( $column ) {
+    switch ($column) {
         case 'code' :
             echo $discount->get_code();
         break;
@@ -21,33 +21,33 @@ 
             echo $discount->get_usage();
         break;
         case 'start_date' :
-            echo getpaid_format_date_value( $discount->get_start_date() );
+            echo getpaid_format_date_value($discount->get_start_date());
         break;
         case 'expiry_date' :
-            echo getpaid_format_date_value( $discount->get_expiration_date(), __( 'Never', 'invoicing' ) );
+            echo getpaid_format_date_value($discount->get_expiration_date(), __('Never', 'invoicing'));
         break;
     }
 }
 
-add_filter( 'post_row_actions', 'wpinv_post_row_actions', 90, 2 );
-function wpinv_post_row_actions( $actions, $post ) {
-    $post_type = !empty( $post->post_type ) ? $post->post_type : '';
+add_filter('post_row_actions', 'wpinv_post_row_actions', 90, 2);
+function wpinv_post_row_actions($actions, $post) {
+    $post_type = !empty($post->post_type) ? $post->post_type : '';
 
-    if ( $post_type == 'wpi_discount' ) {
-        $actions = wpinv_discount_row_actions( $post, $actions );
+    if ($post_type == 'wpi_discount') {
+        $actions = wpinv_discount_row_actions($post, $actions);
     }
 
     return $actions;
 }
 
-function wpinv_discount_row_actions( $discount, $row_actions ) {
-    $row_actions  = array();
-    $edit_link = get_edit_post_link( $discount->ID );
-    $row_actions['edit'] = '<a href="' . esc_url( $edit_link ) . '">' . __( 'Edit', 'invoicing' ) . '</a>';
+function wpinv_discount_row_actions($discount, $row_actions) {
+    $row_actions = array();
+    $edit_link = get_edit_post_link($discount->ID);
+    $row_actions['edit'] = '<a href="' . esc_url($edit_link) . '">' . __('Edit', 'invoicing') . '</a>';
 
-    if ( in_array( strtolower( $discount->post_status ),  array(  'publish' ) ) ) {
+    if (in_array(strtolower($discount->post_status), array('publish'))) {
 
-        $url    = esc_url(
+        $url = esc_url(
                     wp_nonce_url(
                         add_query_arg(
                             array(
@@ -59,13 +59,13 @@ 
                         'getpaid-nonce'
                     )
                 );
-		$anchor = __( 'Deactivate', 'invoicing' );
-		$title  = esc_attr__( 'Are you sure you want to deactivate this discount?', 'invoicing' );
+		$anchor = __('Deactivate', 'invoicing');
+		$title  = esc_attr__('Are you sure you want to deactivate this discount?', 'invoicing');
         $row_actions['deactivate'] = "<a href='$url' onclick='return confirm(\"$title\")'>$anchor</a>";
 
-    } else if( in_array( strtolower( $discount->post_status ),  array( 'pending', 'draft' ) ) ) {
+    } else if (in_array(strtolower($discount->post_status), array('pending', 'draft'))) {
 
-        $url    = esc_url(
+        $url = esc_url(
             wp_nonce_url(
                 add_query_arg(
                     array(
@@ -77,13 +77,13 @@ 
                 'getpaid-nonce'
             )
         );
-		$anchor = __( 'Activate', 'invoicing' );
-		$title  = esc_attr__( 'Are you sure you want to activate this discount?', 'invoicing' );
+		$anchor = __('Activate', 'invoicing');
+		$title  = esc_attr__('Are you sure you want to activate this discount?', 'invoicing');
         $row_actions['activate'] = "<a href='$url' onclick='return confirm(\"$title\")'>$anchor</a>";
 
     }
 
-    $url    = esc_url(
+    $url = esc_url(
         wp_nonce_url(
             add_query_arg(
                 array(
@@ -95,11 +95,11 @@ 
             'getpaid-nonce'
         )
     );
-	$anchor = __( 'Delete', 'invoicing' );
-	$title  = esc_attr__( 'Are you sure you want to delete this discount?', 'invoicing' );
+	$anchor = __('Delete', 'invoicing');
+	$title  = esc_attr__('Are you sure you want to delete this discount?', 'invoicing');
     $row_actions['delete'] = "<a href='$url' onclick='return confirm(\"$title\")'>$anchor</a>";
 
-    $row_actions = apply_filters( 'wpinv_discount_row_actions', $row_actions, $discount );
+    $row_actions = apply_filters('wpinv_discount_row_actions', $row_actions, $discount);
 
     return $row_actions;
 }
@@ -107,68 +107,68 @@ 
 function wpinv_restrict_manage_posts() {
     global $typenow;
 
-    if( 'wpi_discount' == $typenow ) {
+    if ('wpi_discount' == $typenow) {
         wpinv_discount_filters();
     }
 }
-add_action( 'restrict_manage_posts', 'wpinv_restrict_manage_posts', 10 );
+add_action('restrict_manage_posts', 'wpinv_restrict_manage_posts', 10);
 
 function wpinv_discount_filters() {
 
     ?>
     <select name="discount_type" id="dropdown_wpinv_discount_type">
-        <option value=""><?php _e( 'Show all types', 'invoicing' ); ?></option>
+        <option value=""><?php _e('Show all types', 'invoicing'); ?></option>
         <?php
             $types = wpinv_get_discount_types();
 
-            foreach ( $types as $name => $type ) {
-                echo '<option value="' . esc_attr( $name ) . '"';
+            foreach ($types as $name => $type) {
+                echo '<option value="' . esc_attr($name) . '"';
 
-                if ( isset( $_GET['discount_type'] ) )
-                    selected( $name, $_GET['discount_type'] );
+                if (isset($_GET['discount_type']))
+                    selected($name, $_GET['discount_type']);
 
-                echo '>' . esc_html__( $type, 'invoicing' ) . '</option>';
+                echo '>' . esc_html__($type, 'invoicing') . '</option>';
             }
         ?>
     </select>
     <?php
 }
 
-function wpinv_request( $vars ) {
+function wpinv_request($vars) {
     global $typenow, $wp_post_statuses;
 
-    if ( getpaid_is_invoice_post_type( $typenow ) ) {
-        if ( ! isset( $vars['post_status'] ) ) {
-            $post_statuses = wpinv_get_invoice_statuses( false, false, $typenow );
+    if (getpaid_is_invoice_post_type($typenow)) {
+        if (!isset($vars['post_status'])) {
+            $post_statuses = wpinv_get_invoice_statuses(false, false, $typenow);
 
-            foreach ( $post_statuses as $status => $value ) {
-                if ( isset( $wp_post_statuses[ $status ] ) && false === $wp_post_statuses[ $status ]->show_in_admin_all_list ) {
-                    unset( $post_statuses[ $status ] );
+            foreach ($post_statuses as $status => $value) {
+                if (isset($wp_post_statuses[$status]) && false === $wp_post_statuses[$status]->show_in_admin_all_list) {
+                    unset($post_statuses[$status]);
                 }
             }
 
-            $vars['post_status'] = array_keys( $post_statuses );
+            $vars['post_status'] = array_keys($post_statuses);
         }
 
-    } else if ( 'wpi_discount' == $typenow ) {
-        $meta_query = !empty( $vars['meta_query'] ) ? $vars['meta_query'] : array();
+    } else if ('wpi_discount' == $typenow) {
+        $meta_query = !empty($vars['meta_query']) ? $vars['meta_query'] : array();
         // Filter vat rule type
-        if ( isset( $_GET['discount_type'] ) && $_GET['discount_type'] !== '' ) {
+        if (isset($_GET['discount_type']) && $_GET['discount_type'] !== '') {
             $meta_query[] = array(
                     'key'   => '_wpi_discount_type',
-                    'value' => sanitize_text_field( $_GET['discount_type'] ),
+                    'value' => sanitize_text_field($_GET['discount_type']),
                     'compare' => '='
                 );
         }
 
-        if ( !empty( $meta_query ) ) {
+        if (!empty($meta_query)) {
             $vars['meta_query'] = $meta_query;
         }
     }
 
     return $vars;
 }
-add_filter( 'request', 'wpinv_request' );
+add_filter('request', 'wpinv_request');
 
 /**
  * Create a page and store the ID in an option.
@@ -180,19 +180,19 @@ 
  * @param int $post_parent (default: 0) Parent for the new page
  * @return int page ID
  */
-function wpinv_create_page( $slug, $option = '', $page_title = '', $page_content = '', $post_parent = 0 ) {
+function wpinv_create_page($slug, $option = '', $page_title = '', $page_content = '', $post_parent = 0) {
     global $wpdb;
 
-    $option_value = wpinv_get_option( $option );
+    $option_value = wpinv_get_option($option);
 
-    if ( ! empty( $option_value ) && ( $page_object = get_post( $option_value ) ) ) {
-        if ( 'page' === $page_object->post_type && ! in_array( $page_object->post_status, array( 'pending', 'trash', 'future', 'auto-draft' ) ) ) {
+    if (!empty($option_value) && ($page_object = get_post($option_value))) {
+        if ('page' === $page_object->post_type && !in_array($page_object->post_status, array('pending', 'trash', 'future', 'auto-draft'))) {
             // Valid page is already in place
             return $page_object->ID;
         }
     }
 
-    if(!empty($post_parent)){
+    if (!empty($post_parent)) {
         $page = get_page_by_path($post_parent);
         if ($page) {
             $post_parent = $page->ID;
@@ -201,40 +201,40 @@ 
         }
     }
 
-    if ( strlen( $page_content ) > 0 ) {
+    if (strlen($page_content) > 0) {
         // Search for an existing page with the specified page content (typically a shortcode)
-        $valid_page_found = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' ) AND post_content LIKE %s LIMIT 1;", "%{$page_content}%" ) );
+        $valid_page_found = $wpdb->get_var($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' ) AND post_content LIKE %s LIMIT 1;", "%{$page_content}%"));
     } else {
         // Search for an existing page with the specified page slug
-        $valid_page_found = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' )  AND post_name = %s LIMIT 1;", $slug ) );
+        $valid_page_found = $wpdb->get_var($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status NOT IN ( 'pending', 'trash', 'future', 'auto-draft' )  AND post_name = %s LIMIT 1;", $slug));
     }
 
-    $valid_page_found = apply_filters( 'wpinv_create_page_id', $valid_page_found, $slug, $page_content );
+    $valid_page_found = apply_filters('wpinv_create_page_id', $valid_page_found, $slug, $page_content);
 
-    if ( $valid_page_found ) {
-        if ( $option ) {
-            wpinv_update_option( $option, $valid_page_found );
+    if ($valid_page_found) {
+        if ($option) {
+            wpinv_update_option($option, $valid_page_found);
         }
         return $valid_page_found;
     }
 
     // Search for a matching valid trashed page
-    if ( strlen( $page_content ) > 0 ) {
+    if (strlen($page_content) > 0) {
         // Search for an existing page with the specified page content (typically a shortcode)
-        $trashed_page_found = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status = 'trash' AND post_content LIKE %s LIMIT 1;", "%{$page_content}%" ) );
+        $trashed_page_found = $wpdb->get_var($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status = 'trash' AND post_content LIKE %s LIMIT 1;", "%{$page_content}%"));
     } else {
         // Search for an existing page with the specified page slug
-        $trashed_page_found = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status = 'trash' AND post_name = %s LIMIT 1;", $slug ) );
+        $trashed_page_found = $wpdb->get_var($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_type='page' AND post_status = 'trash' AND post_name = %s LIMIT 1;", $slug));
     }
 
-    if ( $trashed_page_found ) {
+    if ($trashed_page_found) {
         $page_id   = $trashed_page_found;
         $page_data = array(
             'ID'             => $page_id,
             'post_status'    => 'publish',
             'post_parent'    => $post_parent,
         );
-        wp_update_post( $page_data );
+        wp_update_post($page_data);
     } else {
         $page_data = array(
             'post_status'    => 'publish',
@@ -246,11 +246,11 @@ 
             'post_parent'    => $post_parent,
             'comment_status' => 'closed',
         );
-        $page_id = wp_insert_post( $page_data );
+        $page_id = wp_insert_post($page_data);
     }
 
-    if ( $option ) {
-        wpinv_update_option( $option, (int)$page_id );
+    if ($option) {
+        wpinv_update_option($option, (int) $page_id);
     }
 
     return $page_id;

includes/admin/meta-boxes/class-getpaid-meta-box-item-info.php

Spacing +26 added lines, -26 removed lines

@@ -7,7 +7,7 @@ 
  *
  */
 
-if ( ! defined( 'ABSPATH' ) ) {
+if (!defined('ABSPATH')) {
 	exit; // Exit if accessed directly
 }
 
@@ -21,20 +21,20 @@ 
 	 *
 	 * @param WP_Post $post
 	 */
-    public static function output( $post ) {
+    public static function output($post) {
 
         // Prepare the item.
-        $item = new WPInv_Item( $post );
+        $item = new WPInv_Item($post);
 
         ?>
 
         <div class='bsui' style='padding-top: 10px;'>
-            <?php do_action( 'wpinv_item_before_info_metabox', $item ); ?>
+            <?php do_action('wpinv_item_before_info_metabox', $item); ?>
 
             <div class="wpinv_item_type form-group row">
                 <label for="wpinv_item_type" class="col-sm-12 col-form-label">
-                    <?php _e( 'Item Type', 'invoicing' );?>
-                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php echo strip_tags( self::get_tooltip( $post ) ); ?>"></span>
+                    <?php _e('Item Type', 'invoicing'); ?>
+                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php echo strip_tags(self::get_tooltip($post)); ?>"></span>
                 </label>
 
                 <div class="col-sm-12">
@@ -44,8 +44,8 @@ 
                             array(
                                 'id'               => 'wpinv_item_type',
                                 'name'             => 'wpinv_item_type',
-                                'placeholder'      => __( 'Select item type', 'invoicing' ),
-                                'value'            => $item->get_type( 'edit' ),
+                                'placeholder'      => __('Select item type', 'invoicing'),
+                                'value'            => $item->get_type('edit'),
                                 'select2'          => true,
                                 'data-allow-clear' => 'false',
                                 'no_wrap'          => true,
@@ -59,42 +59,42 @@ 
 
             <div class="wpinv_item_shortcode form-group row">
                 <label for="wpinv_item_shortcode" class="col-sm-12 col-form-label">
-                    <?php _e( 'Payment Form Shortcode', 'invoicing' );?>
-                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e( 'Displays a payment form', 'invoicing' ); ?>"></span>
+                    <?php _e('Payment Form Shortcode', 'invoicing'); ?>
+                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e('Displays a payment form', 'invoicing'); ?>"></span>
                 </label>
 
                 <div class="col-sm-12">
-                    <input  onClick="this.select()" type="text" id="wpinv_item_shortcode" value="[getpaid item=<?php echo esc_attr( $item->get_id() ); ?>]" style="width: 100%;" readonly/>
+                    <input  onClick="this.select()" type="text" id="wpinv_item_shortcode" value="[getpaid item=<?php echo esc_attr($item->get_id()); ?>]" style="width: 100%;" readonly/>
                 </div>
             </div>
 
             <div class="wpinv_item_buy_shortcode form-group row">
                 <label for="wpinv_item_button_shortcode" class="col-sm-12 col-form-label">
-                    <?php _e( 'Payment Button Shortcode', 'invoicing' );?>
-                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e( 'Displays a buy now button', 'invoicing' ); ?>"></span>
+                    <?php _e('Payment Button Shortcode', 'invoicing'); ?>
+                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e('Displays a buy now button', 'invoicing'); ?>"></span>
                 </label>
 
                 <div class="col-sm-12">
-                    <input onClick="this.select()" type="text" id="wpinv_item_button_shortcode" value="[getpaid item=<?php echo esc_attr( $item->get_id() ); ?> button='Buy Now']" style="width: 100%;" readonly/>
+                    <input onClick="this.select()" type="text" id="wpinv_item_button_shortcode" value="[getpaid item=<?php echo esc_attr($item->get_id()); ?> button='Buy Now']" style="width: 100%;" readonly/>
                     <small class="form-text text-muted">
-                        <?php _e( 'Or use the following URL in a link:', 'invoicing' );?>
-                        <code>#getpaid-item-<?php echo intval( $item->get_id() ); ?>|0</code>
+                        <?php _e('Or use the following URL in a link:', 'invoicing'); ?>
+                        <code>#getpaid-item-<?php echo intval($item->get_id()); ?>|0</code>
                     </small>
                 </div>
             </div>
 
             <div class="wpinv_item_custom_id form-group">
-                <?php _e( 'Custom ID', 'invoicing' );?> &mdash; <?php echo sanitize_text_field( $item->get_custom_id() ) ?>
+                <?php _e('Custom ID', 'invoicing'); ?> &mdash; <?php echo sanitize_text_field($item->get_custom_id()) ?>
             </div>
 
-            <?php do_action( 'wpinv_meta_values_metabox_before', $post ); ?>
-            <?php foreach ( apply_filters( 'wpinv_show_meta_values_for_keys', array() ) as $meta_key ) : ?>
+            <?php do_action('wpinv_meta_values_metabox_before', $post); ?>
+            <?php foreach (apply_filters('wpinv_show_meta_values_for_keys', array()) as $meta_key) : ?>
                 <div class="wpinv_item_custom_id form-group">
-                    <?php sanitize_text_field( $meta_key );?> &mdash; <?php echo sanitize_text_field( get_post_meta( $item->get_id(), '_wpinv_' . $meta_key, true ) ); ?>
+                    <?php sanitize_text_field($meta_key); ?> &mdash; <?php echo sanitize_text_field(get_post_meta($item->get_id(), '_wpinv_' . $meta_key, true)); ?>
                 </div>
             <?php endforeach; ?>
-            <?php do_action( 'wpinv_meta_values_metabox_after', $post ); ?>
-            <?php do_action( 'wpinv_item_info_metabox', $item ); ?>
+            <?php do_action('wpinv_meta_values_metabox_after', $post); ?>
+            <?php do_action('wpinv_item_info_metabox', $item); ?>
         </div>
         <?php
 
@@ -104,16 +104,16 @@ 
 	 * Returns item type tolltip.
 	 *
 	 */
-    public static function get_tooltip( $post ) {
+    public static function get_tooltip($post) {
 
         ob_start();
         ?>
 
-        <?php _e( 'Standard: Standard item type', 'invoicing' );?>
-        <?php _e( 'Fee: Like Registration Fee, Sign up Fee etc', 'invoicing' );?>
+        <?php _e('Standard: Standard item type', 'invoicing'); ?>
+        <?php _e('Fee: Like Registration Fee, Sign up Fee etc', 'invoicing'); ?>
 
         <?php
-        do_action( 'wpinv_item_info_metabox_after', $post );
+        do_action('wpinv_item_info_metabox_after', $post);
 
         return ob_get_clean();
 

includes/admin/meta-boxes/class-getpaid-meta-box-payment-form-info.php

Spacing +13 added lines, -13 removed lines

@@ -7,7 +7,7 @@ 
  *
  */
 
-if ( ! defined( 'ABSPATH' ) ) {
+if (!defined('ABSPATH')) {
 	exit; // Exit if accessed directly
 }
 
@@ -21,43 +21,43 @@ 
 	 *
 	 * @param WP_Post $post
 	 */
-    public static function output( $post ) {
+    public static function output($post) {
 
         // Prepare the form.
-        $form = new GetPaid_Payment_Form( $post );
+        $form = new GetPaid_Payment_Form($post);
 
         ?>
 
         <div class='bsui' style='padding-top: 10px;'>
-            <?php do_action( 'wpinv_payment_form_before_info_metabox', $form ); ?>
+            <?php do_action('wpinv_payment_form_before_info_metabox', $form); ?>
 
             <div class="wpinv_payment_form_shortcode form-group row">
                 <label for="wpinv_payment_form_shortcode" class="col-sm-12 col-form-label">
-                    <?php _e( 'Payment Form Shortcode', 'invoicing' );?>
-                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e( 'Displays a payment form', 'invoicing' ); ?>"></span>
+                    <?php _e('Payment Form Shortcode', 'invoicing'); ?>
+                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e('Displays a payment form', 'invoicing'); ?>"></span>
                 </label>
 
                 <div class="col-sm-12">
-                    <input  onClick="this.select()" type="text" id="wpinv_payment_form_shortcode" value="[getpaid form=<?php echo esc_attr( $form->get_id() ); ?>]" style="width: 100%;" />
+                    <input  onClick="this.select()" type="text" id="wpinv_payment_form_shortcode" value="[getpaid form=<?php echo esc_attr($form->get_id()); ?>]" style="width: 100%;" />
                 </div>
             </div>
 
             <div class="wpinv_payment_form_buy_shortcode form-group row">
                 <label for="wpinv_payment_form_buy_shortcode" class="col-sm-12 col-form-label">
-                    <?php _e( 'Payment Button Shortcode', 'invoicing' );?>
-                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e( 'Displays a buy now button', 'invoicing' ); ?>"></span>
+                    <?php _e('Payment Button Shortcode', 'invoicing'); ?>
+                    <span class="wpi-help-tip dashicons dashicons-editor-help" title="<?php esc_attr_e('Displays a buy now button', 'invoicing'); ?>"></span>
                 </label>
 
                 <div class="col-sm-12">
-                    <input onClick="this.select()" type="text" id="wpinv_payment_form_buy_shortcode" value="[getpaid form=<?php echo esc_attr( $form->get_id() ); ?> button='Buy Now']" style="width: 100%;" />
+                    <input onClick="this.select()" type="text" id="wpinv_payment_form_buy_shortcode" value="[getpaid form=<?php echo esc_attr($form->get_id()); ?> button='Buy Now']" style="width: 100%;" />
                     <small class="form-text text-muted">
-                        <?php _e( 'Or use the following URL in a link:', 'invoicing' );?>
-                        <code>#getpaid-form-<?php echo intval( $form->get_id() ); ?></code>
+                        <?php _e('Or use the following URL in a link:', 'invoicing'); ?>
+                        <code>#getpaid-form-<?php echo intval($form->get_id()); ?></code>
                     </small>
                 </div>
             </div>
 
-            <?php do_action( 'wpinv_payment_form_info_metabox', $form ); ?>
+            <?php do_action('wpinv_payment_form_info_metabox', $form); ?>
         </div>
         <?php
 

includes/geolocation/class-getpaid-geolocation.php

Indentation +259 added lines, -259 removed lines

@@ -13,264 +13,264 @@
  */
 class GetPaid_Geolocation {
 
-	/**
-	 * Holds the current user's IP Address.
-	 *
-	 * @var string
-	 */
-	public static $current_user_ip;
-
-	/**
-	 * API endpoints for looking up a user IP address.
-	 *
-	 * For example, in case a user is on localhost.
-	 *
-	 * @var array
-	 */
-	protected static $ip_lookup_apis = array(
-		'ipify'             => 'http://api.ipify.org/',
-		'ipecho'            => 'http://ipecho.net/plain',
-		'ident'             => 'http://ident.me',
-		'whatismyipaddress' => 'http://bot.whatismyipaddress.com',
-	);
-
-	/**
-	 * API endpoints for geolocating an IP address
-	 *
-	 * @var array
-	 */
-	protected static $geoip_apis = array(
-		'ip-api.com' => 'http://ip-api.com/json/%s',
-		'ipinfo.io'  => 'https://ipinfo.io/%s/json',
-	);
-
-	/**
-	 * Get current user IP Address.
-	 *
-	 * @return string
-	 */
-	public static function get_ip_address() {
-		return wpinv_get_ip();
-	}
-
-	/**
-	 * Get user IP Address using an external service.
-	 * This can be used as a fallback for users on localhost where
-	 * get_ip_address() will be a local IP and non-geolocatable.
-	 *
-	 * @return string
-	 */
-	public static function get_external_ip_address() {
-
-		$transient_name = 'external_ip_address_0.0.0.0';
-
-		if ( '' !== self::get_ip_address() ) {
-			$transient_name      = 'external_ip_address_' . self::get_ip_address();
-		}
-
-		// Try retrieving from cache.
-		$external_ip_address = get_transient( $transient_name );
-
-		if ( false === $external_ip_address ) {
-			$external_ip_address     = '0.0.0.0';
-			$ip_lookup_services      = apply_filters( 'getpaid_geolocation_ip_lookup_apis', self::$ip_lookup_apis );
-			$ip_lookup_services_keys = array_keys( $ip_lookup_services );
-			shuffle( $ip_lookup_services_keys );
-
-			foreach ( $ip_lookup_services_keys as $service_name ) {
-				$service_endpoint = $ip_lookup_services[ $service_name ];
-				$response         = wp_safe_remote_get( $service_endpoint, array( 'timeout' => 2 ) );
-
-				if ( ! is_wp_error( $response ) && rest_is_ip_address( $response['body'] ) ) {
-					$external_ip_address = apply_filters( 'getpaid_geolocation_ip_lookup_api_response', wpinv_clean( $response['body'] ), $service_name );
-					break;
-				}
-
-			}
-
-			set_transient( $transient_name, $external_ip_address, WEEK_IN_SECONDS );
-		}
-
-		return $external_ip_address;
-	}
-
-	/**
-	 * Geolocate an IP address.
-	 *
-	 * @param  string $ip_address   IP Address.
-	 * @param  bool   $fallback     If true, fallbacks to alternative IP detection (can be slower).
-	 * @param  bool   $api_fallback If true, uses geolocation APIs if the database file doesn't exist (can be slower).
-	 * @return array
-	 */
-	public static function geolocate_ip( $ip_address = '', $fallback = false, $api_fallback = true ) {
-
-		if ( empty( $ip_address ) ) {
-			$ip_address = self::get_ip_address();
-		}
-
-		// Update the current user's IP Address.
-		self::$current_user_ip = $ip_address;
-
-		// Filter to allow custom geolocation of the IP address.
-		$country_code = apply_filters( 'getpaid_geolocate_ip', false, $ip_address, $fallback, $api_fallback );
-
-		if ( false !== $country_code ) {
-
-			return array(
-				'country'  => $country_code,
-				'state'    => '',
-				'city'     => '',
-				'postcode' => '',
-			);
-
-		}
-
-		$country_code = self::get_country_code_from_headers();
-
-		/**
-		 * Get geolocation filter.
-		 *
-		 * @since 1.0.19
-		 * @param array  $geolocation Geolocation data, including country, state, city, and postcode.
-		 * @param string $ip_address  IP Address.
-		 */
-		$geolocation  = apply_filters(
-			'getpaid_get_geolocation',
-			array(
-				'country'  => $country_code,
-				'state'    => '',
-				'city'     => '',
-				'postcode' => '',
-			),
-			$ip_address
-		);
-
-		// If we still haven't found a country code, let's consider doing an API lookup.
-		if ( '' === $geolocation['country'] && $api_fallback ) {
-			$geolocation['country'] = self::geolocate_via_api( $ip_address );
-		}
-
-		// It's possible that we're in a local environment, in which case the geolocation needs to be done from the
-		// external address.
-		if ( '' === $geolocation['country'] && $fallback ) {
-			$external_ip_address = self::get_external_ip_address();
-
-			// Only bother with this if the external IP differs.
-			if ( '0.0.0.0' !== $external_ip_address && $external_ip_address !== $ip_address ) {
-				return self::geolocate_ip( $external_ip_address, false, $api_fallback );
-			}
-
-		}
-
-		return array(
-			'country'  => $geolocation['country'],
-			'state'    => $geolocation['state'],
-			'city'     => $geolocation['city'],
-			'postcode' => $geolocation['postcode'],
-		);
-
-	}
-
-	/**
-	 * Fetches the country code from the request headers, if one is available.
-	 *
-	 * @since 1.0.19
-	 * @return string The country code pulled from the headers, or empty string if one was not found.
-	 */
-	protected static function get_country_code_from_headers() {
-		$country_code = '';
-
-		$headers = array(
-			'MM_COUNTRY_CODE',
-			'GEOIP_COUNTRY_CODE',
-			'HTTP_CF_IPCOUNTRY',
-			'HTTP_X_COUNTRY_CODE',
-		);
-
-		foreach ( $headers as $header ) {
-			if ( empty( $_SERVER[ $header ] ) ) {
-				continue;
-			}
-
-			$country_code = strtoupper( sanitize_text_field( wp_unslash( $_SERVER[ $header ] ) ) );
-			break;
-		}
-
-		return $country_code;
-	}
-
-	/**
-	 * Use APIs to Geolocate the user.
-	 *
-	 * Geolocation APIs can be added through the use of the getpaid_geolocation_geoip_apis filter.
-	 * Provide a name=>value pair for service-slug=>endpoint.
-	 *
-	 * If APIs are defined, one will be chosen at random to fulfil the request. After completing, the result
-	 * will be cached in a transient.
-	 *
-	 * @param  string $ip_address IP address.
-	 * @return string
-	 */
-	protected static function geolocate_via_api( $ip_address ) {
-
-		// Retrieve from cache...
-		$country_code = get_transient( 'geoip_' . $ip_address );
-
-		// If missing, retrieve from the API.
-		if ( false === $country_code ) {
-			$geoip_services = apply_filters( 'getpaid_geolocation_geoip_apis', self::$geoip_apis );
-
-			if ( empty( $geoip_services ) ) {
-				return '';
-			}
-
-			$geoip_services_keys = array_keys( $geoip_services );
-
-			shuffle( $geoip_services_keys );
-
-			foreach ( $geoip_services_keys as $service_name ) {
-
-				$service_endpoint = $geoip_services[ $service_name ];
-				$response         = wp_safe_remote_get( sprintf( $service_endpoint, $ip_address ), array( 'timeout' => 2 ) );
-				$country_code     = sanitize_text_field( strtoupper( self::handle_geolocation_response( $response, $service_name ) ) );
-
-				if ( ! empty( $country_code ) ) {
-					break;
-				}
-
-			}
-
-			set_transient( 'geoip_' . $ip_address, $country_code, WEEK_IN_SECONDS );
-		}
-
-		return $country_code;
-	}
-
-	/**
-	 * Handles geolocation response
-	 *
-	 * @param  WP_Error|String $geolocation_response
-	 * @param  String $geolocation_service
-	 * @return string Country code
-	 */
-	protected static function handle_geolocation_response( $geolocation_response, $geolocation_service ) {
-
-		if ( is_wp_error( $geolocation_response ) || empty( $geolocation_response['body'] ) ) {
-			return '';
-		}
-
-		if ( $geolocation_service === 'ipinfo.io' ) {
-			$data = json_decode( $geolocation_response['body'] );
-			return empty( $data ) ? '' : $data->country;
-		}
-
-		if ( $geolocation_service === 'ip-api.com' ) {
-			$data = json_decode( $geolocation_response['body'] );
-			return empty( $data ) ? '' : $data->countryCode;
-		}
-
-		return apply_filters( 'getpaid_geolocation_geoip_response_' . $geolocation_service, '', $geolocation_response['body'] );
-
-	}
+    /**
+     * Holds the current user's IP Address.
+     *
+     * @var string
+     */
+    public static $current_user_ip;
+
+    /**
+     * API endpoints for looking up a user IP address.
+     *
+     * For example, in case a user is on localhost.
+     *
+     * @var array
+     */
+    protected static $ip_lookup_apis = array(
+        'ipify'             => 'http://api.ipify.org/',
+        'ipecho'            => 'http://ipecho.net/plain',
+        'ident'             => 'http://ident.me',
+        'whatismyipaddress' => 'http://bot.whatismyipaddress.com',
+    );
+
+    /**
+     * API endpoints for geolocating an IP address
+     *
+     * @var array
+     */
+    protected static $geoip_apis = array(
+        'ip-api.com' => 'http://ip-api.com/json/%s',
+        'ipinfo.io'  => 'https://ipinfo.io/%s/json',
+    );
+
+    /**
+     * Get current user IP Address.
+     *
+     * @return string
+     */
+    public static function get_ip_address() {
+        return wpinv_get_ip();
+    }
+
+    /**
+     * Get user IP Address using an external service.
+     * This can be used as a fallback for users on localhost where
+     * get_ip_address() will be a local IP and non-geolocatable.
+     *
+     * @return string
+     */
+    public static function get_external_ip_address() {
+
+        $transient_name = 'external_ip_address_0.0.0.0';
+
+        if ( '' !== self::get_ip_address() ) {
+            $transient_name      = 'external_ip_address_' . self::get_ip_address();
+        }
+
+        // Try retrieving from cache.
+        $external_ip_address = get_transient( $transient_name );
+
+        if ( false === $external_ip_address ) {
+            $external_ip_address     = '0.0.0.0';
+            $ip_lookup_services      = apply_filters( 'getpaid_geolocation_ip_lookup_apis', self::$ip_lookup_apis );
+            $ip_lookup_services_keys = array_keys( $ip_lookup_services );
+            shuffle( $ip_lookup_services_keys );
+
+            foreach ( $ip_lookup_services_keys as $service_name ) {
+                $service_endpoint = $ip_lookup_services[ $service_name ];
+                $response         = wp_safe_remote_get( $service_endpoint, array( 'timeout' => 2 ) );
+
+                if ( ! is_wp_error( $response ) && rest_is_ip_address( $response['body'] ) ) {
+                    $external_ip_address = apply_filters( 'getpaid_geolocation_ip_lookup_api_response', wpinv_clean( $response['body'] ), $service_name );
+                    break;
+                }
+
+            }
+
+            set_transient( $transient_name, $external_ip_address, WEEK_IN_SECONDS );
+        }
+
+        return $external_ip_address;
+    }
+
+    /**
+     * Geolocate an IP address.
+     *
+     * @param  string $ip_address   IP Address.
+     * @param  bool   $fallback     If true, fallbacks to alternative IP detection (can be slower).
+     * @param  bool   $api_fallback If true, uses geolocation APIs if the database file doesn't exist (can be slower).
+     * @return array
+     */
+    public static function geolocate_ip( $ip_address = '', $fallback = false, $api_fallback = true ) {
+
+        if ( empty( $ip_address ) ) {
+            $ip_address = self::get_ip_address();
+        }
+
+        // Update the current user's IP Address.
+        self::$current_user_ip = $ip_address;
+
+        // Filter to allow custom geolocation of the IP address.
+        $country_code = apply_filters( 'getpaid_geolocate_ip', false, $ip_address, $fallback, $api_fallback );
+
+        if ( false !== $country_code ) {
+
+            return array(
+                'country'  => $country_code,
+                'state'    => '',
+                'city'     => '',
+                'postcode' => '',
+            );
+
+        }
+
+        $country_code = self::get_country_code_from_headers();
+
+        /**
+         * Get geolocation filter.
+         *
+         * @since 1.0.19
+         * @param array  $geolocation Geolocation data, including country, state, city, and postcode.
+         * @param string $ip_address  IP Address.
+         */
+        $geolocation  = apply_filters(
+            'getpaid_get_geolocation',
+            array(
+                'country'  => $country_code,
+                'state'    => '',
+                'city'     => '',
+                'postcode' => '',
+            ),
+            $ip_address
+        );
+
+        // If we still haven't found a country code, let's consider doing an API lookup.
+        if ( '' === $geolocation['country'] && $api_fallback ) {
+            $geolocation['country'] = self::geolocate_via_api( $ip_address );
+        }
+
+        // It's possible that we're in a local environment, in which case the geolocation needs to be done from the
+        // external address.
+        if ( '' === $geolocation['country'] && $fallback ) {
+            $external_ip_address = self::get_external_ip_address();
+
+            // Only bother with this if the external IP differs.
+            if ( '0.0.0.0' !== $external_ip_address && $external_ip_address !== $ip_address ) {
+                return self::geolocate_ip( $external_ip_address, false, $api_fallback );
+            }
+
+        }
+
+        return array(
+            'country'  => $geolocation['country'],
+            'state'    => $geolocation['state'],
+            'city'     => $geolocation['city'],
+            'postcode' => $geolocation['postcode'],
+        );
+
+    }
+
+    /**
+     * Fetches the country code from the request headers, if one is available.
+     *
+     * @since 1.0.19
+     * @return string The country code pulled from the headers, or empty string if one was not found.
+     */
+    protected static function get_country_code_from_headers() {
+        $country_code = '';
+
+        $headers = array(
+            'MM_COUNTRY_CODE',
+            'GEOIP_COUNTRY_CODE',
+            'HTTP_CF_IPCOUNTRY',
+            'HTTP_X_COUNTRY_CODE',
+        );
+
+        foreach ( $headers as $header ) {
+            if ( empty( $_SERVER[ $header ] ) ) {
+                continue;
+            }
+
+            $country_code = strtoupper( sanitize_text_field( wp_unslash( $_SERVER[ $header ] ) ) );
+            break;
+        }
+
+        return $country_code;
+    }
+
+    /**
+     * Use APIs to Geolocate the user.
+     *
+     * Geolocation APIs can be added through the use of the getpaid_geolocation_geoip_apis filter.
+     * Provide a name=>value pair for service-slug=>endpoint.
+     *
+     * If APIs are defined, one will be chosen at random to fulfil the request. After completing, the result
+     * will be cached in a transient.
+     *
+     * @param  string $ip_address IP address.
+     * @return string
+     */
+    protected static function geolocate_via_api( $ip_address ) {
+
+        // Retrieve from cache...
+        $country_code = get_transient( 'geoip_' . $ip_address );
+
+        // If missing, retrieve from the API.
+        if ( false === $country_code ) {
+            $geoip_services = apply_filters( 'getpaid_geolocation_geoip_apis', self::$geoip_apis );
+
+            if ( empty( $geoip_services ) ) {
+                return '';
+            }
+
+            $geoip_services_keys = array_keys( $geoip_services );
+
+            shuffle( $geoip_services_keys );
+
+            foreach ( $geoip_services_keys as $service_name ) {
+
+                $service_endpoint = $geoip_services[ $service_name ];
+                $response         = wp_safe_remote_get( sprintf( $service_endpoint, $ip_address ), array( 'timeout' => 2 ) );
+                $country_code     = sanitize_text_field( strtoupper( self::handle_geolocation_response( $response, $service_name ) ) );
+
+                if ( ! empty( $country_code ) ) {
+                    break;
+                }
+
+            }
+
+            set_transient( 'geoip_' . $ip_address, $country_code, WEEK_IN_SECONDS );
+        }
+
+        return $country_code;
+    }
+
+    /**
+     * Handles geolocation response
+     *
+     * @param  WP_Error|String $geolocation_response
+     * @param  String $geolocation_service
+     * @return string Country code
+     */
+    protected static function handle_geolocation_response( $geolocation_response, $geolocation_service ) {
+
+        if ( is_wp_error( $geolocation_response ) || empty( $geolocation_response['body'] ) ) {
+            return '';
+        }
+
+        if ( $geolocation_service === 'ipinfo.io' ) {
+            $data = json_decode( $geolocation_response['body'] );
+            return empty( $data ) ? '' : $data->country;
+        }
+
+        if ( $geolocation_service === 'ip-api.com' ) {
+            $data = json_decode( $geolocation_response['body'] );
+            return empty( $data ) ? '' : $data->countryCode;
+        }
+
+        return apply_filters( 'getpaid_geolocation_geoip_response_' . $geolocation_service, '', $geolocation_response['body'] );
+
+    }
 
 }

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 )
@@ -255,24 +255,24 @@ 
         check_ajax_referer( 'getpaid_form_nonce' );
 
         // 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( urldecode( $_GET['form'] ) );
-		} else if( ! empty( $_GET['invoice'] ) ) {
-		    getpaid_display_invoice_payment_form( urldecode( $_GET['invoice'] ) );
+        } else if( ! empty( $_GET['invoice'] ) ) {
+            getpaid_display_invoice_payment_form( urldecode( $_GET['invoice'] ) );
         } else {
-			$items = getpaid_convert_items_to_array( urldecode( $_GET['item'] ) );
-		    getpaid_display_item_payment_form( $items );
+            $items = getpaid_convert_items_to_array( urldecode( $_GET['item'] ) );
+            getpaid_display_item_payment_form( $items );
         }
 
         exit;

Spacing +198 added lines, -198 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();
 		}
 
@@ -101,36 +101,36 @@ 
             'payment_form_refresh_prices' => 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);
             }
         }
 
@@ -138,16 +138,16 @@ 
     }
 
     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();
@@ -165,34 +165,34 @@ 
     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);
 
     }
 
@@ -202,47 +202,47 @@ 
     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);
         }
     }
 
@@ -252,27 +252,27 @@ 
     public static function get_payment_form() {
 
         // Check nonce.
-        check_ajax_referer( 'getpaid_form_nonce' );
+        check_ajax_referer('getpaid_form_nonce');
 
         // 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( urldecode( $_GET['form'] ) );
-		} else if( ! empty( $_GET['invoice'] ) ) {
-		    getpaid_display_invoice_payment_form( urldecode( $_GET['invoice'] ) );
+		if (!empty($_GET['form'])) {
+            getpaid_display_payment_form(urldecode($_GET['form']));
+		} else if (!empty($_GET['invoice'])) {
+		    getpaid_display_invoice_payment_form(urldecode($_GET['invoice']));
         } else {
-			$items = getpaid_convert_items_to_array( urldecode( $_GET['item'] ) );
-		    getpaid_display_item_payment_form( $items );
+			$items = getpaid_convert_items_to_array(urldecode($_GET['item']));
+		    getpaid_display_item_payment_form($items);
         }
 
         exit;
@@ -287,17 +287,17 @@ 
     public static function payment_form() {
 
         // 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;
         }
 
         // Process the payment form.
-        $checkout_class = apply_filters( 'getpaid_checkout_class', 'GetPaid_Checkout' );
-        $checkout       = new $checkout_class( new GetPaid_Payment_Form_Submission() );
+        $checkout_class = apply_filters('getpaid_checkout_class', 'GetPaid_Checkout');
+        $checkout       = new $checkout_class(new GetPaid_Payment_Form_Submission());
         $checkout->process_checkout();
 
         exit;
@@ -310,55 +310,55 @@ 
      */
     public static function get_payment_form_states_field() {
 
-        if ( empty( $_GET['country'] ) || empty( $_GET['form'] ) ) {
+        if (empty($_GET['country']) || empty($_GET['form'])) {
             exit;
         }
 
-        $elements = getpaid_get_payment_form_elements( $_GET['form'] );
+        $elements = getpaid_get_payment_form_elements($_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']) {
 
-                $wrap_class  = getpaid_get_form_element_grid_class( $address_field );
-                $wrap_class  = esc_attr( "$wrap_class getpaid-address-field-wrapper" );
-                $placeholder = empty( $address_field['placeholder'] ) ? '' : esc_attr( $address_field['placeholder'] );
-                $description = empty( $address_field['description'] ) ? '' : wp_kses_post( $address_field['description'] );
-                $value       = is_user_logged_in() ? get_user_meta( get_current_user_id(), '_wpinv_state', true ) : '';
-                $label       = empty( $address_field['label'] ) ? '' : wp_kses_post( $address_field['label'] );
+                $wrap_class  = getpaid_get_form_element_grid_class($address_field);
+                $wrap_class  = esc_attr("$wrap_class getpaid-address-field-wrapper");
+                $placeholder = empty($address_field['placeholder']) ? '' : esc_attr($address_field['placeholder']);
+                $description = empty($address_field['description']) ? '' : wp_kses_post($address_field['description']);
+                $value       = is_user_logged_in() ? get_user_meta(get_current_user_id(), '_wpinv_state', true) : '';
+                $label       = empty($address_field['label']) ? '' : wp_kses_post($address_field['label']);
 
-                if ( ! empty( $address_field['required'] ) ) {
+                if (!empty($address_field['required'])) {
                     $label .= "<span class='text-danger'> *</span>";
                 }
 
-                $html = getpaid_get_states_select_markup (
-                    sanitize_text_field( $_GET['country'] ),
+                $html = getpaid_get_states_select_markup(
+                    sanitize_text_field($_GET['country']),
                     $value,
                     $placeholder,
                     $label,
                     $description,
-                    ! empty( $address_field['required'] ),
+                    !empty($address_field['required']),
                     $wrap_class,
-                    wpinv_clean( $_GET['name'] )
+                    wpinv_clean($_GET['name'])
                 );
 
-                wp_send_json_success( $html );
+                wp_send_json_success($html);
                 exit;
 
             }
@@ -374,56 +374,56 @@ 
     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'));
     }
 
     /**
@@ -432,33 +432,33 @@ 
     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'));
     }
 
     /**
@@ -467,50 +467,50 @@ 
     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();
         }
 
@@ -523,11 +523,11 @@ 
         // 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'));
     }
 
     /**
@@ -536,33 +536,33 @@ 
     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();
@@ -573,11 +573,11 @@ 
         // 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'));
     }
 
     /**
@@ -586,39 +586,39 @@ 
     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();
                 }
 
@@ -633,11 +633,11 @@ 
         // 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'));
     }
 
     /**
@@ -646,15 +646,15 @@ 
     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.
@@ -663,8 +663,8 @@ 
             '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',
@@ -674,22 +674,22 @@ 
             )
         );
 
-        $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();
 
 
-        $is_payment_form = ( ! empty( $_GET['post_id'] ) && 'wpi_payment_form' == get_post_type( $_GET['post_id'] ) );
+        $is_payment_form = (!empty($_GET['post_id']) && 'wpi_payment_form' == get_post_type($_GET['post_id']));
 
-        foreach ( $items as $item ) {
-            $item      = new GetPaid_Form_Item( $item );
+        foreach ($items as $item) {
+            $item = new GetPaid_Form_Item($item);
             $data[] = array(
                 'id'        => (int) $item->get_id(),
-                'text'      => strip_tags( $item->get_name() ),
-                'form_data' => $is_payment_form ? $item->prepare_data_for_use( false ) : '',
+                'text'      => strip_tags($item->get_name()),
+                'form_data' => $is_payment_form ? $item->prepare_data_for_use(false) : '',
             );
         }
 
-        wp_send_json_success( $data );
+        wp_send_json_success($data);
 
     }
 
@@ -699,24 +699,24 @@ 
     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',
@@ -730,9 +730,9 @@ 
                 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,
@@ -746,7 +746,7 @@ 
         wp_send_json_success(
             array(
                 'html'   => $html,
-                'select' => ! empty ( $states )
+                'select' => !empty ($states)
             )
         );
 
@@ -760,11 +760,11 @@ 
     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;
         }
 
@@ -772,18 +772,18 @@ 
         $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;
         }
 
         // Prepare the response.
-        $response = new GetPaid_Payment_Form_Submission_Refresh_Prices( $submission );
+        $response = new GetPaid_Payment_Form_Submission_Refresh_Prices($submission);
         
         // Filter the response.
-        $response = apply_filters( 'getpaid_payment_form_ajax_refresh_prices', $response->response, $submission );
+        $response = apply_filters('getpaid_payment_form_ajax_refresh_prices', $response->response, $submission);
 
-        wp_send_json_success( $response );
+        wp_send_json_success($response);
     }
 
 }