AyeCode / invoicing

includes/admin/class-getpaid-post-types-admin.php

Indentation +700 added lines, -700 removed lines

@@ -13,703 +13,703 @@ 
 class GetPaid_Post_Types_Admin {
 
     /**
-	 * Hook in methods.
-	 */
-	public static function init() {
-
-		// Init metaboxes.
-		GetPaid_Metaboxes::init();
-
-		// Filter the post updated messages.
-		add_filter( 'post_updated_messages', 'GetPaid_Post_Types_Admin::post_updated_messages' );
-
-		// Filter post actions.
-		add_filter( 'post_row_actions', 'GetPaid_Post_Types_Admin::post_row_actions', 10, 2 );
-		add_filter( 'post_row_actions', 'GetPaid_Post_Types_Admin::filter_invoice_row_actions', 90, 2 );
-
-		// Invoice table columns.
-		add_filter( 'manage_wpi_invoice_posts_columns', array( __CLASS__, 'invoice_columns' ), 100 );
-		add_action( 'manage_wpi_invoice_posts_custom_column', array( __CLASS__, 'display_invoice_columns' ), 10, 2 );
-		add_filter( 'bulk_actions-edit-wpi_invoice', array( __CLASS__, 'invoice_bulk_actions' ) );
-		add_filter( 'handle_bulk_actions-edit-wpi_invoice', array( __CLASS__, 'handle_invoice_bulk_actions' ), 10, 3 );
-
-		// Items table columns.
-		add_filter( 'manage_wpi_item_posts_columns', array( __CLASS__, 'item_columns' ), 100 );
-		add_filter( 'manage_edit-wpi_item_sortable_columns', array( __CLASS__, 'sortable_item_columns' ), 20 );
-		add_action( 'manage_wpi_item_posts_custom_column', array( __CLASS__, 'display_item_columns' ), 10, 2 );
-		add_action( 'restrict_manage_posts', array( __CLASS__, 'add_item_filters' ), 100 );
-		add_action( 'parse_query', array( __CLASS__, 'filter_item_query' ), 100 );
-		add_action( 'request', array( __CLASS__, 'reorder_items' ), 100 );
-
-		// Payment forms columns.
-		add_filter( 'manage_wpi_payment_form_posts_columns', array( __CLASS__, 'payment_form_columns' ), 100 );
-		add_action( 'manage_wpi_payment_form_posts_custom_column', array( __CLASS__, 'display_payment_form_columns' ), 10, 2 );
-		add_filter( 'display_post_states', array( __CLASS__, 'filter_payment_form_state' ), 10, 2 );
-
-		// Discount table columns.
-		add_filter( 'manage_wpi_discount_posts_columns', array( __CLASS__, 'discount_columns' ), 100 );
-		add_filter( 'bulk_actions-edit-wpi_discount', '__return_empty_array', 100 );
-
-		// Deleting posts.
-		add_action( 'delete_post', array( __CLASS__, 'delete_post' ) );
-		add_filter( 'display_post_states', array( __CLASS__, 'filter_discount_state' ), 10, 2 );
-
-		add_filter( 'display_post_states', array( __CLASS__, 'add_display_post_states' ), 10, 2 );
-	}
-
-	/**
-	 * Post updated messages.
-	 */
-	public static function post_updated_messages( $messages ) {
-		global $post;
-
-		$messages['wpi_discount'] = array(
-			0   => '',
-			1   => __( 'Discount updated.', 'invoicing' ),
-			2   => __( 'Custom field updated.', 'invoicing' ),
-			3   => __( 'Custom field deleted.', 'invoicing' ),
-			4   => __( 'Discount updated.', 'invoicing' ),
-			5   => isset( $_GET['revision'] ) ? wp_sprintf( __( 'Discount restored to revision from %s', 'invoicing' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
-			6   => __( 'Discount updated.', 'invoicing' ),
-			7   => __( 'Discount saved.', 'invoicing' ),
-			8   => __( 'Discount submitted.', 'invoicing' ),
-			9   => wp_sprintf( __( 'Discount scheduled for: <strong>%1$s</strong>.', 'invoicing' ), date_i18n( __( 'M j, Y @ G:i', 'invoicing' ), strtotime( $post->post_date ) ) ),
-			10  => __( 'Discount draft updated.', 'invoicing' ),
-		);
-
-		$messages['wpi_payment_form'] = array(
-			0   => '',
-			1   => __( 'Payment Form updated.', 'invoicing' ),
-			2   => __( 'Custom field updated.', 'invoicing' ),
-			3   => __( 'Custom field deleted.', 'invoicing' ),
-			4   => __( 'Payment Form updated.', 'invoicing' ),
-			5   => isset( $_GET['revision'] ) ? wp_sprintf( __( 'Payment Form restored to revision from %s', 'invoicing' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
-			6   => __( 'Payment Form updated.', 'invoicing' ),
-			7   => __( 'Payment Form saved.', 'invoicing' ),
-			8   => __( 'Payment Form submitted.', 'invoicing' ),
-			9   => wp_sprintf( __( 'Payment Form scheduled for: <strong>%1$s</strong>.', 'invoicing' ), date_i18n( __( 'M j, Y @ G:i', 'invoicing' ), strtotime( $post->post_date ) ) ),
-			10  => __( 'Payment Form draft updated.', 'invoicing' ),
-		);
-
-		return $messages;
-
-	}
-
-	/**
-	 * Post row actions.
-	 */
-	public static function post_row_actions( $actions, $post ) {
-
-		$post = get_post( $post );
-
-		// We do not want to edit the default payment form.
-		if ( 'wpi_payment_form' == $post->post_type ) {
-
-			if ( $post->ID == wpinv_get_default_payment_form() ) {
-				unset( $actions['trash'] );
-				unset( $actions['inline hide-if-no-js'] );
-			}
-
-			$actions['duplicate'] =  sprintf(
-				'<a href="%1$s">%2$s</a>',
-				esc_url(
-					wp_nonce_url(
-						add_query_arg(
-							array(
-								'getpaid-admin-action' => 'duplicate_form',
-								'form_id'              => $post->ID
-							)
-						),
-						'getpaid-nonce',
-						'getpaid-nonce'
-					)
-				),
-				esc_html( __( 'Duplicate', 'invoicing' ) )
-			);
-
-		}
-
-		return $actions;
-	}
-
-	/**
+     * Hook in methods.
+     */
+    public static function init() {
+
+        // Init metaboxes.
+        GetPaid_Metaboxes::init();
+
+        // Filter the post updated messages.
+        add_filter( 'post_updated_messages', 'GetPaid_Post_Types_Admin::post_updated_messages' );
+
+        // Filter post actions.
+        add_filter( 'post_row_actions', 'GetPaid_Post_Types_Admin::post_row_actions', 10, 2 );
+        add_filter( 'post_row_actions', 'GetPaid_Post_Types_Admin::filter_invoice_row_actions', 90, 2 );
+
+        // Invoice table columns.
+        add_filter( 'manage_wpi_invoice_posts_columns', array( __CLASS__, 'invoice_columns' ), 100 );
+        add_action( 'manage_wpi_invoice_posts_custom_column', array( __CLASS__, 'display_invoice_columns' ), 10, 2 );
+        add_filter( 'bulk_actions-edit-wpi_invoice', array( __CLASS__, 'invoice_bulk_actions' ) );
+        add_filter( 'handle_bulk_actions-edit-wpi_invoice', array( __CLASS__, 'handle_invoice_bulk_actions' ), 10, 3 );
+
+        // Items table columns.
+        add_filter( 'manage_wpi_item_posts_columns', array( __CLASS__, 'item_columns' ), 100 );
+        add_filter( 'manage_edit-wpi_item_sortable_columns', array( __CLASS__, 'sortable_item_columns' ), 20 );
+        add_action( 'manage_wpi_item_posts_custom_column', array( __CLASS__, 'display_item_columns' ), 10, 2 );
+        add_action( 'restrict_manage_posts', array( __CLASS__, 'add_item_filters' ), 100 );
+        add_action( 'parse_query', array( __CLASS__, 'filter_item_query' ), 100 );
+        add_action( 'request', array( __CLASS__, 'reorder_items' ), 100 );
+
+        // Payment forms columns.
+        add_filter( 'manage_wpi_payment_form_posts_columns', array( __CLASS__, 'payment_form_columns' ), 100 );
+        add_action( 'manage_wpi_payment_form_posts_custom_column', array( __CLASS__, 'display_payment_form_columns' ), 10, 2 );
+        add_filter( 'display_post_states', array( __CLASS__, 'filter_payment_form_state' ), 10, 2 );
+
+        // Discount table columns.
+        add_filter( 'manage_wpi_discount_posts_columns', array( __CLASS__, 'discount_columns' ), 100 );
+        add_filter( 'bulk_actions-edit-wpi_discount', '__return_empty_array', 100 );
+
+        // Deleting posts.
+        add_action( 'delete_post', array( __CLASS__, 'delete_post' ) );
+        add_filter( 'display_post_states', array( __CLASS__, 'filter_discount_state' ), 10, 2 );
+
+        add_filter( 'display_post_states', array( __CLASS__, 'add_display_post_states' ), 10, 2 );
+    }
+
+    /**
+     * Post updated messages.
+     */
+    public static function post_updated_messages( $messages ) {
+        global $post;
+
+        $messages['wpi_discount'] = array(
+            0   => '',
+            1   => __( 'Discount updated.', 'invoicing' ),
+            2   => __( 'Custom field updated.', 'invoicing' ),
+            3   => __( 'Custom field deleted.', 'invoicing' ),
+            4   => __( 'Discount updated.', 'invoicing' ),
+            5   => isset( $_GET['revision'] ) ? wp_sprintf( __( 'Discount restored to revision from %s', 'invoicing' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
+            6   => __( 'Discount updated.', 'invoicing' ),
+            7   => __( 'Discount saved.', 'invoicing' ),
+            8   => __( 'Discount submitted.', 'invoicing' ),
+            9   => wp_sprintf( __( 'Discount scheduled for: <strong>%1$s</strong>.', 'invoicing' ), date_i18n( __( 'M j, Y @ G:i', 'invoicing' ), strtotime( $post->post_date ) ) ),
+            10  => __( 'Discount draft updated.', 'invoicing' ),
+        );
+
+        $messages['wpi_payment_form'] = array(
+            0   => '',
+            1   => __( 'Payment Form updated.', 'invoicing' ),
+            2   => __( 'Custom field updated.', 'invoicing' ),
+            3   => __( 'Custom field deleted.', 'invoicing' ),
+            4   => __( 'Payment Form updated.', 'invoicing' ),
+            5   => isset( $_GET['revision'] ) ? wp_sprintf( __( 'Payment Form restored to revision from %s', 'invoicing' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
+            6   => __( 'Payment Form updated.', 'invoicing' ),
+            7   => __( 'Payment Form saved.', 'invoicing' ),
+            8   => __( 'Payment Form submitted.', 'invoicing' ),
+            9   => wp_sprintf( __( 'Payment Form scheduled for: <strong>%1$s</strong>.', 'invoicing' ), date_i18n( __( 'M j, Y @ G:i', 'invoicing' ), strtotime( $post->post_date ) ) ),
+            10  => __( 'Payment Form draft updated.', 'invoicing' ),
+        );
+
+        return $messages;
+
+    }
+
+    /**
+     * Post row actions.
+     */
+    public static function post_row_actions( $actions, $post ) {
+
+        $post = get_post( $post );
+
+        // We do not want to edit the default payment form.
+        if ( 'wpi_payment_form' == $post->post_type ) {
+
+            if ( $post->ID == wpinv_get_default_payment_form() ) {
+                unset( $actions['trash'] );
+                unset( $actions['inline hide-if-no-js'] );
+            }
+
+            $actions['duplicate'] =  sprintf(
+                '<a href="%1$s">%2$s</a>',
+                esc_url(
+                    wp_nonce_url(
+                        add_query_arg(
+                            array(
+                                'getpaid-admin-action' => 'duplicate_form',
+                                'form_id'              => $post->ID
+                            )
+                        ),
+                        'getpaid-nonce',
+                        'getpaid-nonce'
+                    )
+                ),
+                esc_html( __( 'Duplicate', 'invoicing' ) )
+            );
+
+        }
+
+        return $actions;
+    }
+
+    /**
      * Remove bulk edit option from admin side quote listing
      *
      * @since    1.0.0
      * @param array $actions post actions
-	 * @param WP_Post $post
+     * @param WP_Post $post
      * @return array $actions actions without edit option
      */
     public static function filter_invoice_row_actions( $actions, $post ) {
 
         if ( getpaid_is_invoice_post_type( $post->post_type ) ) {
 
-			$actions = array();
-			$invoice = new WPInv_Invoice( $post );
-
-			$actions['edit'] =  sprintf(
-				'<a href="%1$s">%2$s</a>',
-				esc_url( get_edit_post_link( $invoice->get_id() ) ),
-				esc_html( __( 'Edit', 'invoicing' ) )
-			);
-
-			if ( ! $invoice->is_draft() ) {
-
-				$actions['view'] =  sprintf(
-					'<a href="%1$s">%2$s</a>',
-					esc_url( $invoice->get_view_url() ),
-					sprintf(
-						esc_html( __( 'View %s', 'invoicing' ) ),
-						getpaid_get_post_type_label( $invoice->get_post_type(), false )
-					)
-				);
-
-				$actions['send'] =  sprintf(
-					'<a href="%1$s">%2$s</a>',
-					esc_url(
-						wp_nonce_url(
-							add_query_arg(
-								array(
-									'getpaid-admin-action' => 'send_invoice',
-									'invoice_id'           => $invoice->get_id()
-								)
-							),
-							'getpaid-nonce',
-							'getpaid-nonce'
-						)
-					),
-					esc_html( __( 'Send to Customer', 'invoicing' ) )
-				);
-
-			}
+            $actions = array();
+            $invoice = new WPInv_Invoice( $post );
+
+            $actions['edit'] =  sprintf(
+                '<a href="%1$s">%2$s</a>',
+                esc_url( get_edit_post_link( $invoice->get_id() ) ),
+                esc_html( __( 'Edit', 'invoicing' ) )
+            );
+
+            if ( ! $invoice->is_draft() ) {
+
+                $actions['view'] =  sprintf(
+                    '<a href="%1$s">%2$s</a>',
+                    esc_url( $invoice->get_view_url() ),
+                    sprintf(
+                        esc_html( __( 'View %s', 'invoicing' ) ),
+                        getpaid_get_post_type_label( $invoice->get_post_type(), false )
+                    )
+                );
+
+                $actions['send'] =  sprintf(
+                    '<a href="%1$s">%2$s</a>',
+                    esc_url(
+                        wp_nonce_url(
+                            add_query_arg(
+                                array(
+                                    'getpaid-admin-action' => 'send_invoice',
+                                    'invoice_id'           => $invoice->get_id()
+                                )
+                            ),
+                            'getpaid-nonce',
+                            'getpaid-nonce'
+                        )
+                    ),
+                    esc_html( __( 'Send to Customer', 'invoicing' ) )
+                );
+
+            }
 
         }
 
         return $actions;
-	}
-
-	/**
-	 * Returns an array of invoice table columns.
-	 */
-	public static function invoice_columns( $columns ) {
-
-		$columns = array(
-			'cb'                => $columns['cb'],
-			'number'            => __( 'Invoice', 'invoicing' ),
-			'customer'          => __( 'Customer', 'invoicing' ),
-			'invoice_date'      => __( 'Created', 'invoicing' ),
-			'payment_date'      => __( 'Completed', 'invoicing' ),
-			'amount'            => __( 'Amount', 'invoicing' ),
-			'recurring'         => __( 'Recurring', 'invoicing' ),
-			'status'            => __( 'Status', 'invoicing' ),
-		);
-
-		return apply_filters( 'wpi_invoice_table_columns', $columns );
-	}
-
-	/**
-	 * Displays invoice table columns.
-	 */
-	public static function display_invoice_columns( $column_name, $post_id ) {
-
-		$invoice = new WPInv_Invoice( $post_id );
-
-		switch ( $column_name ) {
-
-			case 'invoice_date' :
-				$date_time = esc_attr( $invoice->get_created_date() );
-				$date      = getpaid_format_date_value( $date_time, "&mdash;", true );
-				echo "<span title='$date_time'>$date</span>";
-				break;
-
-			case 'payment_date' :
-
-				if ( $invoice->is_paid() ) {
-					$date_time = esc_attr( $invoice->get_completed_date() );
-					$date      = getpaid_format_date_value( $date_time, "&mdash;", true );
-					echo "<span title='$date_time'>$date</span>";
-				} else {
-					echo "&mdash;";
-				}
+    }
+
+    /**
+     * Returns an array of invoice table columns.
+     */
+    public static function invoice_columns( $columns ) {
+
+        $columns = array(
+            'cb'                => $columns['cb'],
+            'number'            => __( 'Invoice', 'invoicing' ),
+            'customer'          => __( 'Customer', 'invoicing' ),
+            'invoice_date'      => __( 'Created', 'invoicing' ),
+            'payment_date'      => __( 'Completed', 'invoicing' ),
+            'amount'            => __( 'Amount', 'invoicing' ),
+            'recurring'         => __( 'Recurring', 'invoicing' ),
+            'status'            => __( 'Status', 'invoicing' ),
+        );
+
+        return apply_filters( 'wpi_invoice_table_columns', $columns );
+    }
+
+    /**
+     * Displays invoice table columns.
+     */
+    public static function display_invoice_columns( $column_name, $post_id ) {
+
+        $invoice = new WPInv_Invoice( $post_id );
+
+        switch ( $column_name ) {
+
+            case 'invoice_date' :
+                $date_time = esc_attr( $invoice->get_created_date() );
+                $date      = getpaid_format_date_value( $date_time, "&mdash;", true );
+                echo "<span title='$date_time'>$date</span>";
+                break;
+
+            case 'payment_date' :
+
+                if ( $invoice->is_paid() ) {
+                    $date_time = esc_attr( $invoice->get_completed_date() );
+                    $date      = getpaid_format_date_value( $date_time, "&mdash;", true );
+                    echo "<span title='$date_time'>$date</span>";
+                } else {
+                    echo "&mdash;";
+                }
 				
-				break;
+                break;
 
-			case 'amount' :
+            case 'amount' :
 
-				$amount = $invoice->get_total();
-				$formated_amount = wpinv_price( $amount, $invoice->get_currency() );
+                $amount = $invoice->get_total();
+                $formated_amount = wpinv_price( $amount, $invoice->get_currency() );
 
-				if ( $invoice->is_refunded() ) {
-					$refunded_amount = wpinv_price( 0, $invoice->get_currency() );
-					echo "<del>$formated_amount</del>&nbsp;<ins>$refunded_amount</ins>";
-				} else {
+                if ( $invoice->is_refunded() ) {
+                    $refunded_amount = wpinv_price( 0, $invoice->get_currency() );
+                    echo "<del>$formated_amount</del>&nbsp;<ins>$refunded_amount</ins>";
+                } else {
 
-					$discount = $invoice->get_total_discount();
+                    $discount = $invoice->get_total_discount();
 
-					if ( ! empty( $discount ) ) {
-						$new_amount = wpinv_price( $amount + $discount, $invoice->get_currency() );
-						echo "<del>$new_amount</del>&nbsp;<ins>$formated_amount</ins>";
-					} else {
-						echo $formated_amount;
-					}
+                    if ( ! empty( $discount ) ) {
+                        $new_amount = wpinv_price( $amount + $discount, $invoice->get_currency() );
+                        echo "<del>$new_amount</del>&nbsp;<ins>$formated_amount</ins>";
+                    } else {
+                        echo $formated_amount;
+                    }
 
-				}
+                }
 
-				break;
+                break;
 
-			case 'status' :
-				$status       = sanitize_text_field( $invoice->get_status() );
-				$status_label = sanitize_text_field( $invoice->get_status_nicename() );
+            case 'status' :
+                $status       = sanitize_text_field( $invoice->get_status() );
+                $status_label = sanitize_text_field( $invoice->get_status_nicename() );
 
-				// If it is paid, show the gateway title.
-				if ( $invoice->is_paid() ) {
-					$gateway = sanitize_text_field( $invoice->get_gateway_title() );
-					$gateway = wp_sprintf( esc_attr__( 'Paid via %s', 'invoicing' ), $gateway );
+                // If it is paid, show the gateway title.
+                if ( $invoice->is_paid() ) {
+                    $gateway = sanitize_text_field( $invoice->get_gateway_title() );
+                    $gateway = wp_sprintf( esc_attr__( 'Paid via %s', 'invoicing' ), $gateway );
 
-					echo "<mark class='wpi-help-tip getpaid-invoice-status $status' title='$gateway'><span>$status_label</span></mark>";
-				} else {
-					echo "<mark class='getpaid-invoice-status $status'><span>$status_label</span></mark>";
-				}
+                    echo "<mark class='wpi-help-tip getpaid-invoice-status $status' title='$gateway'><span>$status_label</span></mark>";
+                } else {
+                    echo "<mark class='getpaid-invoice-status $status'><span>$status_label</span></mark>";
+                }
 
-				// If it is not paid, display the overdue and view status.
-				if ( ! $invoice->is_paid() && ! $invoice->is_refunded() ) {
+                // If it is not paid, display the overdue and view status.
+                if ( ! $invoice->is_paid() && ! $invoice->is_refunded() ) {
 
-					// Invoice view status.
-					if ( wpinv_is_invoice_viewed( $invoice->get_id() ) ) {
-						echo '&nbsp;&nbsp;<i class="fa fa-eye wpi-help-tip" title="'. esc_attr__( 'Viewed by Customer', 'invoicing' ).'"></i>';
-					} else {
-						echo '&nbsp;&nbsp;<i class="fa fa-eye-slash wpi-help-tip" title="'. esc_attr__( 'Not Viewed by Customer', 'invoicing' ).'"></i>';
-					}
+                    // Invoice view status.
+                    if ( wpinv_is_invoice_viewed( $invoice->get_id() ) ) {
+                        echo '&nbsp;&nbsp;<i class="fa fa-eye wpi-help-tip" title="'. esc_attr__( 'Viewed by Customer', 'invoicing' ).'"></i>';
+                    } else {
+                        echo '&nbsp;&nbsp;<i class="fa fa-eye-slash wpi-help-tip" title="'. esc_attr__( 'Not Viewed by Customer', 'invoicing' ).'"></i>';
+                    }
 
-					// Display the overview status.
-					if ( wpinv_get_option( 'overdue_active' ) ) {
-						$due_date = $invoice->get_due_date();
-						$fomatted = getpaid_format_date( $due_date );
+                    // Display the overview status.
+                    if ( wpinv_get_option( 'overdue_active' ) ) {
+                        $due_date = $invoice->get_due_date();
+                        $fomatted = getpaid_format_date( $due_date );
 
-						if ( ! empty( $fomatted ) ) {
-							$date = wp_sprintf( __( 'Due %s', 'invoicing' ), $fomatted );
-							echo "<p class='description' style='color: #888;' title='$due_date'>$fomatted</p>";
-						}
-					}
+                        if ( ! empty( $fomatted ) ) {
+                            $date = wp_sprintf( __( 'Due %s', 'invoicing' ), $fomatted );
+                            echo "<p class='description' style='color: #888;' title='$due_date'>$fomatted</p>";
+                        }
+                    }
 
-				}
+                }
 
-				break;
+                break;
 
-			case 'recurring':
+            case 'recurring':
 
-				if ( $invoice->is_recurring() ) {
-					echo '<i class="fa fa-check" style="color:#43850a;"></i>';
-				} else {
-					echo '<i class="fa fa-times" style="color:#616161;"></i>';
-				}
-				break;
+                if ( $invoice->is_recurring() ) {
+                    echo '<i class="fa fa-check" style="color:#43850a;"></i>';
+                } else {
+                    echo '<i class="fa fa-times" style="color:#616161;"></i>';
+                }
+                break;
 
-			case 'number' :
+            case 'number' :
 
-				$edit_link       = esc_url( get_edit_post_link( $invoice->get_id() ) );
-				$invoice_number  = sanitize_text_field( $invoice->get_number() );
-				$invoice_details = esc_attr__( 'View Invoice Details', 'invoicing' );
+                $edit_link       = esc_url( get_edit_post_link( $invoice->get_id() ) );
+                $invoice_number  = sanitize_text_field( $invoice->get_number() );
+                $invoice_details = esc_attr__( 'View Invoice Details', 'invoicing' );
 
-				echo "<a href='$edit_link' title='$invoice_details'><strong>$invoice_number</strong></a>";
+                echo "<a href='$edit_link' title='$invoice_details'><strong>$invoice_number</strong></a>";
 
-				break;
+                break;
 
-			case 'customer' :
+            case 'customer' :
 	
-				$customer_name = $invoice->get_user_full_name();
+                $customer_name = $invoice->get_user_full_name();
 	
-				if ( empty( $customer_name ) ) {
-					$customer_name = $invoice->get_email();
-				}
+                if ( empty( $customer_name ) ) {
+                    $customer_name = $invoice->get_email();
+                }
 	
-				if ( ! empty( $customer_name ) ) {
-					$customer_details = esc_attr__( 'View Customer Details', 'invoicing' );
-					$view_link        = esc_url( add_query_arg( 'user_id', $invoice->get_user_id(), admin_url( 'user-edit.php' ) ) );
-					echo "<a href='$view_link' title='$customer_details'><span>$customer_name</span></a>";
-				} else {
-					echo '<div>&mdash;</div>';
-				}
+                if ( ! empty( $customer_name ) ) {
+                    $customer_details = esc_attr__( 'View Customer Details', 'invoicing' );
+                    $view_link        = esc_url( add_query_arg( 'user_id', $invoice->get_user_id(), admin_url( 'user-edit.php' ) ) );
+                    echo "<a href='$view_link' title='$customer_details'><span>$customer_name</span></a>";
+                } else {
+                    echo '<div>&mdash;</div>';
+                }
 
-				break;
+                break;
 
-		}
+        }
 
-	}
+    }
 
-	/**
-	 * Displays invoice bulk actions.
-	 */
-	public static function invoice_bulk_actions( $actions ) {
-		$actions['resend-invoice'] = __( 'Send to Customer', 'invoicing' );
-		return $actions;
-	}
+    /**
+     * Displays invoice bulk actions.
+     */
+    public static function invoice_bulk_actions( $actions ) {
+        $actions['resend-invoice'] = __( 'Send to Customer', 'invoicing' );
+        return $actions;
+    }
 
-	/**
-	 * Processes invoice bulk actions.
-	 */
-	public static function handle_invoice_bulk_actions( $redirect_url, $action, $post_ids ) {
+    /**
+     * Processes invoice bulk actions.
+     */
+    public static function handle_invoice_bulk_actions( $redirect_url, $action, $post_ids ) {
 
-		if ( $action == 'resend-invoice' ) {
+        if ( $action == 'resend-invoice' ) {
 
-			$success = false;
-			foreach ( $post_ids as $post_id ) {
-				$success = getpaid()->get( 'invoice_emails' )->user_invoice( new WPInv_Invoice( $post_id ), true );
-			}
+            $success = false;
+            foreach ( $post_ids as $post_id ) {
+                $success = getpaid()->get( 'invoice_emails' )->user_invoice( new WPInv_Invoice( $post_id ), true );
+            }
 
-			if ( $success ) {
-				getpaid_admin()->show_success( __( 'Invoices were successfully sent', 'invoicing' ) );
-			} else {
-				getpaid_admin()->show_error( __( 'Could not send some invoices', 'invoicing' ) );
-			}
+            if ( $success ) {
+                getpaid_admin()->show_success( __( 'Invoices were successfully sent', 'invoicing' ) );
+            } else {
+                getpaid_admin()->show_error( __( 'Could not send some invoices', 'invoicing' ) );
+            }
 
-		}
+        }
 
-		return $redirect_url;
+        return $redirect_url;
 
-	}
+    }
 
-	/**
-	 * Returns an array of payment forms table columns.
-	 */
-	public static function payment_form_columns( $columns ) {
+    /**
+     * Returns an array of payment forms table columns.
+     */
+    public static function payment_form_columns( $columns ) {
 
-		$columns = array(
-			'cb'                => $columns['cb'],
-			'title'             => __( 'Name', 'invoicing' ),
-			'shortcode'         => __( 'Shortcode', 'invoicing' ),
-			'earnings'          => __( 'Revenue', 'invoicing' ),
-			'refunds'           => __( 'Refunded', 'invoicing' ),
-			'items'             => __( 'Items', 'invoicing' ),
-			'date'              => __( 'Date', 'invoicing' ),
-		);
+        $columns = array(
+            'cb'                => $columns['cb'],
+            'title'             => __( 'Name', 'invoicing' ),
+            'shortcode'         => __( 'Shortcode', 'invoicing' ),
+            'earnings'          => __( 'Revenue', 'invoicing' ),
+            'refunds'           => __( 'Refunded', 'invoicing' ),
+            'items'             => __( 'Items', 'invoicing' ),
+            'date'              => __( 'Date', 'invoicing' ),
+        );
 
-		return apply_filters( 'wpi_payment_form_table_columns', $columns );
+        return apply_filters( 'wpi_payment_form_table_columns', $columns );
 
-	}
+    }
 
-	/**
-	 * Displays payment form table columns.
-	 */
-	public static function display_payment_form_columns( $column_name, $post_id ) {
+    /**
+     * Displays payment form table columns.
+     */
+    public static function display_payment_form_columns( $column_name, $post_id ) {
 
-		// Retrieve the payment form.
-		$form = new GetPaid_Payment_Form( $post_id );
+        // Retrieve the payment form.
+        $form = new GetPaid_Payment_Form( $post_id );
 
-		switch ( $column_name ) {
+        switch ( $column_name ) {
 
-			case 'earnings' :
-				echo wpinv_price( $form->get_earned() );
-				break;
+            case 'earnings' :
+                echo wpinv_price( $form->get_earned() );
+                break;
 
-			case 'refunds' :
-				echo wpinv_price( $form->get_refunded() );
-				break;
+            case 'refunds' :
+                echo wpinv_price( $form->get_refunded() );
+                break;
 
-			case 'refunds' :
-				echo wpinv_price( $form->get_refunded() );
-				break;
+            case 'refunds' :
+                echo wpinv_price( $form->get_refunded() );
+                break;
 
-			case 'shortcode' :
+            case 'shortcode' :
 
-				if ( $form->is_default() ) {
-					echo '&mdash;';
-				} else {
-					echo '<input onClick="this.select()" type="text" value="[getpaid form=' . esc_attr( $form->get_id() ) . ']" style="width: 100%;" readonly/>';
-				}
+                if ( $form->is_default() ) {
+                    echo '&mdash;';
+                } else {
+                    echo '<input onClick="this.select()" type="text" value="[getpaid form=' . esc_attr( $form->get_id() ) . ']" style="width: 100%;" readonly/>';
+                }
 
-				break;
+                break;
 
-			case 'items' :
+            case 'items' :
 
-				$items = $form->get_items();
+                $items = $form->get_items();
 
-				if ( $form->is_default() || empty( $items ) ) {
-					echo '&mdash;';
-					return;
-				}
+                if ( $form->is_default() || empty( $items ) ) {
+                    echo '&mdash;';
+                    return;
+                }
 
-				$_items = array();
+                $_items = array();
 
-				foreach ( $items as $item ) {
-					$url = $item->get_edit_url();
+                foreach ( $items as $item ) {
+                    $url = $item->get_edit_url();
 
-					if ( empty( $url ) ) {
-						$_items[] = sanitize_text_field( $item->get_name() );
-					} else {
-						$_items[] = sprintf(
-							'<a href="%s">%s</a>',
-							esc_url( $url ),
-							sanitize_text_field( $item->get_name() )
-						);
-					}
+                    if ( empty( $url ) ) {
+                        $_items[] = sanitize_text_field( $item->get_name() );
+                    } else {
+                        $_items[] = sprintf(
+                            '<a href="%s">%s</a>',
+                            esc_url( $url ),
+                            sanitize_text_field( $item->get_name() )
+                        );
+                    }
 
-				}
+                }
 
-				echo implode( '<br>', $_items );
+                echo implode( '<br>', $_items );
 
-				break;
+                break;
 
-		}
+        }
 
-	}
+    }
 
-	/**
-	 * Filters post states.
-	 */
-	public static function filter_payment_form_state( $post_states, $post ) {
+    /**
+     * Filters post states.
+     */
+    public static function filter_payment_form_state( $post_states, $post ) {
 
-		if ( 'wpi_payment_form' == $post->post_type && wpinv_get_default_payment_form() == $post->ID ) {
-			$post_states[ 'default_form' ] = __( 'Default Payment Form', 'invoicing' );
-		}
+        if ( 'wpi_payment_form' == $post->post_type && wpinv_get_default_payment_form() == $post->ID ) {
+            $post_states[ 'default_form' ] = __( 'Default Payment Form', 'invoicing' );
+        }
 	
-		return $post_states;
-
-	}
-
-	/**
-	 * Returns an array of coupon table columns.
-	 */
-	public static function discount_columns( $columns ) {
-
-		$columns = array(
-			'cb'                => $columns['cb'],
-			'title'             => __( 'Name', 'invoicing' ),
-			'code'              => __( 'Code', 'invoicing' ),
-			'amount'            => __( 'Amount', 'invoicing' ),
-			'usage'             => __( 'Usage / Limit', 'invoicing' ),
-			'start_date'        => __( 'Start Date', 'invoicing' ),
-			'expiry_date'       => __( 'Expiry Date', 'invoicing' ),
-		);
-
-		return apply_filters( 'wpi_discount_table_columns', $columns );
-	}
-
-	/**
-	 * Filters post states.
-	 */
-	public static function filter_discount_state( $post_states, $post ) {
-
-		if ( 'wpi_discount' == $post->post_type ) {
-
-			$discount = new WPInv_Discount( $post );
-
-			$status = $discount->is_expired() ? 'expired' : $discount->get_status();
-
-			if ( $status != 'publish' ) {
-				return array(
-					'discount_status' => wpinv_discount_status( $status ),
-				);
-			}
-
-			return array();
-
-		}
-
-		return $post_states;
-
-	}
-
-	/**
-	 * Returns an array of items table columns.
-	 */
-	public static function item_columns( $columns ) {
-
-		$columns = array(
-			'cb'                => $columns['cb'],
-			'title'             => __( 'Name', 'invoicing' ),
-			'price'             => __( 'Price', 'invoicing' ),
-			'vat_rule'          => __( 'VAT rule', 'invoicing' ),
-			'vat_class'         => __( 'VAT class', 'invoicing' ),
-			'type'              => __( 'Type', 'invoicing' ),
-			'shortcode'         => __( 'Shortcode', 'invoicing' ),
-		);
-
-		if ( ! wpinv_use_taxes() ) {
-			unset( $columns['vat_rule'] );
-			unset( $columns['vat_class'] );
-		}
-
-		return apply_filters( 'wpi_item_table_columns', $columns );
-	}
-
-	/**
-	 * Returns an array of sortable items table columns.
-	 */
-	public static function sortable_item_columns( $columns ) {
-
-		return array_merge(
-			$columns,
-			array(
-				'price'     => 'price',
-				'vat_rule'  => 'vat_rule',
-				'vat_class' => 'vat_class',
-				'type'      => 'type',
-			)
-		);
-
-	}
-
-	/**
-	 * Displays items table columns.
-	 */
-	public static function display_item_columns( $column_name, $post_id ) {
+        return $post_states;
+
+    }
+
+    /**
+     * Returns an array of coupon table columns.
+     */
+    public static function discount_columns( $columns ) {
+
+        $columns = array(
+            'cb'                => $columns['cb'],
+            'title'             => __( 'Name', 'invoicing' ),
+            'code'              => __( 'Code', 'invoicing' ),
+            'amount'            => __( 'Amount', 'invoicing' ),
+            'usage'             => __( 'Usage / Limit', 'invoicing' ),
+            'start_date'        => __( 'Start Date', 'invoicing' ),
+            'expiry_date'       => __( 'Expiry Date', 'invoicing' ),
+        );
+
+        return apply_filters( 'wpi_discount_table_columns', $columns );
+    }
+
+    /**
+     * Filters post states.
+     */
+    public static function filter_discount_state( $post_states, $post ) {
+
+        if ( 'wpi_discount' == $post->post_type ) {
+
+            $discount = new WPInv_Discount( $post );
+
+            $status = $discount->is_expired() ? 'expired' : $discount->get_status();
+
+            if ( $status != 'publish' ) {
+                return array(
+                    'discount_status' => wpinv_discount_status( $status ),
+                );
+            }
+
+            return array();
+
+        }
+
+        return $post_states;
+
+    }
+
+    /**
+     * Returns an array of items table columns.
+     */
+    public static function item_columns( $columns ) {
+
+        $columns = array(
+            'cb'                => $columns['cb'],
+            'title'             => __( 'Name', 'invoicing' ),
+            'price'             => __( 'Price', 'invoicing' ),
+            'vat_rule'          => __( 'VAT rule', 'invoicing' ),
+            'vat_class'         => __( 'VAT class', 'invoicing' ),
+            'type'              => __( 'Type', 'invoicing' ),
+            'shortcode'         => __( 'Shortcode', 'invoicing' ),
+        );
+
+        if ( ! wpinv_use_taxes() ) {
+            unset( $columns['vat_rule'] );
+            unset( $columns['vat_class'] );
+        }
+
+        return apply_filters( 'wpi_item_table_columns', $columns );
+    }
+
+    /**
+     * Returns an array of sortable items table columns.
+     */
+    public static function sortable_item_columns( $columns ) {
+
+        return array_merge(
+            $columns,
+            array(
+                'price'     => 'price',
+                'vat_rule'  => 'vat_rule',
+                'vat_class' => 'vat_class',
+                'type'      => 'type',
+            )
+        );
+
+    }
+
+    /**
+     * Displays items table columns.
+     */
+    public static function display_item_columns( $column_name, $post_id ) {
  
-		$item = new WPInv_Item( $post_id );
+        $item = new WPInv_Item( $post_id );
 
-		switch ( $column_name ) {
+        switch ( $column_name ) {
 
-			case 'price' :
+            case 'price' :
 
-				if ( ! $item->is_recurring() ) {
-					echo $item->get_the_price();
-					break;
-				}
+                if ( ! $item->is_recurring() ) {
+                    echo $item->get_the_price();
+                    break;
+                }
 
-				$price = wp_sprintf(
-					__( '%s / %s', 'invoicing' ),
-					$item->get_the_price(),
-					getpaid_get_subscription_period_label( $item->get_recurring_period(), $item->get_recurring_interval(), '' )
-				);
+                $price = wp_sprintf(
+                    __( '%s / %s', 'invoicing' ),
+                    $item->get_the_price(),
+                    getpaid_get_subscription_period_label( $item->get_recurring_period(), $item->get_recurring_interval(), '' )
+                );
 
-				if ( $item->get_the_price() == $item->get_the_initial_price() ) {
-					echo $price;
-					break;
-				}
+                if ( $item->get_the_price() == $item->get_the_initial_price() ) {
+                    echo $price;
+                    break;
+                }
 
-				echo $item->get_the_initial_price();
+                echo $item->get_the_initial_price();
 
-				echo '<span class="meta">' . wp_sprintf( __( 'then %s', 'invoicing' ), $price )  .'</span>';
-				break;
+                echo '<span class="meta">' . wp_sprintf( __( 'then %s', 'invoicing' ), $price )  .'</span>';
+                break;
 
-			case 'vat_rule' :
-				echo getpaid_get_tax_rule_label( $item->get_vat_rule() );
-				break;
+            case 'vat_rule' :
+                echo getpaid_get_tax_rule_label( $item->get_vat_rule() );
+                break;
 
-			case 'vat_class' :
-				echo getpaid_get_tax_class_label( $item->get_vat_class() );
-				break;
+            case 'vat_class' :
+                echo getpaid_get_tax_class_label( $item->get_vat_class() );
+                break;
 
-			case 'shortcode' :
-				echo '<input onClick="this.select()" type="text" value="[getpaid item=' . esc_attr( $item->get_id() ) . ' button=\'Buy Now\']" style="width: 100%;" readonly/>';
-				break;
+            case 'shortcode' :
+                echo '<input onClick="this.select()" type="text" value="[getpaid item=' . esc_attr( $item->get_id() ) . ' button=\'Buy Now\']" style="width: 100%;" readonly/>';
+                break;
 
-			case 'type' :
-				echo wpinv_item_type( $item->get_id() ) . '<span class="meta">' . $item->get_custom_singular_name() . '</span>';
-				break;
+            case 'type' :
+                echo wpinv_item_type( $item->get_id() ) . '<span class="meta">' . $item->get_custom_singular_name() . '</span>';
+                break;
 
-		}
+        }
 
-	}
+    }
 
-	/**
-	 * Lets users filter items using taxes.
-	 */
-	public static function add_item_filters( $post_type ) {
+    /**
+     * Lets users filter items using taxes.
+     */
+    public static function add_item_filters( $post_type ) {
 
-		// Abort if we're not dealing with items.
-		if ( $post_type != 'wpi_item' ) {
-			return;
-		}
+        // Abort if we're not dealing with items.
+        if ( $post_type != 'wpi_item' ) {
+            return;
+        }
 
-		// Filter by vat rules.
-		if ( wpinv_use_taxes() ) {
+        // Filter by vat rules.
+        if ( wpinv_use_taxes() ) {
 	
-			// Sanitize selected vat rule.
-			$vat_rule   = '';
-			$vat_rules  = getpaid_get_tax_rules();
-			if ( isset( $_GET['vat_rule'] ) ) {
-				$vat_rule   =  $_GET['vat_rule'];
-			}
-
-			// Filter by VAT rule.
-			echo wpinv_html_select(
-				array(
-					'options'          => array_merge(
-						array(
-							'' => __( 'All VAT rules', 'invoicing' )
-						),
-						$vat_rules
-					),
-					'name'             => 'vat_rule',
-					'id'               => 'vat_rule',
-					'selected'         => in_array( $vat_rule, array_keys( $vat_rules ) ) ? $vat_rule : '',
-					'show_option_all'  => false,
-					'show_option_none' => false,
-				)
-			);
-
-			// Filter by VAT class.
+            // Sanitize selected vat rule.
+            $vat_rule   = '';
+            $vat_rules  = getpaid_get_tax_rules();
+            if ( isset( $_GET['vat_rule'] ) ) {
+                $vat_rule   =  $_GET['vat_rule'];
+            }
+
+            // Filter by VAT rule.
+            echo wpinv_html_select(
+                array(
+                    'options'          => array_merge(
+                        array(
+                            '' => __( 'All VAT rules', 'invoicing' )
+                        ),
+                        $vat_rules
+                    ),
+                    'name'             => 'vat_rule',
+                    'id'               => 'vat_rule',
+                    'selected'         => in_array( $vat_rule, array_keys( $vat_rules ) ) ? $vat_rule : '',
+                    'show_option_all'  => false,
+                    'show_option_none' => false,
+                )
+            );
+
+            // Filter by VAT class.
 	
-			// Sanitize selected vat rule.
-			$vat_class   = '';
-			$vat_classes = getpaid_get_tax_classes();
-			if ( isset( $_GET['vat_class'] ) ) {
-				$vat_class   =  $_GET['vat_class'];
-			}
-
-			echo wpinv_html_select(
-				array(
-					'options'          => array_merge(
-						array(
-							'' => __( 'All VAT classes', 'invoicing' )
-						),
-						$vat_classes
-					),
-					'name'             => 'vat_class',
-					'id'               => 'vat_class',
-					'selected'         => in_array( $vat_class, array_keys( $vat_classes ) ) ? $vat_class : '',
-					'show_option_all'  => false,
-					'show_option_none' => false,
-				)
-			);
-
-		}
-
-		// Filter by item type.
-		$type   = '';
-		if ( isset( $_GET['type'] ) ) {
-			$type   =  $_GET['type'];
-		}
-
-		echo wpinv_html_select(
-			array(
-				'options'          => array_merge(
-					array(
-						'' => __( 'All item types', 'invoicing' )
-					),
-					wpinv_get_item_types()
-				),
-				'name'             => 'type',
-				'id'               => 'type',
-				'selected'         => in_array( $type, wpinv_item_types() ) ? $type : '',
-				'show_option_all'  => false,
-				'show_option_none' => false,
-			)
-		);
-
-	}
-
-	/**
-	 * Filters the item query.
-	 */
-	public static function filter_item_query( $query ) {
-
-		// modify the query only if it admin and main query.
-		if ( ! ( is_admin() && $query->is_main_query() ) ){ 
-			return $query;
-		}
-
-		// we want to modify the query for our items.
-		if ( empty( $query->query['post_type'] ) || 'wpi_item' != $query->query['post_type'] ){
-			return $query;
-		}
-
-		if ( empty( $query->query_vars['meta_query'] ) ) {
-			$query->query_vars['meta_query'] = array();
-		}
-
-		// Filter vat rule type
+            // Sanitize selected vat rule.
+            $vat_class   = '';
+            $vat_classes = getpaid_get_tax_classes();
+            if ( isset( $_GET['vat_class'] ) ) {
+                $vat_class   =  $_GET['vat_class'];
+            }
+
+            echo wpinv_html_select(
+                array(
+                    'options'          => array_merge(
+                        array(
+                            '' => __( 'All VAT classes', 'invoicing' )
+                        ),
+                        $vat_classes
+                    ),
+                    'name'             => 'vat_class',
+                    'id'               => 'vat_class',
+                    'selected'         => in_array( $vat_class, array_keys( $vat_classes ) ) ? $vat_class : '',
+                    'show_option_all'  => false,
+                    'show_option_none' => false,
+                )
+            );
+
+        }
+
+        // Filter by item type.
+        $type   = '';
+        if ( isset( $_GET['type'] ) ) {
+            $type   =  $_GET['type'];
+        }
+
+        echo wpinv_html_select(
+            array(
+                'options'          => array_merge(
+                    array(
+                        '' => __( 'All item types', 'invoicing' )
+                    ),
+                    wpinv_get_item_types()
+                ),
+                'name'             => 'type',
+                'id'               => 'type',
+                'selected'         => in_array( $type, wpinv_item_types() ) ? $type : '',
+                'show_option_all'  => false,
+                'show_option_none' => false,
+            )
+        );
+
+    }
+
+    /**
+     * Filters the item query.
+     */
+    public static function filter_item_query( $query ) {
+
+        // modify the query only if it admin and main query.
+        if ( ! ( is_admin() && $query->is_main_query() ) ){ 
+            return $query;
+        }
+
+        // we want to modify the query for our items.
+        if ( empty( $query->query['post_type'] ) || 'wpi_item' != $query->query['post_type'] ){
+            return $query;
+        }
+
+        if ( empty( $query->query_vars['meta_query'] ) ) {
+            $query->query_vars['meta_query'] = array();
+        }
+
+        // Filter vat rule type
         if ( ! empty( $_GET['vat_rule'] ) ) {
             $query->query_vars['meta_query'][] = array(
                 'key'     => '_wpinv_vat_rule',
@@ -734,97 +734,97 @@ 
                 'value'   => sanitize_text_field( $_GET['type'] ),
                 'compare' => '='
             );
-		}
-
-	}
-
-	/**
-	 * Reorders items.
-	 */
-	public static function reorder_items( $vars ) {
-		global $typenow;
-
-		if ( 'wpi_item' !== $typenow || empty( $vars['orderby'] ) ) {
-			return $vars;
-		}
-
-		// By item type.
-		if ( 'type' == $vars['orderby'] ) {
-			return array_merge(
-				$vars,
-				array(
-					'meta_key' => '_wpinv_type',
-					'orderby'  => 'meta_value'
-				)
-			);
-		}
-
-		// By vat class.
-		if ( 'vat_class' == $vars['orderby'] ) {
-			return array_merge(
-				$vars,
-				array(
-					'meta_key' => '_wpinv_vat_class',
-					'orderby'  => 'meta_value'
-				)
-			);
-		}
-
-		// By vat rule.
-		if ( 'vat_rule' == $vars['orderby'] ) {
-			return array_merge(
-				$vars,
-				array(
-					'meta_key' => '_wpinv_vat_rule',
-					'orderby'  => 'meta_value'
-				)
-			);
-		}
-
-		// By price.
-		if ( 'price' == $vars['orderby'] ) {
-			return array_merge(
-				$vars,
-				array(
-					'meta_key' => '_wpinv_price',
-					'orderby'  => 'meta_value_num'
-				)
-			);
-		}
-
-		return $vars;
-
-	}
-
-	/**
-	 * Fired when deleting a post.
-	 */
-	public static function delete_post( $post_id ) {
-
-		switch ( get_post_type( $post_id ) ) {
-
-			case 'wpi_item' :
-				do_action( "getpaid_before_delete_item", new WPInv_Item( $post_id ) );
-				break;
-
-			case 'wpi_payment_form' :
-				do_action( "getpaid_before_delete_payment_form", new GetPaid_Payment_Form( $post_id ) );
-				break;
-
-			case 'wpi_discount' :
-				do_action( "getpaid_before_delete_discount", new WPInv_Discount( $post_id ) );
-				break;
-
-			case 'wpi_invoice' :
-				$invoice = new WPInv_Invoice( $post_id );
-				do_action( "getpaid_before_delete_invoice", $invoice );
-				$invoice->get_data_store()->delete_items( $invoice );
-				$invoice->get_data_store()->delete_special_fields( $invoice );
-				break;
-		}
-	}
-
-	/**
+        }
+
+    }
+
+    /**
+     * Reorders items.
+     */
+    public static function reorder_items( $vars ) {
+        global $typenow;
+
+        if ( 'wpi_item' !== $typenow || empty( $vars['orderby'] ) ) {
+            return $vars;
+        }
+
+        // By item type.
+        if ( 'type' == $vars['orderby'] ) {
+            return array_merge(
+                $vars,
+                array(
+                    'meta_key' => '_wpinv_type',
+                    'orderby'  => 'meta_value'
+                )
+            );
+        }
+
+        // By vat class.
+        if ( 'vat_class' == $vars['orderby'] ) {
+            return array_merge(
+                $vars,
+                array(
+                    'meta_key' => '_wpinv_vat_class',
+                    'orderby'  => 'meta_value'
+                )
+            );
+        }
+
+        // By vat rule.
+        if ( 'vat_rule' == $vars['orderby'] ) {
+            return array_merge(
+                $vars,
+                array(
+                    'meta_key' => '_wpinv_vat_rule',
+                    'orderby'  => 'meta_value'
+                )
+            );
+        }
+
+        // By price.
+        if ( 'price' == $vars['orderby'] ) {
+            return array_merge(
+                $vars,
+                array(
+                    'meta_key' => '_wpinv_price',
+                    'orderby'  => 'meta_value_num'
+                )
+            );
+        }
+
+        return $vars;
+
+    }
+
+    /**
+     * Fired when deleting a post.
+     */
+    public static function delete_post( $post_id ) {
+
+        switch ( get_post_type( $post_id ) ) {
+
+            case 'wpi_item' :
+                do_action( "getpaid_before_delete_item", new WPInv_Item( $post_id ) );
+                break;
+
+            case 'wpi_payment_form' :
+                do_action( "getpaid_before_delete_payment_form", new GetPaid_Payment_Form( $post_id ) );
+                break;
+
+            case 'wpi_discount' :
+                do_action( "getpaid_before_delete_discount", new WPInv_Discount( $post_id ) );
+                break;
+
+            case 'wpi_invoice' :
+                $invoice = new WPInv_Invoice( $post_id );
+                do_action( "getpaid_before_delete_invoice", $invoice );
+                $invoice->get_data_store()->delete_items( $invoice );
+                $invoice->get_data_store()->delete_special_fields( $invoice );
+                break;
+        }
+    }
+
+    /**
      * Add a post display state for special GetPaid pages in the page list table.
      *
      * @param array   $post_states An array of post display states.
@@ -838,22 +838,22 @@ 
             $post_states['getpaid_success_page'] = __( 'GetPaid Receipt Page', 'invoicing' );
         }
 
-		foreach ( getpaid_get_invoice_post_types() as $post_type => $label ) {
+        foreach ( getpaid_get_invoice_post_types() as $post_type => $label ) {
 
-			if ( wpinv_get_option( "{$post_type}_history_page", 0 ) == $post->ID ) {
-				$post_states["getpaid_{$post_type}_history_page"] = sprintf(
-					__( 'GetPaid %s History Page', 'invoicing' ),
-					$label
-				);
-			}
+            if ( wpinv_get_option( "{$post_type}_history_page", 0 ) == $post->ID ) {
+                $post_states["getpaid_{$post_type}_history_page"] = sprintf(
+                    __( 'GetPaid %s History Page', 'invoicing' ),
+                    $label
+                );
+            }
 
-		}
+        }
 		
-		if ( wpinv_get_option( 'invoice_subscription_page', 0 ) == $post->ID ) {
+        if ( wpinv_get_option( 'invoice_subscription_page', 0 ) == $post->ID ) {
             $post_states['getpaid_invoice_subscription_page'] = __( 'GetPaid Subscription Page', 'invoicing' );
         }
 
-		if ( wpinv_get_option( 'checkout_page', 0 ) == $post->ID ) {
+        if ( wpinv_get_option( 'checkout_page', 0 ) == $post->ID ) {
             $post_states['getpaid_checkout_page'] = __( 'GetPaid Checkout Page', 'invoicing' );
         }