342 lines
12 KiB
PHP
342 lines
12 KiB
PHP
<?php
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/**
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* Class for the widget importer.
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*
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* Code is mostly from the Widget Importer & Exporter plugin.
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*
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* @see https://wordpress.org/plugins/widget-importer-exporter/
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*
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* @package Merlin WP
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*/
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class Merlin_Widget_Importer {
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/**
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* Import widgets from WIE or JSON file.
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*
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* @param string $widget_import_file_path path to the widget import file.
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*/
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public static function import( $widget_import_file_path ) {
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if ( empty( $widget_import_file_path ) ) {
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return false;
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}
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self::unset_default_widgets();
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$results = self::import_widgets( $widget_import_file_path );
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if ( is_wp_error( $results ) ) {
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Merlin_Logger::get_instance()->error( $results->get_error_message() );
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return false;
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}
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ob_start();
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self::format_results_for_log( $results );
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$message = ob_get_clean();
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Merlin_Logger::get_instance()->debug( $message );
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return true;
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}
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/**
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* Imports widgets from a json file.
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*
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* @param string $data_file path to json file with WordPress widget export data.
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*/
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private static function import_widgets( $data_file ) {
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// Get widgets data from file.
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$data = self::process_import_file( $data_file );
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// Return from this function if there was an error.
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if ( is_wp_error( $data ) ) {
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return $data;
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}
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// Import the widget data and save the results.
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return self::import_data( $data );
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}
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/**
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* Process import file - this parses the widget data and returns it.
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*
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* @param string $file path to json file.
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* @return WP_Error|object
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*/
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private static function process_import_file( $file ) {
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// File exists?
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if ( ! file_exists( $file ) ) {
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return new \WP_Error(
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'widget_import_file_not_found',
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__( 'Error: Widget import file could not be found.', 'thinkai' )
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);
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}
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// Get file contents and decode.
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$data = thinkai_filesystem()->get_contents( $file );
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// Return from this function if there was an error.
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if ( empty( $data ) ) {
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return new \WP_Error(
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'widget_import_file_missing_content',
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__( 'Error: Widget import file does not have any content in it.', 'thinkai' )
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);
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}
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return json_decode( $data );
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}
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/**
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* Import widget JSON data
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*
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* @global array $wp_registered_sidebars
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* @param object $data JSON widget data.
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* @return array|WP_Error
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*/
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private static function import_data( $data ) {
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global $wp_registered_sidebars;
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// Have valid data? If no data or could not decode.
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if ( empty( $data ) || ! is_object( $data ) ) {
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return new \WP_Error(
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'corrupted_widget_import_data',
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__( 'Error: Widget import data could not be read. Please try a different file.', 'thinkai' )
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);
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}
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// Hook before import.
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do_action( 'merlin_widget_importer_before_widgets_import', $data );
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$data = apply_filters( 'merlin_before_widgets_import_data', $data );
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// Get all available widgets site supports.
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$available_widgets = self::available_widgets();
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// Get all existing widget instances.
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$widget_instances = array();
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foreach ( $available_widgets as $widget_data ) {
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$widget_instances[ $widget_data['id_base'] ] = get_option( 'widget_' . $widget_data['id_base'] );
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}
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// Begin results.
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$results = array();
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// Loop import data's sidebars.
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foreach ( $data as $sidebar_id => $widgets ) {
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// Skip inactive widgets (should not be in export file).
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if ( 'wp_inactive_widgets' == $sidebar_id ) {
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continue;
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}
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// Check if sidebar is available on this site. Otherwise add widgets to inactive, and say so.
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if ( isset( $wp_registered_sidebars[ $sidebar_id ] ) ) {
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$sidebar_available = true;
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$use_sidebar_id = $sidebar_id;
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$sidebar_message_type = 'success';
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$sidebar_message = '';
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}
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else {
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$sidebar_available = false;
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$use_sidebar_id = 'wp_inactive_widgets'; // Add to inactive if sidebar does not exist in theme.
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$sidebar_message_type = 'error';
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$sidebar_message = __( 'Sidebar does not exist in theme (moving widget to Inactive)', 'thinkai' );
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}
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// Result for sidebar.
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$results[ $sidebar_id ]['name'] = ! empty( $wp_registered_sidebars[ $sidebar_id ]['name'] ) ? $wp_registered_sidebars[ $sidebar_id ]['name'] : $sidebar_id; // Sidebar name if theme supports it; otherwise ID.
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$results[ $sidebar_id ]['message_type'] = $sidebar_message_type;
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$results[ $sidebar_id ]['message'] = $sidebar_message;
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$results[ $sidebar_id ]['widgets'] = array();
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// Loop widgets.
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foreach ( $widgets as $widget_instance_id => $widget ) {
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$fail = false;
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// Get id_base (remove -# from end) and instance ID number.
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$id_base = preg_replace( '/-[0-9]+$/', '', $widget_instance_id );
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$instance_id_number = str_replace( $id_base . '-', '', $widget_instance_id );
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// Does site support this widget?
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if ( ! $fail && ! isset( $available_widgets[ $id_base ] ) ) {
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$fail = true;
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$widget_message_type = 'error';
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$widget_message = __( 'Site does not support widget', 'thinkai' ); // Explain why widget not imported.
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}
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// Filter to modify settings object before conversion to array and import.
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// Leave this filter here for backwards compatibility with manipulating objects (before conversion to array below).
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// Ideally the newer wie_widget_settings_array below will be used instead of this.
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$widget = apply_filters( 'merlin_widget_settings', $widget ); // Object.
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// Convert multidimensional objects to multidimensional arrays.
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// Some plugins like Jetpack Widget Visibility store settings as multidimensional arrays.
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// Without this, they are imported as objects and cause fatal error on Widgets page.
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// If this creates problems for plugins that do actually intend settings in objects then may need to consider other approach: https://wordpress.org/support/topic/problem-with-array-of-arrays.
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// It is probably much more likely that arrays are used than objects, however.
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$widget = json_decode( json_encode( $widget ), true );
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// Filter to modify settings array.
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// This is preferred over the older wie_widget_settings filter above.
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// Do before identical check because changes may make it identical to end result (such as URL replacements).
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$widget = apply_filters( 'merlin_widget_settings_array', $widget );
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// Does widget with identical settings already exist in same sidebar?
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if ( ! $fail && isset( $widget_instances[ $id_base ] ) ) {
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// Get existing widgets in this sidebar.
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$sidebars_widgets = get_option( 'sidebars_widgets' );
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$sidebar_widgets = isset( $sidebars_widgets[ $use_sidebar_id ] ) ? $sidebars_widgets[ $use_sidebar_id ] : array(); // Check Inactive if that's where will go.
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// Loop widgets with ID base.
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$single_widget_instances = ! empty( $widget_instances[ $id_base ] ) ? $widget_instances[ $id_base ] : array();
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foreach ( $single_widget_instances as $check_id => $check_widget ) {
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// Is widget in same sidebar and has identical settings?
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if ( in_array( "$id_base-$check_id", $sidebar_widgets ) && (array) $widget == $check_widget ) {
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$fail = true;
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$widget_message_type = 'warning';
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$widget_message = __( 'Widget already exists', 'thinkai' ); // Explain why widget not imported.
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break;
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}
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}
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}
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// No failure.
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if ( ! $fail ) {
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// Add widget instance.
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$single_widget_instances = get_option( 'widget_' . $id_base ); // All instances for that widget ID base, get fresh every time.
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$single_widget_instances = ! empty( $single_widget_instances ) ? $single_widget_instances : array( '_multiwidget' => 1 ); // Start fresh if have to.
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$single_widget_instances[] = $widget; // Add it.
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// Get the key it was given.
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end( $single_widget_instances );
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$new_instance_id_number = key( $single_widget_instances );
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// If key is 0, make it 1.
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// When 0, an issue can occur where adding a widget causes data from other widget to load, and the widget doesn't stick (reload wipes it).
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if ( '0' === strval( $new_instance_id_number ) ) {
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$new_instance_id_number = 1;
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$single_widget_instances[ $new_instance_id_number ] = $single_widget_instances[0];
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unset( $single_widget_instances[0] );
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}
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// Move _multiwidget to end of array for uniformity.
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if ( isset( $single_widget_instances['_multiwidget'] ) ) {
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$multiwidget = $single_widget_instances['_multiwidget'];
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unset( $single_widget_instances['_multiwidget'] );
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$single_widget_instances['_multiwidget'] = $multiwidget;
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}
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// Update option with new widget.
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update_option( 'widget_' . $id_base, $single_widget_instances );
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// Assign widget instance to sidebar.
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$sidebars_widgets = get_option( 'sidebars_widgets' ); // Which sidebars have which widgets, get fresh every time.
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$new_instance_id = $id_base . '-' . $new_instance_id_number; // Use ID number from new widget instance.
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$sidebars_widgets[ $use_sidebar_id ][] = $new_instance_id; // Add new instance to sidebar.
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update_option( 'sidebars_widgets', $sidebars_widgets ); // Save the amended data.
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// After widget import action.
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$after_widget_import = array(
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'sidebar' => $use_sidebar_id,
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'sidebar_old' => $sidebar_id,
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'widget' => $widget,
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'widget_type' => $id_base,
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'widget_id' => $new_instance_id,
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'widget_id_old' => $widget_instance_id,
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'widget_id_num' => $new_instance_id_number,
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'widget_id_num_old' => $instance_id_number,
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);
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do_action( 'merlin_widget_importer_after_single_widget_import', $after_widget_import );
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// Success message.
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if ( $sidebar_available ) {
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$widget_message_type = 'success';
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$widget_message = __( 'Imported', 'thinkai' );
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}
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else {
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$widget_message_type = 'warning';
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$widget_message = __( 'Imported to Inactive', 'thinkai' );
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}
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}
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// Result for widget instance.
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$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['name'] = isset( $available_widgets[ $id_base ]['name'] ) ? $available_widgets[ $id_base ]['name'] : $id_base; // Widget name or ID if name not available (not supported by site).
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$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['title'] = ! empty( $widget['title'] ) ? $widget['title'] : __( 'No Title', 'thinkai' ); // Show "No Title" if widget instance is untitled.
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$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['message_type'] = $widget_message_type;
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$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['message'] = $widget_message;
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}
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}
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// Hook after import.
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do_action( 'merlin_widget_importer_after_widgets_import', $data );
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// Return results.
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return apply_filters( 'merlin_widget_import_results', $results );
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}
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/**
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* Available widgets.
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*
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* Gather site's widgets into array with ID base, name, etc.
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*
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* @global array $wp_registered_widget_controls
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* @return array $available_widgets, Widget information
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*/
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private static function available_widgets() {
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global $wp_registered_widget_controls;
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$widget_controls = $wp_registered_widget_controls;
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$available_widgets = array();
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foreach ( $widget_controls as $widget ) {
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if ( ! empty( $widget['id_base'] ) && ! isset( $available_widgets[ $widget['id_base'] ] ) ) {
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$available_widgets[ $widget['id_base'] ]['id_base'] = $widget['id_base'];
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$available_widgets[ $widget['id_base'] ]['name'] = $widget['name'];
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}
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}
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return apply_filters( 'merlin_available_widgets', $available_widgets );
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}
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/**
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* Remove widgets from sidebars.
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* By default none are removed, but with the filter you can remove them.
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*/
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private static function unset_default_widgets() {
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$widget_areas = apply_filters( 'merlin_unset_default_widgets_args', false );
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if ( empty( $widget_areas ) ) {
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return false;
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}
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update_option( 'sidebars_widgets', $widget_areas );
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}
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/**
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* Format results for log file
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*
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* @param array $results widget import results.
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*/
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private static function format_results_for_log( $results ) {
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if ( empty( $results ) ) {
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esc_html_e( 'No results for widget import!', 'thinkai' );
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}
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// Loop sidebars.
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foreach ( $results as $sidebar ) {
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echo esc_html( $sidebar['name'] ) . ' : ' . esc_html( $sidebar['message'] ) . PHP_EOL . PHP_EOL;
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// Loop widgets.
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foreach ( $sidebar['widgets'] as $widget ) {
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echo esc_html( $widget['name'] ) . ' - ' . esc_html( $widget['title'] ) . ' - ' . esc_html( $widget['message'] ) . PHP_EOL;
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}
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echo PHP_EOL;
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}
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}
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}
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