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Editing: class-astra-widget-importer.php

<?php
/**
 * Widget Importer Exporter
 * https://github.com/churchthemes/widget-importer-exporter
 *
 * Released under the GNU General Public License v2.0
 * https://github.com/churchthemes/widget-importer-exporter/blob/master/license.txt
 *
 * Widget Data exporter class.
 *
 * @since  2.0.0
 * @package Astra Sites
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Widget Data exporter class.
 */
class Astra_Widget_Importer {

/**
	 * Instance of Astra_Widget_Importer
	 *
	 * @var Astra_Widget_Importer
	 */
	private static $instance = null;

/**
	 * Instance
	 *
	 * @return object
	 */
	public static function instance() {

if ( ! isset( self::$instance ) ) {
			self::$instance = new self();
		}

return self::$instance;
	}

/**
	 * Available widgets
	 *
	 * Gather site's widgets into array with ID base, name, etc.
	 * Used by export and import functions.
	 *
	 * @since 0.4
	 * @global array $wp_registered_widget_updates
	 * @return array Widget information
	 */
	public function wie_available_widgets() {

global $wp_registered_widget_controls;

$widget_controls = $wp_registered_widget_controls;

$available_widgets = array();

foreach ( $widget_controls as $widget ) {

if ( ! empty( $widget['id_base'] ) && ! isset( $available_widgets[ $widget['id_base'] ] ) ) { // no dupes.

$available_widgets[ $widget['id_base'] ]['id_base'] = $widget['id_base'];
				$available_widgets[ $widget['id_base'] ]['name']    = $widget['name'];

}
		}

return apply_filters( 'wie_available_widgets', $available_widgets );
	}

/**
	 * Import widget JSON data
	 *
	 * @since 0.4
	 * @global array $wp_registered_sidebars
	 *
	 * @param object $data JSON widget data from .wie file.
	 *
	 * @return array Results array
	 */
	public function import_widgets_data( $data ) {

global $wp_registered_sidebars;

// Have valid data?
		// If no data or could not decode.
		if ( empty( $data ) || ! is_object( $data ) ) {
			wp_die(
				esc_html__( 'Import data could not be read. Please try a different file.', 'astra-sites' ),
				'',
				array(
					'back_link' => true,
				)
			);
		}

// Hook before import.
		do_action( 'wie_before_import' );
		$data = apply_filters( 'wie_import_data', $data );

// Get all available widgets site supports.
		$available_widgets = $this->wie_available_widgets();

// Get all existing widget instances.
		$widget_instances = array();
		foreach ( $available_widgets as $widget_data ) {
			$widget_instances[ $widget_data['id_base'] ] = get_option( 'widget_' . $widget_data['id_base'] );
		}

// Begin results.
		$results = array();

// Loop import data's sidebars.
		foreach ( $data as $sidebar_id => $widgets ) {

// Skip inactive widgets.
			// (should not be in export file).
			if ( 'wp_inactive_widgets' === $sidebar_id ) {
				continue;
			}

// Check if sidebar is available on this site.
			// Otherwise add widgets to inactive, and say so.
			if ( isset( $wp_registered_sidebars[ $sidebar_id ] ) ) {
				$sidebar_available    = true;
				$use_sidebar_id       = $sidebar_id;
				$sidebar_message_type = 'success';
				$sidebar_message      = '';
			} else {
				$sidebar_available    = false;
				$use_sidebar_id       = 'wp_inactive_widgets'; // add to inactive if sidebar does not exist in theme.
				$sidebar_message_type = 'error';
				$sidebar_message      = esc_html__( 'Widget area does not exist in theme (using Inactive)', 'astra-sites' );
			}

// Result for sidebar.
			$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.
			$results[ $sidebar_id ]['message_type'] = $sidebar_message_type;
			$results[ $sidebar_id ]['message']      = $sidebar_message;
			$results[ $sidebar_id ]['widgets']      = array();

// Loop widgets.
			foreach ( $widgets as $widget_instance_id => $widget ) {

$fail = false;

// Get id_base (remove -# from end) and instance ID number.
				$id_base            = preg_replace( '/-[0-9]+$/', '', $widget_instance_id );
				$instance_id_number = str_replace( $id_base . '-', '', $widget_instance_id );

// Does site support this widget?
				if ( ! $fail && ! isset( $available_widgets[ $id_base ] ) ) {
					$fail                = true;
					$widget_message_type = 'error';
					$widget_message      = esc_html__( 'Site does not support widget', 'astra-sites' ); // explain why widget not imported.
				}

// Filter to modify settings object before conversion to array and import.
				// Leave this filter here for backwards compatibility with manipulating objects (before conversion to array below).
				// Ideally the newer wie_widget_settings_array below will be used instead of this.
				$widget = apply_filters( 'wie_widget_settings', $widget ); // object.

// Convert multidimensional objects to multidimensional arrays
				// Some plugins like Jetpack Widget Visibility store settings as multidimensional arrays
				// Without this, they are imported as objects and cause fatal error on Widgets page
				// 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
				// It is probably much more likely that arrays are used than objects, however.
				$widget = json_decode( wp_json_encode( $widget ), true );

// Filter to modify settings array
				// This is preferred over the older wie_widget_settings filter above.
				// Do before identical check because changes may make it identical to end result (such as URL replacements).
				$widget = apply_filters( 'wie_widget_settings_array', $widget );

// Does widget with identical settings already exist in same sidebar?
				if ( ! $fail && isset( $widget_instances[ $id_base ] ) ) {

// Get existing widgets in this sidebar.
					$sidebars_widgets = get_option( 'sidebars_widgets' );
					$sidebar_widgets  = isset( $sidebars_widgets[ $use_sidebar_id ] ) ? $sidebars_widgets[ $use_sidebar_id ] : array(); // check Inactive if that's where will go.

// Loop widgets with ID base.
					$single_widget_instances = ! empty( $widget_instances[ $id_base ] ) ? $widget_instances[ $id_base ] : array();
					foreach ( $single_widget_instances as $check_id => $check_widget ) {

// Is widget in same sidebar and has identical settings?
						if ( in_array( "$id_base-$check_id", $sidebar_widgets, true ) && (array) $widget === $check_widget ) {

$fail                = true;
							$widget_message_type = 'warning';
							$widget_message      = esc_html__( 'Widget already exists', 'astra-sites' ); // explain why widget not imported.

break;

}
					}
				}

// No failure.
				if ( ! $fail ) {

// Add widget instance.
					$single_widget_instances   = get_option( 'widget_' . $id_base ); // all instances for that widget ID base, get fresh every time.
					$single_widget_instances   = ! empty( $single_widget_instances ) ? $single_widget_instances : array(
						'_multiwidget' => 1,
					); // start fresh if have to.
					$single_widget_instances[] = $widget; // add it.

// Get the key it was given.
					end( $single_widget_instances );
					$new_instance_id_number = key( $single_widget_instances );

// If key is 0, make it 1.
					// 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).
					if ( '0' === strval( $new_instance_id_number ) ) {
						$new_instance_id_number                             = 1;
						$single_widget_instances[ $new_instance_id_number ] = $single_widget_instances[0];
						unset( $single_widget_instances[0] );
					}

// Move _multiwidget to end of array for uniformity.
					if ( isset( $single_widget_instances['_multiwidget'] ) ) {
						$multiwidget = $single_widget_instances['_multiwidget'];
						unset( $single_widget_instances['_multiwidget'] );
						$single_widget_instances['_multiwidget'] = $multiwidget;
					}

// Update option with new widget.
					$result = update_option( 'widget_' . $id_base, $single_widget_instances );

// Assign widget instance to sidebar.
					$sidebars_widgets = get_option( 'sidebars_widgets' ); // which sidebars have which widgets, get fresh every time.

// Avoid rarely fatal error when the option is an empty string.
					// https://github.com/churchthemes/widget-importer-exporter/pull/11.
					if ( ! $sidebars_widgets ) {
						$sidebars_widgets = array();
					}

$new_instance_id                       = $id_base . '-' . $new_instance_id_number; // use ID number from new widget instance.
					$sidebars_widgets[ $use_sidebar_id ][] = $new_instance_id; // add new instance to sidebar.
					update_option( 'sidebars_widgets', $sidebars_widgets ); // save the amended data.

// After widget import action.
					$after_widget_import = array(
						'sidebar'           => $use_sidebar_id,
						'sidebar_old'       => $sidebar_id,
						'widget'            => $widget,
						'widget_type'       => $id_base,
						'widget_id'         => $new_instance_id,
						'widget_id_old'     => $widget_instance_id,
						'widget_id_num'     => $new_instance_id_number,
						'widget_id_num_old' => $instance_id_number,
					);
					do_action( 'wie_after_widget_import', $after_widget_import );

// Success message.
					if ( $sidebar_available ) {
						$widget_message_type = 'success';
						$widget_message      = esc_html__( 'Imported', 'astra-sites' );
					} else {
						$widget_message_type = 'warning';
						$widget_message      = esc_html__( 'Imported to Inactive', 'astra-sites' );
					}
				}

// Result for widget instance.
				$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).
				$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['title']        = ! empty( $widget['title'] ) ? $widget['title'] : esc_html__( 'No Title', 'astra-sites' ); // show "No Title" if widget instance is untitled.
				$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['message_type'] = $widget_message_type;
				$results[ $sidebar_id ]['widgets'][ $widget_instance_id ]['message']      = $widget_message;

}
		}

// Hook after import.
		do_action( 'wie_after_import' );

// Return results.
		return apply_filters( 'wie_import_results', $results );

}