<?php
/**
 * Sensor: Widgets
 *
 * Widgets sensor class file.
 *
 * @since     4.6.0
 * @package   wsal
 * @subpackage sensors
 */

declare(strict_types=1);

namespace WSAL\WP_Sensors;

use WSAL\Controllers\Alert_Manager;

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

if ( ! class_exists( '\WSAL\WP_Sensors\WSAL_Sensors_Widgets' ) ) {
	/**
	 * Widgets sensor.
	 *
	 * 2042 User added a new widget
	 * 2043 User modified a widget
	 * 2044 User deleted widget
	 * 2045 User moved widget
	 * 2071 User changed widget position
	 *
	 * @package    wsal
	 * @subpackage sensors
	 */
	class WSAL_Sensors_Widgets {

		/**
		 * Widget Move Data
		 *
		 * @var array
		 *
		 * @since 4.5.0
		 */
		private static $widget_move_data = null;

		/**
		 * Inits the main hooks
		 *
		 * @return void
		 *
		 * @since 4.5.0
		 */
		public static function init() {
			if ( \current_user_can( 'edit_theme_options' ) ) {
				\add_action( 'admin_init', array( __CLASS__, 'event_widget_move' ) );
				\add_action( 'admin_init', array( __CLASS__, 'event_widget_post_move' ) );
			}
			\add_action( 'sidebar_admin_setup', array( __CLASS__, 'event_widget_activity' ) );
		}

		/**
		 * Triggered when a user accesses the admin area.
		 * Moved widget.
		 *
		 * @since 4.5.0
		 */
		public static function event_widget_move() {
			// Filter $_POST array for security.
			$post_array = filter_input_array( INPUT_POST );

			if ( ! isset( $post_array['savewidgets'] ) || false === \check_ajax_referer( 'save-sidebar-widgets', 'savewidgets', false ) ) {
				return;
			}

			if ( isset( $post_array ) && ! empty( $post_array['sidebars'] ) ) {
				$current_sidebars = (array) $post_array['sidebars'];
				$sidebars         = array();
				foreach ( $current_sidebars as $key => $val ) {
					$sb = array();
					if ( ! empty( $val ) ) {
						$val = explode( ',', $val );
						foreach ( $val as $k => $v ) {
							if ( strpos( $v, 'widget-' ) === false ) {
								continue;
							}
							$sb[ $k ] = substr( $v, strpos( $v, '_' ) + 1 );
						}
					}
					$sidebars[ $key ] = $sb;
				}
				$current_sidebars = $sidebars;
				$db_sidebars      = get_option( 'sidebars_widgets' );
				$widget_name      = '';
				$from_sidebar     = '';
				$to_sidebar       = '';
				foreach ( $current_sidebars as $sidebar_name => $values ) {
					if ( is_array( $values ) && ! empty( $values ) && isset( $db_sidebars[ $sidebar_name ] ) ) {
						foreach ( $values as $widget_name ) {
							if ( ! in_array( $widget_name, $db_sidebars[ $sidebar_name ], true ) ) {
								$to_sidebar = $sidebar_name;
								foreach ( $db_sidebars as $name => $v ) {
									if ( is_array( $v ) && ! empty( $v ) && in_array( $widget_name, $v, true ) ) {
										$from_sidebar = $name;
										continue;
									}
								}
							}
						}
					}
				}

				if ( empty( $widget_name ) || empty( $from_sidebar ) || empty( $to_sidebar ) ) {
					return;
				}

				if ( preg_match( '/^sidebar-/', $from_sidebar ) || preg_match( '/^sidebar-/', $to_sidebar ) ) {
					// This option will hold the data needed to trigger the event 2045
					// as at this moment the $wp_registered_sidebars variable is not yet populated
					// so we cannot retrieve the name for sidebar-1 || sidebar-2
					// we will then check for this variable in the EventWidgetPostMove() event.
					self::$widget_move_data = array(
						'widget' => $widget_name,
						'from'   => $from_sidebar,
						'to'     => $to_sidebar,
					);

					return;
				}

				Alert_Manager::trigger_event(
					2045,
					array(
						'WidgetName' => \sanitize_text_field( \wp_unslash( $widget_name ) ),
						'OldSidebar' => \sanitize_text_field( \wp_unslash( $from_sidebar ) ),
						'NewSidebar' => \sanitize_text_field( \wp_unslash( $to_sidebar ) ),
					)
				);
			}
		}

		/**
		 * Triggered when a user accesses the admin area.
		 * Changed widget position or moved widget.
		 *
		 * @since 4.5.0
		 */
		public static function event_widget_post_move() {
			// Filter $_POST array for security.
			$post_array = filter_input_array( INPUT_POST );

			// #!-- generates the event 2071
			if ( isset( $post_array['action'] ) && ( 'widgets-order' === $post_array['action'] ) ) {
				if ( isset( $post_array['sidebars'] ) ) {
					// Get the sidebars from $post_array.
					$request_sidebars = array();
					if ( $post_array['sidebars'] ) {
						foreach ( (array) $post_array['sidebars'] as $key => &$value ) {
							if ( ! empty( $value ) ) {
								// Build the sidebars array.
								$value = explode( ',', $value );
								// Cleanup widgets' name.
								foreach ( $value as $k => &$widget_name ) {
									$widget_name = preg_replace( '/^([a-z]+-[0-9]+)+?_/i', '', $widget_name );
								}
								unset( $widget_name );
								$request_sidebars[ $key ] = $value;
							}
						}
						unset( $value );
					}

					if ( $request_sidebars ) {
						// Get the sidebars from DATABASE.
						$sidebar_widgets = \wp_get_sidebars_widgets();
						// Get global sidebars so we can retrieve the real name of the sidebar.
						global $wp_registered_sidebars;

						// Check in each array if there's any change.
						foreach ( $request_sidebars as $sidebar_name => $widgets ) {
							if ( isset( $sidebar_widgets[ $sidebar_name ] ) ) {
								foreach ( $sidebar_widgets[ $sidebar_name ] as $i => $widget_name ) {
									$index = array_search( $widget_name, $widgets, true );
									// Check to see whether or not the widget has been moved.
									if ( $i != $index ) { // phpcs:ignore
										$sn = $sidebar_name;
										// Try to retrieve the real name of the sidebar, otherwise fall-back to id: $sidebar_name.
										if ( $wp_registered_sidebars && isset( $wp_registered_sidebars[ $sidebar_name ] ) ) {
											$sn = $wp_registered_sidebars[ $sidebar_name ]['name'];
										}
										Alert_Manager::trigger_event(
											2071,
											array(
												'WidgetName' => \sanitize_text_field( \wp_unslash( $widget_name ) ),
												'OldPosition' => $i + 1,
												'NewPosition' => $index + 1,
												'Sidebar' => \sanitize_text_field( \wp_unslash( $sn ) ),
											)
										);
									}
								}
							}
						}
					}
				}
			}
			// #!--
			if ( self::$widget_move_data ) {
				$widget_name  = self::$widget_move_data['widget'];
				$from_sidebar = self::$widget_move_data['from'];
				$to_sidebar   = self::$widget_move_data['to'];

				global $wp_registered_sidebars;

				if ( preg_match( '/^sidebar-/', $from_sidebar ) ) {
					$from_sidebar = isset( $wp_registered_sidebars[ $from_sidebar ] )
					? $wp_registered_sidebars[ $from_sidebar ]['name']
					: $from_sidebar;
				}

				if ( preg_match( '/^sidebar-/', $to_sidebar ) ) {
					$to_sidebar = isset( $wp_registered_sidebars[ $to_sidebar ] )
					? $wp_registered_sidebars[ $to_sidebar ]['name']
					: $to_sidebar;
				}

				Alert_Manager::trigger_event(
					2045,
					array(
						'WidgetName' => \sanitize_text_field( \wp_unslash( $widget_name ) ),
						'OldSidebar' => \sanitize_text_field( \wp_unslash( $from_sidebar ) ),
						'NewSidebar' => \sanitize_text_field( \wp_unslash( $to_sidebar ) ),
					)
				);
			}
		}

		/**
		 * Widgets Activity (added, modified, deleted).
		 *
		 * @since 4.5.0
		 */
		public static function event_widget_activity() {
			// Filter $_POST array for security.
			$post_array = filter_input_array( INPUT_POST );

			if ( ! isset( $post_array ) || ! isset( $post_array['widget-id'] ) || empty( $post_array['widget-id'] ) ) {
				return;
			}

			if ( ! isset( $post_array['savewidgets'] ) || false === check_ajax_referer( 'save-sidebar-widgets', 'savewidgets', false ) ) {
				return;
			}

			global $wp_registered_sidebars;
			$can_check_sidebar = ! empty( $wp_registered_sidebars );

			switch ( true ) {
				// Added widget.
				case isset( $post_array['add_new'] ) && 'multi' === $post_array['add_new']:
					$sidebar = isset( $post_array['sidebar'] ) ? \sanitize_text_field( \wp_unslash( $post_array['sidebar'] ) ) : null;
					if ( $can_check_sidebar && preg_match( '/^sidebar-/', $sidebar ) ) {
						$sidebar = $wp_registered_sidebars[ $sidebar ]['name'];
					}
					Alert_Manager::trigger_event(
						2042,
						array(
							'WidgetName' => \sanitize_text_field( \wp_unslash( $post_array['id_base'] ) ),
							'Sidebar'    => \sanitize_text_field( \wp_unslash( $sidebar ) ),
						)
					);
					break;
				// Deleted widget.
				case isset( $post_array['delete_widget'] ) && 1 === intval( $post_array['delete_widget'] ):
					$sidebar = isset( $post_array['sidebar'] ) ? \sanitize_text_field( \wp_unslash( $post_array['sidebar'] ) ) : null;
					if ( $can_check_sidebar && preg_match( '/^sidebar-/', $sidebar ) ) {
						$sidebar = $wp_registered_sidebars[ $sidebar ]['name'];
					}
					Alert_Manager::trigger_event(
						2044,
						array(
							'WidgetName' => \sanitize_text_field( \wp_unslash( $post_array['id_base'] ) ),
							'Sidebar'    => \sanitize_text_field( \wp_unslash( $sidebar ) ),
						)
					);
					break;
				// Modified widget.
				case isset( $post_array['id_base'] ) && ! empty( $post_array['id_base'] ):
					$widget_id = 0;
					if ( ! empty( $post_array['multi_number'] ) ) {
						$widget_id = intval( $post_array['multi_number'] );
					} elseif ( ! empty( $post_array['widget_number'] ) ) {
						$widget_id = intval( $post_array['widget_number'] );
					}
					if ( empty( $widget_id ) ) {
						return;
					}

					$widget_name = \sanitize_text_field( \wp_unslash( $post_array['id_base'] ) );
					$sidebar     = isset( $post_array['sidebar'] ) ? \sanitize_text_field( \wp_unslash( $post_array['sidebar'] ) ) : null;
					$widget_data = isset( $post_array[ "widget-$widget_name" ][ $widget_id ] )
					? $post_array[ "widget-$widget_name" ][ $widget_id ]
					: null;

					if ( empty( $widget_data ) ) {
						return;
					}
					// Get info from db.
					$widget_db_data = get_option( 'widget_' . $widget_name );
					if ( empty( $widget_db_data[ $widget_id ] ) ) {
						return;
					}

					// Transform 'on' -> 1.
					foreach ( $widget_data as $k => $v ) {
						if ( 'on' === $v ) {
							$widget_data[ $k ] = 1;
						}
					}

					// Compare - checks for any changes inside widgets.
					$diff  = array_diff_assoc( $widget_data, $widget_db_data[ $widget_id ] );
					$count = count( $diff );
					if ( $count > 0 ) {
						if ( $can_check_sidebar && preg_match( '/^sidebar-/', $sidebar ) ) {
							$sidebar = $wp_registered_sidebars[ $sidebar ]['name'];
						}
						Alert_Manager::trigger_event(
							2043,
							array(
								'WidgetName' => \sanitize_text_field( \wp_unslash( $widget_name ) ),
								'Sidebar'    => \sanitize_text_field( \wp_unslash( $sidebar ) ),
							)
						);
					}
					break;
				default:
					// Fallback for any other cases would go here.
					break;
			}
		}
	}
}