<?php
/**
 * Search Ordering Feature
 *
 * @package elasticpress
 */

namespace ElasticPress\Feature\SearchOrdering;

use ElasticPress\Feature;
use ElasticPress\FeatureRequirementsStatus as FeatureRequirementsStatus;
use ElasticPress\Features;
use ElasticPress\Indexable\Post\Post;
use ElasticPress\Indexables;
use ElasticPress\Utils;

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

/**
 * Search Ordering Feature
 *
 * @package ElasticPress\Feature\SearchOrdering
 */
class SearchOrdering extends Feature {

	/**
	 * Internal name of the post type
	 */
	const POST_TYPE_NAME = 'ep-pointer';

	/**
	 * Internal name of the taxonomy
	 */
	const TAXONOMY_NAME = 'ep_custom_result';

	/**
	 * Capability required to manage.
	 *
	 * This will be removed in future versions of ElasticPress. Please use `Utils\get_capability()` instead.
	 *
	 * @deprecated 4.5.0
	 */
	const CAPABILITY = 'elasticpress_manage';

	/**
	 * Initialize feature setting it's config
	 *
	 * @since  3.0
	 */
	public function __construct() {
		$this->slug = 'searchordering';

		$this->title = esc_html__( 'Custom Search Results', 'elasticpress' );

		$this->summary = __( 'Insert specific posts into search results for specific search queries.', 'elasticpress' );

		$this->docs_url = __( 'https://elasticpress.zendesk.com/hc/en-us/articles/360050447492-Configuring-ElasticPress-via-the-Plugin-Dashboard#custom-search-results', 'elasticpress' );

		$this->requires_install_reindex = false;

		parent::__construct();
	}

	/**
	 * Setup Feature Functionality
	 */
	public function setup() {
		/** Features Class @var Features $features */
		$features = Features::factory();

		/** Search Feature @var Feature\Search\Search $search */
		$search = $features->get_registered_feature( 'search' );

		if ( ! $search->is_active() && $this->is_active() ) {
			$features->deactivate_feature( $this->slug );
			return false;
		}

		add_action( 'admin_menu', [ $this, 'admin_menu' ], 50 );
		add_filter( 'parent_file', [ $this, 'parent_file' ], 50 );
		add_filter( 'submenu_file', [ $this, 'submenu_file' ], 50 );
		add_action( 'init', [ $this, 'register_post_type' ] );
		add_action( 'admin_enqueue_scripts', [ $this, 'admin_enqueue_scripts' ] );
		add_action( 'save_post_' . self::POST_TYPE_NAME, [ $this, 'save_post' ], 10, 2 );
		add_action( 'posts_results', [ $this, 'posts_results' ], 20, 2 );  // Runs after core ES is done
		add_action( 'rest_api_init', [ $this, 'rest_api_init' ] );
		add_filter( 'ep_sync_taxonomies', [ $this, 'filter_sync_taxonomies' ] );
		add_filter( 'ep_weighting_fields_for_post_type', [ $this, 'weighting_fields_for_post_type' ], 1, 2 );
		add_filter( 'ep_weighting_configuration_for_search', [ $this, 'filter_weighting_configuration' ], 10, 2 );
		add_filter( 'ep_weighting_configuration_for_autosuggest', [ $this, 'filter_weighting_configuration' ], 10, 1 );
		add_filter( 'ep_weighting_configuration_defaults_for_autosuggest', [ $this, 'filter_weighting_configuration' ], 10, 1 );
		add_filter( 'ep_weighting_default_post_type_weights', [ $this, 'filter_default_post_type_weights' ], 10, 2 );
		add_filter( 'enter_title_here', [ $this, 'filter_enter_title_here' ] );
		add_filter( 'manage_' . self::POST_TYPE_NAME . '_posts_columns', [ $this, 'filter_column_names' ] );
		add_filter( 'post_updated_messages', [ $this, 'filter_updated_messages' ] );
		add_filter( 'admin_title', [ $this, 'update_page_title' ], 10, 2 );

		// Deals with trashing/untrashing/deleting
		add_action( 'wp_trash_post', [ $this, 'handle_post_trash' ] );
		add_action( 'before_delete_post', [ $this, 'handle_post_trash' ] );
		add_action( 'untrashed_post', [ $this, 'handle_post_untrash' ] );
		add_filter( 'post_row_actions', [ $this, 'remove_quick_edit' ], 10, 2 );
		add_filter( 'bulk_actions-edit-' . self::POST_TYPE_NAME, [ $this, 'remove_bulk_edit' ] );
	}

	/**
	 * Remove bulk edit
	 *
	 * @param array $actions Bulk actions
	 * @since 3.5
	 * @return array
	 */
	public function remove_bulk_edit( $actions ) {
		unset( $actions['edit'] );
		return $actions;
	}

	/**
	 * Remove quick edit for post type
	 *
	 * @param array   $actions Current table row actions
	 * @param WP_Post $post Current post
	 * @since 3.5
	 * @return array
	 */
	public function remove_quick_edit( $actions, $post ) {
		if ( self::POST_TYPE_NAME === $post->post_type ) {
			// Remove "Quick Edit"
			unset( $actions['inline hide-if-no-js'] );
		}
		return $actions;
	}

	/**
	 * Add updated messages for post type
	 *
	 * @param  array $messages Messages array
	 * @since  3.2
	 * @return array
	 */
	public function filter_updated_messages( $messages ) {
		$post             = get_post();
		$post_type        = get_post_type( $post );
		$post_type_object = get_post_type_object( $post_type );

		$messages[ self::POST_TYPE_NAME ] = array(
			0  => '',
			1  => esc_html__( 'Custom result updated.', 'elasticpress' ),
			2  => esc_html__( 'Custom field updated.', 'elasticpress' ),
			3  => esc_html__( 'Custom field deleted.', 'elasticpress' ),
			4  => esc_html__( 'Custom result updated.', 'elasticpress' ),
			/* translators: %s: date and time of the revision */
			5  => isset( $_GET['revision'] ) ? sprintf( __( 'Custom result restored to revision from %s', 'elasticpress' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false, // phpcs:ignore WordPress.Security.NonceVerification
			6  => esc_html__( 'Custom result published.', 'elasticpress' ),
			7  => esc_html__( 'Custom result saved.', 'elasticpress' ),
			8  => esc_html__( 'Custom result submitted.', 'elasticpress' ),
			9  => sprintf(
				// translators: Scheduled date.
				esc_html__( 'Custom result scheduled for: %1$s.', 'elasticpress' ),
				// translators: Publish box date format, see https://php.net/date
				date_i18n( esc_html__( 'M j, Y @ G:i', 'elasticpress' ), strtotime( $post->post_date ) )
			),
			10 => esc_html__( 'Custom result draft updated.', 'elasticpress' ),
		);

		return $messages;
	}

	/**
	 * Returns requirements status of feature
	 *
	 * Requires the search feature to be activated
	 *
	 * @return FeatureRequirementsStatus
	 */
	public function requirements_status() {
		/** Features Class @var Features $features */
		$features = Features::factory();

		/** Search Feature @var Feature\Search\Search $search */
		$search = $features->get_registered_feature( 'search' );

		if ( ! $search->is_active() ) {
			return new FeatureRequirementsStatus( 2, esc_html__( 'This feature requires the "Post Search" feature to be enabled', 'elasticpress' ) );
		}

		return parent::requirements_status();
	}

	/**
	 * Output feature box long
	 */
	public function output_feature_box_long() {
		?>
		<p><?php esc_html_e( 'Selected posts will be inserted into search results in the specified position.', 'elasticpress' ); ?></p>
		<?php
	}

	/**
	 * Adds this taxonomy as one of the taxonomies to index
	 *
	 * @param array $taxonomies Current indexable taxonomies
	 *
	 * @return array
	 */
	public function filter_sync_taxonomies( $taxonomies ) {
		$taxonomies[ self::TAXONOMY_NAME ] = get_taxonomy( self::TAXONOMY_NAME );

		return $taxonomies;
	}

	/**
	 * Adds the search ordering to the admin menu
	 */
	public function admin_menu() {
		add_submenu_page(
			'elasticpress',
			esc_html__( 'Custom Results', 'elasticpress' ),
			esc_html__( 'Custom Results', 'elasticpress' ),
			Utils\get_capability(),
			'edit.php?post_type=' . self::POST_TYPE_NAME
		);
	}

	/**
	 * Sets the parent menu item for the post type submenu
	 *
	 * @param string $parent_file Current parent menu item
	 *
	 * @return string
	 */
	public function parent_file( $parent_file ) {
		global $current_screen;

		if ( defined( 'EP_IS_NETWORK' ) && EP_IS_NETWORK ) {
			return $parent_file;
		}

		// Set correct active/current menu and submenu in the WordPress Admin menu for the "pointer" CPT Add-New/Edit/List
		if ( self::POST_TYPE_NAME === $current_screen->post_type ) {
			$parent_file = 'elasticpress';
		}

		return $parent_file;
	}

	/**
	 * Ensures the correct item is highlighted when adding a new post
	 *
	 * @param string $submenu_file Current parent menu item
	 *
	 * @return string
	 */
	public function submenu_file( $submenu_file ) {
		global $current_screen;

		if ( defined( 'EP_IS_NETWORK' ) && EP_IS_NETWORK ) {
			return $submenu_file;
		}

		// Set correct active/current menu and submenu in the WordPress Admin menu for the "pointer" CPT Add-New/Edit/List
		if ( self::POST_TYPE_NAME === $current_screen->post_type ) {
			$submenu_file = 'edit.php?post_type=' . self::POST_TYPE_NAME;
		}

		return $submenu_file;
	}

	/**
	 * Registers the pointer post type for the injected results
	 */
	public function register_post_type() {
		$is_network = defined( 'EP_IS_NETWORK' ) && EP_IS_NETWORK;
		$menu       = $is_network ? null : false;

		$labels = array(
			'name'               => esc_html_x( 'Custom Search Results', 'post type general name', 'elasticpress' ),
			'singular_name'      => esc_html_x( 'Custom Search Result', 'post type singular name', 'elasticpress' ),
			'menu_name'          => esc_html_x( 'Custom Search Results', 'admin menu', 'elasticpress' ),
			'name_admin_bar'     => esc_html_x( 'Custom Search Result', 'add new on admin bar', 'elasticpress' ),
			'add_new'            => esc_html_x( 'Add New', 'book', 'elasticpress' ),
			'add_new_item'       => esc_html__( 'Add New Custom Search Result', 'elasticpress' ),
			'new_item'           => esc_html__( 'New Custom Search Result', 'elasticpress' ),
			'edit_item'          => esc_html__( 'Edit Custom Search Result', 'elasticpress' ),
			'view_item'          => esc_html__( 'View Custom Search Result', 'elasticpress' ),
			'all_items'          => esc_html__( 'All Custom Search Results', 'elasticpress' ),
			'search_items'       => esc_html__( 'Search Custom Search Results', 'elasticpress' ),
			'parent_item_colon'  => esc_html__( 'Parent Custom Search Result:', 'elasticpress' ),
			'not_found'          => esc_html__( 'No results found.', 'elasticpress' ),
			'not_found_in_trash' => esc_html__( 'No results found in Trash.', 'elasticpress' ),
		);

		$args = array(
			'labels'               => $labels,
			'description'          => esc_html__( 'Posts to inject into search results', 'elasticpress' ),
			'public'               => false,
			'publicly_queryable'   => false,
			'show_ui'              => true,
			'show_in_menu'         => $menu,
			'query_var'            => true,
			'rewrite'              => array( 'slug' => 'ep-pointer' ),
			'capabilities'         => Utils\get_post_map_capabilities(),
			'has_archive'          => false,
			'hierarchical'         => false,
			'menu_position'        => 100,
			'supports'             => [ 'title' ],
			'register_meta_box_cb' => [ $this, 'register_meta_box' ],
			'menu_icon'            => 'data:image/svg+xml;base64,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',
		);

		register_post_type( self::POST_TYPE_NAME, $args );

		// Register taxonomy
		$labels = array(
			'name'              => esc_html_x( 'Custom Results', 'taxonomy general name', 'elasticpress' ),
			'singular_name'     => esc_html_x( 'Custom Result', 'taxonomy singular name', 'elasticpress' ),
			'search_items'      => esc_html__( 'Search Custom Results', 'elasticpress' ),
			'all_items'         => esc_html__( 'All Custom Results', 'elasticpress' ),
			'parent_item'       => esc_html__( 'Parent Custom Result', 'elasticpress' ),
			'parent_item_colon' => esc_html__( 'Parent Custom Result:', 'elasticpress' ),
			'edit_item'         => esc_html__( 'Edit Custom Result', 'elasticpress' ),
			'update_item'       => esc_html__( 'Update Custom Result', 'elasticpress' ),
			'add_new_item'      => esc_html__( 'Add New Custom Result', 'elasticpress' ),
			'new_item_name'     => esc_html__( 'New Custom Result Name', 'elasticpress' ),
			'menu_name'         => esc_html__( 'Custom Results', 'elasticpress' ),
		);

		$args = array(
			'hierarchical'      => false,
			'labels'            => $labels,
			'show_ui'           => false,
			'show_admin_column' => false,
			'query_var'         => false,
			'rewrite'           => false,
		);

		/** Features Class @var Features $features */
		$features = Features::factory();

		/** Search Feature @var Feature\Search\Search $search */
		$search = $features->get_registered_feature( 'search' );

		$post_types = $search->get_searchable_post_types();

		register_taxonomy( 'ep_custom_result', $post_types, $args );
	}

	/**
	 * Registers meta box for the search pointers
	 */
	public function register_meta_box() {
		add_meta_box( 'ep-ordering', esc_html__( 'Manage Results', 'elasticpress' ), [ $this, 'render_meta_box' ], self::POST_TYPE_NAME, 'normal' );
	}

	/**
	 * Renders the meta box for the injected search results
	 *
	 * @param \WP_Post $post Current post object
	 */
	public function render_meta_box( $post ) {
		?>
		<div id="ordering-app"></div>
		<?php
	}

	/**
	 * Sends initial pointer data to the frontend to reduce API requests required
	 *
	 * @return array
	 */
	public function get_pointer_data_for_localize() {
		$post_id = get_the_ID();

		$pointers = get_post_meta( $post_id, 'pointers', true );

		if ( empty( $pointers ) ) {
			return [
				'pointers' => [],
				'posts'    => [],
			];
		}

		$post_ids = wp_list_pluck( $pointers, 'ID' );

		$query = new \WP_Query(
			[
				'post_type' => 'any',
				'post__in'  => $post_ids,
				'count'     => count( $post_ids ),
				'orderby'   => 'post__in',
			]
		);

		$final_posts       = [];
		$filtered_pointers = [];

		foreach ( $query->posts as $post ) {
			$final_posts[ $post->ID ] = $post;
			// Add the post to filtered array. By doing this, we removed the posts that don't exist anymore.
			$filtered_pointers[] = $pointers[ array_search( $post->ID, $post_ids, true ) ];
		}

		return [
			'pointers' => $filtered_pointers,
			'posts'    => $final_posts,
		];
	}

	/**
	 * Enqueues scripts for admin interface
	 */
	public function admin_enqueue_scripts() {
		global $pagenow; // post-new.php or post.php

		$screen = get_current_screen();

		if ( in_array( $pagenow, [ 'post-new.php', 'post.php' ], true ) && $screen instanceof \WP_Screen && self::POST_TYPE_NAME === $screen->post_type ) {
			wp_enqueue_script(
				'ep_ordering_scripts',
				EP_URL . 'dist/js/ordering-script.js',
				Utils\get_asset_info( 'ordering-script', 'dependencies' ),
				Utils\get_asset_info( 'ordering-script', 'version' ),
				true
			);

			wp_set_script_translations( 'ep_ordering_scripts', 'elasticpress' );

			wp_enqueue_style(
				'ep_ordering_styles',
				EP_URL . 'dist/css/ordering-styles.css',
				Utils\get_asset_info( 'ordering-styles', 'dependencies' ),
				Utils\get_asset_info( 'ordering-styles', 'version' )
			);

			$pointer_data = $this->get_pointer_data_for_localize();

			wp_localize_script(
				'ep_ordering_scripts',
				'epOrdering',
				array_merge(
					[
						'searchEndpoint' => rest_url( 'elasticpress/v1/pointer_search' ),
						'nonce'          => wp_create_nonce( 'save-search-ordering' ),
						'restApiRoot'    => rest_url( '/' ),
						'postsPerPage'   => (int) get_option( 'posts_per_page', 10 ),
					],
					$pointer_data
				)
			);
		}
	}

	/**
	 * Handles saving the injected post settings
	 *
	 * @param int      $post_id Post ID of the post being saved
	 * @param \WP_Post $post    Post object being saved
	 */
	public function save_post( $post_id, $post ) {
		/** Post Indexable @var Post $post_indexable */
		$post_indexable = Indexables::factory()->get( 'post' );

		if ( ! isset( $_POST['search-ordering-nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['search-ordering-nonce'] ), 'save-search-ordering' ) ) {
			return;
		}

		if ( ! current_user_can( 'edit_post', $post_id ) ) {
			return;
		}

		$final_order_data = [];

		// Track the old IDs that aren't retained so we can delete the terms later
		$previous_order_data = get_post_meta( $post_id, 'pointers', true );
		$previous_post_ids   = ! empty( $previous_order_data ) ? array_flip( wp_list_pluck( $previous_order_data, 'ID' ) ) : [];

		$ordered_posts = isset( $_POST['ordered_posts'] ) ? wp_unslash( $_POST['ordered_posts'] ) : ''; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$ordered_posts = json_decode( $ordered_posts, true );

		$posts_per_page = (int) get_option( 'posts_per_page', 10 );

		$old_search_term = get_post_meta( $post->ID, 'search_term', true );

		// Search term changed, so remove it from all of the posts it was assigned to
		if ( ! empty( $old_search_term ) && $old_search_term !== $post->post_title ) {
			$old_term = $this->create_or_return_custom_result_term( $old_search_term );

			foreach ( array_flip( $previous_post_ids ) as $previous_post_id ) {
				wp_remove_object_terms( $previous_post_id, $old_term->term_id, self::TAXONOMY_NAME );
				$post_indexable->sync_manager->action_sync_on_update( $previous_post_id );
			}
		}

		foreach ( $ordered_posts as $order_data ) {
			if ( intval( $order_data['order'] ) <= $posts_per_page ) {
				$final_order_data[] = [
					'ID'    => intval( $order_data['ID'] ),
					'order' => intval( $order_data['order'] ),
				];
			} else {
				$previous_post_ids[ intval( $order_data['ID'] ) ] = true;
			}

			// If the post is still assigned, no need to delete the terms later
			if ( isset( $previous_post_ids[ $order_data['ID'] ] ) ) {
				unset( $previous_post_ids[ $order_data['ID'] ] );
			}
		}

		$custom_result_term = $this->create_or_return_custom_result_term( $post->post_title );
		if ( $custom_result_term ) {
			foreach ( $final_order_data as $final_order_datum ) {

				if ( 'publish' === $post->post_status ) {
					$this->assign_term_to_post( $final_order_datum['ID'], $custom_result_term->term_taxonomy_id, $final_order_datum['order'] );
				} else {
					// If not published, we need to ensure that the term is _not_ present on the target posts
					wp_remove_object_terms( $final_order_datum['ID'], (int) $custom_result_term->term_id, self::TAXONOMY_NAME );
				}

				$post_indexable->sync_manager->action_sync_on_update( $final_order_datum['ID'] );
			}
		}

		// Remove terms for any that were deleted
		if ( ! empty( $previous_post_ids ) ) {
			foreach ( array_flip( $previous_post_ids ) as $old_post_id ) {
				wp_remove_object_terms( $old_post_id, (int) $custom_result_term->term_id, self::TAXONOMY_NAME );

				$post_indexable->sync_manager->action_sync_on_update( $old_post_id );
			}
		}

		update_post_meta( $post_id, 'pointers', $final_order_data );
		update_post_meta( $post_id, 'search_term', $post->post_title );
	}

	/**
	 * Creates a term in the taxonomy for tracking ordered results or returns the existing term
	 *
	 * @param string $term_name Term name to fetch or create
	 *
	 * @return false|\WP_Term
	 */
	public function create_or_return_custom_result_term( $term_name ) {
		$term = get_term_by( 'name', $term_name, self::TAXONOMY_NAME );

		if ( ! $term ) {
			$term_ids = wp_insert_term( $term_name, self::TAXONOMY_NAME );

			if ( is_wp_error( $term_ids ) ) {
				return false;
			}

			$term = get_term( $term_ids['term_id'], self::TAXONOMY_NAME );
		}

		return $term;
	}

	/**
	 * Filters available fields for weighting to exclude the custom results taxonomy
	 *
	 * @param array  $fields    Current weightable fields
	 * @param string $post_type Current post type
	 *
	 * @return array Final weightable fields
	 */
	public function weighting_fields_for_post_type( $fields, $post_type ) {
		if ( isset( $fields['taxonomies'] ) && isset( $fields['taxonomies']['children'] ) && isset( $fields['taxonomies']['children'][ 'terms.' . self::TAXONOMY_NAME . '.name' ] ) ) {
			unset( $fields['taxonomies']['children'][ 'terms.' . self::TAXONOMY_NAME . '.name' ] );
		}

		return $fields;
	}

	/**
	 * Filters the weighting configuration to insert our weighting config when we're searching
	 *
	 * @param array $weighting_configuration Current weighting configuration
	 * @param array $args                    WP Query Args
	 *
	 * @return array Final weighting configuration
	 */
	public function filter_weighting_configuration( $weighting_configuration, $args = array() ) {
		if ( ! isset( $args['exclude_pointers'] ) || true !== $args['exclude_pointers'] ) {
			foreach ( $weighting_configuration as $post_type => $config ) {
				$weighting_configuration[ $post_type ]['terms.ep_custom_result.name'] = [
					'enabled'   => true,
					'weight'    => 9999,
					'fuzziness' => false,
				];
			}
		}

		return $weighting_configuration;
	}

	/**
	 * Filters default weights for server side searches
	 *
	 * @param array  $post_type_defaults Current default weight settings
	 * @param string $post_type          Post type
	 *
	 * @return array Final weight settings
	 */
	public function filter_default_post_type_weights( $post_type_defaults, $post_type ) {
		$post_type_defaults['terms.ep_custom_result.name'] = [
			'enabled'   => true,
			'weight'    => 9999,
			'fuzziness' => false,
		];

		return $post_type_defaults;
	}

	/**
	 * Changes the title to show "Enter Search Query" on the CPT edit screen
	 *
	 * @param string $text Current text for the input label
	 *
	 * @return string Final label
	 */
	public function filter_enter_title_here( $text ) {
		if ( self::POST_TYPE_NAME === get_post_type() ) {
			$text = esc_html__( 'Enter Search Query', 'elasticpress' );
		}

		return $text;
	}

	/**
	 * Filters the title column to show "Search Query"
	 *
	 * @param array $columns Current columns
	 *
	 * @return array Final Columns
	 */
	public function filter_column_names( $columns ) {
		$columns['title'] = esc_html__( 'Search Query', 'elasticpress' );

		return $columns;
	}

	/**
	 * Finds and pointer post types in the result set and replaces them with the posts to be injected in the proper positions
	 *
	 * @param array     $posts Current array of post results
	 * @param \WP_Query $query The current query
	 *
	 * @return array Final modified posts array
	 */
	public function posts_results( $posts, $query ) {
		if ( is_array( $posts ) && $query->is_search() ) {
			$search_query = strtolower( $query->get( 's' ) );

			$to_inject = array();

			foreach ( $posts as $key => &$post ) {
				if ( isset( $post->terms ) && isset( $post->terms[ self::TAXONOMY_NAME ] ) ) {
					foreach ( $post->terms[ self::TAXONOMY_NAME ] as $current_term ) {
						if ( strtolower( $current_term['name'] ) === $search_query ) {
							$to_inject[ $current_term['term_order'] ] = $post;

							unset( $posts[ $key ] );

							break;
						}
					}
				}
			}

			// Remove the null values
			$posts = array_filter( $posts );

			// Sort by key so they get injected in order and remain in the proper positions
			ksort( $to_inject );

			if ( ! empty( $to_inject ) ) {
				foreach ( $to_inject as $position => $newpost ) {
					array_splice( $posts, $position - 1, 0, array( $newpost ) );
				}
			}

			// reindex just in case we got out of order keys
			$posts = array_values( $posts );
		}

		return $posts;
	}

	/**
	 * Registers the API endpoint for searching from the admin interface
	 */
	public function rest_api_init() {
		register_rest_route(
			'elasticpress/v1',
			'pointer_search',
			[
				'methods'             => 'GET',
				'callback'            => [ $this, 'handle_pointer_search' ],
				'permission_callback' => function() {
					return current_user_can( Utils\get_capability() );
				},
				'args'                => [
					's' => [
						'validate_callback' => function ( $param ) {
							return ! empty( $param );
						},
						'required'          => true,
					],
				],
			]
		);

		register_rest_route(
			'elasticpress/v1',
			'pointer_preview',
			[
				'methods'             => 'GET',
				'callback'            => [ $this, 'handle_pointer_preview' ],
				'permission_callback' => function() {
					return current_user_can( Utils\get_capability() );
				},
				'args'                => [
					's' => [
						'validate_callback' => function ( $param ) {
							return ! empty( $param );
						},
						'required'          => true,
					],
				],
			]
		);
	}

	/**
	 * Handles the search for posts from the admin interface for the post type
	 *
	 * @param \WP_REST_Request $request Rest request
	 *
	 * @return array
	 */
	public function handle_pointer_search( $request ) {
		$search = $request->get_param( 's' );

		/** Features Class @var Features $features */
		$features = Features::factory();

		/** Search Feature @var Feature\Search\Search $search */
		$search_feature = $features->get_registered_feature( 'search' );

		$post_types = $search_feature->get_searchable_post_types();

		$query = new \WP_Query(
			[
				'post_type'   => $post_types,
				'post_status' => 'publish',
				's'           => $search,
			]
		);

		return $query->posts;
	}

	/**
	 * Handles the search preview on the pointer edit screen
	 *
	 * @param \WP_REST_Request $request Rest request
	 *
	 * @return array
	 */
	public function handle_pointer_preview( $request ) {
		remove_filter( 'ep_searchable_post_types', [ $this, 'searchable_post_types' ] );

		$search = $request->get_param( 's' );

		$query = new \WP_Query(
			[
				's'                => $search,
				'exclude_pointers' => true,
			]
		);

		add_filter( 'ep_searchable_post_types', [ $this, 'searchable_post_types' ] );

		return $query->posts;
	}

	/**
	 * Removes taxonomy terms from the references posts when a pointer is deleted or trashed
	 *
	 * @param int $post_id Post ID that is being deleted
	 */
	public function handle_post_trash( $post_id ) {
		$post = get_post( $post_id );

		if ( self::POST_TYPE_NAME !== $post->post_type ) {
			return;
		}

		/** Post Indexable @var Post $post_indexable */
		$post_indexable = Indexables::factory()->get( 'post' );

		$pointers = get_post_meta( $post_id, 'pointers', true );
		$term     = $this->create_or_return_custom_result_term( $post->post_title );

		if ( empty( $pointers ) ) {
			return;
		}

		foreach ( $pointers as $pointer ) {
			$ref_id = $pointer['ID'];
			wp_remove_object_terms( $ref_id, (int) $term->term_id, self::TAXONOMY_NAME );

			$post_indexable->sync_manager->action_sync_on_update( $ref_id );
		}
	}

	/**
	 * Handles reassigning terms to the posts when a pointer post is restored from trash
	 *
	 * @param int $post_id Post ID
	 */
	public function handle_post_untrash( $post_id ) {
		$post = get_post( $post_id );

		if ( self::POST_TYPE_NAME !== $post->post_type ) {
			return;
		}

		/** Post Indexable @var Post $post_indexable */
		$post_indexable = Indexables::factory()->get( 'post' );

		$pointers = get_post_meta( $post_id, 'pointers', true );
		$term     = $this->create_or_return_custom_result_term( $post->post_title );

		if ( 'publish' === $post->post_status ) {
			foreach ( $pointers as $pointer ) {
				$this->assign_term_to_post( $pointer['ID'], $term->term_taxonomy_id, $pointer['order'] );

				$post_indexable->sync_manager->action_sync_on_update( $pointer['ID'] );
			}
		}
	}

	/**
	 * Assigns the term to the post with the proper term_order value
	 *
	 * @param int $post_id          The Post ID
	 * @param int $term_taxonomy_id Term Taxonomy ID
	 * @param int $order            Term order to assign
	 *
	 * @return bool|int
	 */
	protected function assign_term_to_post( $post_id, $term_taxonomy_id, $order ) {
		global $wpdb;

		$result = $wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
			$wpdb->prepare(
				"INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES ( %d, %d, %d ) ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)",
				$post_id,
				$term_taxonomy_id,
				$order
			)
		);

		// Delete the term order cache
		wp_cache_delete( "{$post_id}_term_order" );

		// Clears the core cache
		wp_cache_delete( $post_id, self::TAXONOMY_NAME . '_relationships' );

		return $result;
	}

	/**
	 * Update the page title to keep the consistency through the plugin
	 *
	 * @param string $admin_title The page title, with extra context added
	 * @param string $title The original page title
	 *
	 * @return string Updated the page title
	 */
	public function update_page_title( $admin_title, $title ) {
		if ( $this->title === $title ) {
			return __( 'ElasticPress Custom Search Results', 'elasticpress' );
		}

		return $admin_title;
	}

}