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<?php |
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|
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namespace WPDeveloper\BetterDocs\FrontEnd; |
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|
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/** |
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* Extends WordPress search SQL on `docs` queries to also match docs whose |
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* assigned `doc_tag` or `doc_category` term names contain the search term. |
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* |
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* The filter is registered globally so it applies to every search query against |
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* the `docs` post type — including WP core's `GET /wp/v2/docs?search=...`, |
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* BetterDocs' `/betterdocs/v1/search`, and the shortcode/widget AJAX paths. |
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*/ |
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class SearchExtender { |
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public function __construct() { |
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add_filter( 'posts_search', [ $this, 'extend_search' ], 20, 2 ); |
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} |
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|
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/** |
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* Inject an OR clause that matches docs whose related taxonomy term names |
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* contain the search term. |
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* |
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* @param string $search The search SQL clause (already begins with " AND ("). |
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* @param \WP_Query $query The WP_Query instance. |
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* @return string Modified search SQL. |
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*/ |
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public function extend_search( $search, $query ) { |
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global $wpdb; |
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|
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if ( empty( $search ) ) { |
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return $search; |
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} |
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|
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$post_type = isset( $query->query_vars['post_type'] ) ? $query->query_vars['post_type'] : ''; |
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if ( is_array( $post_type ) ) { |
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if ( ! in_array( 'docs', $post_type, true ) ) { |
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return $search; |
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} |
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} elseif ( $post_type !== 'docs' ) { |
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return $search; |
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} |
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|
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$search_term = isset( $query->query_vars['s'] ) ? (string) $query->query_vars['s'] : ''; |
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if ( $search_term === '' ) { |
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return $search; |
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} |
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|
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$taxonomies = [ 'doc_tag', 'doc_category' ]; |
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$like = '%' . $wpdb->esc_like( $search_term ) . '%'; |
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|
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$placeholders = implode( ',', array_fill( 0, count( $taxonomies ), '%s' ) ); |
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$args = $taxonomies; |
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$args[] = $like; |
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|
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$subquery = $wpdb->prepare( |
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"{$wpdb->posts}.ID IN ( |
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SELECT DISTINCT tr.object_id |
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FROM {$wpdb->term_relationships} tr |
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INNER JOIN {$wpdb->term_taxonomy} tt ON tr.term_taxonomy_id = tt.term_taxonomy_id |
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INNER JOIN {$wpdb->terms} t ON tt.term_id = t.term_id |
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WHERE tt.taxonomy IN ({$placeholders}) AND t.name LIKE %s |
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)", |
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$args |
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); |
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|
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return preg_replace( '/^\s*AND\s*\(/', " AND ({$subquery} OR ", $search, 1 ); |
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} |
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} |
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|
