diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/class-wp-term-query.php --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wp/wp-includes/class-wp-term-query.php Mon Oct 14 17:39:30 2019 +0200 @@ -0,0 +1,996 @@ + '', + 'from' => '', + 'where' => array(), + 'orderby' => '', + 'limits' => '', + ); + + /** + * Query vars set by the user. + * + * @since 4.6.0 + * @var array + */ + public $query_vars; + + /** + * Default values for query vars. + * + * @since 4.6.0 + * @var array + */ + public $query_var_defaults; + + /** + * List of terms located by the query. + * + * @since 4.6.0 + * @var array + */ + public $terms; + + /** + * Constructor. + * + * Sets up the term query, based on the query vars passed. + * + * @since 4.6.0 + * @since 4.6.0 Introduced 'term_taxonomy_id' parameter. + * @since 4.7.0 Introduced 'object_ids' parameter. + * @since 4.9.0 Added 'slug__in' support for 'orderby'. + * + * @param string|array $query { + * Optional. Array or query string of term query parameters. Default empty. + * + * @type string|array $taxonomy Taxonomy name, or array of taxonomies, to which results should + * be limited. + * @type int|array $object_ids Optional. Object ID, or array of object IDs. Results will be + * limited to terms associated with these objects. + * @type string $orderby Field(s) to order terms by. Accepts term fields ('name', + * 'slug', 'term_group', 'term_id', 'id', 'description', 'parent'), + * 'count' for term taxonomy count, 'include' to match the + * 'order' of the $include param, 'slug__in' to match the + * 'order' of the $slug param, 'meta_value', 'meta_value_num', + * the value of `$meta_key`, the array keys of `$meta_query`, or + * 'none' to omit the ORDER BY clause. Defaults to 'name'. + * @type string $order Whether to order terms in ascending or descending order. + * Accepts 'ASC' (ascending) or 'DESC' (descending). + * Default 'ASC'. + * @type bool|int $hide_empty Whether to hide terms not assigned to any posts. Accepts + * 1|true or 0|false. Default 1|true. + * @type array|string $include Array or comma/space-separated string of term ids to include. + * Default empty array. + * @type array|string $exclude Array or comma/space-separated string of term ids to exclude. + * If $include is non-empty, $exclude is ignored. + * Default empty array. + * @type array|string $exclude_tree Array or comma/space-separated string of term ids to exclude + * along with all of their descendant terms. If $include is + * non-empty, $exclude_tree is ignored. Default empty array. + * @type int|string $number Maximum number of terms to return. Accepts ''|0 (all) or any + * positive number. Default ''|0 (all). Note that $number may + * not return accurate results when coupled with $object_ids. + * See #41796 for details. + * @type int $offset The number by which to offset the terms query. Default empty. + * @type string $fields Term fields to query for. Accepts 'all' (returns an array of + * complete term objects), 'all_with_object_id' (returns an + * array of term objects with the 'object_id' param; only works + * when the `$fields` parameter is 'object_ids' ), 'ids' + * (returns an array of ids), 'tt_ids' (returns an array of + * term taxonomy ids), 'id=>parent' (returns an associative + * array with ids as keys, parent term IDs as values), 'names' + * (returns an array of term names), 'count' (returns the number + * of matching terms), 'id=>name' (returns an associative array + * with ids as keys, term names as values), or 'id=>slug' + * (returns an associative array with ids as keys, term slugs + * as values). Default 'all'. + * @type bool $count Whether to return a term count (true) or array of term objects + * (false). Will take precedence over `$fields` if true. + * Default false. + * @type string|array $name Optional. Name or array of names to return term(s) for. + * Default empty. + * @type string|array $slug Optional. Slug or array of slugs to return term(s) for. + * Default empty. + * @type int|array $term_taxonomy_id Optional. Term taxonomy ID, or array of term taxonomy IDs, + * to match when querying terms. + * @type bool $hierarchical Whether to include terms that have non-empty descendants (even + * if $hide_empty is set to true). Default true. + * @type string $search Search criteria to match terms. Will be SQL-formatted with + * wildcards before and after. Default empty. + * @type string $name__like Retrieve terms with criteria by which a term is LIKE + * `$name__like`. Default empty. + * @type string $description__like Retrieve terms where the description is LIKE + * `$description__like`. Default empty. + * @type bool $pad_counts Whether to pad the quantity of a term's children in the + * quantity of each term's "count" object variable. + * Default false. + * @type string $get Whether to return terms regardless of ancestry or whether the + * terms are empty. Accepts 'all' or empty (disabled). + * Default empty. + * @type int $child_of Term ID to retrieve child terms of. If multiple taxonomies + * are passed, $child_of is ignored. Default 0. + * @type int|string $parent Parent term ID to retrieve direct-child terms of. + * Default empty. + * @type bool $childless True to limit results to terms that have no children. + * This parameter has no effect on non-hierarchical taxonomies. + * Default false. + * @type string $cache_domain Unique cache key to be produced when this query is stored in + * an object cache. Default is 'core'. + * @type bool $update_term_meta_cache Whether to prime meta caches for matched terms. Default true. + * @type array $meta_query Optional. Meta query clauses to limit retrieved terms by. + * See `WP_Meta_Query`. Default empty. + * @type string $meta_key Limit terms to those matching a specific metadata key. + * Can be used in conjunction with `$meta_value`. Default empty. + * @type string $meta_value Limit terms to those matching a specific metadata value. + * Usually used in conjunction with `$meta_key`. Default empty. + * @type string $meta_type Type of object metadata is for (e.g., comment, post, or user). + * Default empty. + * @type string $meta_compare Comparison operator to test the 'meta_value'. Default empty. + * } + */ + public function __construct( $query = '' ) { + $this->query_var_defaults = array( + 'taxonomy' => null, + 'object_ids' => null, + 'orderby' => 'name', + 'order' => 'ASC', + 'hide_empty' => true, + 'include' => array(), + 'exclude' => array(), + 'exclude_tree' => array(), + 'number' => '', + 'offset' => '', + 'fields' => 'all', + 'count' => false, + 'name' => '', + 'slug' => '', + 'term_taxonomy_id' => '', + 'hierarchical' => true, + 'search' => '', + 'name__like' => '', + 'description__like' => '', + 'pad_counts' => false, + 'get' => '', + 'child_of' => 0, + 'parent' => '', + 'childless' => false, + 'cache_domain' => 'core', + 'update_term_meta_cache' => true, + 'meta_query' => '', + 'meta_key' => '', + 'meta_value' => '', + 'meta_type' => '', + 'meta_compare' => '', + ); + + if ( ! empty( $query ) ) { + $this->query( $query ); + } + } + + /** + * Parse arguments passed to the term query with default query parameters. + * + * @since 4.6.0 + * + * @param string|array $query WP_Term_Query arguments. See WP_Term_Query::__construct() + */ + public function parse_query( $query = '' ) { + if ( empty( $query ) ) { + $query = $this->query_vars; + } + + $taxonomies = isset( $query['taxonomy'] ) ? (array) $query['taxonomy'] : null; + + /** + * Filters the terms query default arguments. + * + * Use {@see 'get_terms_args'} to filter the passed arguments. + * + * @since 4.4.0 + * + * @param array $defaults An array of default get_terms() arguments. + * @param array $taxonomies An array of taxonomies. + */ + $this->query_var_defaults = apply_filters( 'get_terms_defaults', $this->query_var_defaults, $taxonomies ); + + $query = wp_parse_args( $query, $this->query_var_defaults ); + + $query['number'] = absint( $query['number'] ); + $query['offset'] = absint( $query['offset'] ); + + // 'parent' overrides 'child_of'. + if ( 0 < intval( $query['parent'] ) ) { + $query['child_of'] = false; + } + + if ( 'all' == $query['get'] ) { + $query['childless'] = false; + $query['child_of'] = 0; + $query['hide_empty'] = 0; + $query['hierarchical'] = false; + $query['pad_counts'] = false; + } + + $query['taxonomy'] = $taxonomies; + + $this->query_vars = $query; + + /** + * Fires after term query vars have been parsed. + * + * @since 4.6.0 + * + * @param WP_Term_Query $this Current instance of WP_Term_Query. + */ + do_action( 'parse_term_query', $this ); + } + + /** + * Sets up the query for retrieving terms. + * + * @since 4.6.0 + * + * @param string|array $query Array or URL query string of parameters. + * @return array|int List of terms, or number of terms when 'count' is passed as a query var. + */ + public function query( $query ) { + $this->query_vars = wp_parse_args( $query ); + return $this->get_terms(); + } + + /** + * Get terms, based on query_vars. + * + * @since 4.6.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @return array List of terms. + */ + public function get_terms() { + global $wpdb; + + $this->parse_query( $this->query_vars ); + $args = &$this->query_vars; + + // Set up meta_query so it's available to 'pre_get_terms'. + $this->meta_query = new WP_Meta_Query(); + $this->meta_query->parse_query_vars( $args ); + + /** + * Fires before terms are retrieved. + * + * @since 4.6.0 + * + * @param WP_Term_Query $this Current instance of WP_Term_Query. + */ + do_action( 'pre_get_terms', $this ); + + $taxonomies = (array) $args['taxonomy']; + + // Save queries by not crawling the tree in the case of multiple taxes or a flat tax. + $has_hierarchical_tax = false; + if ( $taxonomies ) { + foreach ( $taxonomies as $_tax ) { + if ( is_taxonomy_hierarchical( $_tax ) ) { + $has_hierarchical_tax = true; + } + } + } + + if ( ! $has_hierarchical_tax ) { + $args['hierarchical'] = false; + $args['pad_counts'] = false; + } + + // 'parent' overrides 'child_of'. + if ( 0 < intval( $args['parent'] ) ) { + $args['child_of'] = false; + } + + if ( 'all' == $args['get'] ) { + $args['childless'] = false; + $args['child_of'] = 0; + $args['hide_empty'] = 0; + $args['hierarchical'] = false; + $args['pad_counts'] = false; + } + + /** + * Filters the terms query arguments. + * + * @since 3.1.0 + * + * @param array $args An array of get_terms() arguments. + * @param array $taxonomies An array of taxonomies. + */ + $args = apply_filters( 'get_terms_args', $args, $taxonomies ); + + // Avoid the query if the queried parent/child_of term has no descendants. + $child_of = $args['child_of']; + $parent = $args['parent']; + + if ( $child_of ) { + $_parent = $child_of; + } elseif ( $parent ) { + $_parent = $parent; + } else { + $_parent = false; + } + + if ( $_parent ) { + $in_hierarchy = false; + foreach ( $taxonomies as $_tax ) { + $hierarchy = _get_term_hierarchy( $_tax ); + + if ( isset( $hierarchy[ $_parent ] ) ) { + $in_hierarchy = true; + } + } + + if ( ! $in_hierarchy ) { + return array(); + } + } + + // 'term_order' is a legal sort order only when joining the relationship table. + $_orderby = $this->query_vars['orderby']; + if ( 'term_order' === $_orderby && empty( $this->query_vars['object_ids'] ) ) { + $_orderby = 'term_id'; + } + $orderby = $this->parse_orderby( $_orderby ); + + if ( $orderby ) { + $orderby = "ORDER BY $orderby"; + } + + $order = $this->parse_order( $this->query_vars['order'] ); + + if ( $taxonomies ) { + $this->sql_clauses['where']['taxonomy'] = "tt.taxonomy IN ('" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "')"; + } + + $exclude = $args['exclude']; + $exclude_tree = $args['exclude_tree']; + $include = $args['include']; + + $inclusions = ''; + if ( ! empty( $include ) ) { + $exclude = ''; + $exclude_tree = ''; + $inclusions = implode( ',', wp_parse_id_list( $include ) ); + } + + if ( ! empty( $inclusions ) ) { + $this->sql_clauses['where']['inclusions'] = 't.term_id IN ( ' . $inclusions . ' )'; + } + + $exclusions = array(); + if ( ! empty( $exclude_tree ) ) { + $exclude_tree = wp_parse_id_list( $exclude_tree ); + $excluded_children = $exclude_tree; + foreach ( $exclude_tree as $extrunk ) { + $excluded_children = array_merge( + $excluded_children, + (array) get_terms( reset( $taxonomies ), array( + 'child_of' => intval( $extrunk ), + 'fields' => 'ids', + 'hide_empty' => 0 + ) ) + ); + } + $exclusions = array_merge( $excluded_children, $exclusions ); + } + + if ( ! empty( $exclude ) ) { + $exclusions = array_merge( wp_parse_id_list( $exclude ), $exclusions ); + } + + // 'childless' terms are those without an entry in the flattened term hierarchy. + $childless = (bool) $args['childless']; + if ( $childless ) { + foreach ( $taxonomies as $_tax ) { + $term_hierarchy = _get_term_hierarchy( $_tax ); + $exclusions = array_merge( array_keys( $term_hierarchy ), $exclusions ); + } + } + + if ( ! empty( $exclusions ) ) { + $exclusions = 't.term_id NOT IN (' . implode( ',', array_map( 'intval', $exclusions ) ) . ')'; + } else { + $exclusions = ''; + } + + /** + * Filters the terms to exclude from the terms query. + * + * @since 2.3.0 + * + * @param string $exclusions `NOT IN` clause of the terms query. + * @param array $args An array of terms query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $exclusions = apply_filters( 'list_terms_exclusions', $exclusions, $args, $taxonomies ); + + if ( ! empty( $exclusions ) ) { + // Must do string manipulation here for backward compatibility with filter. + $this->sql_clauses['where']['exclusions'] = preg_replace( '/^\s*AND\s*/', '', $exclusions ); + } + + if ( + ( ! empty( $args['name'] ) ) || + ( is_string( $args['name'] ) && 0 !== strlen( $args['name'] ) ) + ) { + $names = (array) $args['name']; + foreach ( $names as &$_name ) { + // `sanitize_term_field()` returns slashed data. + $_name = stripslashes( sanitize_term_field( 'name', $_name, 0, reset( $taxonomies ), 'db' ) ); + } + + $this->sql_clauses['where']['name'] = "t.name IN ('" . implode( "', '", array_map( 'esc_sql', $names ) ) . "')"; + } + + if ( + ( ! empty( $args['slug'] ) ) || + ( is_string( $args['slug'] ) && 0 !== strlen( $args['slug'] ) ) + ) { + if ( is_array( $args['slug'] ) ) { + $slug = array_map( 'sanitize_title', $args['slug'] ); + $this->sql_clauses['where']['slug'] = "t.slug IN ('" . implode( "', '", $slug ) . "')"; + } else { + $slug = sanitize_title( $args['slug'] ); + $this->sql_clauses['where']['slug'] = "t.slug = '$slug'"; + } + } + + if ( ! empty( $args['term_taxonomy_id'] ) ) { + if ( is_array( $args['term_taxonomy_id'] ) ) { + $tt_ids = implode( ',', array_map( 'intval', $args['term_taxonomy_id'] ) ); + $this->sql_clauses['where']['term_taxonomy_id'] = "tt.term_taxonomy_id IN ({$tt_ids})"; + } else { + $this->sql_clauses['where']['term_taxonomy_id'] = $wpdb->prepare( "tt.term_taxonomy_id = %d", $args['term_taxonomy_id'] ); + } + } + + if ( ! empty( $args['name__like'] ) ) { + $this->sql_clauses['where']['name__like'] = $wpdb->prepare( "t.name LIKE %s", '%' . $wpdb->esc_like( $args['name__like'] ) . '%' ); + } + + if ( ! empty( $args['description__like'] ) ) { + $this->sql_clauses['where']['description__like'] = $wpdb->prepare( "tt.description LIKE %s", '%' . $wpdb->esc_like( $args['description__like'] ) . '%' ); + } + + if ( ! empty( $args['object_ids'] ) ) { + $object_ids = $args['object_ids']; + if ( ! is_array( $object_ids ) ) { + $object_ids = array( $object_ids ); + } + + $object_ids = implode( ', ', array_map( 'intval', $object_ids ) ); + $this->sql_clauses['where']['object_ids'] = "tr.object_id IN ($object_ids)"; + } + + /* + * When querying for object relationships, the 'count > 0' check + * added by 'hide_empty' is superfluous. + */ + if ( ! empty( $args['object_ids'] ) ) { + $args['hide_empty'] = false; + } + + if ( '' !== $parent ) { + $parent = (int) $parent; + $this->sql_clauses['where']['parent'] = "tt.parent = '$parent'"; + } + + $hierarchical = $args['hierarchical']; + if ( 'count' == $args['fields'] ) { + $hierarchical = false; + } + if ( $args['hide_empty'] && !$hierarchical ) { + $this->sql_clauses['where']['count'] = 'tt.count > 0'; + } + + $number = $args['number']; + $offset = $args['offset']; + + // Don't limit the query results when we have to descend the family tree. + if ( $number && ! $hierarchical && ! $child_of && '' === $parent ) { + if ( $offset ) { + $limits = 'LIMIT ' . $offset . ',' . $number; + } else { + $limits = 'LIMIT ' . $number; + } + } else { + $limits = ''; + } + + + if ( ! empty( $args['search'] ) ) { + $this->sql_clauses['where']['search'] = $this->get_search_sql( $args['search'] ); + } + + // Meta query support. + $join = ''; + $distinct = ''; + + // Reparse meta_query query_vars, in case they were modified in a 'pre_get_terms' callback. + $this->meta_query->parse_query_vars( $this->query_vars ); + $mq_sql = $this->meta_query->get_sql( 'term', 't', 'term_id' ); + $meta_clauses = $this->meta_query->get_clauses(); + + if ( ! empty( $meta_clauses ) ) { + $join .= $mq_sql['join']; + $this->sql_clauses['where']['meta_query'] = preg_replace( '/^\s*AND\s*/', '', $mq_sql['where'] ); + $distinct .= "DISTINCT"; + + } + + $selects = array(); + switch ( $args['fields'] ) { + case 'all': + case 'all_with_object_id' : + case 'tt_ids' : + case 'slugs' : + $selects = array( 't.*', 'tt.*' ); + if ( 'all_with_object_id' === $args['fields'] && ! empty( $args['object_ids'] ) ) { + $selects[] = 'tr.object_id'; + } + break; + case 'ids': + case 'id=>parent': + $selects = array( 't.term_id', 'tt.parent', 'tt.count', 'tt.taxonomy' ); + break; + case 'names': + $selects = array( 't.term_id', 'tt.parent', 'tt.count', 't.name', 'tt.taxonomy' ); + break; + case 'count': + $orderby = ''; + $order = ''; + $selects = array( 'COUNT(*)' ); + break; + case 'id=>name': + $selects = array( 't.term_id', 't.name', 'tt.count', 'tt.taxonomy' ); + break; + case 'id=>slug': + $selects = array( 't.term_id', 't.slug', 'tt.count', 'tt.taxonomy' ); + break; + } + + $_fields = $args['fields']; + + /** + * Filters the fields to select in the terms query. + * + * Field lists modified using this filter will only modify the term fields returned + * by the function when the `$fields` parameter set to 'count' or 'all'. In all other + * cases, the term fields in the results array will be determined by the `$fields` + * parameter alone. + * + * Use of this filter can result in unpredictable behavior, and is not recommended. + * + * @since 2.8.0 + * + * @param array $selects An array of fields to select for the terms query. + * @param array $args An array of term query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) ); + + $join .= " INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; + + if ( ! empty( $this->query_vars['object_ids'] ) ) { + $join .= " INNER JOIN {$wpdb->term_relationships} AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id"; + } + + $where = implode( ' AND ', $this->sql_clauses['where'] ); + + /** + * Filters the terms query SQL clauses. + * + * @since 3.1.0 + * + * @param array $pieces Terms query SQL clauses. + * @param array $taxonomies An array of taxonomies. + * @param array $args An array of terms query arguments. + */ + $clauses = apply_filters( 'terms_clauses', compact( 'fields', 'join', 'where', 'distinct', 'orderby', 'order', 'limits' ), $taxonomies, $args ); + + $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : ''; + $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : ''; + $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : ''; + $distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : ''; + $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : ''; + $order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : ''; + $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : ''; + + if ( $where ) { + $where = "WHERE $where"; + } + + $this->sql_clauses['select'] = "SELECT $distinct $fields"; + $this->sql_clauses['from'] = "FROM $wpdb->terms AS t $join"; + $this->sql_clauses['orderby'] = $orderby ? "$orderby $order" : ''; + $this->sql_clauses['limits'] = $limits; + + $this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}"; + + // $args can be anything. Only use the args defined in defaults to compute the key. + $key = md5( serialize( wp_array_slice_assoc( $args, array_keys( $this->query_var_defaults ) ) ) . serialize( $taxonomies ) . $this->request ); + $last_changed = wp_cache_get_last_changed( 'terms' ); + $cache_key = "get_terms:$key:$last_changed"; + $cache = wp_cache_get( $cache_key, 'terms' ); + if ( false !== $cache ) { + if ( 'all' === $_fields || 'all_with_object_id' === $_fields ) { + $cache = $this->populate_terms( $cache ); + } + + $this->terms = $cache; + return $this->terms; + } + + if ( 'count' == $_fields ) { + $count = $wpdb->get_var( $this->request ); + wp_cache_set( $cache_key, $count, 'terms' ); + return $count; + } + + $terms = $wpdb->get_results( $this->request ); + if ( 'all' == $_fields || 'all_with_object_id' === $_fields ) { + update_term_cache( $terms ); + } + + // Prime termmeta cache. + if ( $args['update_term_meta_cache'] ) { + $term_ids = wp_list_pluck( $terms, 'term_id' ); + update_termmeta_cache( $term_ids ); + } + + if ( empty( $terms ) ) { + wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS ); + return array(); + } + + if ( $child_of ) { + foreach ( $taxonomies as $_tax ) { + $children = _get_term_hierarchy( $_tax ); + if ( ! empty( $children ) ) { + $terms = _get_term_children( $child_of, $terms, $_tax ); + } + } + } + + // Update term counts to include children. + if ( $args['pad_counts'] && 'all' == $_fields ) { + foreach ( $taxonomies as $_tax ) { + _pad_term_counts( $terms, $_tax ); + } + } + + // Make sure we show empty categories that have children. + if ( $hierarchical && $args['hide_empty'] && is_array( $terms ) ) { + foreach ( $terms as $k => $term ) { + if ( ! $term->count ) { + $children = get_term_children( $term->term_id, $term->taxonomy ); + if ( is_array( $children ) ) { + foreach ( $children as $child_id ) { + $child = get_term( $child_id, $term->taxonomy ); + if ( $child->count ) { + continue 2; + } + } + } + + // It really is empty. + unset( $terms[ $k ] ); + } + } + } + + /* + * When querying for terms connected to objects, we may get + * duplicate results. The duplicates should be preserved if + * `$fields` is 'all_with_object_id', but should otherwise be + * removed. + */ + if ( ! empty( $args['object_ids'] ) && 'all_with_object_id' != $_fields ) { + $_tt_ids = $_terms = array(); + foreach ( $terms as $term ) { + if ( isset( $_tt_ids[ $term->term_id ] ) ) { + continue; + } + + $_tt_ids[ $term->term_id ] = 1; + $_terms[] = $term; + } + + $terms = $_terms; + } + + $_terms = array(); + if ( 'id=>parent' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->parent; + } + } elseif ( 'ids' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[] = (int) $term->term_id; + } + } elseif ( 'tt_ids' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[] = (int) $term->term_taxonomy_id; + } + } elseif ( 'names' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[] = $term->name; + } + } elseif ( 'slugs' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[] = $term->slug; + } + } elseif ( 'id=>name' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->name; + } + } elseif ( 'id=>slug' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->slug; + } + } + + if ( ! empty( $_terms ) ) { + $terms = $_terms; + } + + // Hierarchical queries are not limited, so 'offset' and 'number' must be handled now. + if ( $hierarchical && $number && is_array( $terms ) ) { + if ( $offset >= count( $terms ) ) { + $terms = array(); + } else { + $terms = array_slice( $terms, $offset, $number, true ); + } + } + + wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS ); + + if ( 'all' === $_fields || 'all_with_object_id' === $_fields ) { + $terms = $this->populate_terms( $terms ); + } + + $this->terms = $terms; + return $this->terms; + } + + /** + * Parse and sanitize 'orderby' keys passed to the term query. + * + * @since 4.6.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $orderby_raw Alias for the field to order by. + * @return string|false Value to used in the ORDER clause. False otherwise. + */ + protected function parse_orderby( $orderby_raw ) { + $_orderby = strtolower( $orderby_raw ); + $maybe_orderby_meta = false; + + if ( in_array( $_orderby, array( 'term_id', 'name', 'slug', 'term_group' ), true ) ) { + $orderby = "t.$_orderby"; + } elseif ( in_array( $_orderby, array( 'count', 'parent', 'taxonomy', 'term_taxonomy_id', 'description' ), true ) ) { + $orderby = "tt.$_orderby"; + } elseif ( 'term_order' === $_orderby ) { + $orderby = 'tr.term_order'; + } elseif ( 'include' == $_orderby && ! empty( $this->query_vars['include'] ) ) { + $include = implode( ',', wp_parse_id_list( $this->query_vars['include'] ) ); + $orderby = "FIELD( t.term_id, $include )"; + } elseif ( 'slug__in' == $_orderby && ! empty( $this->query_vars['slug'] ) && is_array( $this->query_vars['slug'] ) ) { + $slugs = implode( "', '", array_map( 'sanitize_title_for_query', $this->query_vars['slug'] ) ); + $orderby = "FIELD( t.slug, '" . $slugs . "')"; + } elseif ( 'none' == $_orderby ) { + $orderby = ''; + } elseif ( empty( $_orderby ) || 'id' == $_orderby || 'term_id' === $_orderby ) { + $orderby = 't.term_id'; + } else { + $orderby = 't.name'; + + // This may be a value of orderby related to meta. + $maybe_orderby_meta = true; + } + + /** + * Filters the ORDERBY clause of the terms query. + * + * @since 2.8.0 + * + * @param string $orderby `ORDERBY` clause of the terms query. + * @param array $args An array of terms query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $orderby = apply_filters( 'get_terms_orderby', $orderby, $this->query_vars, $this->query_vars['taxonomy'] ); + + // Run after the 'get_terms_orderby' filter for backward compatibility. + if ( $maybe_orderby_meta ) { + $maybe_orderby_meta = $this->parse_orderby_meta( $_orderby ); + if ( $maybe_orderby_meta ) { + $orderby = $maybe_orderby_meta; + } + } + + return $orderby; + } + + /** + * Generate the ORDER BY clause for an 'orderby' param that is potentially related to a meta query. + * + * @since 4.6.0 + * + * @param string $orderby_raw Raw 'orderby' value passed to WP_Term_Query. + * @return string ORDER BY clause. + */ + protected function parse_orderby_meta( $orderby_raw ) { + $orderby = ''; + + // Tell the meta query to generate its SQL, so we have access to table aliases. + $this->meta_query->get_sql( 'term', 't', 'term_id' ); + $meta_clauses = $this->meta_query->get_clauses(); + if ( ! $meta_clauses || ! $orderby_raw ) { + return $orderby; + } + + $allowed_keys = array(); + $primary_meta_key = null; + $primary_meta_query = reset( $meta_clauses ); + if ( ! empty( $primary_meta_query['key'] ) ) { + $primary_meta_key = $primary_meta_query['key']; + $allowed_keys[] = $primary_meta_key; + } + $allowed_keys[] = 'meta_value'; + $allowed_keys[] = 'meta_value_num'; + $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_clauses ) ); + + if ( ! in_array( $orderby_raw, $allowed_keys, true ) ) { + return $orderby; + } + + switch( $orderby_raw ) { + case $primary_meta_key: + case 'meta_value': + if ( ! empty( $primary_meta_query['type'] ) ) { + $orderby = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})"; + } else { + $orderby = "{$primary_meta_query['alias']}.meta_value"; + } + break; + + case 'meta_value_num': + $orderby = "{$primary_meta_query['alias']}.meta_value+0"; + break; + + default: + if ( array_key_exists( $orderby_raw, $meta_clauses ) ) { + // $orderby corresponds to a meta_query clause. + $meta_clause = $meta_clauses[ $orderby_raw ]; + $orderby = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})"; + } + break; + } + + return $orderby; + } + + /** + * Parse an 'order' query variable and cast it to ASC or DESC as necessary. + * + * @since 4.6.0 + * + * @param string $order The 'order' query variable. + * @return string The sanitized 'order' query variable. + */ + protected function parse_order( $order ) { + if ( ! is_string( $order ) || empty( $order ) ) { + return 'DESC'; + } + + if ( 'ASC' === strtoupper( $order ) ) { + return 'ASC'; + } else { + return 'DESC'; + } + } + + /** + * Used internally to generate a SQL string related to the 'search' parameter. + * + * @since 4.6.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $string + * @return string + */ + protected function get_search_sql( $string ) { + global $wpdb; + + $like = '%' . $wpdb->esc_like( $string ) . '%'; + + return $wpdb->prepare( '((t.name LIKE %s) OR (t.slug LIKE %s))', $like, $like ); + } + + /** + * Creates an array of term objects from an array of term IDs. + * + * Also discards invalid term objects. + * + * @since 4.9.8 + * + * @param array $term_ids Term IDs. + * @return array + */ + protected function populate_terms( $term_ids ) { + $terms = array(); + + if ( ! is_array( $term_ids ) ) { + return $terms; + } + + foreach ( $term_ids as $key => $term_id ) { + $term = get_term( $term_id ); + if ( $term instanceof WP_Term ) { + $terms[ $key ] = $term; + } + } + + return $terms; + } +}