X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/53f4633144ed68c8b8fb5861f992b5489894a940..16e7b37c7914d753890c1a05a9335f3b43751eb8:/wp-includes/meta.php diff --git a/wp-includes/meta.php b/wp-includes/meta.php index a0700b07..cfb9d95a 100644 --- a/wp-includes/meta.php +++ b/wp-includes/meta.php @@ -1,6 +1,6 @@ get_col( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ); if ( empty( $meta_ids ) ) { - return add_metadata($meta_type, $object_id, $meta_key, $passed_value); + return add_metadata( $meta_type, $object_id, $raw_meta_key, $passed_value ); } $_meta_value = $meta_value; @@ -228,10 +228,8 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v * @param mixed $meta_value Meta value. */ do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); - } - if ( 'post' == $meta_type ) { - foreach ( $meta_ids as $meta_id ) { + if ( 'post' == $meta_type ) { /** * Fires immediately before updating a post's metadata. * @@ -267,10 +265,8 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v * @param mixed $meta_value Meta value. */ do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); - } - if ( 'post' == $meta_type ) { - foreach ( $meta_ids as $meta_id ) { + if ( 'post' == $meta_type ) { /** * Fires immediately after updating a post's metadata. * @@ -332,7 +328,7 @@ function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $d $meta_value = wp_unslash($meta_value); /** - * Filter whether to delete metadata of a specific type. + * Filters whether to delete metadata of a specific type. * * The dynamic portion of the hook, `$meta_type`, refers to the meta * object type (comment, post, or user). Returning a non-null value @@ -367,8 +363,14 @@ function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $d if ( !count( $meta_ids ) ) return false; - if ( $delete_all ) - $object_ids = $wpdb->get_col( $wpdb->prepare( "SELECT $type_column FROM $table WHERE meta_key = %s", $meta_key ) ); + if ( $delete_all ) { + $value_clause = ''; + if ( '' !== $meta_value && null !== $meta_value && false !== $meta_value ) { + $value_clause = $wpdb->prepare( " AND meta_value = %s", $meta_value ); + } + + $object_ids = $wpdb->get_col( $wpdb->prepare( "SELECT $type_column FROM $table WHERE meta_key = %s $value_clause", $meta_key ) ); + } /** * Fires immediately before deleting metadata of a specific type. @@ -467,7 +469,7 @@ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) { } /** - * Filter whether to retrieve metadata of a specific type. + * Filters whether to retrieve metadata of a specific type. * * The dynamic portion of the hook, `$meta_type`, refers to the meta * object type (comment, post, or user). Returning a non-null value @@ -475,12 +477,11 @@ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) { * * @since 3.1.0 * - * @param null|array|string $value The value get_metadata() should - * return - a single metadata value, + * @param null|array|string $value The value get_metadata() should return - a single metadata value, * or an array of values. * @param int $object_id Object ID. * @param string $meta_key Meta key. - * @param string|array $single Meta value, or an array of values. + * @param bool $single Whether to return only the first value of the specified $meta_key. */ $check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, $single ); if ( null !== $check ) { @@ -557,21 +558,21 @@ function metadata_exists( $meta_type, $object_id, $meta_key ) { * * @since 3.3.0 * - * @global wpdb $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * - * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) + * @param string $meta_type Type of object metadata is for (e.g., comment, post, term, or user). * @param int $meta_id ID for a specific meta row * @return object|false Meta object or false. */ function get_metadata_by_mid( $meta_type, $meta_id ) { global $wpdb; - if ( ! $meta_type || ! is_numeric( $meta_id ) ) { + if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) { return false; } - $meta_id = absint( $meta_id ); - if ( ! $meta_id ) { + $meta_id = intval( $meta_id ); + if ( $meta_id <= 0 ) { return false; } @@ -598,7 +599,7 @@ function get_metadata_by_mid( $meta_type, $meta_id ) { * * @since 3.3.0 * - * @global wpdb $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $meta_id ID for a specific meta row @@ -610,12 +611,12 @@ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = global $wpdb; // Make sure everything is valid. - if ( ! $meta_type || ! is_numeric( $meta_id ) ) { + if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) { return false; } - $meta_id = absint( $meta_id ); - if ( ! $meta_id ) { + $meta_id = intval( $meta_id ); + if ( $meta_id <= 0 ) { return false; } @@ -691,9 +692,9 @@ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = * * @since 3.3.0 * - * @global wpdb $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * - * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) + * @param string $meta_type Type of object metadata is for (e.g., comment, post, term, or user). * @param int $meta_id ID for a specific meta row * @return bool True on successful delete, false on failure. */ @@ -701,12 +702,12 @@ function delete_metadata_by_mid( $meta_type, $meta_id ) { global $wpdb; // Make sure everything is valid. - if ( ! $meta_type || ! is_numeric( $meta_id ) ) { + if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) { return false; } - $meta_id = absint( $meta_id ); - if ( ! $meta_id ) { + $meta_id = intval( $meta_id ); + if ( $meta_id <= 0 ) { return false; } @@ -850,6 +851,23 @@ function update_meta_cache($meta_type, $object_ids) { return $cache; } +/** + * Retrieves the queue for lazy-loading metadata. + * + * @since 4.5.0 + * + * @return WP_Metadata_Lazyloader $lazyloader Metadata lazyloader queue. + */ +function wp_metadata_lazyloader() { + static $wp_metadata_lazyloader; + + if ( null === $wp_metadata_lazyloader ) { + $wp_metadata_lazyloader = new WP_Metadata_Lazyloader(); + } + + return $wp_metadata_lazyloader; +} + /** * Given a meta query, generates SQL clauses to be appended to a main query. * @@ -870,836 +888,324 @@ function get_meta_sql( $meta_query, $type, $primary_table, $primary_id_column, $ } /** - * Class for generating SQL clauses that filter a primary query according to metadata keys and values. + * Retrieve the name of the metadata table for the specified object type. * - * `WP_Meta_Query` is a helper that allows primary query classes, such as {@see WP_Query} and {@see WP_User_Query}, - * to filter their results by object metadata, by generating `JOIN` and `WHERE` subclauses to be attached - * to the primary SQL query string. + * @since 2.9.0 * - * @since 3.2.0 + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $type Type of object to get metadata table for (e.g., comment, post, or user) + * @return string|false Metadata table name, or false if no metadata table exists */ -class WP_Meta_Query { - /** - * Array of metadata queries. - * - * See {@see WP_Meta_Query::__construct()} for information on meta query arguments. - * - * @since 3.2.0 - * @access public - * @var array - */ - public $queries = array(); - - /** - * The relation between the queries. Can be one of 'AND' or 'OR'. - * - * @since 3.2.0 - * @access public - * @var string - */ - public $relation; - - /** - * Database table to query for the metadata. - * - * @since 4.1.0 - * @access public - * @var string - */ - public $meta_table; - - /** - * Column in meta_table that represents the ID of the object the metadata belongs to. - * - * @since 4.1.0 - * @access public - * @var string - */ - public $meta_id_column; - - /** - * Database table that where the metadata's objects are stored (eg $wpdb->users). - * - * @since 4.1.0 - * @access public - * @var string - */ - public $primary_table; +function _get_meta_table($type) { + global $wpdb; - /** - * Column in primary_table that represents the ID of the object. - * - * @since 4.1.0 - * @access public - * @var string - */ - public $primary_id_column; + $table_name = $type . 'meta'; - /** - * A flat list of table aliases used in JOIN clauses. - * - * @since 4.1.0 - * @access protected - * @var array - */ - protected $table_aliases = array(); + if ( empty($wpdb->$table_name) ) + return false; - /** - * A flat list of clauses, keyed by clause 'name'. - * - * @since 4.2.0 - * @access protected - * @var array - */ - protected $clauses = array(); + return $wpdb->$table_name; +} - /** - * Whether the query contains any OR relations. - * - * @since 4.3.0 - * @access protected - * @var bool - */ - protected $has_or_relation = false; +/** + * Determine whether a meta key is protected. + * + * @since 3.1.3 + * + * @param string $meta_key Meta key + * @param string|null $meta_type + * @return bool True if the key is protected, false otherwise. + */ +function is_protected_meta( $meta_key, $meta_type = null ) { + $protected = ( '_' == $meta_key[0] ); /** - * Constructor. + * Filters whether a meta key is protected. * * @since 3.2.0 - * @since 4.2.0 Introduced support for naming query clauses by associative array keys. * - * @access public - * - * @param array $meta_query { - * Array of meta query clauses. When first-order clauses use strings as their array keys, they may be - * referenced in the 'orderby' parameter of the parent query. - * - * @type string $relation Optional. The MySQL keyword used to join - * the clauses of the query. Accepts 'AND', or 'OR'. Default 'AND'. - * @type array { - * Optional. An array of first-order clause parameters, or another fully-formed meta query. - * - * @type string $key Meta key to filter by. - * @type string $value Meta value to filter by. - * @type string $compare MySQL operator used for comparing the $value. Accepts '=', - * '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN', - * 'BETWEEN', 'NOT BETWEEN', 'REGEXP', 'NOT REGEXP', or 'RLIKE'. - * Default is 'IN' when `$value` is an array, '=' otherwise. - * @type string $type MySQL data type that the meta_value column will be CAST to for - * comparisons. Accepts 'NUMERIC', 'BINARY', 'CHAR', 'DATE', - * 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', or 'UNSIGNED'. - * Default is 'CHAR'. - * } - * } + * @param bool $protected Whether the key is protected. Default false. + * @param string $meta_key Meta key. + * @param string $meta_type Meta type. */ - public function __construct( $meta_query = false ) { - if ( !$meta_query ) - return; - - if ( isset( $meta_query['relation'] ) && strtoupper( $meta_query['relation'] ) == 'OR' ) { - $this->relation = 'OR'; - } else { - $this->relation = 'AND'; - } - - $this->queries = $this->sanitize_query( $meta_query ); - } + return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type ); +} +/** + * Sanitize meta value. + * + * @since 3.1.3 + * + * @param string $meta_key Meta key. + * @param mixed $meta_value Meta value to sanitize. + * @param string $object_type Type of object the meta is registered to. + * + * @return mixed Sanitized $meta_value. + */ +function sanitize_meta( $meta_key, $meta_value, $object_type ) { /** - * Ensure the 'meta_query' argument passed to the class constructor is well-formed. + * Filters the sanitization of a specific meta key of a specific meta type. * - * Eliminates empty items and ensures that a 'relation' is set. + * The dynamic portions of the hook name, `$meta_type`, and `$meta_key`, + * refer to the metadata object type (comment, post, or user) and the meta + * key value, respectively. * - * @since 4.1.0 - * @access public + * @since 3.3.0 * - * @param array $queries Array of query clauses. - * @return array Sanitized array of query clauses. + * @param mixed $meta_value Meta value to sanitize. + * @param string $meta_key Meta key. + * @param string $object_type Object type. */ - public function sanitize_query( $queries ) { - $clean_queries = array(); - - if ( ! is_array( $queries ) ) { - return $clean_queries; - } - - foreach ( $queries as $key => $query ) { - if ( 'relation' === $key ) { - $relation = $query; - - } elseif ( ! is_array( $query ) ) { - continue; - - // First-order clause. - } elseif ( $this->is_first_order_clause( $query ) ) { - if ( isset( $query['value'] ) && array() === $query['value'] ) { - unset( $query['value'] ); - } - - $clean_queries[ $key ] = $query; - - // Otherwise, it's a nested query, so we recurse. - } else { - $cleaned_query = $this->sanitize_query( $query ); - - if ( ! empty( $cleaned_query ) ) { - $clean_queries[ $key ] = $cleaned_query; - } - } - } - - if ( empty( $clean_queries ) ) { - return $clean_queries; - } + return apply_filters( "sanitize_{$object_type}_meta_{$meta_key}", $meta_value, $meta_key, $object_type ); +} - // Sanitize the 'relation' key provided in the query. - if ( isset( $relation ) && 'OR' === strtoupper( $relation ) ) { - $clean_queries['relation'] = 'OR'; - $this->has_or_relation = true; +/** + * Registers a meta key. + * + * @since 3.3.0 + * @since 4.6.0 {@link https://core.trac.wordpress.org/ticket/35658 Modified + * to support an array of data to attach to registered meta keys}. Previous arguments for + * `$sanitize_callback` and `$auth_callback` have been folded into this array. + * + * @param string $object_type Type of object this meta is registered to. + * @param string $meta_key Meta key to register. + * @param array $args { + * Data used to describe the meta key when registered. + * + * @type string $type The type of data associated with this meta key. + * @type string $description A description of the data attached to this meta key. + * @type bool $single Whether the meta key has one value per object, or an array of values per object. + * @type string $sanitize_callback A function or method to call when sanitizing `$meta_key` data. + * @type string $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks. + * @type bool $show_in_rest Whether data associated with this meta key can be considered public. + * } + * @param string|array $deprecated Deprecated. Use `$args` instead. + * + * @return bool True if the meta key was successfully registered in the global array, false if not. + * Registering a meta key with distinct sanitize and auth callbacks will fire those + * callbacks, but will not add to the global registry. + */ +function register_meta( $object_type, $meta_key, $args, $deprecated = null ) { + global $wp_meta_keys; - /* - * If there is only a single clause, call the relation 'OR'. - * This value will not actually be used to join clauses, but it - * simplifies the logic around combining key-only queries. - */ - } elseif ( 1 === count( $clean_queries ) ) { - $clean_queries['relation'] = 'OR'; + if ( ! is_array( $wp_meta_keys ) ) { + $wp_meta_keys = array(); + } - // Default to AND. - } else { - $clean_queries['relation'] = 'AND'; - } + $defaults = array( + 'type' => 'string', + 'description' => '', + 'single' => false, + 'sanitize_callback' => null, + 'auth_callback' => null, + 'show_in_rest' => false, + ); + + // There used to be individual args for sanitize and auth callbacks + $has_old_sanitize_cb = false; + $has_old_auth_cb = false; + + if ( is_callable( $args ) ) { + $args = array( + 'sanitize_callback' => $args, + ); - return $clean_queries; + $has_old_sanitize_cb = true; + } else { + $args = (array) $args; } - /** - * Determine whether a query clause is first-order. - * - * A first-order meta query clause is one that has either a 'key' or - * a 'value' array key. - * - * @since 4.1.0 - * @access protected - * - * @param array $query Meta query arguments. - * @return bool Whether the query clause is a first-order clause. - */ - protected function is_first_order_clause( $query ) { - return isset( $query['key'] ) || isset( $query['value'] ); + if ( is_callable( $deprecated ) ) { + $args['auth_callback'] = $deprecated; + $has_old_auth_cb = true; } /** - * Constructs a meta query based on 'meta_*' query vars + * Filters the registration arguments when registering meta. * - * @since 3.2.0 - * @access public + * @since 4.6.0 * - * @param array $qv The query variables + * @param array $args Array of meta registration arguments. + * @param array $defaults Array of default arguments. + * @param string $object_type Object type. + * @param string $meta_key Meta key. */ - public function parse_query_vars( $qv ) { - $meta_query = array(); - - /* - * For orderby=meta_value to work correctly, simple query needs to be - * first (so that its table join is against an unaliased meta table) and - * needs to be its own clause (so it doesn't interfere with the logic of - * the rest of the meta_query). - */ - $primary_meta_query = array(); - foreach ( array( 'key', 'compare', 'type' ) as $key ) { - if ( ! empty( $qv[ "meta_$key" ] ) ) { - $primary_meta_query[ $key ] = $qv[ "meta_$key" ]; - } - } - - // WP_Query sets 'meta_value' = '' by default. - if ( isset( $qv['meta_value'] ) && '' !== $qv['meta_value'] && ( ! is_array( $qv['meta_value'] ) || $qv['meta_value'] ) ) { - $primary_meta_query['value'] = $qv['meta_value']; - } + $args = apply_filters( 'register_meta_args', $args, $defaults, $object_type, $meta_key ); + $args = wp_parse_args( $args, $defaults ); - $existing_meta_query = isset( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ? $qv['meta_query'] : array(); - - if ( ! empty( $primary_meta_query ) && ! empty( $existing_meta_query ) ) { - $meta_query = array( - 'relation' => 'AND', - $primary_meta_query, - $existing_meta_query, - ); - } elseif ( ! empty( $primary_meta_query ) ) { - $meta_query = array( - $primary_meta_query, - ); - } elseif ( ! empty( $existing_meta_query ) ) { - $meta_query = $existing_meta_query; + // If `auth_callback` is not provided, fall back to `is_protected_meta()`. + if ( empty( $args['auth_callback'] ) ) { + if ( is_protected_meta( $meta_key, $object_type ) ) { + $args['auth_callback'] = '__return_false'; + } else { + $args['auth_callback'] = '__return_true'; } - - $this->__construct( $meta_query ); } - /** - * Return the appropriate alias for the given meta type if applicable. - * - * @since 3.7.0 - * @access public - * - * @param string $type MySQL type to cast meta_value. - * @return string MySQL type. - */ - public function get_cast_for_type( $type = '' ) { - if ( empty( $type ) ) - return 'CHAR'; - - $meta_type = strtoupper( $type ); - - if ( ! preg_match( '/^(?:BINARY|CHAR|DATE|DATETIME|SIGNED|UNSIGNED|TIME|NUMERIC(?:\(\d+(?:,\s?\d+)?\))?|DECIMAL(?:\(\d+(?:,\s?\d+)?\))?)$/', $meta_type ) ) - return 'CHAR'; - - if ( 'NUMERIC' == $meta_type ) - $meta_type = 'SIGNED'; - - return $meta_type; + // Back-compat: old sanitize and auth callbacks are applied to all of an object type. + if ( is_callable( $args['sanitize_callback'] ) ) { + add_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'], 10, 3 ); } - /** - * Generates SQL clauses to be appended to a main query. - * - * @since 3.2.0 - * @access public - * - * @param string $type Type of meta, eg 'user', 'post'. - * @param string $primary_table Database table where the object being filtered is stored (eg wp_users). - * @param string $primary_id_column ID column for the filtered object in $primary_table. - * @param object $context Optional. The main query object. - * @return false|array { - * Array containing JOIN and WHERE SQL clauses to append to the main query. - * - * @type string $join SQL fragment to append to the main JOIN clause. - * @type string $where SQL fragment to append to the main WHERE clause. - * } - */ - public function get_sql( $type, $primary_table, $primary_id_column, $context = null ) { - if ( ! $meta_table = _get_meta_table( $type ) ) { - return false; - } - - $this->meta_table = $meta_table; - $this->meta_id_column = sanitize_key( $type . '_id' ); - - $this->primary_table = $primary_table; - $this->primary_id_column = $primary_id_column; - - $sql = $this->get_sql_clauses(); - - /* - * If any JOINs are LEFT JOINs (as in the case of NOT EXISTS), then all JOINs should - * be LEFT. Otherwise posts with no metadata will be excluded from results. - */ - if ( false !== strpos( $sql['join'], 'LEFT JOIN' ) ) { - $sql['join'] = str_replace( 'INNER JOIN', 'LEFT JOIN', $sql['join'] ); - } - - /** - * Filter the meta query's generated SQL. - * - * @since 3.1.0 - * - * @param array $args { - * An array of meta query SQL arguments. - * - * @type array $clauses Array containing the query's JOIN and WHERE clauses. - * @type array $queries Array of meta queries. - * @type string $type Type of meta. - * @type string $primary_table Primary table. - * @type string $primary_id_column Primary column ID. - * @type object $context The main query object. - * } - */ - return apply_filters_ref_array( 'get_meta_sql', array( $sql, $this->queries, $type, $primary_table, $primary_id_column, $context ) ); + if ( is_callable( $args['auth_callback'] ) ) { + add_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'], 10, 6 ); } - /** - * Generate SQL clauses to be appended to a main query. - * - * Called by the public {@see WP_Meta_Query::get_sql()}, this method - * is abstracted out to maintain parity with the other Query classes. - * - * @since 4.1.0 - * @access protected - * - * @return array { - * Array containing JOIN and WHERE SQL clauses to append to the main query. - * - * @type string $join SQL fragment to append to the main JOIN clause. - * @type string $where SQL fragment to append to the main WHERE clause. - * } - */ - protected function get_sql_clauses() { - /* - * $queries are passed by reference to get_sql_for_query() for recursion. - * To keep $this->queries unaltered, pass a copy. - */ - $queries = $this->queries; - $sql = $this->get_sql_for_query( $queries ); - - if ( ! empty( $sql['where'] ) ) { - $sql['where'] = ' AND ' . $sql['where']; - } + // Global registry only contains meta keys registered with the array of arguments added in 4.6.0. + if ( ! $has_old_auth_cb && ! $has_old_sanitize_cb ) { + $wp_meta_keys[ $object_type ][ $meta_key ] = $args; - return $sql; + return true; } - /** - * Generate SQL clauses for a single query array. - * - * If nested subqueries are found, this method recurses the tree to - * produce the properly nested SQL. - * - * @since 4.1.0 - * @access protected - * - * @param array $query Query to parse, passed by reference. - * @param int $depth Optional. Number of tree levels deep we currently are. - * Used to calculate indentation. Default 0. - * @return array { - * Array containing JOIN and WHERE SQL clauses to append to a single query array. - * - * @type string $join SQL fragment to append to the main JOIN clause. - * @type string $where SQL fragment to append to the main WHERE clause. - * } - */ - protected function get_sql_for_query( &$query, $depth = 0 ) { - $sql_chunks = array( - 'join' => array(), - 'where' => array(), - ); - - $sql = array( - 'join' => '', - 'where' => '', - ); - - $indent = ''; - for ( $i = 0; $i < $depth; $i++ ) { - $indent .= " "; - } - - foreach ( $query as $key => &$clause ) { - if ( 'relation' === $key ) { - $relation = $query['relation']; - } elseif ( is_array( $clause ) ) { - - // This is a first-order clause. - if ( $this->is_first_order_clause( $clause ) ) { - $clause_sql = $this->get_sql_for_clause( $clause, $query, $key ); - - $where_count = count( $clause_sql['where'] ); - if ( ! $where_count ) { - $sql_chunks['where'][] = ''; - } elseif ( 1 === $where_count ) { - $sql_chunks['where'][] = $clause_sql['where'][0]; - } else { - $sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )'; - } - - $sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] ); - // This is a subquery, so we recurse. - } else { - $clause_sql = $this->get_sql_for_query( $clause, $depth + 1 ); - - $sql_chunks['where'][] = $clause_sql['where']; - $sql_chunks['join'][] = $clause_sql['join']; - } - } - } - - // Filter to remove empties. - $sql_chunks['join'] = array_filter( $sql_chunks['join'] ); - $sql_chunks['where'] = array_filter( $sql_chunks['where'] ); - - if ( empty( $relation ) ) { - $relation = 'AND'; - } - - // Filter duplicate JOIN clauses and combine into a single string. - if ( ! empty( $sql_chunks['join'] ) ) { - $sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) ); - } + return false; +} - // Generate a single WHERE clause with proper brackets and indentation. - if ( ! empty( $sql_chunks['where'] ) ) { - $sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')'; - } +/** + * Checks if a meta key is registered. + * + * @since 4.6.0 + * + * @param string $object_type The type of object. + * @param string $meta_key The meta key. + * + * @return bool True if the meta key is registered to the object type. False if not. + */ +function registered_meta_key_exists( $object_type, $meta_key ) { + global $wp_meta_keys; - return $sql; + if ( ! is_array( $wp_meta_keys ) ) { + return false; } - /** - * Generate SQL JOIN and WHERE clauses for a first-order query clause. - * - * "First-order" means that it's an array with a 'key' or 'value'. - * - * @since 4.1.0 - * @access public - * - * @global wpdb $wpdb - * - * @param array $clause Query clause, passed by reference. - * @param array $parent_query Parent query array. - * @param string $clause_key Optional. The array key used to name the clause in the original `$meta_query` - * parameters. If not provided, a key will be generated automatically. - * @return array { - * Array containing JOIN and WHERE SQL clauses to append to a first-order query. - * - * @type string $join SQL fragment to append to the main JOIN clause. - * @type string $where SQL fragment to append to the main WHERE clause. - * } - */ - public function get_sql_for_clause( &$clause, $parent_query, $clause_key = '' ) { - global $wpdb; - - $sql_chunks = array( - 'where' => array(), - 'join' => array(), - ); - - if ( isset( $clause['compare'] ) ) { - $clause['compare'] = strtoupper( $clause['compare'] ); - } else { - $clause['compare'] = isset( $clause['value'] ) && is_array( $clause['value'] ) ? 'IN' : '='; - } - - if ( ! in_array( $clause['compare'], array( - '=', '!=', '>', '>=', '<', '<=', - 'LIKE', 'NOT LIKE', - 'IN', 'NOT IN', - 'BETWEEN', 'NOT BETWEEN', - 'EXISTS', 'NOT EXISTS', - 'REGEXP', 'NOT REGEXP', 'RLIKE' - ) ) ) { - $clause['compare'] = '='; - } - - $meta_compare = $clause['compare']; - - // First build the JOIN clause, if one is required. - $join = ''; - - // We prefer to avoid joins if possible. Look for an existing join compatible with this clause. - $alias = $this->find_compatible_table_alias( $clause, $parent_query ); - if ( false === $alias ) { - $i = count( $this->table_aliases ); - $alias = $i ? 'mt' . $i : $this->meta_table; - - // JOIN clauses for NOT EXISTS have their own syntax. - if ( 'NOT EXISTS' === $meta_compare ) { - $join .= " LEFT JOIN $this->meta_table"; - $join .= $i ? " AS $alias" : ''; - $join .= $wpdb->prepare( " ON ($this->primary_table.$this->primary_id_column = $alias.$this->meta_id_column AND $alias.meta_key = %s )", $clause['key'] ); - - // All other JOIN clauses. - } else { - $join .= " INNER JOIN $this->meta_table"; - $join .= $i ? " AS $alias" : ''; - $join .= " ON ( $this->primary_table.$this->primary_id_column = $alias.$this->meta_id_column )"; - } - - $this->table_aliases[] = $alias; - $sql_chunks['join'][] = $join; - } - - // Save the alias to this clause, for future siblings to find. - $clause['alias'] = $alias; - - // Determine the data type. - $_meta_type = isset( $clause['type'] ) ? $clause['type'] : ''; - $meta_type = $this->get_cast_for_type( $_meta_type ); - $clause['cast'] = $meta_type; - - // Fallback for clause keys is the table alias. - if ( ! $clause_key ) { - $clause_key = $clause['alias']; - } + if ( ! isset( $wp_meta_keys[ $object_type ] ) ) { + return false; + } - // Ensure unique clause keys, so none are overwritten. - $iterator = 1; - $clause_key_base = $clause_key; - while ( isset( $this->clauses[ $clause_key ] ) ) { - $clause_key = $clause_key_base . '-' . $iterator; - $iterator++; - } + if ( isset( $wp_meta_keys[ $object_type ][ $meta_key ] ) ) { + return true; + } - // Store the clause in our flat array. - $this->clauses[ $clause_key ] =& $clause; + return false; +} - // Next, build the WHERE clause. +/** + * Unregisters a meta key from the list of registered keys. + * + * @since 4.6.0 + * + * @param string $object_type The type of object. + * @param string $meta_key The meta key. + * @return bool True if successful. False if the meta key was not registered. + */ +function unregister_meta_key( $object_type, $meta_key ) { + global $wp_meta_keys; - // meta_key. - if ( array_key_exists( 'key', $clause ) ) { - if ( 'NOT EXISTS' === $meta_compare ) { - $sql_chunks['where'][] = $alias . '.' . $this->meta_id_column . ' IS NULL'; - } else { - $sql_chunks['where'][] = $wpdb->prepare( "$alias.meta_key = %s", trim( $clause['key'] ) ); - } - } + if ( ! registered_meta_key_exists( $object_type, $meta_key ) ) { + return false; + } - // meta_value. - if ( array_key_exists( 'value', $clause ) ) { - $meta_value = $clause['value']; - - if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) { - if ( ! is_array( $meta_value ) ) { - $meta_value = preg_split( '/[,\s]+/', $meta_value ); - } - } else { - $meta_value = trim( $meta_value ); - } - - switch ( $meta_compare ) { - case 'IN' : - case 'NOT IN' : - $meta_compare_string = '(' . substr( str_repeat( ',%s', count( $meta_value ) ), 1 ) . ')'; - $where = $wpdb->prepare( $meta_compare_string, $meta_value ); - break; - - case 'BETWEEN' : - case 'NOT BETWEEN' : - $meta_value = array_slice( $meta_value, 0, 2 ); - $where = $wpdb->prepare( '%s AND %s', $meta_value ); - break; - - case 'LIKE' : - case 'NOT LIKE' : - $meta_value = '%' . $wpdb->esc_like( $meta_value ) . '%'; - $where = $wpdb->prepare( '%s', $meta_value ); - break; - - // EXISTS with a value is interpreted as '='. - case 'EXISTS' : - $meta_compare = '='; - $where = $wpdb->prepare( '%s', $meta_value ); - break; - - // 'value' is ignored for NOT EXISTS. - case 'NOT EXISTS' : - $where = ''; - break; - - default : - $where = $wpdb->prepare( '%s', $meta_value ); - break; - - } - - if ( $where ) { - $sql_chunks['where'][] = "CAST($alias.meta_value AS {$meta_type}) {$meta_compare} {$where}"; - } - } + $args = $wp_meta_keys[ $object_type ][ $meta_key ]; - /* - * Multiple WHERE clauses (for meta_key and meta_value) should - * be joined in parentheses. - */ - if ( 1 < count( $sql_chunks['where'] ) ) { - $sql_chunks['where'] = array( '( ' . implode( ' AND ', $sql_chunks['where'] ) . ' )' ); - } - - return $sql_chunks; + if ( isset( $args['sanitize_callback'] ) && is_callable( $args['sanitize_callback'] ) ) { + remove_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'] ); } - /** - * Get a flattened list of sanitized meta clauses. - * - * This array should be used for clause lookup, as when the table alias and CAST type must be determined for - * a value of 'orderby' corresponding to a meta clause. - * - * @since 4.2.0 - * @access public - * - * @return array Meta clauses. - */ - public function get_clauses() { - return $this->clauses; + if ( isset( $args['auth_callback'] ) && is_callable( $args['auth_callback'] ) ) { + remove_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'] ); } - /** - * Identify an existing table alias that is compatible with the current - * query clause. - * - * We avoid unnecessary table joins by allowing each clause to look for - * an existing table alias that is compatible with the query that it - * needs to perform. - * - * An existing alias is compatible if (a) it is a sibling of `$clause` - * (ie, it's under the scope of the same relation), and (b) the combination - * of operator and relation between the clauses allows for a shared table join. - * In the case of {@see WP_Meta_Query}, this only applies to 'IN' clauses that - * are connected by the relation 'OR'. - * - * @since 4.1.0 - * @access protected - * - * @param array $clause Query clause. - * @param array $parent_query Parent query of $clause. - * @return string|bool Table alias if found, otherwise false. - */ - protected function find_compatible_table_alias( $clause, $parent_query ) { - $alias = false; - - foreach ( $parent_query as $sibling ) { - // If the sibling has no alias yet, there's nothing to check. - if ( empty( $sibling['alias'] ) ) { - continue; - } - - // We're only interested in siblings that are first-order clauses. - if ( ! is_array( $sibling ) || ! $this->is_first_order_clause( $sibling ) ) { - continue; - } - - $compatible_compares = array(); - - // Clauses connected by OR can share joins as long as they have "positive" operators. - if ( 'OR' === $parent_query['relation'] ) { - $compatible_compares = array( '=', 'IN', 'BETWEEN', 'LIKE', 'REGEXP', 'RLIKE', '>', '>=', '<', '<=' ); - - // Clauses joined by AND with "negative" operators share a join only if they also share a key. - } elseif ( isset( $sibling['key'] ) && isset( $clause['key'] ) && $sibling['key'] === $clause['key'] ) { - $compatible_compares = array( '!=', 'NOT IN', 'NOT LIKE' ); - } - - $clause_compare = strtoupper( $clause['compare'] ); - $sibling_compare = strtoupper( $sibling['compare'] ); - if ( in_array( $clause_compare, $compatible_compares ) && in_array( $sibling_compare, $compatible_compares ) ) { - $alias = $sibling['alias']; - break; - } - } + unset( $wp_meta_keys[ $object_type ][ $meta_key ] ); - /** - * Filter the table alias identified as compatible with the current clause. - * - * @since 4.1.0 - * - * @param string|bool $alias Table alias, or false if none was found. - * @param array $clause First-order query clause. - * @param array $parent_query Parent of $clause. - * @param object $this WP_Meta_Query object. - */ - return apply_filters( 'meta_query_find_compatible_table_alias', $alias, $clause, $parent_query, $this ) ; + // Do some clean up + if ( empty( $wp_meta_keys[ $object_type ] ) ) { + unset( $wp_meta_keys[ $object_type ] ); } - /** - * Checks whether the current query has any OR relations. - * - * In some cases, the presence of an OR relation somewhere in the query will require - * the use of a `DISTINCT` or `GROUP BY` keyword in the `SELECT` clause. The current - * method can be used in these cases to determine whether such a clause is necessary. - * - * @since 4.3.0 - * - * @return bool True if the query contains any `OR` relations, otherwise false. - */ - public function has_or_relation() { - return $this->has_or_relation; - } + return true; } /** - * Retrieve the name of the metadata table for the specified object type. + * Retrieves a list of registered meta keys for an object type. * - * @since 2.9.0 + * @since 4.6.0 * - * @global wpdb $wpdb WordPress database abstraction object. - * - * @param string $type Type of object to get metadata table for (e.g., comment, post, or user) - * @return string|false Metadata table name, or false if no metadata table exists + * @param string $object_type The type of object. Post, comment, user, term. + * @return array List of registered meta keys. */ -function _get_meta_table($type) { - global $wpdb; +function get_registered_meta_keys( $object_type ) { + global $wp_meta_keys; - $table_name = $type . 'meta'; - - if ( empty($wpdb->$table_name) ) - return false; + if ( ! is_array( $wp_meta_keys ) || ! isset( $wp_meta_keys[ $object_type ] ) ) { + return array(); + } - return $wpdb->$table_name; + return $wp_meta_keys[ $object_type ]; } /** - * Determine whether a meta key is protected. + * Retrieves registered metadata for a specified object. * - * @since 3.1.3 + * @since 4.6.0 * - * @param string $meta_key Meta key - * @param string|null $meta_type - * @return bool True if the key is protected, false otherwise. + * @param string $object_type Type of object to request metadata for. (e.g. comment, post, term, user) + * @param int $object_id ID of the object the metadata is for. + * @param string $meta_key Optional. Registered metadata key. If not specified, retrieve all registered + * metadata for the specified object. + * @return mixed A single value or array of values for a key if specified. An array of all registered keys + * and values for an object ID if not. */ -function is_protected_meta( $meta_key, $meta_type = null ) { - $protected = ( '_' == $meta_key[0] ); +function get_registered_metadata( $object_type, $object_id, $meta_key = '' ) { + if ( ! empty( $meta_key ) ) { + if ( ! registered_meta_key_exists( $object_type, $meta_key ) ) { + return false; + } + $meta_keys = get_registered_meta_keys( $object_type ); + $meta_key_data = $meta_keys[ $meta_key ]; - /** - * Filter whether a meta key is protected. - * - * @since 3.2.0 - * - * @param bool $protected Whether the key is protected. Default false. - * @param string $meta_key Meta key. - * @param string $meta_type Meta type. - */ - return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type ); -} + $data = get_metadata( $object_type, $object_id, $meta_key, $meta_key_data['single'] ); -/** - * Sanitize meta value. - * - * @since 3.1.3 - * - * @param string $meta_key Meta key - * @param mixed $meta_value Meta value to sanitize - * @param string $meta_type Type of meta - * @return mixed Sanitized $meta_value - */ -function sanitize_meta( $meta_key, $meta_value, $meta_type ) { + return $data; + } - /** - * Filter the sanitization of a specific meta key of a specific meta type. - * - * The dynamic portions of the hook name, `$meta_type`, and `$meta_key`, - * refer to the metadata object type (comment, post, or user) and the meta - * key value, - * respectively. - * - * @since 3.3.0 - * - * @param mixed $meta_value Meta value to sanitize. - * @param string $meta_key Meta key. - * @param string $meta_type Meta type. - */ - return apply_filters( "sanitize_{$meta_type}_meta_{$meta_key}", $meta_value, $meta_key, $meta_type ); + $data = get_metadata( $object_type, $object_id ); + + $meta_keys = get_registered_meta_keys( $object_type ); + $registered_data = array(); + + // Someday, array_filter() + foreach ( $meta_keys as $k => $v ) { + if ( isset( $data[ $k ] ) ) { + $registered_data[ $k ] = $data[ $k ]; + } + } + + return $registered_data; } /** - * Register meta key + * Filter out `register_meta()` args based on a whitelist. + * `register_meta()` args may change over time, so requiring the whitelist + * to be explicitly turned off is a warranty seal of sorts. * - * @since 3.3.0 + * @access private + * @since 4.6.0 + * + * @param array $args Arguments from `register_meta()`. + * @param array $default_args Default arguments for `register_meta()`. * - * @param string $meta_type Type of meta - * @param string $meta_key Meta key - * @param string|array $sanitize_callback A function or method to call when sanitizing the value of $meta_key. - * @param string|array $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks. + * @return array Filtered arguments. */ -function register_meta( $meta_type, $meta_key, $sanitize_callback, $auth_callback = null ) { - if ( is_callable( $sanitize_callback ) ) - add_filter( "sanitize_{$meta_type}_meta_{$meta_key}", $sanitize_callback, 10, 3 ); +function _wp_register_meta_args_whitelist( $args, $default_args ) { + $whitelist = array_keys( $default_args ); - if ( empty( $auth_callback ) ) { - if ( is_protected_meta( $meta_key, $meta_type ) ) - $auth_callback = '__return_false'; - else - $auth_callback = '__return_true'; + // In an anonymous function world, this would be better as an array_filter() + foreach ( $args as $key => $value ) { + if ( ! in_array( $key, $whitelist ) ) { + unset( $args[ $key ] ); + } } - if ( is_callable( $auth_callback ) ) - add_filter( "auth_{$meta_type}_meta_{$meta_key}", $auth_callback, 10, 6 ); + return $args; }