-class WP_Meta_Query {
- /**
- * List of metadata queries. A single query is an associative array:
- * - 'key' string The meta key
- * - 'value' string|array The meta value
- * - 'compare' (optional) string How to compare the key to the value.
- * Possible values: '=', '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN',
- * 'BETWEEN', 'NOT BETWEEN', 'REGEXP', 'NOT REGEXP', 'RLIKE'.
- * Default: '='
- * - 'type' string (optional) The type of the value.
- * Possible values: 'NUMERIC', 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED'.
- * Default: 'CHAR'
- *
- * @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;
-
- /**
- * Constructor
- *
- * @param array $meta_query (optional) A meta query
- */
- 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 = array();
-
- foreach ( $meta_query as $key => $query ) {
- if ( ! is_array( $query ) )
- continue;
-
- $this->queries[] = $query;
- }
- }
-
- /**
- * Constructs a meta query based on 'meta_*' query vars
- *
- * @since 3.2.0
- * @access public
- *
- * @param array $qv The query variables
- */
- function parse_query_vars( $qv ) {
- $meta_query = array();
-
- // Simple query needs to be first for orderby=meta_value to work correctly
- foreach ( array( 'key', 'compare', 'type' ) as $key ) {
- if ( !empty( $qv[ "meta_$key" ] ) )
- $meta_query[0][ $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' ] ) )
- $meta_query[0]['value'] = $qv[ 'meta_value' ];
-
- if ( !empty( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ) {
- $meta_query = array_merge( $meta_query, $qv['meta_query'] );
- }
-
- $this->__construct( $meta_query );
- }
-
- /**
- * Given a meta type, return the appropriate alias if applicable
- *
- * @since 3.7.0
- *
- * @param string $type MySQL type to cast meta_value
- * @return string MySQL type
- */
- 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;
- }
-
- /**
- * Generates SQL clauses to be appended to a main query.
- *
- * @since 3.2.0
- * @access public
- *
- * @param string $type Type of meta
- * @param string $primary_table
- * @param string $primary_id_column
- * @param object $context (optional) The main query object
- * @return array( 'join' => $join_sql, 'where' => $where_sql )
- */
- function get_sql( $type, $primary_table, $primary_id_column, $context = null ) {
- global $wpdb;
-
- if ( ! $meta_table = _get_meta_table( $type ) )
- return false;
-
- $meta_id_column = sanitize_key( $type . '_id' );
-
- $join = array();
- $where = array();
-
- $key_only_queries = array();
- $queries = array();
-
- // Split out the queries with empty arrays as value
- foreach ( $this->queries as $k => $q ) {
- if ( isset( $q['value'] ) && is_array( $q['value'] ) && empty( $q['value'] ) ) {
- $key_only_queries[$k] = $q;
- unset( $this->queries[$k] );
- }
- }
-
- // Split out the meta_key only queries (we can only do this for OR)
- if ( 'OR' == $this->relation ) {
- foreach ( $this->queries as $k => $q ) {
- if ( ( empty( $q['compare'] ) || 'NOT EXISTS' != $q['compare'] ) && ! array_key_exists( 'value', $q ) && ! empty( $q['key'] ) )
- $key_only_queries[$k] = $q;
- else
- $queries[$k] = $q;
- }
- } else {
- $queries = $this->queries;
- }
-
- // Specify all the meta_key only queries in one go
- if ( $key_only_queries ) {
- $join[] = "INNER JOIN $meta_table ON $primary_table.$primary_id_column = $meta_table.$meta_id_column";
-
- foreach ( $key_only_queries as $key => $q )
- $where["key-only-$key"] = $wpdb->prepare( "$meta_table.meta_key = %s", trim( $q['key'] ) );
- }
-
- foreach ( $queries as $k => $q ) {
- $meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
- $meta_type = $this->get_cast_for_type( isset( $q['type'] ) ? $q['type'] : '' );
-
- if ( array_key_exists( 'value', $q ) && is_null( $q['value'] ) )
- $q['value'] = '';
-
- $meta_value = isset( $q['value'] ) ? $q['value'] : null;
-
- if ( isset( $q['compare'] ) )
- $meta_compare = strtoupper( $q['compare'] );
- else
- $meta_compare = is_array( $meta_value ) ? 'IN' : '=';
-
- if ( ! in_array( $meta_compare, array(
- '=', '!=', '>', '>=', '<', '<=',
- 'LIKE', 'NOT LIKE',
- 'IN', 'NOT IN',
- 'BETWEEN', 'NOT BETWEEN',
- 'NOT EXISTS',
- 'REGEXP', 'NOT REGEXP', 'RLIKE'
- ) ) )
- $meta_compare = '=';
-
- $i = count( $join );
- $alias = $i ? 'mt' . $i : $meta_table;
-
- if ( 'NOT EXISTS' == $meta_compare ) {
- $join[$i] = "LEFT JOIN $meta_table";
- $join[$i] .= $i ? " AS $alias" : '';
- $join[$i] .= " ON ($primary_table.$primary_id_column = $alias.$meta_id_column AND $alias.meta_key = '$meta_key')";
-
- $where[$k] = ' ' . $alias . '.' . $meta_id_column . ' IS NULL';
-
- continue;
- }
-
- $join[$i] = "INNER JOIN $meta_table";
- $join[$i] .= $i ? " AS $alias" : '';
- $join[$i] .= " ON ($primary_table.$primary_id_column = $alias.$meta_id_column)";
-
- $where[$k] = '';
- if ( !empty( $meta_key ) )
- $where[$k] = $wpdb->prepare( "$alias.meta_key = %s", $meta_key );
-
- if ( is_null( $meta_value ) ) {
- if ( empty( $where[$k] ) )
- unset( $join[$i] );
- continue;
- }
-
- if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) {
- if ( ! is_array( $meta_value ) )
- $meta_value = preg_split( '/[,\s]+/', $meta_value );
-
- if ( empty( $meta_value ) ) {
- unset( $join[$i] );
- continue;
- }
- } else {
- $meta_value = trim( $meta_value );
- }
-
- if ( 'IN' == substr( $meta_compare, -2) ) {
- $meta_compare_string = '(' . substr( str_repeat( ',%s', count( $meta_value ) ), 1 ) . ')';
- } elseif ( 'BETWEEN' == substr( $meta_compare, -7) ) {
- $meta_value = array_slice( $meta_value, 0, 2 );
- $meta_compare_string = '%s AND %s';
- } elseif ( 'LIKE' == substr( $meta_compare, -4 ) ) {
- $meta_value = '%' . like_escape( $meta_value ) . '%';
- $meta_compare_string = '%s';
- } else {
- $meta_compare_string = '%s';
- }
-
- if ( ! empty( $where[$k] ) )
- $where[$k] .= ' AND ';
-
- $where[$k] = ' (' . $where[$k] . $wpdb->prepare( "CAST($alias.meta_value AS {$meta_type}) {$meta_compare} {$meta_compare_string})", $meta_value );
- }
-
- $where = array_filter( $where );
-
- if ( empty( $where ) )
- $where = '';
- else
- $where = ' AND (' . implode( "\n{$this->relation} ", $where ) . ' )';
-
- $join = implode( "\n", $join );
- if ( ! empty( $join ) )
- $join = ' ' . $join;
-
- /**
- * Filter the meta query's generated SQL.
- *
- * @since 3.1.0
- *
- * @param array $args {
- * An array of 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( compact( 'join', 'where' ), $this->queries, $type, $primary_table, $primary_id_column, $context ) );
- }