-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'.
- * 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' ] )
- $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 );
- }
-
- /**
- * 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 = esc_sql( $type . '_id' );
-
- $join = array();
- $where = array();
-
- foreach ( $this->queries as $k => $q ) {
- $meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
- $meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR';
-
- if ( 'NUMERIC' == $meta_type )
- $meta_type = 'SIGNED';
- elseif ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED' ) ) )
- $meta_type = 'CHAR';
-
- $i = count( $join );
- $alias = $i ? 'mt' . $i : $meta_table;
-
- // Set JOIN
- $join[$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 ( !isset( $q['value'] ) ) {
- if ( empty( $where[$k] ) )
- unset( $join[$i] );
- continue;
- }
-
- $meta_value = $q['value'];
-
- $meta_compare = is_array( $meta_value ) ? 'IN' : '=';
- if ( isset( $q['compare'] ) )
- $meta_compare = strtoupper( $q['compare'] );
-
- if ( ! in_array( $meta_compare, array( '=', '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) )
- $meta_compare = '=';
-
- 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;
-
- return apply_filters_ref_array( 'get_meta_sql', array( compact( 'join', 'where' ), $this->queries, $type, $primary_table, $primary_id_column, $context ) );
- }