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<?php
/**
* WordPress Query class.
*
* Abstract class for handling advanced queries
*
* @package WordPress
* @since 3.1.0
*/
class WP_Object_Query {
/**
* Query vars, after parsing
*
* @since 3.1.0
* @access public
* @var array
*/
var $query_vars;
/**
* Retrieve query variable.
*
* @since 3.1.0
* @access public
*
* @param string $query_var Query variable key.
* @return mixed
*/
function get( $query_var ) {
if ( isset( $this->query_vars[$query_var] ) )
return $this->query_vars[$query_var];
return '';
}
/**
* Set query variable.
*
* @since 3.1.0
* @access public
*
* @param string $query_var Query variable key.
* @param mixed $value Query variable value.
*/
function set( $query_var, $value ) {
$this->query_vars[ $query_var ] = $value;
}
/*
* Populates the $meta_query property
*
* @access protected
* @since 3.1.0
*
* @param array $qv The query variables
*/
function parse_meta_query( &$qv ) {
$meta_query = array();
// Simple query needs to be first for orderby=meta_value to work correctly
foreach ( array( 'key', 'value', 'compare', 'type' ) as $key ) {
if ( !empty( $qv[ "meta_$key" ] ) )
$meta_query[0][ $key ] = $qv[ "meta_$key" ];
}
if ( !empty( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ) {
$meta_query = array_merge( $meta_query, $qv['meta_query'] );
}
$qv['meta_query'] = $meta_query;
}
/*
* Used internally to generate an SQL string for searching across multiple meta key = value pairs
*
* @access protected
* @since 3.1.0
*
* @param array $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'
*
* @param string $primary_table
* @param string $primary_id_column
* @param string $meta_table
* @param string $meta_id_column
* @return array( $join_sql, $where_sql )
*/
function get_meta_sql( $meta_query, $primary_table, $primary_id_column, $meta_table, $meta_id_column ) {
global $wpdb;
$clauses = array();
$join = '';
$where = '';
$i = 0;
foreach ( $meta_query as $q ) {
$meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
$meta_value = isset( $q['value'] ) ? $q['value'] : '';
$meta_compare = isset( $q['compare'] ) ? strtoupper( $q['compare'] ) : '=';
$meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR';
if ( ! in_array( $meta_compare, array( '=', '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) )
$meta_compare = '=';
if ( 'NUMERIC' == $meta_type )
$meta_type = 'SIGNED';
elseif ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED' ) ) )
$meta_type = 'CHAR';
if ( empty( $meta_key ) && empty( $meta_value ) )
continue;
$alias = $i ? 'mt' . $i : $meta_table;
$join .= "\nINNER JOIN $meta_table";
$join .= $i ? " AS $alias" : '';
$join .= " ON ($primary_table.$primary_id_column = $alias.$meta_id_column)";
$i++;
if ( !empty( $meta_key ) )
$where .= $wpdb->prepare( " AND $alias.meta_key = %s", $meta_key );
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 );
}
if ( empty( $meta_value ) )
continue;
if ( 'IN' == substr( $meta_compare, -2) ) {
$meta_field_types = substr( str_repeat( ',%s', count( $meta_value ) ), 1 );
$meta_compare_string = "($meta_field_types)";
unset( $meta_field_types );
} 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';
}
$where .= $wpdb->prepare( " AND CAST($alias.meta_value AS {$meta_type}) {$meta_compare} {$meta_compare_string}", $meta_value );
unset( $meta_compare_string );
}
return apply_filters( 'get_meta_sql', compact( 'join', 'where' ), $meta_query, $primary_table, $primary_id_column, $meta_table, $meta_id_column );
}
/*
* Used internally to generate an SQL string for searching across multiple taxonomies
*
* @access protected
* @since 3.1.0
*
* @param array $tax_query List of taxonomy queries. A single taxonomy query is an associative array:
* - 'taxonomy' string|array The taxonomy being queried
* - 'terms' string|array The list of terms
* - 'field' string (optional) Which term field is being used.
* Possible values: 'term_id', 'slug' or 'name'
* Default: 'slug'
* - 'operator' string (optional)
* Possible values: 'IN' and 'NOT IN'.
* Default: 'IN'
* - 'include_children' bool (optional) Whether to include child terms.
* Default: true
*
* @param string $object_id_column
* @return string
*/
function get_tax_sql( $tax_query, $object_id_column ) {
global $wpdb;
$sql = array();
foreach ( $tax_query as $query ) {
if ( !isset( $query['include_children'] ) )
$query['include_children'] = true;
$query['do_query'] = false;
$sql_single = get_objects_in_term( $query['terms'], $query['taxonomy'], $query );
if ( empty( $sql_single ) )
return ' AND 0 = 1';
$sql[] = $sql_single;
}
if ( 1 == count( $sql ) ) {
$ids = $wpdb->get_col( $sql[0] );
} else {
$r = "SELECT object_id FROM $wpdb->term_relationships WHERE 1=1";
foreach ( $sql as $query )
$r .= " AND object_id IN ($query)";
$ids = $wpdb->get_col( $r );
}
if ( !empty( $ids ) )
return " AND $object_id_column IN(" . implode( ', ', $ids ) . ")";
else
return ' AND 0 = 1';
}
/*
* Used internally to generate an SQL string for searching across multiple columns
*
* @access protected
* @since 3.1.0
*
* @param string $string
* @param array $cols
* @return string
*/
function get_search_sql( $string, $cols ) {
$string = esc_sql( $string );
$searches = array();
foreach ( $cols as $col )
$searches[] = "$col LIKE '%$string%'";
return ' AND (' . implode(' OR ', $searches) . ')';
}
}
?>
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