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<?php
/**
* /lib/search-tax-query.php
*
* Responsible for converting tax_query parameters to MySQL query restrictions.
*
* @package Relevanssi
* @author Mikko Saari
* @license https://wordpress.org/about/gpl/ GNU General Public License
* @see https://www.relevanssi.com/
*/
/**
* Processes the tax query to formulate a query restriction to the MySQL query.
*
* Tested.
*
* @uses relevanssi_process_tax_query_row()
*
* @param string $tax_query_relation The base tax query relation. Default 'and'.
* @param array $tax_query The tax query array.
*
* @return string The query restrictions for the MySQL query.
*/
function relevanssi_process_tax_query( $tax_query_relation, $tax_query ) {
$query_restrictions = '';
if ( ! isset( $tax_query_relation ) ) {
$tax_query_relation = 'and';
}
$tax_query_relation = relevanssi_strtolower( $tax_query_relation );
$term_tax_ids = array();
$not_term_tax_ids = array();
$and_term_tax_ids = array();
$exist_queries = array();
$is_sub_row = false;
foreach ( $tax_query as $row ) {
if ( isset( $row['terms'] ) || ( isset( $row['operator'] ) && ( 'not exists' === strtolower( $row['operator'] ) || 'exists' === strtolower( $row['operator'] ) ) ) ) {
list( $query_restrictions, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries ) =
relevanssi_process_tax_query_row( $row, $is_sub_row, $tax_query_relation, $query_restrictions, $tax_query_relation, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries );
} else {
$row_tax_query_relation = $tax_query_relation;
if ( isset( $row['relation'] ) ) {
$row_tax_query_relation = relevanssi_strtolower( $row['relation'] );
}
if ( is_array( $row ) ) {
foreach ( $row as $subrow ) {
$is_sub_row = true;
if ( isset( $subrow['terms'] ) ) {
list( $query_restrictions, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries ) =
relevanssi_process_tax_query_row( $subrow, $is_sub_row, $tax_query_relation, $query_restrictions, $row_tax_query_relation, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries );
}
}
if ( 'or' === $row_tax_query_relation ) {
$query_restrictions .= relevanssi_process_term_tax_ids(
$term_tax_ids,
$not_term_tax_ids,
$and_term_tax_ids,
$exist_queries
);
}
}
}
}
if ( 'or' === $tax_query_relation ) {
$query_restrictions .= relevanssi_process_term_tax_ids(
$term_tax_ids,
$not_term_tax_ids,
$and_term_tax_ids,
$exist_queries
);
}
return $query_restrictions;
}
/**
* Processes one tax_query row.
*
* Tested.
*
* @global object $wpdb The WordPress database interface.
*
* @param array $row The tax_query row array.
* @param boolean $is_sub_row True if this is a subrow.
* @param string $global_relation The global tax_query relation (AND or OR).
* @param string $query_restrictions The MySQL query restriction.
* @param string $tax_query_relation The tax_query relation.
* @param array $term_tax_ids Array of term taxonomy IDs.
* @param array $not_term_tax_ids Array of excluded term taxonomy IDs.
* @param array $and_term_tax_ids Array of AND term taxonomy IDs.
* @param array $exist_queries MySQL queries for EXIST subqueries.
*
* @return array Returns an array where the first item is the updated
* $query_restrictions, then $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids
* and $exist_queries.
*/
function relevanssi_process_tax_query_row( $row, $is_sub_row, $global_relation, $query_restrictions, $tax_query_relation, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries ) {
global $wpdb;
$local_term_tax_ids = array();
$local_not_term_tax_ids = array();
$local_and_term_tax_ids = array();
$term_tax_id = array();
$exists_query = false;
if ( isset( $row['operator'] ) && ( 'exists' === strtolower( $row['operator'] ) || 'not exists' === strtolower( $row['operator'] ) ) ) {
$exists_query = true;
}
if ( $exists_query ) {
$row['field'] = 'exists';
}
if ( ! isset( $row['field'] ) ) {
$row['field'] = 'term_id'; // In case 'field' is not set, go with the WP default of 'term_id'.
}
$row['field'] = strtolower( $row['field'] ); // In some cases, you can get 'ID' instead of 'id'.
if ( in_array( $row['field'], array( 'slug', 'name', 'id', 'term_id' ), true ) ) {
$term_tax_id = relevanssi_term_tax_id_from_row( $row );
}
if ( 'term_taxonomy_id' === $row['field'] ) {
if ( ! is_array( $row['terms'] ) ) {
$row['terms'] = array( $row['terms'] );
}
$term_tax_id = array_filter( $row['terms'], 'is_numeric' );
}
if ( ! $exists_query && ( ! isset( $row['include_children'] ) || true === $row['include_children'] ) ) {
foreach ( $term_tax_id as $t_id ) {
$t_term = get_term_by( 'term_taxonomy_id', $t_id, $row['taxonomy'] );
$t_id = $t_term->term_id;
$kids = get_term_children( $t_id, $row['taxonomy'] );
foreach ( $kids as $kid ) {
$kid_term_tax_id = relevanssi_get_term_tax_id( $kid, $row['taxonomy'] );
if ( $kid_term_tax_id ) {
// In some weird cases, this may be null. See: https://wordpress.org/support/topic/childrens-of-chosen-product_cat-not-showing-up/.
$term_tax_id[] = $kid_term_tax_id;
}
}
}
}
$term_tax_id = array_unique( $term_tax_id );
if ( ! empty( $term_tax_id ) ) {
$n = count( $term_tax_id );
$term_tax_id = implode( ',', $term_tax_id );
$tq_operator = 'IN'; // Assuming the default operator "IN", unless something else is provided.
if ( isset( $row['operator'] ) ) {
$tq_operator = strtoupper( $row['operator'] );
}
if ( ! in_array( $tq_operator, array( 'IN', 'NOT IN', 'AND' ), true ) ) {
$tq_operator = 'IN';
}
if ( 'and' === $tax_query_relation ) {
if ( 'AND' === $tq_operator ) {
$query_restrictions .= " AND relevanssi.doc IN (
SELECT ID FROM $wpdb->posts WHERE 1=1
AND (
SELECT COUNT(1)
FROM $wpdb->term_relationships AS tr
WHERE tr.term_taxonomy_id IN ($term_tax_id)
AND tr.object_id = $wpdb->posts.ID ) = $n
)";
// Clean: $term_tax_id and $n are Relevanssi-generated.
} else {
$query_restrictions .= " AND relevanssi.doc $tq_operator (
SELECT DISTINCT(tr.object_id)
FROM $wpdb->term_relationships AS tr
WHERE tr.term_taxonomy_id IN ($term_tax_id))";
// Clean: all variables are Relevanssi-generated.
}
} else {
if ( 'IN' === $tq_operator ) {
$local_term_tax_ids[] = $term_tax_id;
}
if ( 'NOT IN' === $tq_operator ) {
$local_not_term_tax_ids[] = $term_tax_id;
}
if ( 'AND' === $tq_operator ) {
$local_and_term_tax_ids[] = $term_tax_id;
}
}
} else {
global $wp_query;
$wp_query->is_category = false;
}
$copy_term_tax_ids = false;
if ( ! $is_sub_row ) {
$copy_term_tax_ids = true;
}
if ( $is_sub_row && ( 'or' === $global_relation || 'or' === $tax_query_relation ) ) {
$copy_term_tax_ids = true;
}
if ( $copy_term_tax_ids ) {
$term_tax_ids = array_merge( $term_tax_ids, $local_term_tax_ids );
$not_term_tax_ids = array_merge( $not_term_tax_ids, $local_not_term_tax_ids );
$and_term_tax_ids = array_merge( $and_term_tax_ids, $local_and_term_tax_ids );
}
if ( $exists_query ) {
$taxonomy = $row['taxonomy'];
$operator = 'IN';
if ( 'not exists' === strtolower( $row['operator'] ) ) {
$operator = 'NOT IN';
}
$exist_query_sql = " relevanssi.doc $operator (
SELECT DISTINCT(tr.object_id)
FROM $wpdb->term_relationships AS tr, $wpdb->term_taxonomy AS tt
WHERE tr.term_taxonomy_id = tt.term_taxonomy_id
AND tt.taxonomy = '$taxonomy' )";
$exist_queries[] = $exist_query_sql;
if ( 'and' === $tax_query_relation ) {
$query_restrictions .= ' AND ' . $exist_query_sql;
}
}
return array( $query_restrictions, $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries );
}
/**
* Generates query restrictions from the term taxonomy ids.
*
* Combines different term tax ID arrays into a set of query restrictions that can be
* used in an OR query.
*
* @global object $wpdb The WP database interface.
*
* @param array $term_tax_ids The regular terms.
* @param array $not_term_tax_ids The NOT terms.
* @param array $and_term_tax_ids The AND terms.
* @param array $exist_queries The EXIST queries.
*
* @return string The MySQL query restrictions.
*/
function relevanssi_process_term_tax_ids( $term_tax_ids, $not_term_tax_ids, $and_term_tax_ids, $exist_queries ) {
global $wpdb;
$query_restriction_parts = array();
$query_restrictions = '';
$term_tax_ids = array_unique( $term_tax_ids );
if ( count( $term_tax_ids ) > 0 ) {
$term_tax_ids = implode( ',', $term_tax_ids );
$query_restriction_parts[] = " relevanssi.doc IN (
SELECT DISTINCT(tr.object_id)
FROM $wpdb->term_relationships AS tr
WHERE tr.term_taxonomy_id IN ($term_tax_ids)
)";
// Clean: all variables are Relevanssi-generated.
}
if ( count( $not_term_tax_ids ) > 0 ) {
$not_term_tax_ids = implode( ',', $not_term_tax_ids );
$query_restriction_parts[] .= " relevanssi.doc NOT IN (
SELECT DISTINCT(tr.object_id)
FROM $wpdb->term_relationships AS tr
WHERE tr.term_taxonomy_id IN ($not_term_tax_ids)
)";
// Clean: all variables are Relevanssi-generated.
}
if ( count( $and_term_tax_ids ) > 0 ) {
$and_term_tax_ids = implode( ',', $and_term_tax_ids );
$n = count( explode( ',', $and_term_tax_ids ) );
$query_restriction_parts[] .= " relevanssi.doc IN (
SELECT ID FROM $wpdb->posts WHERE 1=1
AND (
SELECT COUNT(1)
FROM $wpdb->term_relationships AS tr
WHERE tr.term_taxonomy_id IN ($and_term_tax_ids)
AND tr.object_id = $wpdb->posts.ID ) = $n
)";
// Clean: all variables are Relevanssi-generated.
}
if ( $exist_queries ) {
$query_restriction_parts = array_merge( $query_restriction_parts, $exist_queries );
}
if ( count( $query_restriction_parts ) > 1 ) {
$query_restrictions .= '(';
}
$query_restrictions .= implode( ' OR', $query_restriction_parts );
if ( count( $query_restriction_parts ) > 1 ) {
$query_restrictions .= ')';
}
if ( $query_restrictions ) {
$query_restrictions = ' AND ' . $query_restrictions;
}
return $query_restrictions;
}
/**
* Gets and sanitizes the taxonomy name and slug parameters.
*
* Checks parameters: if they're numeric, pass them for term_id filtering, otherwise
* sanitize and create a comma-separated list.
*
* @param string $terms_parameter The 'terms' field from the tax_query row.
* @param string $taxonomy The taxonomy name.
* @param string $field_name The field name ('slug', 'name').
*
* @return array An array containing numeric terms and the list of sanitized term
* names.
*/
function relevanssi_get_term_in( $terms_parameter, $taxonomy, $field_name ) {
$numeric_terms = array();
$names = array();
if ( ! is_array( $terms_parameter ) ) {
$terms_parameter = array( $terms_parameter );
}
foreach ( $terms_parameter as $name ) {
$term = get_term_by( $field_name, $name, $taxonomy );
if ( ! $term ) {
if ( ctype_digit( strval( $name ) ) ) {
$numeric_terms[] = $name;
}
} else {
if ( isset( $term->term_id ) && in_array( $field_name, array( 'slug', 'name' ), true ) ) {
$names[] = "'" . esc_sql( $name ) . "'";
} else {
$numeric_terms[] = $name;
}
}
}
return array(
'numeric_terms' => implode( ',', $numeric_terms ),
'term_in' => implode( ',', $names ),
);
}
/**
* Gets the term_tax_id from a row with 'field' set to 'slug' or 'name'.
*
* If the slugs or names are all numeric values, will switch the 'field' parameter
* to 'term_id'.
*
* @param array $row The taxonomy query row.
*
* @return array An array of term taxonomy IDs.
*/
function relevanssi_term_tax_id_from_row( $row ) {
global $wpdb;
$type = $row['field'];
$term_in_results = relevanssi_get_term_in( $row['terms'], $row['taxonomy'], $type );
$numeric_terms = $term_in_results['numeric_terms'];
$term_in = $term_in_results['term_in'];
$term_tax_id = array();
if ( ! empty( $numeric_terms ) ) {
$type = 'term_id';
$term_in = $numeric_terms;
}
if ( ! empty( $term_in ) ) {
$row_taxonomy = sanitize_text_field( $row['taxonomy'] );
$tt_q = "SELECT tt.term_taxonomy_id
FROM $wpdb->term_taxonomy AS tt
LEFT JOIN $wpdb->terms AS t ON (tt.term_id=t.term_id)
WHERE tt.taxonomy = '$row_taxonomy' AND t.$type IN ($term_in)";
// Clean: $row_taxonomy is sanitized, each term in $term_in is sanitized.
$term_tax_id = $wpdb->get_col( $tt_q ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
}
return $term_tax_id;
}