Current File : //var/www/tif-dev/wp-content/plugins/relevanssi/lib/compatibility/polylang.php
<?php
/**
* /lib/compatibility/polylang.php
*
* Polylang compatibility features.
*
* @package Relevanssi
* @author Mikko Saari
* @license https://wordpress.org/about/gpl/ GNU General Public License
* @see https://www.relevanssi.com/
*/
add_filter( 'relevanssi_modify_wp_query', 'relevanssi_polylang_filter' );
add_filter( 'relevanssi_where', 'relevanssi_polylang_where_include_terms' );
add_filter( 'relevanssi_hits_filter', 'relevanssi_polylang_term_filter' );
/**
* Removes the Polylang language filters.
*
* If the Polylang allow all option ('relevanssi_polylang_all_languages') is
* enabled this removes the Polylang language filter. By default Polylang
* filters the languages using a taxonomy query.
*
* @param object $query WP_Query object we need to clean up.
*/
function relevanssi_polylang_filter( $query ) {
$polylang_allow_all = get_option( 'relevanssi_polylang_all_languages' );
if ( 'on' === $polylang_allow_all ) {
$ok_queries = array();
if ( ! isset( $query->tax_query ) ) {
// No tax query set, backing off.
return;
}
if ( ! isset( $query->tax_query->queries ) || ! is_array( $query->tax_query->queries ) ) {
// No tax query set, backing off.
return;
}
foreach ( $query->tax_query->queries as $tax_query ) {
if ( isset( $tax_query['taxonomy'] ) && 'language' !== $tax_query['taxonomy'] ) {
// Not a language tax query.
$ok_queries[] = $tax_query;
}
}
$query->tax_query->queries = $ok_queries;
if ( isset( $query->query_vars['tax_query'] ) ) {
// Tax queries can be here as well, so let's sweep this one too.
$ok_queries = array();
foreach ( $query->query_vars['tax_query'] as $tax_query ) {
if ( isset( $tax_query['taxonomy'] ) ) {
if ( 'language' !== $tax_query['taxonomy'] ) {
$ok_queries[] = $tax_query;
}
} else {
// Relation parameter most likely.
$ok_queries[] = $tax_query;
}
}
$query->query_vars['tax_query'] = $ok_queries;
}
if ( isset( $query->query_vars['taxonomy'] ) && 'language' === $query->query_vars['taxonomy'] ) {
// Another way to set the taxonomy.
unset( $query->query_vars['taxonomy'] );
unset( $query->query_vars['term'] );
}
}
return $query;
}
/**
* Allows taxonomy terms in language-restricted searches.
*
* This is a bit of a hack, where the language taxonomy WHERE clause is modified
* on the go to allow all posts with the post ID -1 (which means taxonomy terms
* and users). This may break suddenly in updates, but I haven't come up with a
* better way so far.
*
* @param string $where The WHERE clause to modify.
*
* @return string The WHERE clause with additional filtering included.
*
* @since 2.1.6
*/
function relevanssi_polylang_where_include_terms( $where ) {
global $wpdb;
$current_language = substr( get_locale(), 0, 2 );
if ( function_exists( 'pll_current_language' ) ) {
$current_language = pll_current_language();
}
$languages = get_terms( array( 'taxonomy' => 'language' ) );
$language_id = 0;
foreach ( $languages as $language ) {
if (
! is_wp_error( $language ) &&
$language instanceof WP_Term &&
$language->slug === $current_language
) {
$language_id = intval( $language->term_id );
break;
}
}
// Language ID should now have current language ID.
if ( 0 !== $language_id ) {
// Do a simple search-and-replace to modify the query.
$where = preg_replace( '/\s+/', ' ', $where );
$where = preg_replace( '/\(\s/', '(', $where );
$where = str_replace(
"AND relevanssi.doc IN (SELECT DISTINCT(tr.object_id) FROM {$wpdb->prefix}term_relationships AS tr WHERE tr.term_taxonomy_id IN ($language_id))",
"AND (relevanssi.doc IN ( SELECT DISTINCT(tr.object_id) FROM {$wpdb->prefix}term_relationships AS tr WHERE tr.term_taxonomy_id IN ($language_id)) OR (relevanssi.doc = -1))",
$where
);
}
return $where;
}
/**
* Filters out taxonomy terms in the wrong language.
*
* If all languages are not allowed, this filter goes through the results and
* removes the taxonomy terms in the wrong language. This can't be done in the
* original query because the term language information is slightly hard to
* find.
*
* @param array $hits The found posts are in $hits[0].
*
* @return array The $hits array with the unwanted posts removed.
*
* @since 2.1.6
*/
function relevanssi_polylang_term_filter( $hits ) {
$polylang_allow_all = get_option( 'relevanssi_polylang_all_languages' );
if ( 'on' !== $polylang_allow_all ) {
$current_language = substr( get_locale(), 0, 2 );
if ( function_exists( 'pll_current_language' ) ) {
$current_language = pll_current_language();
}
$accepted_hits = array();
foreach ( $hits[0] as $hit ) {
$original_hit = $hit;
if ( is_numeric( $hit ) ) {
// In case "fields" is set to "ids", fetch the post object we need.
$original_hit = $hit;
$hit = get_post( $hit );
}
if ( ! isset( $hit->post_content ) && isset( $hit->ID ) ) {
// The "fields" is set to "id=>parent".
$original_hit = $hit;
$hit = get_post( $hit->ID );
}
if ( isset( $hit->ID ) && -1 === $hit->ID && isset( $hit->term_id ) ) {
$term_id = intval( $hit->term_id );
$translations = pll_get_term_translations( $term_id );
if (
isset( $translations[ $current_language ] ) &&
$translations[ $current_language ] === $term_id
) {
$accepted_hits[] = $original_hit;
}
} else {
$accepted_hits[] = $original_hit;
}
}
$hits[0] = $accepted_hits;
}
return $hits;
}
/**
* Returns the term_taxonomy_id matching the Polylang language based on locale.
*
* @param string $locale The locale string for the language.
*
* @return int The term_taxonomy_id for the language; 0 if nothing is found.
*/
function relevanssi_get_language_term_taxonomy_id( $locale ) {
global $wpdb, $relevanssi_language_term_ids;
if ( isset( $relevanssi_language_term_ids[ $locale ] ) ) {
return $relevanssi_language_term_ids[ $locale ];
}
$languages = $wpdb->get_results(
"SELECT term_taxonomy_id, description FROM $wpdb->term_taxonomy " .
"WHERE taxonomy = 'language'"
);
$term_id = 0;
foreach ( $languages as $row ) {
$description = unserialize( $row->description ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions
if ( $description['locale'] === $locale ) {
$term_id = $row->term_taxonomy_id;
break;
}
}
$relevanssi_language_term_ids[ $locale ] = $term_id;
return $term_id;
}
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