Ticket #20597: comment-query-by-category.patch

wp-includes/comment.php

@@ -222 +222 @@
                         'type' => '',
                         'user_id' => '',
                         'search' => '',
-                        'count' => false
+                        'count' => false,
+                        'cat' => false,
+                        'category__in' => array(),
+                        'category__not_in' => array()
                 );
 
                 $this->query_vars = wp_parse_args( $query_vars, $defaults );
@@ -301 +304 @@
                 else
                         $fields = '*';
 
+                if ( empty( $category__in ) ) {
+                        $category__in = array();
+                }
+                if ( empty( $category__not_in ) ) {
+                        $category__not_in = array();
+                }
+
+                if ( !empty($cat) && '0' != $cat ) {
+                        $cat = ''.urldecode($cat).'';
+                        $cat = addslashes_gpc($cat);
+                        $cat_array = preg_split('/[,\s]+/', $cat);
+                        $cat = '';
+                        $req_cats = array();
+                        foreach ( (array) $cat_array as $cat_id ) {
+                                $cat_id = intval($cat_id);
+                                $req_cats[] = $cat_id;
+                                $in = ($cat_id > 0);
+                                $cat_id = abs($cat_id);
+                                if ( $in ) {
+                                        $category__in[] = $cat_id;
+                                        $category__in = array_merge( $category__in, get_term_children($cat_id, 'category') );
+                                } else {
+                                        $category__not_in[] = $cat_id;
+                                        $category__not_in = array_merge( $category__not_in, get_term_children($cat_id, 'category') );
+                                }
+                        }
+                        $cat = implode(',', $req_cats);
+                }
+
                 $join = '';
                 $where = $approved;
 
@@ -330 +362 @@
                         foreach( $post_fields as $field_name => $field_value )
                                 $where .= $wpdb->prepare( " AND {$wpdb->posts}.{$field_name} = %s", $field_value );
                 }
+                if ( ! empty( $category__in ) || ! empty( $category__not_in ) ) {
+                        if ( empty( $join ) ) {
+                                $join = "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID";
+                        }
+                        $join .= " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id)";
+                        $join .= " INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)";
+                        $where .= " AND $wpdb->term_taxonomy.taxonomy = 'category'";
 
+                        if ( ! empty( $category__in ) ) {
+                                $category__in = array_map( 'absint', array_unique( (array) $category__in ) );
+                                $category__in_query = implode( ',', $category__in );
+                                $where .= $wpdb->prepare( " AND $wpdb->term_taxonomy.term_id IN ($category__in_query)" );
+                        }
+
+                        if ( ! empty( $category__not_in ) ) {
+                                $category__not_in = array_map( 'absint', array_unique( (array) $category__not_in ) );
+                                $category__not_in_query = implode( ',', $category__not_in );
+                                $where .= $wpdb->prepare( " AND $wpdb->term_taxonomy.term_id NOT IN ($category__not_in_query)" );
+                        }
+                }
+
                 $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' );
                 $clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );
                 foreach ( $pieces as $piece )