Merge the iwtransclusion branch back into trunk

[lhc/web/wiklou.git] / includes / db / Database.php

diff --git a/includes/db/Database.php b/includes/db/Database.php
index be06053..279948f 100644 (file)
--- a/includes/db/Database.php
+++ b/includes/db/Database.php
@@ -1819,6 +1819,39 @@ abstract class DatabaseBase implements DatabaseType {
                }
        }
 
+       /**
+        * Build a partial where clause from a 3-d array
+        * The keys on each level may be either integers or strings.
+        *
+        * @param $data Array: organized as 3-d array(baseKeyVal => array(middleKeyVal => array(subKeyVal => <ignored>, ...), ...), ...)
+        * @param $baseKey String: field name to match the base-level keys to (eg 'gtl_to_prefix')
+        * @param $middleKey String: field name to match the middle-level keys to (eg 'gtl_to_namespace')
+        * @param $subKey String: field name to match the sub-level keys to (eg 'gtl_to_title')
+        * @return Mixed: string SQL fragment, or false if no items in array.
+        */
+       function makeWhereFrom3d( $data, $baseKey, $middleKey, $subKey ) {
+               $conds = array();
+               foreach ( $data as $base => $subdata ) {
+                       foreach ( $subdata as $middle => $sub ) {
+                               if ( count( $sub ) ) {
+                                       $conds[] = $this->makeList(
+                                               array( $baseKey => $base,
+                                                       $middleKey => $middle,
+                                                       $subKey => array_keys( $sub ) ),
+                                               LIST_AND
+                                       );
+                               }
+                       }
+               }
+
+               if ( $conds ) {
+                       return $this->makeList( $conds, LIST_OR );
+               } else {
+                       // Nothing to search for...
+                       return false;
+               }
+       }
+
        /**
         * Bitwise operations
         */