$wgMemc->set( $key, $emptyTags, 300 );
return $emptyTags;
}
+
+ /**
+ * Returns a map of any tags used on the wiki to number of edits
+ * tagged with them, ordered descending by the hitcount.
+ *
+ * @return array Array of string => int
+ */
+ public static function tagUsageStatistics() {
+ $out = array();
+
+ $dbr = wfGetDB( DB_SLAVE );
+ $res = $dbr->select(
+ 'change_tag',
+ array( 'ct_tag', 'hitcount' => 'count(*)' ),
+ array(),
+ __METHOD__,
+ array( 'GROUP BY' => 'ct_tag', 'ORDER BY' => 'hitcount DESC' )
+ );
+
+ foreach ( $res as $row ) {
+ $out[$row->ct_tag] = $row->hitcount;
+ }
+ foreach ( self::listDefinedTags() as $tag ) {
+ if ( !isset( $out[$tag] ) ) {
+ $out[$tag] = 0;
+ }
+ }
+
+ return $out;
+ }
}