on filtering the share box users and groups whose name begins with the search...

on filtering the share box users and groups whose name begins with the search term shall appear on top, fixes #6430

core/ajax/share.php

@@ -354,8 +354,32 @@ if (isset($_POST['action']) && isset($_POST['itemType']) && isset($_POST['itemSo
 						break;
 					}
 				}
+				usort($shareWith, 'sortSearchFirst');
 				OC_JSON::success(array('data' => $shareWith));
 			}
 			break;
 	}
 }
+
+
+/**
+ * User and Group names matching the search term at the beginning shall appear
+ * on top of the share dialog.
+ * Callback function for usort. http://php.net/usort
+ */
+function sortSearchFirst($a, $b) {
+	$enc = 'UTF-8';
+	$nameA = mb_strtolower($a['label'], $enc);
+	$nameB = mb_strtolower($b['label'], $enc);
+	$term = mb_strtolower($_GET['search'], $enc);
+	$i = mb_strpos($nameA, $term, 0, 'UTF-8');
+	$j = mb_strpos($nameB, $term, 0, 'UTF-8');
+
+	if($i === $j) {
+		return 0;
+	} else if ($i === 0) {
+		return -1;
+	} else {
+		return 1;
+	}
+}