Fix renaming using parenthesis

lib/helper.php

@@ -660,11 +660,27 @@ class OC_Helper {
 		}
 
 		$newpath = $path . '/' . $filename;
-		$counter = 2;
-		while ($view->file_exists($newpath)) {
-			$newname = $name . ' (' . $counter . ')' . $ext;
-			$newpath = $path . '/' . $newname;
-			$counter++;
+		if ($view->file_exists($newpath)) {
+			if(preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) {
+				//Replace the last "(number)" with "(number+1)" 
+				$last_match = count($matches[0])-1;
+				$counter = $matches[1][$last_match][0]+1;
+				$offset = $matches[0][$last_match][1];
+				$match_length = strlen($matches[0][$last_match][0]);
+			} else {
+				$counter = 2;
+				$offset = false;
+			}
+			do {
+				if($offset) {
+					//Replace the last "(number)" with "(number+1)" 
+					$newname = substr_replace($name, '('.$counter.')', $offset, $match_length);
+				} else {
+					$newname = $name . ' (' . $counter . ')';
+				}
+				$newpath = $path . '/' . $newname . $ext;
+				$counter++;
+			} while ($view->file_exists($newpath));
 		}
 
 		return $newpath;

tests/lib/helper.php

@@ -154,38 +154,56 @@ class Test_Helper extends PHPUnit_Framework_TestCase {
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename.ext exists
 		$this->assertEquals('dir/filename (2).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename.ext', $viewMock));
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename.ext exists
 		$viewMock->expects($this->at(1))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename (2).ext exists
 		$this->assertEquals('dir/filename (3).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename.ext', $viewMock));
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename (1).ext exists
 		$this->assertEquals('dir/filename (2).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename (1).ext', $viewMock));
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename (2).ext exists
+		$this->assertEquals('dir/filename (3).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename (2).ext', $viewMock));
+
+		$viewMock->expects($this->at(0))
+			->method('file_exists')
+			->will($this->returnValue(true)); // filename (2).ext exists
 		$viewMock->expects($this->at(1))
 			->method('file_exists')
-			->will($this->returnValue(true));
-		$this->assertEquals('dir/filename (3).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename (2).ext', $viewMock));
+			->will($this->returnValue(true)); // filename (3).ext exists
+		$this->assertEquals('dir/filename (4).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename (2).ext', $viewMock));
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename(1).ext exists
 		$this->assertEquals('dir/filename(2).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename(1).ext', $viewMock));
 
 		$viewMock->expects($this->at(0))
 			->method('file_exists')
-			->will($this->returnValue(true));
+			->will($this->returnValue(true)); // filename(1) (1).ext exists
 		$this->assertEquals('dir/filename(1) (2).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename(1) (1).ext', $viewMock));
+
+		$viewMock->expects($this->at(0))
+			->method('file_exists')
+			->will($this->returnValue(true)); // filename(1) (1).ext exists
+		$viewMock->expects($this->at(1))
+			->method('file_exists')
+			->will($this->returnValue(true)); // filename(1) (2).ext exists
+		$this->assertEquals('dir/filename(1) (3).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename(1) (1).ext', $viewMock));
+
+		$viewMock->expects($this->at(0))
+			->method('file_exists')
+			->will($this->returnValue(true)); // filename(1) (2) (3).ext exists
+		$this->assertEquals('dir/filename(1) (2) (4).ext', OC_Helper::buildNotExistingFileNameForView('dir', 'filename(1) (2) (3).ext', $viewMock));
 	}
 }