Add endTime attribute to timer directive.

Author: adieu

app/js/timer.js

@@ -6,6 +6,7 @@ angular.module('timer', [])
       scope: {
         interval: '=interval',
         startTimeAttr: '=startTime',
+        endTimeAttr: '=endTime',
         countdownattr: '=countdown',
         autoStart: '&autoStart'
       },
@@ -24,6 +25,7 @@ angular.module('timer', [])
         }
 
         $scope.startTime = null;
+        $scope.endTime = null;
         $scope.timeoutId = null;
         $scope.countdown = $scope.countdownattr && parseInt($scope.countdownattr, 10) >= 0 ? parseInt($scope.countdownattr, 10) : undefined;
         $scope.isRunning = false;
@@ -48,7 +50,17 @@ angular.module('timer', [])
 
         $scope.start = $element[0].start = function () {
           $scope.startTime = $scope.startTimeAttr ? new Date($scope.startTimeAttr) : new Date();
-          $scope.countdown = $scope.countdownattr && parseInt($scope.countdownattr, 10) > 0 ? parseInt($scope.countdownattr, 10) : undefined;
+          $scope.endTime = $scope.endTimeAttr ? new Date($scope.endTimeAttr) : null;
+          if ($scope.endTime) {
+            var difference = $scope.endTime - new Date();
+            if (difference > 0) {
+              $scope.countdown = difference/1000|0;
+            } else {
+              $scope.countdown = 0;
+            }
+          } else {
+            $scope.countdown = $scope.countdownattr && parseInt($scope.countdownattr, 10) > 0 ? parseInt($scope.countdownattr, 10) : undefined;
+          }
           resetTimeout();
           tick();
         };
@@ -93,7 +105,7 @@ angular.module('timer', [])
           $scope.millis = new Date() - $scope.startTime;
           var adjustment = $scope.millis % 1000;
 
-          if ($scope.countdownattr) {
+          if ($scope.countdownattr || $scope.endTimeAttr) {
             $scope.millis = $scope.countdown * 1000;
           }