Added validation for correct timespans when using panel timeshift or relative…

Added validation for correct timespans when using panel timeshift or relative time override, Fixes #1494

src/app/components/kbn.js

@@ -197,6 +197,11 @@ function($, _, moment) {
     return kbn.parseDateMath(mathString, time);
   };
 
+  kbn._timespanRegex = /^\d+[h,m,M,w,s,H,d]$/;
+  kbn.isValidTimeSpan = function(str) {
+    return kbn._timespanRegex.test(str);
+  };
+
   kbn.parseDateMath = function(mathString, time, roundUp) {
     var dateTime = moment(time);
     for (var i = 0; i < mathString.length;) {

src/app/panels/graph/module.js

@@ -123,14 +123,16 @@ function (angular, app, $, _, kbn, moment, TimeSeries, PanelMeta) {
       $scope.render();
     };
 
-    $scope.updateTimeRange = function () {
-      $scope.range = timeSrv.timeRange();
-      $scope.rangeUnparsed = timeSrv.timeRange(false);
-
-      $scope.panelMeta.timeInfo = "";
+    $scope.applyPanelTimeOverrides = function() {
+      $scope.panelMeta.timeInfo = '';
 
       // check panel time overrrides
       if ($scope.panel.timeFrom) {
+        if (!kbn.isValidTimeSpan($scope.panel.timeFrom)) {
+          $scope.panelMeta.timeInfo = 'invalid time override';
+          return;
+        }
+
         if (_.isString($scope.rangeUnparsed.from)) {
           $scope.panelMeta.timeInfo = "last " + $scope.panel.timeFrom;
           $scope.rangeUnparsed.from = 'now-' + $scope.panel.timeFrom;
@@ -139,12 +141,24 @@ function (angular, app, $, _, kbn, moment, TimeSeries, PanelMeta) {
       }
 
       if ($scope.panel.timeShift) {
+        if (!kbn.isValidTimeSpan($scope.panel.timeFrom)) {
+          $scope.panelMeta.timeInfo = 'invalid timeshift';
+          return;
+        }
+
         var timeShift = '-' + $scope.panel.timeShift;
         $scope.panelMeta.timeInfo += ' timeshift ' + timeShift;
         $scope.range.from = kbn.parseDateMath(timeShift, $scope.range.from);
         $scope.range.to = kbn.parseDateMath(timeShift, $scope.range.to);
+
         $scope.rangeUnparsed = $scope.range;
       }
+    };
+
+    $scope.updateTimeRange = function () {
+      $scope.range = timeSrv.timeRange();
+      $scope.rangeUnparsed = timeSrv.timeRange(false);
+      $scope.applyPanelTimeOverrides();
 
       if ($scope.panel.maxDataPoints) {
         $scope.resolution = $scope.panel.maxDataPoints;

src/test/specs/kbn-format-specs.js

@@ -74,10 +74,17 @@ define([
       var date = kbn.parseDateMath('-2d', new Date(2014,1,5));
       expect(date.getTime()).to.equal(new Date(2014, 1, 3).getTime());
     });
+
     it('should handle multiple math expressions', function() {
       var date = kbn.parseDateMath('-2d-6h', new Date(2014, 1, 5));
       expect(date.toString()).to.equal(new Date(2014, 1, 2, 18).toString());
     });
+
+    it('should return false when invalid expression', function() {
+      var date = kbn.parseDateMath('2', new Date(2014, 1, 5));
+      expect(date).to.equal(false);
+    });
+
   });
 
 });