Code cleanup part #1: move all the services and directive JS code in the app.js file into its own files

static/js/services/angular-helper.js

@@ -0,0 +1,42 @@
+/**
+ * Helper code for working with angular.
+ */
+angular.module('quay').factory('AngularHelper', [function() {
+  var helper = {};
+
+  helper.buildConditionalLinker = function($animate, name, evaluator) {
+    // Based off of a solution found here: http://stackoverflow.com/questions/20325480/angularjs-whats-the-best-practice-to-add-ngif-to-a-directive-programmatically
+    return function ($scope, $element, $attr, ctrl, $transclude) {
+      var block;
+      var childScope;
+      var roles;
+
+      $attr.$observe(name, function (value) {
+        if (evaluator($scope.$eval(value))) {
+          if (!childScope) {
+            childScope = $scope.$new();
+            $transclude(childScope, function (clone) {
+              block = {
+                startNode: clone[0],
+                endNode: clone[clone.length++] = document.createComment(' end ' + name + ': ' + $attr[name] + ' ')
+              };
+              $animate.enter(clone, $element.parent(), $element);
+            });
+          }
+        } else {
+          if (childScope) {
+            childScope.$destroy();
+            childScope = null;
+          }
+
+          if (block) {
+            $animate.leave(getBlockElements(block));
+            block = null;
+          }
+        }
+      });
+    }
+  };
+
+  return helper;
+}]);