feat(client:auth): implement Auth.hasRole

Author: kingcody

app/templates/client/components/auth(auth)/auth.module(js).js

@@ -1,6 +1,7 @@
 'use strict';
 
 angular.module('<%= scriptAppName %>.auth', [
+  '<%= scriptAppName %>.constants',
   'ngCookies'<% if (filters.ngroute) { %>,
   'ngRoute'<% } if (filters.uirouter) { %>,
   'ui.router'<% } %>

app/templates/client/components/auth(auth)/auth.service(js).js

@@ -2,7 +2,7 @@
 
 (function() {
 
-  function AuthService($http, User, $cookies, $q) {
+  function AuthService($http, $cookies, $q, appConfig, User) {
     /**
      * Return a callback or noop function
      *
@@ -13,7 +13,8 @@
       return (angular.isFunction(cb)) ? cb : angular.noop;
     },
 
-    currentUser = {};
+    currentUser = {},
+    userRoles = appConfig.userRoles || [];
 
     if ($cookies.get('token')) {
       currentUser = User.get();
@@ -108,7 +109,8 @@
           return currentUser;
         }
 
-        var value = (currentUser.hasOwnProperty('$promise')) ? currentUser.$promise : currentUser;
+        var value = (currentUser.hasOwnProperty('$promise')) ?
+          currentUser.$promise : currentUser;
         return $q.when(value)
           .then(function(user) {
             safeCb(callback)(user);
@@ -140,25 +142,43 @@
       },
 
        /**
-        * Check if a user is an admin
+        * Check if a user has a specified role or higher
         *   (synchronous|asynchronous)
         *
-        * @param  {Function|*} callback - optional, function(is)
+        * @param  {String}     role     - the role to check against
+        * @param  {Function|*} callback - optional, function(has)
         * @return {Bool|Promise}
         */
-      isAdmin: function(callback) {
-        if (arguments.length === 0) {
-          return currentUser.role === 'admin';
+      hasRole: function(role, callback) {
+        var hasRole = function(r, h) {
+          return userRoles.indexOf(r) >= userRoles.indexOf(h);
+        };
+
+        if (arguments.length < 2) {
+          return hasRole(currentUser.role, role);
         }
 
         return Auth.getCurrentUser(null)
           .then(function(user) {
-            var is = user.role === 'admin';
-            safeCb(callback)(is);
-            return is;
+            var has = (user.hasOwnProperty('role')) ?
+              hasRole(user.role, role) : false;
+            safeCb(callback)(has);
+            return has;
           });
       },
 
+       /**
+        * Check if a user is an admin
+        *   (synchronous|asynchronous)
+        *
+        * @param  {Function|*} callback - optional, function(is)
+        * @return {Bool|Promise}
+        */
+      isAdmin: function() {
+        return Auth.hasRole
+          .apply(Auth, [].concat.apply(['admin'], arguments));
+      },
+
       /**
        * Get auth token
        *