add new files

api/controllers/groupController.js

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+'use strict';
+
+var mongoose = require('mongoose'),
+Group = mongoose.model('Group');
+
+exports.list_all = function(req, res) {
+    Group.find({}, function(err, group) {
+    if (err) {
+        res.send(err);
+    }
+    res.json(group);
+  });
+};
+
+exports.add_group = function(req, res) {
+    var new_group = new Group(req.body);
+    new_group.save(function(err, group) {
+        if (err) {
+            res.send(err);
+        }
+        res.json(group);
+    });
+};

api/controllers/permissionController.js

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+'use strict';
+
+var mongoose = require('mongoose'),
+Permission = mongoose.model('Permission');
+
+exports.add_group = function(req, res) {
+    var new_group = new Permission(req.body);
+    new_group.save(function(err, group) {
+        if (err) {
+            res.send(err);
+        }
+        res.json(group);
+    });
+};

api/models/groupModel.js

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+'use strict';
+
+var mongoose = require('mongoose');
+var Schema = mongoose.Schema;
+
+var GroupSchema = new Schema({
+    // TODO additional fields may be added 
+    name: {
+        type: String
+    },
+    // TODO figure out those two below 
+    permissons:[],
+    users: []
+});
+
+module.exports = mongoose.model('Group', GroupSchema);

api/models/permissionModel.js

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+'use strict';
+
+var mongoose = require('mongoose');
+var Schema = mongoose.Schema;
+
+var PermissionSchema = new Schema({
+    // TODO additional fields may be added 
+    name: {
+        type: String
+    },
+});
+
+module.exports = mongoose.model('Permission', PermissionSchema);