feat(follow): follow & unfollow in userinfo page

modules/users/server/controllers/users/users.profile.server.controller.js

@@ -144,7 +144,7 @@ exports.changeProfilePicture = function (req, res) {
       if (existingImageUrl !== User.schema.path('profileImageURL').defaultValue) {
         if (useS3Storage) {
           try {
-            var { region, bucket, key } = amazonS3URI(existingImageUrl);
+            var {region, bucket, key} = amazonS3URI(existingImageUrl);
             var params = {
               Bucket: config.aws.s3.bucket,
               Key: key
@@ -292,3 +292,39 @@ exports.unIdle = function (req, res, next) {
     });
   }
 };
+
+/**
+ * followTo
+ * @param req
+ * @param res
+ */
+exports.followTo = function (req, res) {
+  var user = req.user;
+  var toUser = req.model;
+
+  toUser.followers.push(user._id);
+  toUser.save();
+
+  user.following.push(toUser._id);
+  user.save(function (err) {
+    res.json(user);
+  });
+};
+
+/**
+ * unFollowTo
+ * @param req
+ * @param res
+ */
+exports.unFollowTo = function (req, res) {
+  var user = req.user;
+  var toUser = req.model;
+
+  toUser.followers.pull(user._id);
+  toUser.save();
+
+  user.following.pull(toUser._id);
+  user.save(function (err) {
+    res.json(user);
+  });
+};