models: boards: add PUT members entry point

Allows to change the members from the API.

models/boards.js

@@ -276,6 +276,10 @@ Boards.helpers({
     return Users.find({ _id: { $in: _.pluck(this.members, 'userId') } });
   },
 
+  getMember(id) {
+    return _.findWhere(this.members, { userId: id });
+  },
+
   getLabel(name, color) {
     return _.findWhere(this.labels, { name, color });
   },
@@ -841,6 +845,34 @@ if (Meteor.isServer) {
     }
   });
 
+  JsonRoutes.add('PUT', '/api/boards/:boardId/members', function (req, res) {
+    Authentication.checkUserId(req.userId);
+    try {
+      const boardId = req.params.boardId;
+      const board = Boards.findOne({ _id: boardId });
+      const userId = req.body.userId;
+      const user = Users.findOne({ _id: userId });
+
+      if (!board.getMember(userId)) {
+        user.addInvite(boardId);
+        board.addMember(userId);
+        JsonRoutes.sendResult(res, {
+          code: 200,
+          data: id,
+        });
+      } else {
+        JsonRoutes.sendResult(res, {
+          code: 200,
+        });
+      }
+    }
+    catch (error) {
+      JsonRoutes.sendResult(res, {
+        data: error,
+      });
+    }
+  });
+
   JsonRoutes.add('POST', '/api/boards', function (req, res) {
     try {
       Authentication.checkUserId(req.userId);