chats and messages

stubs/api/chat/index.js

@@ -2,11 +2,17 @@ const chatRouter = require('express').Router();
 
 module.exports = chatRouter;
 
-const { getChatFromDB, getUsersChats, addChatToDB, getUserFromDB } = require('../db');
+const { getChatFromDB, getUsersChats, addChatToDB, getUserFromDB,
+    addMessageToChat} = require('../db');
 
 chatRouter.get('/item/:id1/:id2', (req, res) => {
     const { id1, id2 } = req.params;
-    console.log("Request get in /chat:", id1, id2)
+    console.log("Request get in /chat:", id1, id2);
+
+    if (id1 === id2) {
+        res.status(400).send({message: 'Ids should be different'});
+        return;
+    }
 
     const chat = getChatFromDB(id1, id2);
 
@@ -19,7 +25,12 @@ chatRouter.get('/item/:id1/:id2', (req, res) => {
 
 chatRouter.post('/item/:id1/:id2', (req, res) => {
     const { id1, id2 } = req.params;
-    console.log("Request post in /chat:", id1, id2)
+    console.log("Request post in /chat:", id1, id2);
+
+    if (id1 === id2) {
+        res.status(400).send({message: 'Ids should be different'});
+        return;
+    }
 
     const chat = getChatFromDB(id1, id2);
 
@@ -57,3 +68,24 @@ chatRouter.get('/list/:id', (req, res) => {
         res.status(200).send({chats: userChats});
     }
 })
+
+chatRouter.post('/message/:sender/:receiver', (req, res) => {
+    const { sender, receiver } = req.params;
+    const { message } = req.body;
+    console.log("Request post /message in /chat:", sender, receiver, message);
+
+    const chat = getChatFromDB(sender, receiver);
+
+    if (!chat) {
+        // Chat already exists
+        res.status(400).send({message: "Such chat does not exist"});
+    } else {
+        if (!getUserFromDB(sender) || !getUserFromDB(receiver)) {
+            res.status(404).send({message: 'Such people do not exist'});
+        } else {
+            // Add new message
+            addMessageToChat(chat, message);
+            res.status(200).send({});
+        }
+    }
+})