front/stubs/api/chat/index.js

const chatRouter = require('express').Router();

module.exports = chatRouter;

const { getChatFromDB, getUsersChats, addChatToDB } = require('../db');

chatRouter.get('/item/:id1/:id2', (req, res) => {
    const { id1, id2 } = req.params;
    console.log("Request get in /chat:", id1, id2)

    const chat = getChatFromDB(id1, id2);

    if (chat) {
        res.status(200).send({chat});
    } else {
        res.status(404).send({message: 'Chat was not found'});
    }
})

chatRouter.post('/item/:id1/:id2', (req, res) => {
    const { id1, id2 } = req.params;
    console.log("Request post in /chat:", id1, id2)

    const chat = getChatFromDB(id1, id2);

    if (chat) {
        // Chat already exists
        res.status(200).send({chat});
    } else {
        // Creating new chat
        const newChat = {
            id1: id1,
            id2: id2,
            messages: []
        }

        addChatToDB(newChat);

        res.status(200).send({newChat});
    }
})

chatRouter.get('/list/:id', (req, res) => {
    const { id } = req.params;

    console.log("Request get /list in /chat:", id);

    const userChats = getUsersChats(id);

    if (!userChats) {
        res.status(404).send({message: 'Error with retrieving chats'});
    } else {
        res.status(200).send({chats: userChats});
    }
})