feature: add ability to send messages

[tuanthanh2067]

Related issue

Fixes #177, Fixes #72

Type of Change

• Feat: Change which adds functionality/new feature
• Fix: Change which fixes an issue
• Refactor: Change which improves the structure of the code
• Docs: Change which improves documentation

Description

This PR implements Apollo Pubsub which allows users to send and receive messages real time. Messages will be stored in the db.

Demo

Screen.Recording.2022-02-16.at.1.28.21.PM.mov

Frontend

Just like you would use query or mutation, you can call the subscription and get their returned value. The subscription will keep listening for a specific CHANNEL. The channel here is named as followed CHANNEL_{roomId} (CHANNEL_abcd1234).

How to test

• Login, use 2 accounts that are in same room
• One will use subscription just like how we use query and mutation but when being called, it will keeps listening for a CHANNEL name.
• Use the other account to sendMessage using mutation.

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/tuanthanh2067/seeksi/5Qja41vLgjroqoYmCyGKvWvLW79Z
✅ Preview: https://seeksi-git-feature-implement-realtime-chat-tuanthanh2067.vercel.app

[oliver-pham]

Awesome 👏 ! We'll probably have a separate issue to handle sending a photo in a message.