Persist chat messages for 24 hours via mongodb #1553

game plan

• follow dessert tutorial
• Create a new model called ChatMessage in api/main_endpoints/models, the model should have 5 fields, createdAt, expiresAt, chatroomId, userId and text
  • see this link for setting the expiresAt field to 24 hours in the future https://stackoverflow.com/a/67438942
• have the model create an index on the createdAtField and chatroomId fields
  • for creating multiple indices https://stackoverflow.com/a/28024759
• adjust /send to include writing to mongodb with your new collection, specifically the writeMessage function
  

  Clark/api/main_endpoints/routes/Messages.js

  Line 47 in 5f89a18

  router.post('/send', async (req, res) => {

• change /getLatestMessage to return the messages from mongodb on a specific room id, test if this works with postman
  • you can comment out the token verification code to test without authentication
• once the above works, open a pr for just the backend changes
• once the pr is merged, lets move onto calling /getLatestMessage once the user joins a chatroom, so they can load the ongoing messages from users.