akshay1027 / stock-market-simulation-engine Goto Github PK

APIs:

1. CRUD on meta data for companies | Not for users | Private API
2. Read API on stock prise of a company | For users | Public API This API has to update the base prise using some formula.

Frontend:

1. Using Read API, show charts of prise changing for each company.

Todo 3|1|23:

Am able to make the companies but there is some problem with editing the companies. I have sem exam on 7|3|23. I will continue again from that day.

• Solved on 7|1|23

Todo 9|1|23 | Find out the idea

• The adding companies part, private API.
• how I can simulate the data in backend every 1 or 2 seconds once a request is made for a company s stock and stream it to the frontend.
• Then will look to consume it in frontend using some chart library, have made some research on found some libraries, have to try them out!

Create a socket endpoint:

mix phx.gen.socket Stock_exchange

create a channel:

mix phx.gen.channel Company

Websockets:

Request -> Socket -> Channel -> Topic -> Response

Backend features:

• Continously streaming data from backend to frontend using websockets.
• Get company_id through request.
• Using company_id, interact with DB.
• Before streaming data to client, change the data from db and send to client. Getting data from DB has to be done only once to improve performance.
• Add/Assign company_id and stock_prise to socket state so that it can be passed around within phoenix callbacks/handlers.
• Change stock prise in a unpredictable way and stream t0 client

Frontend features:

• Setup flutter and its environment

• Learn how to setup flutter client for websocket

• Consume Phoenicx websocket APIs

• Decide how to stream the incoming data in chart form

• [ ]

• Messages that do not come from GenServer.call/2 or GenServer.cast/2 are handled by the handle_info/2 callback.

16|01|23 || 09:02 PM

• Ideally using company_id, i will get the stock_prise from db in handle_in and send only this stock_prise data to handle_info. That would be best!

16|01|23 || 09:27 PM

• Done, making DB request once in handle, getting the stock_prise, assigning it to socket state, calling a timer, all these in handle_in. In handle_info just pushing the stock_prise to client. Handle_info is called every 2 seconds by the timer in handle_in.

16|01|23 || 11:01 PM

• All backend features done ✨🕉️.