A number dialer app that lets users dial down a list of phone numbers

Test number dials

13018040009 19842068287 15512459377 19362072765 18582210308 13018040009 19842068287 15512459377 19362072765

Backend

GET /calls

• Initialize an array of call objects, [{phoneNum: "1309...", "id": null, "status": "idle"}]
• Return this array to user as a json string

POST /calls

• Initialize the calls if they are not in progress

Max calls of three logic

The status will either be the literal string "ringing", "answered", or "completed".

• We start with array of 10 numbers
• Limit of maximum 3 simultaneous calls
• Start the first three calls immediately with a loop
  • Shift 3 times, and make calls for each

Webhook endpoint POST /webhook

• Receives the post request from NumberDial api
• Find the call object with given id from the array of call ojbects,
  • update its status
  • if the status is "completed"
    • if the length of the array > 0, make a call with the next number in line

Frontend

Phone calls list

• useState for storing phone call objects as array of objects
• useEffect with setInterval to make a call to the GET /calls endpoint initially and periodically
• Display the phone calls in a list

Call button

• Makes a call to the POST /calls endpoint, and hide the button