AsyncStorage about ihc-wellness-app HOT 1 CLOSED

Add the AsyncStorage backend for the check-in.

On the check-in page, add a stub button that can add an object (contents don't matter, can be hardcoded) to an array value saved in AsyncStorage at key of date.
i.e. for January 5th, 2020
"2020-01-05": {
"sleepHours": 8,
"mood": 8,
"journal": "Feeling happy today"
}
Keep the backend logic out of the CheckinPage file, keep it in a backend-specific file.

Stretch goal 1: when the button is pressed, save that a response has been sent for the day so we can disallow the user to send another response, or only allow the user to update their single response for the day.
i.e. save in key "lastCheckin": "2020-01-05" (update value/overwrite previous value)

Stretch goal 2: when the button is pressed, after the object is created at the key, add its key date to an array at key "checkins", i.e.
"checkins": ["2019-01-02", "2019-01-03", "2019-01-05"]
to allow for faster iteration of previous checkins (get array, then choose keys to lookup).

from ihc-wellness-app.