file load/save

[securelyfitz]

build a separate module to handle all file i/o. file i/o can be taken from prototype code, but data format needs to be simplified, perhaps raw text with 1 entry per line? Data that needs to be stored and updated in files for persistence:

• contacts
• cards collected
• username/contact/handle
• settings?

read-only data that should come from files

• game's public key
• strings for all of the game cards
• sprite bmps in /assets

ideally the module will have a few member functions:

• init() will open files and load all data into in-memory structures
• save() will save the r/w files to flash
• reload() might be necessary to load just the r/w files?

there is some state that should be derived from the files and calculated on load:

• current game # based on the highest game # with two cards
• ?

[securelyfitz]

• [x] load game data from csv
• [x] save game data to csv
• [ ] load key from file
• [ ] load username from file
• [x] save username to file
• [x] load current game from file
• [x] save current game to file

[securelyfitz]

everything but crypto done, but there's a separate issue for that, so closing this one.

Note: either circuitpython or the usb host can write files - not both at the same time. See boot.py for more.