# TODOs

## Higher Priority

- Move Development settings from flash to `/data/apps/development/development.properties` (just the "start on boot")
- Move Display settings from flash to `/data/apps/display/display.properties`
- Expose app::Paths to TactilityC
- Call tt::lvgl::isSyncSet after HAL init and show an error (and crash?) when it is not set.
- External app loading: Check the version of Tactility and check ESP target hardware to check for compatibility.
- App packaging
- Create more unit tests for `tactility-core`
- Make a URL handler. Use it for handling local files. Match file types with apps.
- Fix Development service: when no SD card is present, the app fails to install. Consider installing to `/data`
- Refactor `PropertiesFile.cpp` to use `tt::file::readLines()` (see TODO in code)
- Localize all apps

## Lower Priority

- Support hot-plugging SD card (note: this is not possible if they require the CS pin hack)
- Create more unit tests for `tactility`
- Explore LVGL9's FreeRTOS functionality
- CrashHandler: use "corrupted" flag
- CrashHandler: process other types of crashes (WDT?)
- Add a Keyboard setting in `keyboard.properties` to override the behaviour of soft keyboard hiding (e.g. keyboard hardware is present, but the user wants to use a soft keyboard)
- Use GPS time to set/update the current time
- All drivers (e.g. display, touch, etc.) should call stop() in their destructor, or at least assert that they should not be running.
- Fix bug in T-Deck/etc: esp_lvgl_port settings has a large stack size (~9kB) to fix an issue where the T-Deck would get a stackoverflow. This sometimes happens when WiFi is auto-enabled and you open the app while it is still connecting.
- Start using non_null (either via MS GSL, or custom)
- `hal/Configuration.h` defines C function types: Use C++ std::function instead
- Fix system time to not be 1980 (use build year as a minimum). Consider keeping track of the last known time.
- Use std::span or string_view in StringUtils https://youtu.be/FRkJCvHWdwQ?t=2754 
- Mutex: Implement give/take from ISR support (works only for non-recursive ones)
- Extend unPhone power driver: add charging status, usb connection status, etc.
- Create different partition files for different ESP flash size targets (N4, N8, N16, N32)
- T-Deck: Clear screen before turning on blacklight
- T-Deck: Use knob for UI selection?
- Show a warning screen if firmware encryption or secure boot are off when saving WiFi credentials.
- Show a warning screen when a user plugs in the SD card on a device that only supports mounting at boot.
- Scanning SD card for external apps and auto-register them (in a temporary register?)
- Remove flex_flow from app_container in Gui.cpp

# Nice-to-haves

- Considering the lack of callstack debugging for external apps: allow for some debugging to be exposed during a device crash. Apps could report their state (e.g. an integer value) which can be stored during app operation and retrieve after crash. The same can be done for various OS apps and states. We can keep an array of these numbers to keep track of the last X states, to get an idea of what's going on.
- Give external app a different icon. Allow an external app to update their id, icon, type and name once they are running (and persist that info?). Loader will need to be able to find app by (external) location.
- Audio player app
- Audio recording app
- OTA updates
- T-Deck Plus: Create separate board config?
- Support for displays with different DPI. Consider the layer-based system like on Android.
- If present, use LED to show boot/wifi status
- Capacity based on voltage: estimation for various devices uses a linear voltage curve, but it should use some sort of battery discharge curve.
- Statusbar widget to show how much memory is in use?
- Wrapper for lvgl slider widget that shows "+" and "-" buttons, and also the value in a label.
- Files app: copy/paste actions
- On crash, try to save the current log to flash or SD card? (this is risky, though, so ask in Discord first)
- Support more than 1 hardware keyboard (see lvgl::hardware_keyboard_set_indev()). LVGL init currently calls keyboard init, but that part should probably be done from the KeyboardDevice base class.

# App Ideas

- Revisit TinyUSB mouse idea: the bugs related to cleanup seem to be fixed in the library.
- Map widget:
  https://github.com/portapack-mayhem/mayhem-firmware/blob/b66d8b1aa178d8a9cd06436fea788d5d58cb4c8d/firmware/application/ui/ui_geomap.cpp
  https://github.com/portapack-mayhem/mayhem-firmware/blob/b66d8b1aa178d8a9cd06436fea788d5d58cb4c8d/firmware/tools/generate_world_map.bin.py
  https://github.com/portapack-mayhem/mayhem-firmware/releases
- Weather app: https://lab.flipper.net/apps/flip_weather
- wget app: https://lab.flipper.net/apps/web_crawler (add profiles for known public APIs?)
- BlueTooth keyboard app
- Chip 8 emulator
- BadUSB (in December 2024, TinyUSB has a bug where uninstalling and re-installing the driver fails)
- Discord bot
- IR transceiver app
- GPS app
- Investigate CSI https://stevenmhernandez.github.io/ESP32-CSI-Tool/
- Compile unix tools to ELF apps?
- Todo list
- Calendar
- Display touch calibration
