# SPECS — Nils' MG4

Journal for this fork of [fatihdonmezdev/FatihsMG4](https://github.com/fatihdonmezdev/FatihsMG4):
what has been changed, and what is still to do.

- Our repository: https://git.stinnesbeck.com/nils/mg4
- Upstream: https://github.com/fatihdonmezdev/FatihsMG4 (itself a fork of malys / EVABRPUploader
  and Leon Kernan / ABRP_Uploader). Credited in the app's About dialog.

## To do

- [ ] **About dialog link and QR code → https://git.stinnesbeck.com/nils/mg4.**
      Both come from `REPOSITORY_URL` in `app/src/main/java/com/evsuite/abrp/MainActivity.java`
      and `about_repository` in `app/src/main/res/values/strings.xml`. They still point to Fatih's
      GitHub repository.
- [ ] **Re-enable OTA updates against our own releases.** `RELEASES_API` in
      `app/src/unstable/java/com/evsuite/abrp/OtaUpdater.java` points at `updates.invalid` on purpose,
      so checks fail. The updater speaks the GitHub releases API and only allows GitHub hosts
      (`ALLOWED_HOSTS`). For git.stinnesbeck.com it needs the host on the allowlist, and the
      response parsing checked against that server's releases API. Release assets must be named
      `NilsMG4-unstable-<version>.apk` with a `.sha256` sidecar (`build-car` writes both).
- [ ] **Fix the unit tests.** They don't compile upstream: `AbrpApiTest`, `TelemetryPayloadTest`
      and others still use `AbrpApi`/`TelemetryPayload`, which upstream commit `ea8032a` deleted.
- [ ] **Charging currency.** Prices and costs are shown in Turkish lira (`₺/kWh`, `₺`) in
      `pane_charging.xml` and `MainActivity.java`.
- [ ] **Cloud consumption sync.** `CONSUMPTION_INSTALLATION_ID` in `app/build.gradle` is a fixed
      UUID inherited from upstream. Set our own before configuring `CONSUMPTION_API_URL` /
      `CONSUMPTION_API_TOKEN`, so our data cannot land under upstream's id.
- [ ] **Translate the rest.** The `web/` dashboard (Next.js) and docs (`CHANGELOG.md`, `OTA.md`'s
      message table, comments in `mise.toml`/`app/build.gradle`) are still Turkish or French.
- [ ] **Docs still use the old package ID.** `README.md`, `OTA.md`, `CHANGELOG.md`, `mise.toml` and
      `docs/MG4_PLATFORM_INSTALL.md` refer to `com.evsuite.abrp(.unstable)` and `FatihsMG4-*.apk`.
- [ ] **Move hardcoded UI strings into `strings.xml`.** Many are inline in Java and layouts.

## Done

- 2026-10-17 — Translated the app UI from Turkish to English.
- 2026-10-17 — Nix flake: `nix develop` provides JDK 21 and the Android SDK. `build-car` builds the
  unstable APK and signs it with the AOSP test platform key, which the MG4 head unit uses
  (cert SHA-256 `c8a2e9bc…192ab8`).
- 2026-10-17 — OTA update checks disabled by pointing at an unresolvable host (see To do).
- 2026-10-17 — Renamed to "Nils' MG4": package ID `com.stinnesbeck.nilsmg4` (`.unstable` for the car
  build), APK names `NilsMG4-*.apk`. It installs next to the old FatihsMG4 app instead of replacing
  it, and starts with empty settings and history.

## Installing on the car

```
nix develop
build-car
adb push build/car/NilsMG4-unstable-<version>.apk /data/local/tmp/update.apk
adb shell "pm install -r -f -d -t /data/local/tmp/update.apk"
```

To remove the old upstream app: `adb uninstall com.evsuite.abrp.unstable`.