diet-guard/app
Krzysztof kuhy Rudnicki e07284d3e1 Show weekly and monthly average intake on both devices
The calendar already said which individual days went over budget, but not
whether the week as a whole did. A run of small overages reads as four
harmless yellow squares; averaged, it is the thing that actually moves the
needle.

Three rules are load-bearing, and are documented in CLAUDE.md because getting
any of them wrong silently changes what "under budget" means:

- The denominator is logged days, not elapsed days. An unlogged day is not a
  zero-kcal day, and averaging gaps in as zeros would make a badly-tracked
  week look like the best week of the year.
- The yardstick is the mean of the per-day budgets over those same days,
  resolved through BudgetSchedule -- never today's budget, which would
  retroactively reclassify past weeks on every budget edit.
- Today is excluded. A half-logged today drags the mean far enough to flip
  the band, so every period ends at yesterday.

Band boundaries reuse the calendar's own OVER_BUDGET_YELLOW_CEILING by
import rather than by copy, so a period and its days can never disagree
about what "over" means; that constant loses its underscore to say so.

The MCP get_averages tool returns the average and the band but drops the
average budget, keeping the module's existing invariant that the budget
number never leaves this machine. The CLI, the gate and the phone all show
both, since it is hidden from the network, not from the user.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjJqpcEsaV5WRhPXyxCThd
2026-08-09 14:59:40 +02:00
..
.agents/skills Fix pre-existing CI failures (deps, lint, whitespace) 2026-07-10 23:55:56 +02:00
android Build and publish a signed APK on every push to main 2026-08-04 20:55:14 +02:00
assets/icon app: warm-tint the shared palette, fix Snack chip + on-fill contrast 2026-07-21 21:16:26 +02:00
bin app: add the desktop wrapper that serves the web build and fronts GitHub 2026-07-20 16:31:47 +02:00
desktop app: package the desktop app as the web build, and delete the Linux embedder 2026-07-20 16:32:24 +02:00
lib Show weekly and monthly average intake on both devices 2026-08-09 14:59:40 +02:00
test Show weekly and monthly average intake on both devices 2026-08-09 14:59:40 +02:00
web app: run the companion app's desktop target as a web build 2026-07-20 16:31:32 +02:00
.gitignore Add Flutter companion app skeleton with local meal logging 2026-06-22 18:22:42 +02:00
.metadata app: run the companion app's desktop target as a web build 2026-07-20 16:31:32 +02:00
analysis_options.yaml Add Flutter companion app skeleton with local meal logging 2026-06-22 18:22:42 +02:00
install_arch.sh app: package the desktop app as the web build, and delete the Linux embedder 2026-07-20 16:32:24 +02:00
pubspec.lock Sync meals and the food bank through Firebase, mirroring to GitHub 2026-08-05 08:35:21 +02:00
pubspec.yaml Sync meals and the food bank through Firebase, mirroring to GitHub 2026-08-05 08:35:21 +02:00
README.md Gate the companion app in the push hook, and document it properly 2026-07-20 17:01:40 +02:00
run.sh app: package the desktop app as the web build, and delete the Linux embedder 2026-07-20 16:32:24 +02:00
skills-lock.json Add Flutter/Dart agent skills and AI rules for Claude Code 2026-06-22 22:53:06 +02:00

diet_guard_app

Companion app for diet_guard: log meals on the phone, and on the Linux desktop, sharing one food log through GitHub-backed sync.

Two targets, and only two

Target What it is
Android a normal Flutter app (flutter build apk)
Linux desktop the Flutter web build, served by a local wrapper and shown in a Chrome --app window

There is no linux/ directory. Flutter's GTK embedder manages ~20fps at 3840x2160 -- measured on a stock flutter create counter app, so it is the toolkit rather than this code -- where the same Dart rendered by Chrome sustains ~144fps (~/todo/docs/desktop-performance-findings.md). Running flutter create --platforms linux here would silently restore the slow path.

Commands

flutter test                     # the app's suite
flutter analyze
bash run.sh                      # build the web bundle and launch the desktop app
bash install_arch.sh             # build + install the pacman package and .desktop entry
flutter build apk --release      # the phone build
adb install -r build/app/outputs/flutter-apk/app-release.apk

Never adb uninstall or pm clear this package: both wipe the on-device log.

The desktop wrapper

bin/diet_guard_desktop.dart is the other half of the desktop app, because a browser cannot touch the filesystem. It:

  • serves the built web assets from build/web (or /opt/diet-guard-app/web once packaged);
  • keeps an on-disk copy of every document and photo under ~/.local/share/diet-guard-desktop/, which is what makes a wiped Chrome profile recoverable -- for photos it is the only copy, since they never sync;
  • holds the GitHub token (~/.config/diet_guard_app/sync_token, falling back to the PC gate's ~/.config/diet_guard/sync_token) and proxies api.github.com plus the device flow, whose endpoints send no CORS headers and so cannot be called from a page at all.

The port (8732) and the Chrome --user-data-dir must stay fixed. IndexedDB is keyed by origin and lives inside that profile, so changing either looks to the app like a device with no history.

Platform seams

dart:io does not fail a web compile; it becomes a stub that throws at runtime, so the symptom of a missed seam is a blank white window rather than a build error. Every platform edge is a conditional export -- document_store*, blob_store*, background_tasks*, notification_backend*, token_vault*, github_client_factory*, attached_image*. Branch on kIsWeb before any Platform.is…, which itself throws on web.

What the desktop genuinely loses, by design rather than omission:

  • Background reminders. A browser runs nothing once its window is closed, so the due-slot check runs in-page every 5 minutes while the window is open. On the PC the real backstop is diet-guard-gate.timer, which locks the screen.
  • Camera capture. The browser picker is a file input.
  • Photo sharing between devices -- unchanged: imagePath was always stripped before push.

Sync identity

Three devices push under diet-guard-sync/devices/: pc (the Python gate), phone, and desktop. Each must keep its own id -- two devices sharing one would overwrite each other's pushed log on every tick.