mirror of
https://github.com/kuhyx/diet-guard.git
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Krzysztof kuhy Rudnicki
802ee0fe6d
Flutter's Linux 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 (evidence in ~/todo/docs/desktop-performance-findings.md). The desktop target therefore becomes a Flutter *web* build; Android is untouched. `dart:io` does not fail a web *compile* -- it resolves to a stub that throws at runtime -- so every platform edge moves behind a conditional export rather than being discovered later as a blank white window: - storage: `document_store*.dart`, files on Android and IndexedDB in the browser (mirrored to the desktop wrapper, which is what makes a wiped Chrome profile recoverable). Document names stay the exact pre-web filenames so an installed phone keeps reading its existing log. - photos: `blob_store*.dart` plus `attached_image*.dart`, since `Image.file` cannot resolve an IndexedDB key. The picker itself has web support; what changed is the storage and display model. Camera *capture* is genuinely lost on desktop -- and photos never crossed devices anyway, `imagePath` being stripped before push. - scheduling: `background_tasks*.dart`. A browser has no WorkManager equivalent -- a closed tab runs nothing -- so the desktop runs an in-page 5-minute check while its window is open. That loses nothing on the PC, where `diet-guard-gate.timer` already locks the screen on an unlogged slot, which is strictly stronger than a notification. - notifications: `notification_backend*.dart`, the browser Notifications API in place of flutter_local_notifications. - the GitHub token: `token_vault*.dart`. On web it is *not* held by the browser at all -- flutter_secure_storage's web backend is WebCrypto-wrapped localStorage with the wrap key beside the ciphertext, which is obfuscation, not encryption at rest -- so the desktop wrapper owns it and proxies the API (`github_client_factory*.dart`). `Platform.isAndroid` itself throws on web, so every platform branch now tests `kIsWeb` first; the battery-optimization row (permission_handler, no web implementation) is hidden off Android. The desktop pushes under device id `desktop`, not `phone`: sharing an id would have made the two devices overwrite each other's pushed log on every tick. The Python side enumerates device directories generically, so it needs no change. Tests move onto the same seams -- the file-backed stores keep the atomicity and unreadable-file guarantees where they belong. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
93 lines
2.6 KiB
Dart
93 lines
2.6 KiB
Dart
/// IndexedDB-backed attached-photo widget (desktop web build).
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library;
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import 'dart:typed_data';
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import 'package:diet_guard_app/services/photo_attach_service.dart';
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import 'package:flutter/material.dart';
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/// Renders the photo stored under [path], falling back to a broken-image
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/// icon when it cannot be read.
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///
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/// Unlike the Android build this is inherently asynchronous: the bytes come
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/// from IndexedDB (or, for a cleared profile, the desktop wrapper's disk
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/// mirror), not from a path the rasteriser can open itself.
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class AttachedImage extends StatefulWidget {
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/// Creates an [AttachedImage] for the blob key [path].
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const AttachedImage({
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required this.path,
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this.width,
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this.height,
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this.fit,
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this.errorIconSize,
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this.errorIconColor,
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super.key,
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});
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/// Blob key of the photo -- an IndexedDB key on this platform.
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final String path;
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/// Optional fixed width; null renders at the image's own size.
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final double? width;
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/// Optional fixed height; null renders at the image's own size.
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final double? height;
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/// How to inscribe the image into its box.
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final BoxFit? fit;
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/// Size of the fallback broken-image icon.
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final double? errorIconSize;
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/// Colour of the fallback broken-image icon.
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final Color? errorIconColor;
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@override
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State<AttachedImage> createState() => _AttachedImageState();
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}
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class _AttachedImageState extends State<AttachedImage> {
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late Future<Uint8List?> _bytes = _load();
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Future<Uint8List?> _load() => PhotoAttachService.instance.readBytes(
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widget.path,
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);
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@override
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void didUpdateWidget(AttachedImage oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.path != widget.path) _bytes = _load();
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}
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@override
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Widget build(BuildContext context) {
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return FutureBuilder<Uint8List?>(
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future: _bytes,
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builder: (context, snapshot) {
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final bytes = snapshot.data;
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if (bytes == null) {
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// Covers both "still loading" and "gone": a spinner that flashes
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// for one frame per thumbnail would be worse than an empty box.
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return SizedBox(
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width: widget.width,
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height: widget.height,
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child: snapshot.connectionState == ConnectionState.done
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? Icon(
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Icons.broken_image,
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size: widget.errorIconSize,
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color: widget.errorIconColor,
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)
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: null,
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);
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}
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return Image.memory(
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bytes,
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width: widget.width,
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height: widget.height,
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fit: widget.fit,
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);
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},
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);
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}
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}
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