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finalize code paths for offline areas, caching, in light of multiple tile providers

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stopflock
2025-08-26 17:52:14 -05:00
parent 17c9ee0c5c
commit a3edcfc2de
6 changed files with 69 additions and 49 deletions
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lib/services/map_data_submodules/tiles_from_local.dart
+10 -2
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@@ -3,9 +3,14 @@ import 'package:latlong2/latlong.dart';
import '../offline_area_service.dart';
import '../offline_areas/offline_area_models.dart';
import '../offline_areas/offline_tile_utils.dart';
import '../../app_state.dart';
/// Fetch a tile from the newest offline area that plausibly contains it, or throw if not found.
/// Fetch a tile from the newest offline area that matches the current provider, or throw if not found.
Future<List<int>> fetchLocalTile({required int z, required int x, required int y}) async {
final appState = AppState.instance;
final currentProvider = appState.selectedTileProvider;
final currentTileType = appState.selectedTileType;
final offlineService = OfflineAreaService();
await offlineService.ensureInitialized();
final areas = offlineService.offlineAreas;
@@ -14,6 +19,9 @@ Future<List<int>> fetchLocalTile({required int z, required int x, required int y
for (final area in areas) {
if (area.status != OfflineAreaStatus.complete) continue;
if (z < area.minZoom || z > area.maxZoom) continue;
// Only consider areas that match the current provider/type
if (area.tileProviderId != currentProvider?.id || area.tileTypeId != currentTileType?.id) continue;
// Get tile coverage for area at this zoom only
final coveredTiles = computeTileList(area.bounds, z, z);
@@ -28,7 +36,7 @@ Future<List<int>> fetchLocalTile({required int z, required int x, required int y
}
}
if (candidates.isEmpty) {
throw Exception('Tile $z/$x/$y not found in any offline area');
throw Exception('Tile $z/$x/$y from current provider ${currentProvider?.id}/${currentTileType?.id} not found in any offline area');
}
candidates.sort((a, b) => b.modified.compareTo(a.modified)); // newest first
return await candidates.first.file.readAsBytes();