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genericize tiles_from submodule, simpletileservice.

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stopflock
2025-08-24 15:08:36 -05:00
parent aada97295b
commit 4ee783793f
3 changed files with 92 additions and 41 deletions
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lib/services/simple_tile_service.dart
+53 -23
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@@ -13,35 +13,65 @@ class SimpleTileHttpClient extends http.BaseClient {
@override
Future<http.StreamedResponse> send(http.BaseRequest request) async {
// Only intercept tile requests to OSM (for now - other providers pass through)
if (request.url.host == 'tile.openstreetmap.org') {
return _handleTileRequest(request);
// Try to parse as a tile request from any provider
final tileInfo = _parseTileRequest(request.url);
if (tileInfo != null) {
return _handleTileRequest(request, tileInfo);
}
// Pass through all other requests (Google, Mapbox, etc.)
// Pass through non-tile requests
return _inner.send(request);
}
Future<http.StreamedResponse> _handleTileRequest(http.BaseRequest request) async {
final pathSegments = request.url.pathSegments;
/// Parse URL to extract tile coordinates if it looks like a tile request
Map<String, dynamic>? _parseTileRequest(Uri url) {
final pathSegments = url.pathSegments;
// Parse z/x/y from URL like: /15/5242/12666.png
if (pathSegments.length == 3) {
final z = int.tryParse(pathSegments[0]);
final x = int.tryParse(pathSegments[1]);
final yPng = pathSegments[2];
final y = int.tryParse(yPng.replaceAll('.png', ''));
if (z != null && x != null && y != null) {
return _getTile(z, x, y);
// Common patterns for tile URLs:
// OSM: /z/x/y.png
// Google: /vt/lyrs=y&x=x&y=y&z=z (query params)
// Mapbox: /styles/v1/mapbox/streets-v12/tiles/z/x/y
// ArcGIS: /tile/z/y/x.png
// Try query parameters first (Google style)
final query = url.queryParameters;
if (query.containsKey('x') && query.containsKey('y') && query.containsKey('z')) {
final x = int.tryParse(query['x']!);
final y = int.tryParse(query['y']!);
final z = int.tryParse(query['z']!);
if (x != null && y != null && z != null) {
return {'z': z, 'x': x, 'y': y, 'originalUrl': url.toString()};
}
}
// Malformed tile URL - pass through to OSM
return _inner.send(request);
// Try path-based patterns
if (pathSegments.length >= 3) {
// Try z/x/y pattern (OSM style) - can be at different positions
for (int i = 0; i <= pathSegments.length - 3; i++) {
final z = int.tryParse(pathSegments[i]);
final x = int.tryParse(pathSegments[i + 1]);
final yWithExt = pathSegments[i + 2];
final y = int.tryParse(yWithExt.replaceAll(RegExp(r'\.[^.]*$'), '')); // Remove file extension
if (z != null && x != null && y != null) {
return {'z': z, 'x': x, 'y': y, 'originalUrl': url.toString()};
}
}
}
return null; // Not a recognizable tile request
}
Future<http.StreamedResponse> _getTile(int z, int x, int y) async {
Future<http.StreamedResponse> _handleTileRequest(http.BaseRequest request, Map<String, dynamic> tileInfo) async {
final z = tileInfo['z'] as int;
final x = tileInfo['x'] as int;
final y = tileInfo['y'] as int;
final originalUrl = tileInfo['originalUrl'] as String;
return _getTile(z, x, y, originalUrl, request.url.host);
}
Future<http.StreamedResponse> _getTile(int z, int x, int y, String originalUrl, String providerHost) async {
try {
// First try to get tile from offline storage
final localTileBytes = await _mapDataProvider.getTile(z: z, x: x, y: y, source: MapSource.local);
@@ -69,7 +99,7 @@ class SimpleTileHttpClient extends http.BaseClient {
// Check if we're in offline mode
if (AppState.instance.offlineMode) {
debugPrint('[SimpleTileService] Offline mode - not attempting OSM fetch for $z/$x/$y');
debugPrint('[SimpleTileService] Offline mode - not attempting $providerHost fetch for $z/$x/$y');
// Report that we couldn't serve this tile offline
NetworkStatus.instance.reportOfflineMiss();
return http.StreamedResponse(
@@ -79,17 +109,17 @@ class SimpleTileHttpClient extends http.BaseClient {
);
}
// We're online - try OSM with proper error handling
debugPrint('[SimpleTileService] Online mode - trying OSM for $z/$x/$y');
// We're online - try the original provider with proper error handling
debugPrint('[SimpleTileService] Online mode - trying $providerHost for $z/$x/$y');
try {
final response = await _inner.send(http.Request('GET', Uri.parse('https://tile.openstreetmap.org/$z/$x/$y.png')));
final response = await _inner.send(http.Request('GET', Uri.parse(originalUrl)));
// Clear waiting status on successful network tile
if (response.statusCode == 200) {
NetworkStatus.instance.clearWaiting();
}
return response;
} catch (networkError) {
debugPrint('[SimpleTileService] OSM request failed for $z/$x/$y: $networkError');
debugPrint('[SimpleTileService] $providerHost request failed for $z/$x/$y: $networkError');
// Return 404 instead of throwing - let flutter_map handle gracefully
return http.StreamedResponse(
Stream.value(<int>[]),