логирование

lib/features/launcher/data/launcher_log_service.dart

@@ -0,0 +1,117 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:moonwell_launcher/config.dart';
+import 'package:path/path.dart' as p;
+
+class LauncherLogService {
+  static Future<void> _pendingWrite = Future<void>.value();
+
+  Future<void> info(
+    String message, {
+    String? installationDir,
+    Map<String, Object?> details = const <String, Object?>{},
+  }) {
+    return _write(
+      level: 'INFO',
+      message: message,
+      installationDir: installationDir,
+      details: details,
+    );
+  }
+
+  Future<void> error(
+    String message, {
+    String? installationDir,
+    Map<String, Object?> details = const <String, Object?>{},
+    Object? error,
+    StackTrace? stackTrace,
+  }) {
+    return _write(
+      level: 'ERROR',
+      message: message,
+      installationDir: installationDir,
+      details: details,
+      error: error,
+      stackTrace: stackTrace,
+    );
+  }
+
+  Future<String> resolveLogPath({String? installationDir}) async {
+    final logDirectory =
+        installationDir == null || installationDir.trim().isEmpty
+        ? p.join(Directory.systemTemp.path, 'moonwell_launcher')
+        : p.join(installationDir, Config.launcherMetadataDirectoryName);
+
+    await Directory(logDirectory).create(recursive: true);
+    return p.join(logDirectory, Config.launcherLogFileName);
+  }
+
+  String logHint([String? installationDir]) {
+    if (installationDir == null || installationDir.trim().isEmpty) {
+      return Config.launcherLogFileName;
+    }
+
+    return '${Config.launcherMetadataDirectoryName}/${Config.launcherLogFileName}';
+  }
+
+  Future<void> _write({
+    required String level,
+    required String message,
+    required String? installationDir,
+    required Map<String, Object?> details,
+    Object? error,
+    StackTrace? stackTrace,
+  }) {
+    final operation = _pendingWrite.then((_) async {
+      final logPath = await resolveLogPath(installationDir: installationDir);
+      final buffer = StringBuffer()
+        ..writeln('[${DateTime.now().toIso8601String()}] [$level] $message');
+
+      for (final entry in details.entries) {
+        if (entry.value == null) {
+          continue;
+        }
+
+        buffer.writeln('${entry.key}: ${_stringify(entry.value)}');
+      }
+
+      if (error != null) {
+        buffer.writeln('error: ${_stringify(error)}');
+      }
+
+      if (stackTrace != null) {
+        buffer.writeln('stackTrace: $stackTrace');
+      }
+
+      buffer.writeln();
+      await File(
+        logPath,
+      ).writeAsString(buffer.toString(), mode: FileMode.append, flush: true);
+    });
+
+    _pendingWrite = operation.catchError((_) {});
+    return operation;
+  }
+
+  String _stringify(Object? value) {
+    if (value == null) {
+      return 'null';
+    }
+
+    if (value is String) {
+      return value;
+    }
+
+    if (value is Map || value is Iterable) {
+      try {
+        return jsonEncode(value);
+      } catch (_) {
+        return value.toString();
+      }
+    }
+
+    return value.toString();
+  }
+}