базовая логика скачивания обновлений

lib/features/launcher/domain/entities/client_hash_entry.dart

@@ -0,0 +1,30 @@
+import 'dart:convert';
+
+import 'package:crypto/crypto.dart';
+import 'package:path/path.dart' as p;
+
+abstract interface class ClientHashEntry {
+  String get path;
+  int get size;
+  String get sha256;
+}
+
+String normalizeClientPath(String rawPath) {
+  final sanitized = rawPath.replaceAll('\\', '/').trim();
+  final normalized = p.posix.normalize(sanitized);
+  return normalized.startsWith('./') ? normalized.substring(2) : normalized;
+}
+
+String computeBuildHash(Iterable<ClientHashEntry> entries) {
+  final canonicalEntries =
+      entries
+          .map(
+            (entry) =>
+                '${normalizeClientPath(entry.path)}:${entry.size}:${entry.sha256.toLowerCase()}',
+          )
+          .toList()
+        ..sort();
+
+  final payload = canonicalEntries.join('\n');
+  return sha256.convert(utf8.encode(payload)).toString();
+}

lib/features/launcher/domain/entities/client_installation_snapshot.dart

@@ -0,0 +1,23 @@
+import 'client_hash_entry.dart';
+import 'local_client_file.dart';
+
+final class ClientInstallationSnapshot {
+  final List<LocalClientFile> files;
+  final String buildHash;
+
+  const ClientInstallationSnapshot({
+    required this.files,
+    required this.buildHash,
+  });
+
+  factory ClientInstallationSnapshot.fromFiles(List<LocalClientFile> files) {
+    return ClientInstallationSnapshot(
+      files: files,
+      buildHash: computeBuildHash(files),
+    );
+  }
+
+  Map<String, LocalClientFile> get filesByPath => {
+    for (final file in files) normalizeClientPath(file.path): file,
+  };
+}

lib/features/launcher/domain/entities/client_manifest.dart

@@ -0,0 +1,26 @@
+import 'client_hash_entry.dart';
+import 'client_manifest_file.dart';
+
+final class ClientManifest {
+  final List<ClientManifestFile> files;
+  final String buildHash;
+
+  const ClientManifest({required this.files, required this.buildHash});
+
+  factory ClientManifest.fromJson(Map<String, dynamic> json) {
+    final files =
+        ((json['files'] as List<dynamic>? ?? const <dynamic>[])
+                .whereType<Map<String, dynamic>>()
+                .map(ClientManifestFile.fromJson)
+                .toList())
+            .cast<ClientManifestFile>();
+
+    return ClientManifest(files: files, buildHash: computeBuildHash(files));
+  }
+
+  Map<String, ClientManifestFile> get filesByPath => {
+    for (final file in files) normalizeClientPath(file.path): file,
+  };
+
+  int get totalSize => files.fold(0, (sum, file) => sum + file.size);
+}

lib/features/launcher/domain/entities/client_manifest_file.dart

@@ -0,0 +1,26 @@
+import 'client_hash_entry.dart';
+
+final class ClientManifestFile implements ClientHashEntry {
+  @override
+  final String path;
+
+  @override
+  final int size;
+
+  @override
+  final String sha256;
+
+  const ClientManifestFile({
+    required this.path,
+    required this.size,
+    required this.sha256,
+  });
+
+  factory ClientManifestFile.fromJson(Map<String, dynamic> json) {
+    return ClientManifestFile(
+      path: normalizeClientPath(json['path'] as String? ?? ''),
+      size: (json['size'] as num? ?? 0).toInt(),
+      sha256: (json['sha256'] as String? ?? '').toLowerCase(),
+    );
+  }
+}

lib/features/launcher/domain/entities/client_sync_status.dart

@@ -0,0 +1,33 @@
+import 'package:moonwell_launcher/features/downloader/domain/entities/download_progress.dart';
+
+enum ClientSyncStage {
+  fetchingManifest,
+  scanningLocalFiles,
+  comparingFiles,
+  removingStaleFiles,
+  downloadingFiles,
+  verifyingInstallation,
+  completed,
+}
+
+final class ClientSyncStatus {
+  final ClientSyncStage stage;
+  final DownloadProgress progress;
+  final String message;
+  final String? currentPath;
+  final String? localBuildHash;
+  final String? remoteBuildHash;
+  final int processedFiles;
+  final int totalFiles;
+
+  const ClientSyncStatus({
+    required this.stage,
+    required this.progress,
+    required this.message,
+    required this.currentPath,
+    required this.localBuildHash,
+    required this.remoteBuildHash,
+    required this.processedFiles,
+    required this.totalFiles,
+  });
+}

lib/features/launcher/domain/entities/launcher_exception.dart

@@ -0,0 +1,20 @@
+sealed class LauncherException implements Exception {
+  final String message;
+
+  const LauncherException(this.message);
+
+  @override
+  String toString() => message;
+}
+
+final class LauncherConfigurationException extends LauncherException {
+  const LauncherConfigurationException(super.message);
+}
+
+final class LauncherApiException extends LauncherException {
+  const LauncherApiException(super.message);
+}
+
+final class LauncherSyncException extends LauncherException {
+  const LauncherSyncException(super.message);
+}

lib/features/launcher/domain/entities/launcher_session.dart

@@ -0,0 +1,27 @@
+final class LauncherSession {
+  final String accessToken;
+  final String tokenType;
+  final DateTime? expiresAt;
+
+  const LauncherSession({
+    required this.accessToken,
+    required this.tokenType,
+    required this.expiresAt,
+  });
+
+  factory LauncherSession.fromJson(Map<String, dynamic> json) {
+    return LauncherSession(
+      accessToken: json['access_token'] as String? ?? '',
+      tokenType: json['token_type'] as String? ?? 'Bearer',
+      expiresAt: _parseDateTime(json['expires_at'] as String?),
+    );
+  }
+
+  static DateTime? _parseDateTime(String? rawValue) {
+    if (rawValue == null || rawValue.isEmpty) {
+      return null;
+    }
+
+    return DateTime.tryParse(rawValue);
+  }
+}

lib/features/launcher/domain/entities/local_client_file.dart

@@ -0,0 +1,18 @@
+import 'client_hash_entry.dart';
+
+final class LocalClientFile implements ClientHashEntry {
+  @override
+  final String path;
+
+  @override
+  final int size;
+
+  @override
+  final String sha256;
+
+  const LocalClientFile({
+    required this.path,
+    required this.size,
+    required this.sha256,
+  });
+}