chore: establish Sovereign AI reference
This commit is contained in:
Hamza Ayed
@@ -0,0 +1,214 @@
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import 'dart:convert';
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import 'dart:typed_data';
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import 'package:http/http.dart' as http;
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import 'package:http_parser/http_parser.dart';
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import 'package:uuid/uuid.dart';
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import '../../features/chat/presentation/cubit/chat_state.dart';
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const _uuid = Uuid();
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class ApiRepository {
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ApiRepository({required String baseUrl}) : _baseUrl = baseUrl;
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String _baseUrl;
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String? _cachedUserId;
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Future<String>? _loadingUserId;
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String get baseUrl => _baseUrl;
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String newId() => _uuid.v4();
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void setBaseUrl(String value) =>
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_baseUrl = value.replaceFirst(RegExp(r'/+$'), '');
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Future<String> _userId() async {
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final cached = _cachedUserId;
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if (cached != null) return cached;
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return _loadingUserId ??= _loadLocalUserId();
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}
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Future<String> _loadLocalUserId() async {
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final response = await http.get(Uri.parse('$_baseUrl/v1/local-user'));
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_checkStatus(response);
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final data = jsonDecode(response.body) as Map<String, dynamic>;
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_cachedUserId = data['user_id'] as String;
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return _cachedUserId!;
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}
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Future<Map<String, String>> _userHeaders() async => {
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'Content-Type': 'application/json',
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'X-User-ID': await _userId(),
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};
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void _checkStatus(http.Response response) {
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if (response.statusCode < 200 || response.statusCode >= 300) {
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throw Exception('API ${response.statusCode}: ${response.body}');
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}
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}
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Future<List<SavedConversation>> listConversations() async {
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final response = await http.get(
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Uri.parse('$_baseUrl/v1/conversations'),
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headers: await _userHeaders(),
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);
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_checkStatus(response);
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return (jsonDecode(response.body) as List<dynamic>)
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.map(
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(item) =>
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SavedConversation.fromSummaryJson(item as Map<String, dynamic>),
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)
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.toList();
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}
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Future<SavedConversation> getConversation(String id) async {
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final response = await http.get(
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Uri.parse('$_baseUrl/v1/conversations/$id'),
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headers: await _userHeaders(),
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);
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_checkStatus(response);
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final data = jsonDecode(response.body) as Map<String, dynamic>;
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return SavedConversation(
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id: data['id'] as String,
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title: data['title'] as String,
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updatedAt: DateTime.parse(data['updated_at'] as String).toLocal(),
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messages:
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(data['messages'] as List<dynamic>).map((item) {
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final message = item as Map<String, dynamic>;
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return ChatMessage(
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message['content'] as String,
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fromUser: message['role'] == 'user',
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);
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}).toList(),
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);
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}
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Future<void> saveConversation(SavedConversation conversation) async {
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final response = await http.put(
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Uri.parse('$_baseUrl/v1/conversations/${conversation.id}'),
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headers: await _userHeaders(),
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body: jsonEncode({
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'title': conversation.title,
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'messages':
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conversation.messages
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.map(
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(message) => {
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'role': message.fromUser ? 'user' : 'assistant',
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'content': message.text,
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},
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)
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.toList(),
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}),
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);
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_checkStatus(response);
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}
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Future<void> deleteConversation(String id) async {
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final response = await http.delete(
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Uri.parse('$_baseUrl/v1/conversations/$id'),
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headers: await _userHeaders(),
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);
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_checkStatus(response);
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}
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Future<String> complete(List<ChatMessage> messages) async {
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final response = await http
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.post(
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Uri.parse('$_baseUrl/v1/chat/completions'),
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headers: const {'Content-Type': 'application/json'},
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body: jsonEncode({
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'messages':
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messages
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.map(
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(message) => {
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'role': message.fromUser ? 'user' : 'assistant',
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'content': message.text,
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},
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)
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.toList(),
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}),
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)
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.timeout(const Duration(minutes: 3));
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if (response.statusCode < 200 || response.statusCode >= 300) {
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throw Exception('API ${response.statusCode}: ${response.body}');
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}
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final data = jsonDecode(response.body) as Map<String, dynamic>;
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final choices = data['choices'] as List<dynamic>;
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final message = choices.first['message'] as Map<String, dynamic>;
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return message['content'] as String? ?? 'لم يصل نص في الإجابة.';
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}
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Stream<String> completeStream(List<ChatMessage> messages) async* {
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final client = http.Client();
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try {
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final request =
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http.Request('POST', Uri.parse('$_baseUrl/v1/chat/stream'))
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..headers.addAll({
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'Content-Type': 'application/json',
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'Accept': 'application/x-ndjson',
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})
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..body = jsonEncode({
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'messages':
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messages
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.map(
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(message) => {
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'role': message.fromUser ? 'user' : 'assistant',
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'content': message.text,
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},
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)
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.toList(),
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});
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final response = await client
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.send(request)
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.timeout(const Duration(minutes: 3));
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if (response.statusCode < 200 || response.statusCode >= 300) {
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final body = await response.stream.bytesToString();
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throw Exception('API ${response.statusCode}: $body');
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}
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var completed = false;
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await for (final line in response.stream
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.transform(utf8.decoder)
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.transform(const LineSplitter())
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.timeout(const Duration(minutes: 3))) {
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if (line.isEmpty) continue;
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final event = jsonDecode(line) as Map<String, dynamic>;
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if (event['error'] != null) {
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throw Exception(event['error']);
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}
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if (event['done'] == true) {
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completed = true;
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break;
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}
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final delta = event['delta'] as String?;
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if (delta != null && delta.isNotEmpty) yield delta;
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}
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if (!completed) throw Exception('انقطع بث الإجابة قبل اكتماله.');
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} finally {
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client.close();
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}
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}
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Future<String> transcribe(Uint8List wavBytes) async {
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final request = http.MultipartRequest(
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'POST',
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Uri.parse('$_baseUrl/v1/audio/transcriptions'),
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)
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..files.add(
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http.MultipartFile.fromBytes(
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'file',
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wavBytes,
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filename: 'recording.wav',
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contentType: MediaType('audio', 'wav'),
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),
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);
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final streamed = await request.send().timeout(const Duration(minutes: 3));
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final response = await http.Response.fromStream(streamed);
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if (response.statusCode < 200 || response.statusCode >= 300) {
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throw Exception(
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'Transcription API ${response.statusCode}: ${response.body}',
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);
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}
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final data = jsonDecode(response.body) as Map<String, dynamic>;
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return data['text'] as String? ?? '';
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}
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}
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