Initial commit — DLS lab-app Flutter project

2026-06-10 23:22:15 +03:00
commit d1acc1d367
225 changed files with 31294 additions and 0 deletions
@@ -0,0 +1,71 @@
+import 'dart:async';
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+
+class AiService {
+  static const _baseUrl = 'https://api.featherless.ai/v1';
+  static const _apiKey =
+      'rc_e10f49aaa4f7af03dcd9da115cfc12cc1988665e895955c11f77788ee5ad93c6';
+  static const _model = 'Qwen/Qwen2.5-7B-Instruct';
+
+  AiService._();
+  static final instance = AiService._();
+
+  Stream<String> streamChat({
+    required String systemPrompt,
+    required List<Map<String, String>> messages,
+  }) async* {
+    final client = http.Client();
+    try {
+      final request = http.Request(
+        'POST',
+        Uri.parse('$_baseUrl/chat/completions'),
+      );
+      request.headers.addAll({
+        'Authorization': 'Bearer $_apiKey',
+        'Content-Type': 'application/json',
+      });
+      request.body = jsonEncode({
+        'model': _model,
+        'messages': [
+          {'role': 'system', 'content': systemPrompt},
+          ...messages,
+        ],
+        'stream': true,
+        'max_tokens': 2048,
+        'temperature': 0.7,
+      });
+
+      final response = await client.send(request);
+      if (response.statusCode != 200) {
+        final body = await response.stream.bytesToString();
+        String msg = 'API hatası ${response.statusCode}';
+        try {
+          final j = jsonDecode(body) as Map<String, dynamic>;
+          msg = (j['error'] as Map?)?['message'] as String? ?? msg;
+        } catch (_) {}
+        throw Exception(msg);
+      }
+
+      final lines = response.stream
+          .transform(utf8.decoder)
+          .transform(const LineSplitter());
+
+      await for (final line in lines) {
+        if (!line.startsWith('data: ')) continue;
+        final payload = line.substring(6).trim();
+        if (payload == '[DONE]') break;
+        try {
+          final j = jsonDecode(payload) as Map<String, dynamic>;
+          final choices = j['choices'] as List?;
+          if (choices == null || choices.isEmpty) continue;
+          final delta = choices.first['delta'] as Map<String, dynamic>?;
+          final content = delta?['content'] as String?;
+          if (content != null && content.isNotEmpty) yield content;
+        } catch (_) {}
+      }
+    } finally {
+      client.close();
+    }
+  }
+}