2 posts tagged with "AI"

import 'package:google_generative_ai/google_generative_ai.dart';

class GeminiService {
  final GenerativeModel _model;
  
  GeminiService() {
    _model = GenerativeModel(
      model: 'gemini-pro',
      apiKey: 'YOUR_API_KEY',
    );
  }
  
  Future<String> generateResponse(String prompt) async {
    try {
      final content = [Content.text(prompt)];
      final response = await _model.generateContent(content);
      return response.text ?? 'No response generated';
    } catch (e) {
      print('Error generating response: $e');
      return 'Error occurred while generating response';
    }
  }
}

class ChatScreen extends StatefulWidget {
  @override
  _ChatScreenState createState() => _ChatScreenState();
}

class _ChatScreenState extends State<ChatScreen> {
  final TextEditingController _controller = TextEditingController();
  final List<ChatMessage> _messages = [];
  final GeminiService _geminiService = GeminiService();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('AI Chat')),
      body: Column(
        children: [
          Expanded(
            child: ListView.builder(
              itemCount: _messages.length,
              itemBuilder: (context, index) => _messages[index],
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Row(
              children: [
                Expanded(
                  child: TextField(
                    controller: _controller,
                    decoration: InputDecoration(
                      hintText: 'Type your message...',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                IconButton(
                  icon: Icon(Icons.send),
                  onPressed: _sendMessage,
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  void _sendMessage() async {
    if (_controller.text.isEmpty) return;
    
    final userMessage = ChatMessage(
      text: _controller.text,
      isUser: true,
    );
    
    setState(() {
      _messages.add(userMessage);
      _controller.clear();
    });

    final response = await _geminiService.generateResponse(userMessage.text);
    
    setState(() {
      _messages.add(ChatMessage(
        text: response,
        isUser: false,
      ));
    });
  }
}

import 'package:firebase_ml_kit/firebase_ml_kit.dart';

class FirebaseAIService {
  final TextRecognizer _textRecognizer = FirebaseVision.instance.textRecognizer();
  
  Future<String> recognizeText(String imagePath) async {
    try {
      final FirebaseVisionImage image = 
          FirebaseVisionImage.fromFilePath(imagePath);
      final VisionText visionText = 
          await _textRecognizer.processImage(image);
      
      return visionText.text;
    } catch (e) {
      print('Error recognizing text: $e');
      return 'Error occurred while recognizing text';
    }
  }
}

class TextRecognitionScreen extends StatefulWidget {
  @override
  _TextRecognitionScreenState createState() => _TextRecognitionScreenState();
}

class _TextRecognitionScreenState extends State<TextRecognitionScreen> {
  final FirebaseAIService _aiService = FirebaseAIService();
  String _recognizedText = '';
  bool _isProcessing = false;

  Future<void> _processImage() async {
    setState(() {
      _isProcessing = true;
    });

    // Implement image picking logic here
    final String imagePath = await ImagePicker().getImage();
    
    if (imagePath != null) {
      final text = await _aiService.recognizeText(imagePath);
      setState(() {
        _recognizedText = text;
        _isProcessing = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Text Recognition')),
      body: Column(
        children: [
          if (_isProcessing)
            CircularProgressIndicator()
          else
            Expanded(
              child: SingleChildScrollView(
                padding: EdgeInsets.all(16),
                child: Text(_recognizedText),
              ),
            ),
          ElevatedButton(
            onPressed: _processImage,
            child: Text('Select Image'),
          ),
        ],
      ),
    );
  }
}

class AIService {
  Future<T> withRetry<T>(Future<T> Function() operation) async {
    int maxAttempts = 3;
    int attempt = 0;
    
    while (attempt < maxAttempts) {
      try {
        return await operation();
      } catch (e) {
        attempt++;
        if (attempt == maxAttempts) rethrow;
        await Future.delayed(Duration(seconds: attempt * 2));
      }
    }
    throw Exception('Max retry attempts reached');
  }
}

class AICache {
  final Map<String, String> _cache = {};
  
  String? getCachedResponse(String prompt) {
    return _cache[prompt];
  }
  
  void cacheResponse(String prompt, String response) {
    _cache[prompt] = response;
  }
}

class PaginatedChat extends StatefulWidget {
  @override
  _PaginatedChatState createState() => _PaginatedChatState();
}

class _PaginatedChatState extends State<PaginatedChat> {
  final ScrollController _scrollController = ScrollController();
  final List<ChatMessage> _messages = [];
  bool _isLoading = false;
  int _page = 1;

  @override
  void initState() {
    super.initState();
    _scrollController.addListener(_scrollListener);
    _loadMessages();
  }

  void _scrollListener() {
    if (_scrollController.position.pixels ==
        _scrollController.position.maxScrollExtent) {
      _loadMoreMessages();
    }
  }

  Future<void> _loadMoreMessages() async {
    if (_isLoading) return;
    
    setState(() {
      _isLoading = true;
    });

    // Implement pagination logic here
    final newMessages = await _loadMessagesFromAPI(_page++);
    
    setState(() {
      _messages.addAll(newMessages);
      _isLoading = false;
    });
  }
}

void main() {
  group('GeminiService Tests', () {
    late GeminiService service;

    setUp(() {
      service = GeminiService();
    });

    test('generateResponse returns valid response', () async {
      final response = await service.generateResponse('Hello');
      expect(response, isNotEmpty);
    });
  });
}

void main() {
  testWidgets('Chat UI Test', (WidgetTester tester) async {
    await tester.pumpWidget(MaterialApp(home: ChatScreen()));
    
    expect(find.text('AI Chat'), findsOneWidget);
    expect(find.byType(TextField), findsOneWidget);
    expect(find.byIcon(Icons.send), findsOneWidget);
  });
}