Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/asr/service.go

@@ -0,0 +1,102 @@
+package asr
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+)
+
+// Service provides speech-to-text functionality
+type Service interface {
+	TranscribeStream(ctx context.Context, audioStream io.Reader) (<-chan TranscriptEvent, error)
+	Transcribe(ctx context.Context, audioData []byte) (string, error)
+}
+
+// TranscriptEvent represents a transcription event
+type TranscriptEvent struct {
+	Type      string  `json:"type"` // "partial" or "final"
+	Text      string  `json:"text"`
+	Confidence float64 `json:"confidence,omitempty"`
+	Timestamp int64   `json:"timestamp"`
+	Words     []Word  `json:"words,omitempty"`
+}
+
+// Word represents a word with timing information
+type Word struct {
+	Word      string  `json:"word"`
+	StartTime float64 `json:"start_time"`
+	EndTime   float64 `json:"end_time"`
+	Confidence float64 `json:"confidence,omitempty"`
+}
+
+// MockASRService is a mock implementation for development
+type MockASRService struct{}
+
+// NewMockASRService creates a new mock ASR service
+func NewMockASRService() *MockASRService {
+	return &MockASRService{}
+}
+
+// TranscribeStream transcribes an audio stream
+func (s *MockASRService) TranscribeStream(ctx context.Context, audioStream io.Reader) (<-chan TranscriptEvent, error) {
+	events := make(chan TranscriptEvent, 10)
+
+	go func() {
+		defer close(events)
+
+		// Mock implementation - in production, integrate with Deepgram, Google STT, etc.
+		// For now, just send a mock event
+		select {
+		case <-ctx.Done():
+			return
+		case events <- TranscriptEvent{
+			Type:      "final",
+			Text:      "Hello, how can I help you today?",
+			Confidence: 0.95,
+			Timestamp: time.Now().Unix(),
+		}:
+		}
+	}()
+
+	return events, nil
+}
+
+// Transcribe transcribes audio data
+func (s *MockASRService) Transcribe(ctx context.Context, audioData []byte) (string, error) {
+	// Mock implementation
+	return "Hello, how can I help you today?", nil
+}
+
+// DeepgramASRService integrates with Deepgram (example - requires API key)
+type DeepgramASRService struct {
+	apiKey string
+}
+
+// NewDeepgramASRService creates a new Deepgram ASR service
+func NewDeepgramASRService(apiKey string) *DeepgramASRService {
+	return &DeepgramASRService{
+		apiKey: apiKey,
+	}
+}
+
+// TranscribeStream transcribes using Deepgram streaming API
+func (s *DeepgramASRService) TranscribeStream(ctx context.Context, audioStream io.Reader) (<-chan TranscriptEvent, error) {
+	events := make(chan TranscriptEvent, 10)
+
+	// TODO: Implement Deepgram streaming API integration
+	// This would involve:
+	// 1. Establishing WebSocket connection to Deepgram
+	// 2. Sending audio chunks
+	// 3. Receiving partial and final transcripts
+	// 4. Converting to TranscriptEvent format
+
+	return events, fmt.Errorf("not implemented - requires Deepgram API integration")
+}
+
+// Transcribe transcribes using Deepgram REST API
+func (s *DeepgramASRService) Transcribe(ctx context.Context, audioData []byte) (string, error) {
+	// TODO: Implement Deepgram REST API integration
+	return "", fmt.Errorf("not implemented - requires Deepgram API integration")
+}
+