Fix voice transcription

pkg/voice/transcriber.go

@@ -16,6 +16,11 @@ import (
 	"github.com/sipeed/picoclaw/pkg/utils"
 )
 
+type Transcriber interface {
+	Transcribe(ctx context.Context, audioFilePath string) (*TranscriptionResponse, error)
+	IsAvailable() bool
+}
+
 type GroqTranscriber struct {
 	apiKey     string
 	apiBase    string

pkg/voice/transcriber_test.go

@@ -0,0 +1,97 @@
+package voice
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// Ensure GroqTranscriber satisfies the Transcriber interface at compile time.
+var _ Transcriber = (*GroqTranscriber)(nil)
+
+func TestIsAvailable(t *testing.T) {
+	tests := []struct {
+		name   string
+		apiKey string
+		want   bool
+	}{
+		{"with key", "sk-test-key", true},
+		{"empty key", "", false},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			tr := NewGroqTranscriber(tc.apiKey)
+			if got := tr.IsAvailable(); got != tc.want {
+				t.Errorf("IsAvailable() = %v, want %v", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestTranscribe(t *testing.T) {
+	// Write a minimal fake audio file so the transcriber can open and send it.
+	tmpDir := t.TempDir()
+	audioPath := filepath.Join(tmpDir, "clip.ogg")
+	if err := os.WriteFile(audioPath, []byte("fake-audio-data"), 0o644); err != nil {
+		t.Fatalf("failed to write fake audio file: %v", err)
+	}
+
+	t.Run("success", func(t *testing.T) {
+		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if r.URL.Path != "/audio/transcriptions" {
+				t.Errorf("unexpected path: %s", r.URL.Path)
+			}
+			if r.Header.Get("Authorization") != "Bearer sk-test" {
+				t.Errorf("unexpected Authorization header: %s", r.Header.Get("Authorization"))
+			}
+			w.Header().Set("Content-Type", "application/json")
+			_ = json.NewEncoder(w).Encode(TranscriptionResponse{
+				Text:     "hello world",
+				Language: "en",
+				Duration: 1.5,
+			})
+		}))
+		defer srv.Close()
+
+		tr := NewGroqTranscriber("sk-test")
+		tr.apiBase = srv.URL
+
+		resp, err := tr.Transcribe(context.Background(), audioPath)
+		if err != nil {
+			t.Fatalf("Transcribe() error: %v", err)
+		}
+		if resp.Text != "hello world" {
+			t.Errorf("Text = %q, want %q", resp.Text, "hello world")
+		}
+		if resp.Language != "en" {
+			t.Errorf("Language = %q, want %q", resp.Language, "en")
+		}
+	})
+
+	t.Run("api error", func(t *testing.T) {
+		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			http.Error(w, `{"error":"invalid_api_key"}`, http.StatusUnauthorized)
+		}))
+		defer srv.Close()
+
+		tr := NewGroqTranscriber("sk-bad")
+		tr.apiBase = srv.URL
+
+		_, err := tr.Transcribe(context.Background(), audioPath)
+		if err == nil {
+			t.Fatal("expected error for non-200 response, got nil")
+		}
+	})
+
+	t.Run("missing file", func(t *testing.T) {
+		tr := NewGroqTranscriber("sk-test")
+		_, err := tr.Transcribe(context.Background(), filepath.Join(tmpDir, "nonexistent.ogg"))
+		if err == nil {
+			t.Fatal("expected error for missing file, got nil")
+		}
+	})
+}