feat(openaiprovider): implement text-to-speech provider

internal/providers/openaiprovider/texttospeech.go

@@ -0,0 +1,60 @@
+package openaiprovider
+
+import (
+	"context"
+	"fmt"
+	"io"
+
+	baseprovider "github.com/nullswan/nomi/internal/providers/base"
+	"github.com/sashabaranov/go-openai"
+)
+
+const (
+	OpenAITextToSpeechDefaultModel = openai.TTSModel1
+)
+
+type TextToSpeechProvider struct {
+	client *openai.Client
+}
+
+func NewTextToSpeechProvider(
+	config oaiProviderConfig,
+) (baseprovider.TextToSpeechProvider, error) {
+	p := &TextToSpeechProvider{
+		client: openai.NewClient(config.apiKey),
+	}
+
+	return p, nil
+}
+
+func (p TextToSpeechProvider) Close() error {
+	return nil
+}
+
+func (p TextToSpeechProvider) GenerateSpeech(
+	ctx context.Context,
+	message string,
+) ([]byte, error) {
+	resp, err := p.client.CreateSpeech(ctx, openai.CreateSpeechRequest{
+		Model: OpenAITextToSpeechDefaultModel,
+		Voice: openai.VoiceAlloy,
+		Input: message,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("error creating speech: %w", err)
+	}
+
+	defer resp.Close()
+
+	buf, err := io.ReadAll(resp)
+	if err != nil {
+		return nil, fmt.Errorf("error reading speech response: %w", err)
+	}
+
+	return buf, nil
+}
+
+// For now, we are always using the default model
+func (p TextToSpeechProvider) GetModel() string {
+	return string(OpenAITextToSpeechDefaultModel)
+}