feat: various refactorings

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

api/localai.go

@@ -1,80 +0,0 @@
-package api
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-
-	model "github.com/go-skynet/LocalAI/pkg/model"
-	"github.com/go-skynet/LocalAI/pkg/tts"
-	"github.com/go-skynet/LocalAI/pkg/utils"
-	"github.com/gofiber/fiber/v2"
-)
-
-type TTSRequest struct {
-	Model string `json:"model" yaml:"model"`
-	Input string `json:"input" yaml:"input"`
-}
-
-func generateUniqueFileName(dir, baseName, ext string) string {
-	counter := 1
-	fileName := baseName + ext
-
-	for {
-		filePath := filepath.Join(dir, fileName)
-		_, err := os.Stat(filePath)
-		if os.IsNotExist(err) {
-			return fileName
-		}
-
-		counter++
-		fileName = fmt.Sprintf("%s_%d%s", baseName, counter, ext)
-	}
-}
-
-func ttsEndpoint(cm *ConfigMerger, o *Option) func(c *fiber.Ctx) error {
-	return func(c *fiber.Ctx) error {
-
-		input := new(TTSRequest)
-		// Get input data from the request body
-		if err := c.BodyParser(input); err != nil {
-			return err
-		}
-
-		piperModel, err := o.loader.BackendLoader(
-			model.WithBackendString(model.PiperBackend),
-			model.WithModelFile(input.Model),
-			model.WithAssetDir(o.assetsDestination))
-		if err != nil {
-			return err
-		}
-
-		if piperModel == nil {
-			return fmt.Errorf("could not load piper model")
-		}
-
-		w, ok := piperModel.(*tts.Piper)
-		if !ok {
-			return fmt.Errorf("loader returned non-piper object %+v", w)
-		}
-
-		if err := os.MkdirAll(o.audioDir, 0755); err != nil {
-			return err
-		}
-
-		fileName := generateUniqueFileName(o.audioDir, "piper", ".wav")
-		filePath := filepath.Join(o.audioDir, fileName)
-
-		modelPath := filepath.Join(o.loader.ModelPath, input.Model)
-
-		if err := utils.VerifyPath(modelPath, o.loader.ModelPath); err != nil {
-			return err
-		}
-
-		if err := w.TTS(input.Input, modelPath, filePath); err != nil {
-			return err
-		}
-
-		return c.Download(filePath)
-	}
-}