Refactor file type functions

model/file_types.go

@@ -0,0 +1,30 @@
+package model
+
+import (
+	"mime"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/exp/slices"
+)
+
+var excludeAudioType = []string{
+	"audio/x-mpegurl",
+	"audio/x-scpls",
+}
+
+func IsAudioFile(filePath string) bool {
+	extension := filepath.Ext(filePath)
+	mimeType := mime.TypeByExtension(extension)
+	return !slices.Contains(excludeAudioType, mimeType) && strings.HasPrefix(mimeType, "audio/")
+}
+
+func IsImageFile(filePath string) bool {
+	extension := filepath.Ext(filePath)
+	return strings.HasPrefix(mime.TypeByExtension(extension), "image/")
+}
+
+func IsValidPlaylist(filePath string) bool {
+	extension := strings.ToLower(filepath.Ext(filePath))
+	return extension == ".m3u" || extension == ".m3u8" || extension == ".nsp"
+}