update

utils/ioutils/ioutils.go

@@ -0,0 +1,33 @@
+package ioutils
+
+import (
+	"io"
+	"os"
+
+	"golang.org/x/text/encoding/unicode"
+	"golang.org/x/text/transform"
+)
+
+// UTF8Reader wraps an io.Reader to handle Byte Order Mark (BOM) properly.
+// It strips UTF-8 BOM if present, and converts UTF-16 (LE/BE) to UTF-8.
+// This is particularly useful for reading user-provided text files (like LRC lyrics,
+// playlists) that may have been created on Windows, which often adds BOM markers.
+//
+// Reference: https://en.wikipedia.org/wiki/Byte_order_mark
+func UTF8Reader(r io.Reader) io.Reader {
+	return transform.NewReader(r, unicode.BOMOverride(unicode.UTF8.NewDecoder()))
+}
+
+// UTF8ReadFile reads the named file and returns its contents as a byte slice,
+// automatically handling BOM markers. It's similar to os.ReadFile but strips
+// UTF-8 BOM and converts UTF-16 encoded files to UTF-8.
+func UTF8ReadFile(filename string) ([]byte, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	reader := UTF8Reader(file)
+	return io.ReadAll(reader)
+}