Initial support for playlists. Missing permissions

utils/strings.go

@@ -32,3 +32,12 @@ func LongestCommonPrefix(list []string) string {
 	}
 	return list[0]
 }
+
+func StringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}