Add pure state-merge module with unit tests

2026-04-26 09:32:52 -07:00
parent ad8fde0dda
commit acf5e74f30
2 changed files with 70 additions and 0 deletions
@@ -0,0 +1,23 @@
+const initialState = Object.freeze({
+  title: '',
+  artist: '',
+  album: '',
+  albumArt: '',
+  isPlaying: false,
+  progress: 0,
+  duration: 0,
+});
+
+function mergeState(current, update) {
+  return {
+    title: update.title ?? current.title,
+    artist: update.artist ?? current.artist,
+    album: update.album ?? current.album,
+    albumArt: update.albumArt ?? current.albumArt,
+    isPlaying: update.isPlaying ?? current.isPlaying,
+    progress: update.progress ?? current.progress,
+    duration: update.duration ?? current.duration,
+  };
+}
+
+module.exports = { initialState, mergeState };