Cleanup lib exports (#50)

src/lib/user-preferences.ts

@@ -0,0 +1,59 @@
+import clamp from 'just-clamp';
+import { persisted } from 'svelte-local-storage-store';
+
+export interface UserPreferences {
+	playback_rate: number;
+	volume: number;
+}
+
+/**
+ * The default user preferences
+ */
+const DEFAULT_USER_PREFERENCES: UserPreferences = {
+	playback_rate: 1,
+	volume: 1,
+};
+
+/**
+ * The user preferences store
+ */
+export const USER_PREFERENCES_STORE = persisted<UserPreferences>(
+	'USER_PREFERENCE',
+	DEFAULT_USER_PREFERENCES,
+);
+
+/**
+ * Sets the playback rate for the user
+ * @param  value - The playback rate value
+ */
+const set_playback_rate = (value: number) => {
+	const playback_rate = clamp(value, 0.5, 5);
+	return USER_PREFERENCES_STORE.update((prefs) => ({
+		...prefs,
+		playback_rate,
+	}));
+};
+
+/**
+ * Sets the volume for the user
+ * @param  value - The volume value
+ */
+const set_volume = (value: number) => {
+	const volume = clamp(value, 0, 1);
+	return USER_PREFERENCES_STORE.update((prefs) => ({ ...prefs, volume }));
+};
+
+/**
+ * Clears user preferences store
+ */
+const clear_store = () => USER_PREFERENCES_STORE.set(DEFAULT_USER_PREFERENCES);
+
+/**
+ * The user preferences object
+ */
+export const user_preferences = {
+	subscribe: USER_PREFERENCES_STORE.subscribe,
+	set_playback_rate,
+	set_volume,
+	clear: clear_store,
+};