Headless Improvements (#41)

src/lib/user/user-progress.ts

@@ -0,0 +1,53 @@
+import { persisted } from 'svelte-local-storage-store';
+import { get } from 'svelte/store';
+import { episode_audio, episode_progress } from '../audio';
+import { announce, use_url } from '../utility';
+
+export type UserProgress = {
+	[key: string]: number;
+};
+
+const default_user_progress = {};
+const user_progress_store = persisted<UserProgress>('USER_PROGRESS', default_user_progress);
+
+/**
+ * Saves user progress
+ */
+const save = () => {
+	const audio = get(episode_audio);
+	if (!audio?.src) return;
+
+	announce.info('saving progress: ', audio.src);
+
+	const pathname = use_url(audio.src).pathname;
+	const current_time = get(episode_progress).current_time;
+	user_progress_store.update((prev) => ({ ...prev, [pathname]: current_time }));
+};
+
+/**
+ * Gets user progress for a given audio source
+ * @param {string} src - Audio source
+ * @returns {number} - User progress for the given audio source
+ */
+const get_user_progress = (src: string) => {
+	const pathname = use_url(src).pathname;
+	const store = get(user_progress_store) as UserProgress;
+
+	return store[pathname];
+};
+
+/**
+ * Clears user progress store
+ */
+const clear_user_progress = () => user_progress_store.set(default_user_progress);
+
+export const user_progress = {
+	/**
+	 * Subscribes to user preferences store
+	 */
+	subscribe: user_progress_store.subscribe,
+
+	get: get_user_progress,
+	clear: clear_user_progress,
+	save,
+};