Ollie Taylor
89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
import clamp from 'just-clamp';
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import { persisted } from 'svelte-local-storage-store';
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/**
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* @typedef {Object} UserPreferences
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* @property {number} playback_rate - The audio player playback rate (speed)
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* @property {number} volume - The audio player volume
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*/
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/**
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* The default user preferences
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* @type {UserPreferences}
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*/
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const DEFAULT_USER_PREFERENCES = { playback_rate: 1, volume: 1 };
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/**
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* The user preferences store
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* @type {import('svelte/store').Writable<UserPreferences>}
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*/
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const USER_PREFERENCES_STORE = persisted(
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'USER_PREFERENCE',
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DEFAULT_USER_PREFERENCES,
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);
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/**
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* Sets the playback rate for the user
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* @param {number} value - The playback rate value
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* @returns {void}
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*/
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const set_playback_rate = (value) => {
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const playback_rate = clamp(value, 0.5, 5);
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return USER_PREFERENCES_STORE.update((prefs) => ({
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...prefs,
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playback_rate,
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}));
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};
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/**
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* Sets the volume for the user
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* @param {number} value - The volume value
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* @returns {void}
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*/
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const set_volume = (value) => {
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const volume = clamp(value, 0, 1);
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return USER_PREFERENCES_STORE.update((prefs) => ({ ...prefs, volume }));
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};
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/**
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* Clears user preferences store
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*/
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const clear_store = () => USER_PREFERENCES_STORE.set(DEFAULT_USER_PREFERENCES);
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/**
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* @typedef {Object} UserPreferencesObject
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* @property {typeof USER_PREFERENCES_STORE.subscribe} subscribe - Subscribes to the user preferences store
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* @property {typeof set_playback_rate} set_playback_rate - Sets the playback rate for the user
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* @property {typeof set_volume} set_volume - Sets the volume for the user
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* @property {typeof clear_store} clear - Clears saved user preferences
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*/
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/**
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* The user preferences object
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* @type {UserPreferencesObject}
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*/
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export const user_preferences = {
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/**
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* Subscribes to user preferences store
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*/
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subscribe: USER_PREFERENCES_STORE.subscribe,
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/**
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* Sets the playback rate for the user
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* @type {typeof set_playback_rate}
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*/
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set_playback_rate,
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/**
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* Sets the volume for the user
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* @type {typeof set_volume}
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*/
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set_volume,
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/**
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* Clears user preferences store
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* @type {typeof clear_store}
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*/
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clear: clear_store,
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};
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