refactor(core): CORE-18 type builtins and own prompt lifetimes

packages/artplayer/src/plugins/auto-playback/records.ts

@@ -0,0 +1,44 @@
+import type { SubscriptionHost } from '../../component/resources'
+import { eventSubscriptions } from '../../events/subscriptions'
+import { isClosing } from '../../lifecycle/instance'
+
+export type PlaybackTimes = Record<string, number>
+
+export interface PlaybackStorage {
+  get: (key: 'times') => PlaybackTimes | null | undefined
+  set: (key: 'times', value: PlaybackTimes) => void
+  del: (key: 'times') => void
+}
+
+export interface PlaybackRecordHost extends SubscriptionHost<{ 'video:timeupdate': [Event] }> {
+  storage: PlaybackStorage
+  constructor: { AUTO_PLAYBACK_MAX: number }
+  option: { id?: string, url: string }
+  playing: boolean
+  currentTime: number
+}
+
+export function readTimes(storage: PlaybackStorage): PlaybackTimes {
+  return storage.get('times') || {}
+}
+
+export function installPlaybackRecords(art: PlaybackRecordHost): void {
+  const { storage, constructor } = art
+  eventSubscriptions<{ 'video:timeupdate': [Event] }>(art)('video:timeupdate', () => {
+    if (!art.playing)
+      return
+    const times = readTimes(storage)
+    const keys = Object.keys(times)
+    const max = constructor.AUTO_PLAYBACK_MAX
+    const key = art.option.id || art.option.url
+    const time = art.currentTime
+    if (isClosing(art))
+      return
+    // Preserve the historical strict threshold and one-oldest-entry pruning.
+    if (keys.length > max)
+      delete times[keys[0]!]
+    times[key] = time
+    if (!isClosing(art))
+      storage.set('times', times)
+  })
+}