refactor(core): CORE-15 type subtitles and own request and track lifetimes

test/types/subtitle-manager.ts

@@ -0,0 +1,27 @@
+import type Subtitle from '../../packages/artplayer/src/subtitle'
+import type { SubtitleCue, SubtitleHost, SubtitleOption } from '../../packages/artplayer/src/subtitle/types'
+
+type Equal<A, B> = (<T>() => T extends A ? 1 : 2) extends (<T>() => T extends B ? 1 : 2) ? true : false
+type Expect<T extends true> = T
+
+declare const subtitle: Subtitle
+declare const host: SubtitleHost
+declare const options: SubtitleOption
+
+subtitle.init(options)
+subtitle.switch('/subtitle.vtt', { onVttLoad: vtt => vtt })
+subtitle.style({ color: 'red' })
+subtitle.style('fontSize', '22px')
+subtitle.url = '/subtitle.srt'
+host.emit('subtitleBeforeUpdate', subtitle.activeCues)
+
+type Cues = Expect<Equal<typeof subtitle.cues, SubtitleCue[]>>
+type Switch = Expect<Equal<ReturnType<Subtitle['switch']>, Promise<string | null | undefined>>>
+type Update = Expect<Equal<ReturnType<Subtitle['update']>, void>>
+type Style = Expect<Equal<ReturnType<Subtitle['style']>, HTMLDivElement>>
+export type Assertions = [Cues, Switch, Update, Style]
+
+// @ts-expect-error Subtitle update does not accept registry entries.
+subtitle.update({ name: 'entry' })
+// @ts-expect-error Conversion callbacks produce text synchronously.
+subtitle.switch('/subtitle.vtt', { onVttLoad: async vtt => vtt })