refactor(multiple-subtitles): [PKG-MULTI-SUB-04] type runtime modules and vendor boundaries

packages/artplayer-plugin-multiple-subtitles/src/lifetime.ts

@@ -0,0 +1,50 @@
+import type { Cleanup, Lifetime, LifetimeHost } from './types'
+
+export default function createLifetime(art: LifetimeHost): Lifetime {
+  let closed = Boolean(art.isDestroy)
+  const cleanups = new Set<Cleanup>()
+  let cancel!: Cleanup
+  const cancelled = new Promise<void>((resolve) => {
+    cancel = resolve
+  })
+  function run(cleanup: Cleanup): void {
+    try {
+      cleanup()
+    }
+    catch (error) {
+      console.warn('Failed to clean up multiple subtitles:', error)
+    }
+  }
+  const lifetime: Lifetime = {
+    get closed() { return closed },
+    own(cleanup) {
+      if (closed)
+        run(cleanup)
+      else
+        cleanups.add(cleanup)
+      return () => cleanups.delete(cleanup)
+    },
+    wait(value) { return Promise.race([value, cancelled]) },
+    dispose() {
+      if (closed)
+        return
+      closed = true
+      cancel()
+      const pending = [...cleanups].reverse()
+      cleanups.clear()
+      for (const cleanup of pending)
+        run(cleanup)
+    },
+  }
+  if (!closed) {
+    lifetime.own(() => art.off('destroy', lifetime.dispose))
+    try {
+      art.on('destroy', lifetime.dispose)
+    }
+    catch (error) {
+      lifetime.dispose()
+      throw error
+    }
+  }
+  return lifetime
+}