refactor(danmuku): [PKG-DANMUKU-06] migrate runtime and preserve public types

packages/artplayer-plugin-danmuku/src/queue.ts

@@ -0,0 +1,28 @@
+import type { DanmuItem, DanmuState } from './types'
+
+interface QueueOwner { states: Record<DanmuState, DanmuItem[]>, art: { currentTime: number } }
+
+export function filterState(owner: QueueOwner, state: DanmuState, callback: (danmu: DanmuItem) => void) {
+  const danmus = owner.states[state] || []
+  for (let index = 0; index < danmus.length; index++) callback(danmus[index]!)
+  return danmus
+}
+
+export function readyItems(owner: QueueOwner) {
+  const { currentTime } = owner.art
+  const result: DanmuItem[] = []
+  filterState(owner, 'ready', danmu => result.push(danmu))
+  filterState(owner, 'wait', (danmu) => {
+    if (currentTime + 0.1 >= danmu.time && danmu.time >= currentTime - 0.1)
+      result.push(danmu)
+  })
+  return result
+}
+
+export function setItemState(owner: QueueOwner, danmu: DanmuItem, state: DanmuState) {
+  owner.states[danmu.$state] = owner.states[danmu.$state].filter(item => item !== danmu)
+  danmu.$state = state
+  if (danmu.$ref)
+    danmu.$ref.dataset.state = state
+  owner.states[state].push(danmu)
+}