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

packages/artplayer-plugin-danmuku/src/bilibili-parser.ts

@@ -0,0 +1,58 @@
+import type { ParsedDanmu, ParserReply, ParserRequest } from './parser-types'
+
+export function getMode(key: number): number {
+  switch (key) {
+    case 1:
+    case 2:
+    case 3:
+      return 0
+    case 4:
+      return 2
+    case 5:
+      return 1
+    default:
+      return 0
+  }
+}
+
+export function bilibiliDanmuParseFromXml(xmlString: unknown): ParsedDanmu[] {
+  if (typeof xmlString !== 'string')
+    return []
+  const reg = /<d[^>]*?p="(?<p>[^"]+)"[^>]*>(?<text>.*?)<\/d>/gs
+  const matches = xmlString.matchAll(reg)
+  return Array.from(matches)
+    .map((match) => {
+      const attr = match.groups!.p!.split(',')
+      if (attr.length >= 8) {
+        const text = match.groups!.text!
+          .trim()
+          .replaceAll('&quot;', '"')
+          .replaceAll('&apos;', '\'')
+          .replaceAll('&lt;', '<')
+          .replaceAll('&gt;', '>')
+          .replaceAll('&amp;', '&')
+
+        return {
+          text,
+          time: Number(attr[0]),
+          mode: getMode(Number(attr[1])),
+          fontSize: Number(attr[2]),
+          color: `#${Number(attr[3]).toString(16)}`,
+          timestamp: Number(attr[4]),
+          pool: Number(attr[5]),
+          userID: attr[6]!,
+          rowID: Number(attr[7]),
+        }
+      }
+      else {
+        return null
+      }
+    })
+    .filter(Boolean) as ParsedDanmu[]
+}
+
+export function onmessage({ data }: MessageEvent<ParserRequest>) {
+  const { xml, id } = data
+  const danmus = bilibiliDanmuParseFromXml(xml)
+  globalThis.postMessage({ danmus, id } satisfies ParserReply)
+}