feat(api): implement chronocat.internal.assets.get

packages/engine-chronocat-api/src/api/internal/assets/get.ts

@@ -0,0 +1,31 @@
+import type { Media } from '@chronocat/red'
+import { ChatType } from '@chronocat/red'
+import type { ChronocatContext } from '@chronocat/shell'
+import { downloadRichMedia } from '../../../definitions/msgService'
+import { richMediaDownloadMap } from '../../../globalVars'
+
+export const buildAssetsGet =
+  (ctx: ChronocatContext) => async (raw: string) => {
+    const data = JSON.parse(
+      Buffer.from(raw, 'base64url').toString('utf-8'),
+    ) as Media
+
+    const downloadId = data.msgId + '::' + data.elementId
+
+    const downloadCompletePromise = new Promise<string>((res, rej) => {
+      richMediaDownloadMap[downloadId] = res
+      void ctx.chronocat.sleep(1000).then(rej)
+    })
+
+    if (data.chatType === ChatType.Private && !data.peerUid.startsWith('u_'))
+      data.peerUid = ctx.chronocat.uix.getUid(data.peerUid)!
+
+    await downloadRichMedia({
+      getReq: {
+        ...data,
+        downloadType: 1,
+      },
+    })
+
+    return await downloadCompletePromise
+  }