monorepo packages (#344)

projects/app/src/service/common/stream.ts

@@ -0,0 +1,39 @@
+import type { NextApiResponse } from 'next';
+
+export function responseWriteController({
+  res,
+  readStream
+}: {
+  res: NextApiResponse;
+  readStream: any;
+}) {
+  res.on('drain', () => {
+    readStream.resume();
+  });
+
+  return (text: string) => {
+    const writeResult = res.write(text);
+    if (!writeResult) {
+      readStream.pause();
+    }
+  };
+}
+
+export function responseWrite({
+  res,
+  write,
+  event,
+  data
+}: {
+  res?: NextApiResponse;
+  write?: (text: string) => void;
+  event?: string;
+  data: string;
+}) {
+  const Write = write || res?.write;
+
+  if (!Write) return;
+
+  event && Write(`event: ${event}\n`);
+  Write(`data: ${data}\n\n`);
+}