chore: rename fundamentals to base (#9119)

packages/backend/server/src/base/utils/promise.ts

@@ -0,0 +1,50 @@
+import { defer as rxjsDefer, retry } from 'rxjs';
+
+export class RetryablePromise<T> extends Promise<T> {
+  constructor(
+    executor: (
+      resolve: (value: T | PromiseLike<T>) => void,
+      reject: (reason?: any) => void
+    ) => void,
+    retryTimes: number = 3,
+    retryIntervalInMs: number = 300
+  ) {
+    super((resolve, reject) => {
+      rxjsDefer(() => new Promise<T>(executor))
+        .pipe(
+          retry({
+            count: retryTimes,
+            delay: retryIntervalInMs,
+          })
+        )
+        .subscribe({
+          next: v => {
+            resolve(v);
+          },
+          error: e => {
+            reject(e);
+          },
+        });
+    });
+  }
+}
+
+export function retryable<Ret = unknown>(
+  asyncFn: () => Promise<Ret>,
+  retryTimes = 3,
+  retryIntervalInMs = 300
+): Promise<Ret> {
+  return new RetryablePromise<Ret>(
+    (resolve, reject) => {
+      asyncFn().then(resolve).catch(reject);
+    },
+    retryTimes,
+    retryIntervalInMs
+  );
+}
+
+export function defer(dispose: () => Promise<void>) {
+  return {
+    [Symbol.asyncDispose]: dispose,
+  };
+}