dify

dify/web/app/components/workflow/hooks/use-serial-async-callback.ts

@@ -0,0 +1,22 @@
+import {
+  useCallback,
+  useRef,
+} from 'react'
+
+export const useSerialAsyncCallback = <Args extends any[], Result = void>(
+  fn: (...args: Args) => Promise<Result> | Result,
+  shouldSkip?: () => boolean,
+) => {
+  const queueRef = useRef<Promise<unknown>>(Promise.resolve())
+
+  return useCallback((...args: Args) => {
+    if (shouldSkip?.())
+      return Promise.resolve(undefined as Result)
+
+    const lastPromise = queueRef.current.catch(() => undefined)
+    const nextPromise = lastPromise.then(() => fn(...args))
+    queueRef.current = nextPromise
+
+    return nextPromise
+  }, [fn, shouldSkip])
+}