type: update type unknown with UploadRef (#42985)

* type: update type unknown with UploadRef

* type: fix type

components/upload/Dragger.tsx

@@ -1,12 +1,15 @@
 import * as React from 'react';
-import type { UploadProps } from './interface';
+import type { UploadRef } from './Upload';
 import Upload from './Upload';
+import type { UploadProps } from './interface';
 
 export type DraggerProps = UploadProps & { height?: number };
 
-const Dragger = React.forwardRef<unknown, DraggerProps>(({ style, height, ...restProps }, ref) => (
-  <Upload ref={ref} {...restProps} type="drag" style={{ ...style, height }} />
-));
+const Dragger = React.forwardRef<UploadRef, DraggerProps>(
+  ({ style, height, ...restProps }, ref) => (
+    <Upload ref={ref} {...restProps} type="drag" style={{ ...style, height }} />
+  ),
+);
 
 if (process.env.NODE_ENV !== 'production') {
   Dragger.displayName = 'Dragger';

components/upload/Upload.tsx

@@ -4,11 +4,12 @@ import RcUpload from 'rc-upload';
 import useMergedState from 'rc-util/lib/hooks/useMergedState';
 import * as React from 'react';
 import { flushSync } from 'react-dom';
+import warning from '../_util/warning';
 import { ConfigContext } from '../config-provider';
 import DisabledContext from '../config-provider/DisabledContext';
-import defaultLocale from '../locale/en_US';
 import { useLocale } from '../locale';
-import warning from '../_util/warning';
+import defaultLocale from '../locale/en_US';
+import UploadList from './UploadList';
 import type {
   RcFile,
   ShowUploadListInterface,
@@ -16,16 +17,23 @@ import type {
   UploadFile,
   UploadProps,
 } from './interface';
-import UploadList from './UploadList';
-import { file2Obj, getFileItem, removeFileItem, updateFileList } from './utils';
-
 import useStyle from './style';
+import { file2Obj, getFileItem, removeFileItem, updateFileList } from './utils';
 
 export const LIST_IGNORE = `__LIST_IGNORE_${Date.now()}__`;
 
 export type { UploadProps };
 
-const InternalUpload: React.ForwardRefRenderFunction<unknown, UploadProps> = (props, ref) => {
+export interface UploadRef<T = any> {
+  onBatchStart: RcUploadProps['onBatchStart'];
+  onSuccess: (response: any, file: RcFile, xhr: any) => void;
+  onProgress: (e: { percent: number }, file: RcFile) => void;
+  onError: (error: Error, response: any, file: RcFile) => void;
+  fileList: UploadFile<T>[];
+  upload: RcUpload | null;
+}
+
+const InternalUpload: React.ForwardRefRenderFunction<UploadRef, UploadProps> = (props, ref) => {
   const {
     fileList,
     defaultFileList,
@@ -461,7 +469,7 @@ const InternalUpload: React.ForwardRefRenderFunction<unknown, UploadProps> = (pr
   );
 };
 
-const Upload = React.forwardRef<unknown, UploadProps>(InternalUpload);
+const Upload = React.forwardRef<UploadRef, UploadProps>(InternalUpload);
 
 if (process.env.NODE_ENV !== 'production') {
   Upload.displayName = 'Upload';