페이징

src/entities/vat-return/ui/list-wrap.tsx

@@ -16,10 +16,12 @@ import { useVatReturnListMutation } from '../api/use-vat-return-list-mutation';
 import { ListDateGroup } from './list-date-group';
 import { useStore } from '@/shared/model/store';
 import { EmailBottomSheet } from '@/entities/common/ui/email-bottom-sheet';
+import useIntersectionObserver from '@/widgets/intersection-observer';
 
 export const ListWrap = () => {
   const userMid = useStore.getState().UserStore.mid;
 
+  const [onActionIntersect, setOnActionIntersect] = useState<boolean>(false);
   const [filterOn, setFilterOn] = useState<boolean>(false);
   const [sortType, setSortType] = useState<SortTypeKeys>(SortTypeKeys.LATEST);
   const [listItems, setListItems] = useState<Array<VatReturnListContent>>([]);
@@ -33,8 +35,27 @@ export const ListWrap = () => {
   const [emailBottomSheetOn, setEmailBottomSheetOn] = useState<boolean>(false);
 
   const { mutateAsync: vatReturnList } = useVatReturnListMutation();
+  const onIntersect: IntersectionObserverCallback = (entries: Array<IntersectionObserverEntry>) => {
+    entries.forEach((entry: IntersectionObserverEntry) => {
+      if(entry.isIntersecting){
+        console.log('Element is now intersecting with the root. [' + onActionIntersect + ']');
+        if(onActionIntersect && !!pageParam.cursor){
+          callList('page');
+        } 
+      }
+      else{
+        console.log('Element is no longer intersecting with the root.');
+      }
+    });
+  };
 
-  const callList = () => {
+  const { setTarget } = useIntersectionObserver({ 
+    threshold: 1, 
+    onIntersect 
+  });
+
+  const callList = (type?: string) => {
+    setOnActionIntersect(false);
     let params: VatReturnListParams = {
       mid: mid,
       startMonth: startMonth,
@@ -48,7 +69,28 @@ export const ListWrap = () => {
     };
 
     vatReturnList(params).then((rs: VatReturnListResponse) => {
-      setListItems(rs.content);
+      if(type === 'page'){
+        setListItems([
+          ...listItems,
+          ...rs.content
+        ]);
+      }
+      else{
+        setListItems(rs.content);
+      }
+      if(rs.hasNext){
+        setPageParam({
+          ...pageParam,
+          ...{ cursor: rs.nextCursor }
+        });
+        setOnActionIntersect(true);
+      }
+      else{
+        setPageParam({
+          ...pageParam,
+          ...{ cursor: null }
+        });
+      }
     });
   };
   
@@ -152,7 +194,8 @@ export const ListWrap = () => {
         ></SortTypeBox>
       </div>
       <div className="transaction-list">
-      { getListDateGroup() }
+        { getListDateGroup() }
+        <div ref={ setTarget }></div>
       </div>
       <ListFilter
         filterOn={ filterOn }