From d7f4d59116a898010912545b31f29619c56384f3 Mon Sep 17 00:00:00 2001
From: ilyayudovin <ilyayudovin123@gmail.com>
Date: Sat, 4 Jul 2020 22:38:51 +0300
Subject: feat: add loader

---
 src/components/Feed/Feed.tsx | 68 +++++++++++++++++++++++++++-----------------
 1 file changed, 42 insertions(+), 26 deletions(-)

(limited to 'src/components/Feed/Feed.tsx')

diff --git a/src/components/Feed/Feed.tsx b/src/components/Feed/Feed.tsx
index afa914d..a56d57e 100644
--- a/src/components/Feed/Feed.tsx
+++ b/src/components/Feed/Feed.tsx
@@ -1,8 +1,9 @@
 import React from 'react';
 import { Poll } from 'which-types';
 import { WindowScroller, AutoSizer, List } from 'react-virtualized';
-
+import CircularProgress from '@material-ui/core/CircularProgress';
 import PollCard from '../PollCard/PollCard';
+import {makeStyles} from "@material-ui/core";
 
 interface PropTypes {
   polls: Poll[];
@@ -14,7 +15,18 @@ interface RenderPropTypes {
   style: React.CSSProperties;
 }
 
+const useStyles = makeStyles(theme => ({
+  loader: {
+    width:'100%',
+    textAlign:'center',
+    marginTop:theme.spacing(10)
+  }
+}));
+
 const Feed: React.FC<PropTypes> = ({ polls }) => {
+  const classes = useStyles();
+
+
   const RenderItem: React.FC<RenderPropTypes> = ({ index, style, key }) => {
     const poll = polls[index];
     return (
@@ -24,37 +36,41 @@ const Feed: React.FC<PropTypes> = ({ polls }) => {
     );
   };
 
-  return (
-    <WindowScroller>
-      {({
+  const loader = <div className={classes.loader}>
+    <CircularProgress color="primary" style={{margin: '0 auto'}}/>
+  </div>
+
+  const list =  <WindowScroller>
+    {({
         height,
         isScrolling,
         registerChild,
         onChildScroll,
         scrollTop
       }) => (
-        <AutoSizer disableHeight>
-          {({ width }) => (
-            <div ref={registerChild}>
-              <List
-                autoHeight
-                height={height}
-                isScrolling={isScrolling}
-                onScroll={onChildScroll}
-                rowCount={polls.length}
-                rowHeight={550}
-                rowRenderer={RenderItem}
-                scrollTop={scrollTop}
-                width={width}
-                containerStyle={{ pointerEvents: 'auto' }}
-                overscanRowCount={1}
-              />
-            </div>
-          )}
-        </AutoSizer>
-      )}
-    </WindowScroller>
-  );
+      <AutoSizer disableHeight>
+        {({ width }) => (
+          <div ref={registerChild}>
+            <List
+              autoHeight
+              height={height}
+              isScrolling={isScrolling}
+              onScroll={onChildScroll}
+              rowCount={polls.length}
+              rowHeight={550}
+              rowRenderer={RenderItem}
+              scrollTop={scrollTop}
+              width={width}
+              containerStyle={{ pointerEvents: 'auto' }}
+              overscanRowCount={1}
+            />
+          </div>
+        )}
+      </AutoSizer>
+    )}
+  </WindowScroller>
+
+  return polls.length ? list : loader;
 };
 
 export default Feed;
-- 
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