From 22b4afbb34829e5553441cdddabe90c25c29d8de Mon Sep 17 00:00:00 2001
From: harshithpabbati <pabbatiharshith@gmail.com>
Date: Thu, 30 Dec 2021 14:00:52 +0530
Subject: [PATCH] Update the grid layout whenever someone screenshares (uses
 participant bar)

---
 custom/fitness-demo/components/App/App.js     | 59 ++++++++++++---
 .../fitness-demo/components/Call/VideoGrid.js | 71 ++++++++++++++++---
 custom/fitness-demo/pages/_app.js             |  2 +-
 .../ParticipantBar/ParticipantBar.js          |  2 +-
 4 files changed, 113 insertions(+), 21 deletions(-)

diff --git a/custom/fitness-demo/components/App/App.js b/custom/fitness-demo/components/App/App.js
index a0b0d71..4fd540d 100644
--- a/custom/fitness-demo/components/App/App.js
+++ b/custom/fitness-demo/components/App/App.js
@@ -1,13 +1,54 @@
-import React from 'react';
+import React, { useMemo } from 'react';
+import ExpiryTimer from '@custom/shared/components/ExpiryTimer';
+import { useCallState } from '@custom/shared/contexts/CallProvider';
+import { useCallUI } from '@custom/shared/hooks/useCallUI';
+import PropTypes from 'prop-types';
 
-import App from '@custom/basic-call/components/App';
 import { ChatProvider } from '../../contexts/ChatProvider';
+import Room from '../Call/Room';
+import { Asides } from './Asides';
+import { Modals } from './Modals';
 
-// Extend our basic call app component with the chat context
-export const CustomApp = () => (
-  <ChatProvider>
-    <App />
-  </ChatProvider>
-);
+export const App = ({ customComponentForState }) => {
+  const { roomExp, state } = useCallState();
 
-export default CustomApp;
+  const componentForState = useCallUI({
+    state,
+    room: <Room />,
+    ...customComponentForState,
+  });
+
+  // Memoize children to avoid unnecassary renders from HOC
+  return useMemo(
+    () => (
+      <>
+        <ChatProvider>
+          {roomExp && <ExpiryTimer expiry={roomExp} />}
+          <div className="app">
+            {componentForState()}
+            <Modals />
+            <Asides />
+            <style jsx>{`
+              color: white;
+              height: 100vh;
+              display: flex;
+              align-items: center;
+              justify-content: center;
+  
+              .loader {
+                margin: 0 auto;
+              }
+            `}</style>
+          </div>
+        </ChatProvider>
+      </>
+    ),
+    [componentForState, roomExp]
+  );
+};
+
+App.propTypes = {
+  customComponentForState: PropTypes.any,
+};
+
+export default App;
\ No newline at end of file
diff --git a/custom/fitness-demo/components/Call/VideoGrid.js b/custom/fitness-demo/components/Call/VideoGrid.js
index 7a3fddc..1e3f60c 100644
--- a/custom/fitness-demo/components/Call/VideoGrid.js
+++ b/custom/fitness-demo/components/Call/VideoGrid.js
@@ -1,9 +1,13 @@
 import React, { useState, useMemo, useEffect, useRef } from 'react';
+import ParticipantBar from '@custom/shared/components/ParticipantBar';
 import Tile from '@custom/shared/components/Tile';
 import { DEFAULT_ASPECT_RATIO } from '@custom/shared/constants';
+import { useCallState } from '@custom/shared/contexts/CallProvider';
 import { useParticipants } from '@custom/shared/contexts/ParticipantsProvider';
 import { useDeepCompareMemo } from 'use-deep-compare';
 
+const SIDEBAR_WIDTH = 186;
+
 /**
  * Basic unpaginated video tile grid, scaled by aspect ratio
  *
@@ -18,7 +22,8 @@ import { useDeepCompareMemo } from 'use-deep-compare';
 export const VideoGrid = React.memo(
   () => {
     const containerRef = useRef();
-    const { allParticipants } = useParticipants();
+    const { allParticipants, participants, screens, localParticipant } = useParticipants();
+    const { showLocalVideo } = useCallState();
     const [dimensions, setDimensions] = useState({
       width: 1,
       height: 1,
@@ -45,10 +50,12 @@ export const VideoGrid = React.memo(
       };
     }, []);
 
+    const hasScreenshares = useMemo(() => screens.length > 0, [screens]);
+
     // Basic brute-force packing algo
     const layout = useMemo(() => {
       const aspectRatio = DEFAULT_ASPECT_RATIO;
-      const tileCount = allParticipants.length || 0;
+      const tileCount = hasScreenshares ? screens.length : participants.length || 0;
       const w = dimensions.width;
       const h = dimensions.height;
 
@@ -87,29 +94,73 @@ export const VideoGrid = React.memo(
       }
 
       return bestLayout;
-    }, [dimensions, allParticipants]);
+    }, [hasScreenshares, screens.length, participants.length, dimensions.width, dimensions.height]);
+
+    const otherParticipants = useMemo(
+      () => participants.filter(({ isLocal }) => !isLocal),
+      [participants]
+    );
+
+    const fixedItems = useMemo(() => {
+      const items = [];
+      if (showLocalVideo) {
+        items.push(localParticipant);
+      }
+      if (hasScreenshares && otherParticipants.length > 0) {
+        items.push(otherParticipants[0]);
+      }
+      return items;
+    }, [hasScreenshares, localParticipant, otherParticipants, showLocalVideo]);
+
+    const otherItems = useMemo(() => {
+      if (otherParticipants.length > 1) {
+        return otherParticipants.slice(hasScreenshares ? 1 : 0);
+      }
+      return [];
+    }, [hasScreenshares, otherParticipants]);
 
     // Memoize our tile list to avoid unnecassary re-renders
     const tiles = useDeepCompareMemo(
       () =>
-        allParticipants.map((p) => (
+        participants.map((p) => (
           <Tile
             participant={p}
             key={p.id}
-            mirrored={!p.isScreenshare}
+            mirrored
             style={{ maxWidth: layout.width, maxHeight: layout.height }}
           />
         )),
-      [layout, allParticipants]
+      [layout, participants]
     );
 
-    if (!allParticipants.length) {
-      return null;
-    }
+    const screenShareTiles = useDeepCompareMemo(
+      () =>
+        screens.map((p) => (
+          <Tile
+            participant={p}
+            key={p.id}
+            mirrored={false}
+            style={{ maxWidth: layout.width, maxHeight: layout.height }}
+          />
+        )),
+      [layout, screens]
+    );
+
+    if (!participants.length) return null;
 
     return (
       <div className="video-grid" ref={containerRef}>
-        <div className="tiles">{tiles}</div>
+        <div className="tiles">
+          {screenShareTiles}
+          {!hasScreenshares && tiles}
+        </div>
+        {hasScreenshares && (
+          <ParticipantBar
+            fixed={fixedItems}
+            others={otherItems}
+            width={SIDEBAR_WIDTH}
+          />
+        )}
         <style jsx>{`
           .video-grid {
             align-items: center;
diff --git a/custom/fitness-demo/pages/_app.js b/custom/fitness-demo/pages/_app.js
index 24eab68..0cf0087 100644
--- a/custom/fitness-demo/pages/_app.js
+++ b/custom/fitness-demo/pages/_app.js
@@ -2,7 +2,7 @@ import React from 'react';
 import GlobalStyle from '@custom/shared/components/GlobalStyle';
 import Head from 'next/head';
 import PropTypes from 'prop-types';
-import { CustomApp } from '../components/App/App';
+import { App as CustomApp } from '../components/App/App';
 import ChatAside from '../components/Call/ChatAside';
 import Tray from '../components/Tray';
 
diff --git a/custom/shared/components/ParticipantBar/ParticipantBar.js b/custom/shared/components/ParticipantBar/ParticipantBar.js
index 781b76a..6b2e27e 100644
--- a/custom/shared/components/ParticipantBar/ParticipantBar.js
+++ b/custom/shared/components/ParticipantBar/ParticipantBar.js
@@ -5,7 +5,7 @@ import React, {
   useRef,
   useState,
 } from 'react';
-import { Tile } from '@custom/shared/components/Tile';
+import Tile from '@custom/shared/components/Tile';
 import { DEFAULT_ASPECT_RATIO } from '@custom/shared/constants';
 import { useCallState } from '@custom/shared/contexts/CallProvider';
 import { useParticipants } from '@custom/shared/contexts/ParticipantsProvider';