Display avatar in pong

backend/.gitignore

@@ -9,6 +9,7 @@
 !/public/avatar/shongou.jpg
 !/public/avatar/kakiba.jpg
 !/public/avatar/thara.jpg
+!/public/avatar/undefined.jpg
 
 # Logs
 logs

backend/src/events/events.gateway.ts

@@ -112,7 +112,14 @@ export class EventsGateway implements OnGatewayDisconnect {
     client.join(gameId);
 
     if (!isPlayer) {
-      this.emitUpdateStatus(client, 'joined-as-viewer');
+      this.emitUpdateStatus(client, 'joined-as-viewer', {
+        players: Object.keys(this.players[gameId] || {}).map(
+          (socketId, playerNumber) => ({
+            playerNumber,
+            user: this.users[socketId],
+          }),
+        ),
+      });
       return;
     }
 
@@ -127,10 +134,16 @@ export class EventsGateway implements OnGatewayDisconnect {
       return;
     }
     addPlayer(this.players, gameId, client.id);
-    this.emitUpdateStatusToRoomId(client, gameId, 'friend-joined');
+    this.emitUpdateStatusToRoomId(client, gameId, 'friend-joined', {
+      playerNumber: this.players[gameId][client.id],
+      user,
+    });
     this.emitUpdateStatus(client, 'joined-as-player');
-    if (Object.keys(this.players[gameId]).length == 2) {
-      this.emitUpdateStatus(client, 'ready');
+    const opponent = getOpponent(this.players, gameId, client.id);
+    if (opponent) {
+      this.emitUpdateStatus(client, 'ready', {
+        user: this.users[opponent],
+      });
     }
     this.lostPoints[client.id] = 0;
     return;
@@ -144,7 +157,9 @@ export class EventsGateway implements OnGatewayDisconnect {
     delete this.users[client.id];
 
     if (isPlayer(this.players, roomId, client.id)) {
-      this.emitUpdateStatusToRoomId(client, roomId, 'friend-left');
+      this.emitUpdateStatusToRoomId(client, roomId, 'friend-left', {
+        playerNumber: this.players[roomId][client.id],
+      });
       removePlayer(this.players, roomId, client.id);
       delete this.lostPoints[client.id];
     }
@@ -296,12 +311,17 @@ export class EventsGateway implements OnGatewayDisconnect {
     else socket.to(roomId).emit(eventName);
   }
 
-  emitUpdateStatus(socket: Socket, status: Status) {
-    socket.emit('update-status', status);
+  emitUpdateStatus(socket: Socket, status: Status, payload: any = null) {
+    socket.emit('update-status', { status, payload });
   }
 
-  emitUpdateStatusToRoomId(socket: Socket, roomId: string, status: Status) {
-    socket.to(roomId).emit('update-status', status);
+  emitUpdateStatusToRoomId(
+    socket: Socket,
+    roomId: string,
+    status: Status,
+    payload: any = null,
+  ) {
+    socket.to(roomId).emit('update-status', { status, payload });
   }
 
   async createHistory(socket: Socket) {

frontend/app/pong/GameList.tsx

@@ -6,10 +6,12 @@ import { useToast } from "@/components/ui/use-toast";
 import { useCallback, useEffect, useMemo, useState } from "react";
 import { IoRefresh } from "react-icons/io5";
 import { io } from "socket.io-client";
-import { GameCard } from "./GameCard";
+import { GameCard } from "../ui/pong/GameCard";
+import { useRouter } from "next/navigation";
 
 export default function GameList() {
   const socket = useMemo(() => io("/pong", { forceNew: true }), []);
+  const router = useRouter();
 
   const [games, setGames] = useState([]);
   const { toast } = useToast();
@@ -34,19 +36,27 @@ export default function GameList() {
         <CardHeader>
           <CardTitle>Ongoing games</CardTitle>
         </CardHeader>
-        <CardContent className="flex flex-col items-center">
+        <CardContent className="flex flex-col items-center gap-5">
           <Button variant="ghost" onClick={requestListingGames}>
             <IoRefresh />
           </Button>
           {games.length === 0 ? (
             <p>No ongoing games</p>
           ) : (
             games.map((game: any, index: number) => (
-              <GameCard
-                key={game.roomId}
-                roomId={game.roomId}
-                players={game.players}
-              />
+              <div key={game.roomID} className="flex flex-col align-middle">
+                <GameCard
+                  leftPlayer={game.players[0]}
+                  rightPlayer={game.players[1]}
+                />
+                <Button
+                  onClick={() =>
+                    router.push(`/pong/${game.roomId}?mode=viewer`)
+                  }
+                >
+                  View
+                </Button>
+              </div>
             ))
           )}
         </CardContent>

frontend/app/pong/[id]/PongBoard.tsx

@@ -10,6 +10,7 @@ import { io } from "socket.io-client";
 import { PongGame } from "./PongGame";
 import PongInformationBoard from "./PongInformationBoard";
 import { CANVAS_HEIGHT, CANVAS_WIDTH, TARGET_FRAME_MS } from "./const";
+import { PublicUserEntity } from "@/app/lib/dtos";
 
 type Status =
   | "too-many-players"
@@ -84,13 +85,29 @@ function PongBoard({ id }: PongBoardProps) {
   const gameRef = useRef<PongGame | null>(null); // only initialized once
   const socketRef = useRef<Socket | null>(null); // updated on `id` change
   const [startDisabled, setStartDisabled] = useState(true);
-  const [practiceDisabled, setPracticeDisabled] = useState(true);
-  const [battleDisabled] = useState(true);
   const { resolvedTheme } = useTheme();
   const defaultColor = "hsl(0, 0%, 0%)";
 
   const { currentUser } = useAuthContext();
 
+  const [leftPlayer, setLeftPlayer] = useState<PublicUserEntity | undefined>(
+    () => (userMode === "player" ? currentUser : undefined),
+  );
+  const [rightPlayer, setRightPlayer] = useState<PublicUserEntity | undefined>(
+    undefined,
+  );
+
+  const getPlayerSetterFromPlayerNumber = useCallback(
+    (playerNumber: number) => {
+      return userMode == "player"
+        ? setRightPlayer
+        : playerNumber == 1
+          ? setLeftPlayer
+          : setRightPlayer;
+    },
+    [userMode],
+  );
+
   const getGame = useCallback(() => {
     const ctx = canvasRef.current?.getContext("2d");
     if (!ctx) {
@@ -127,7 +144,7 @@ function PongBoard({ id }: PongBoardProps) {
   }, [getGame, userMode]);
 
   const runSideEffectForStatusUpdate = useCallback(
-    (status: Status) => {
+    (status: Status, payload: any) => {
       const game = getGame();
 
       switch (status) {
@@ -140,17 +157,39 @@ function PongBoard({ id }: PongBoardProps) {
           setUserMode("viewer");
           break;
         case "friend-joined":
+          const { playerNumber, user } = payload;
+          const setter = getPlayerSetterFromPlayerNumber(playerNumber);
+          setter(user);
           currentUser && setStartDisabled(false);
-          setPracticeDisabled(true);
           game.resetPlayerPosition();
           break;
         case "friend-left":
-          setStartDisabled(true);
-          setPracticeDisabled(false);
+          {
+            const { playerNumber } = payload;
+            const setter = getPlayerSetterFromPlayerNumber(playerNumber);
+            setter(undefined);
+            setStartDisabled(true);
+          }
+          break;
+        case "joined-as-viewer":
+          {
+            const { players } = payload;
+            players.forEach(({ playerNumber, user }: any) => {
+              const setter = getPlayerSetterFromPlayerNumber(playerNumber);
+              setter(user);
+            });
+          }
           break;
+        case "ready": {
+          {
+            const { user } = payload;
+            setRightPlayer(user);
+          }
+          break;
+        }
       }
     },
-    [currentUser, setUserMode, getGame],
+    [currentUser, setUserMode, getGame, getPlayerSetterFromPlayerNumber],
   );
 
   useEffect(() => {
@@ -212,8 +251,14 @@ function PongBoard({ id }: PongBoardProps) {
       socket.emit(action);
     };
 
-    const handleUpdateStatus = (status: Status) => {
-      runSideEffectForStatusUpdate(status);
+    const handleUpdateStatus = ({
+      status,
+      payload,
+    }: {
+      status: Status;
+      payload: any;
+    }) => {
+      runSideEffectForStatusUpdate(status, payload);
       const log = getLogFromStatus(status);
       setLogs((logs) => [...logs, log]);
     };
@@ -325,6 +370,8 @@ function PongBoard({ id }: PongBoardProps) {
           player2Position={player2Position}
           logs={logs}
           userMode={userMode}
+          leftPlayer={leftPlayer}
+          rightPlayer={rightPlayer}
         />
       </div>
     </div>

frontend/app/pong/[id]/PongInformationBoard.tsx

@@ -1,12 +1,17 @@
 "use client";
 
+import { PublicUserEntity } from "@/app/lib/dtos";
+import { GameCard } from "@/app/ui/pong/GameCard";
+
 interface PongInformationBoardProps {
   fps: number;
   speed: number;
   player1Position: number;
   player2Position: number;
   logs: string[];
   userMode: "viewer" | "player";
+  leftPlayer?: PublicUserEntity;
+  rightPlayer?: PublicUserEntity;
 }
 
 export default function PongInformationBoard({
@@ -16,9 +21,12 @@ export default function PongInformationBoard({
   player2Position,
   logs,
   userMode,
+  leftPlayer,
+  rightPlayer,
 }: PongInformationBoardProps) {
   return (
     <div className="overflow-hidden flex-grow flex flex-col gap-1">
+      <GameCard leftPlayer={leftPlayer} rightPlayer={rightPlayer}></GameCard>
       <div>You are a {userMode}</div>
       <div id="fps">FPS: {fps}</div>
       <div id="speed">Speed: {speed}</div>

frontend/app/pong/GameCard.tsx → frontend/app/ui/pong/GameCard.tsx

@@ -4,49 +4,45 @@ import { Avatar } from "@/app/ui/user/avatar";
 import { Button } from "@/components/ui/button";
 import { Card } from "@/components/ui/card";
 import { TooltipProvider } from "@radix-ui/react-tooltip";
-import { useRouter } from "next/navigation";
-import { PublicUserEntity } from "../lib/dtos";
+import { PublicUserEntity } from "../../lib/dtos";
 
-function UserCard({ user }: { user: PublicUserEntity }) {
+function UserCard({ user }: { user?: PublicUserEntity }) {
+  const name = user?.name || "";
+  const avatarUrl = user?.avatarURL || "/avatar/undefined.jpg";
+  const href = user ? `/user/${user.id}` : undefined;
+  const id = user?.id;
   return (
     <>
       <div className="flex gap-4 items-center">
-        {user.name}
+        {name}
         <Avatar
-          avatarURL={user.avatarURL}
+          avatarURL={avatarUrl}
           size="medium"
-          href={`/user/${user.id}`}
-          alt={user.name}
-          id={user.id}
+          href={href}
+          alt={name}
+          id={id}
         />
       </div>
     </>
   );
 }
 
 export function GameCard({
-  roomId,
-  players,
+  leftPlayer,
+  rightPlayer,
 }: {
-  roomId: string;
-  players: PublicUserEntity[];
+  leftPlayer?: PublicUserEntity;
+  rightPlayer?: PublicUserEntity;
 }) {
-  const router = useRouter();
-
-  const handleView = () => {
-    router.push(`/pong/${roomId}?mode=viewer`);
-  };
-
   return (
     <Card className="w-[350px] p-4 flex flex-col gap-2 items-center">
       <div className="flex gap-10 items-center justify-evenly">
         <TooltipProvider delayDuration={0}>
-          <UserCard user={players[0]} />
+          <UserCard user={leftPlayer} />
           {" vs "}
-          <UserCard user={players[1]} />
+          <UserCard user={rightPlayer} />
         </TooltipProvider>
       </div>
-      <Button onClick={handleView}>View</Button>
     </Card>
   );
 }