set and clear game state using reducers - removed the need for global state management

.env.development

@@ -0,0 +1,4 @@
+DISCORD_CONTACT_WEBHOOK="https://discord.com/api/webhooks/1166012977313497248/bDOfla0XnRgkBfDJYeRKs_QNe8P_S2kzXokuZNsLGfZN1mvfQAecYJlIrOC0qfMTOEpl"
+DISCORD_ERROR_LOG_WEBHOOK="https://discord.com/api/webhooks/1174005798200938618/lLgOihkU9MlYwW2slPOTIK3q1kX80f04BSQbimdhHGFgOrN6zC5s2MlmtlSk8K6POZcJ"
+LICHESS_CLIENT_ID="chess-scribe.org"
+WEBSITE_URL="http://localhost:3000"

package.json

@@ -25,6 +25,7 @@
     "@tanstack/react-start": "latest",
     "@tanstack/router-plugin": "^1.132.0",
     "@unpic/react": "^1.0.2",
+    "jotai": "^2.20.0",
     "lichess-pgn-viewer": "^2.4.5",
     "nitro": "npm:nitro-nightly@latest",
     "react": "^19.2.0",

pnpm-lock.yaml

@@ -38,6 +38,9 @@ importers:
       '@unpic/react':
         specifier: ^1.0.2
         version: 1.0.2(next@16.2.6(@babel/core@7.29.7)(react-dom@19.2.6(react@19.2.6))(react@19.2.6))(react-dom@19.2.6(react@19.2.6))(react@19.2.6)
+      jotai:
+        specifier: ^2.20.0
+        version: 2.20.0(@babel/core@7.29.7)(@babel/template@7.29.7)(@types/react@19.2.15)(react@19.2.6)
       lichess-pgn-viewer:
         specifier: ^2.4.5
         version: 2.4.5
@@ -1605,6 +1608,24 @@ packages:
     resolution: {integrity: sha512-AC/7JofJvZGrrneWNaEnJeOLUx+JlGt7tNa0wZiRPT4MY1wmfKjt2+6O2p2uz2+skll8OZZmJMNqeke7kKbNgQ==}
     hasBin: true
 
+  jotai@2.20.0:
+    resolution: {integrity: sha512-b5GAqgmXmXzB4WPaTH26ppk9Sl7AA9WSQX7yfdM+gJ1rFROiWcVbi97gFuN/yVCojOcbcvop2sfLL+fjxW0JVg==}
+    engines: {node: '>=12.20.0'}
+    peerDependencies:
+      '@babel/core': '>=7.0.0'
+      '@babel/template': '>=7.0.0'
+      '@types/react': '>=17.0.0'
+      react: '>=17.0.0'
+    peerDependenciesMeta:
+      '@babel/core':
+        optional: true
+      '@babel/template':
+        optional: true
+      '@types/react':
+        optional: true
+      react:
+        optional: true
+
   js-tokens@4.0.0:
     resolution: {integrity: sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==}
 
@@ -3559,6 +3580,13 @@ snapshots:
 
   jiti@2.7.0: {}
 
+  jotai@2.20.0(@babel/core@7.29.7)(@babel/template@7.29.7)(@types/react@19.2.15)(react@19.2.6):
+    optionalDependencies:
+      '@babel/core': 7.29.7
+      '@babel/template': 7.29.7
+      '@types/react': 19.2.15
+      react: 19.2.6
+
   js-tokens@4.0.0: {}
 
   js-yaml@4.1.1:

src/components/LichessButton.tsx

@@ -15,6 +15,7 @@ const LichessButton = ({ onClickHandler }: IProps) => {
 					xmlns="http://www.w3.org/2000/svg"
 					fill="currentColor"
 				>
+					<title>Lichess Logo</title>
 					<path d="M38.956.5c-3.53.418-6.452.902-9.286 2.984C5.534 1.786-.692 18.533.68 29.364 3.493 50.214 31.918 55.785 41.329 41.7c-7.444 7.696-19.276 8.752-28.323 3.084C3.959 39.116-.506 27.392 4.683 17.567 9.873 7.742 18.996 4.535 29.03 6.405c2.43-1.418 5.225-3.22 7.655-3.187l-1.694 4.86 12.752 21.37c-.439 5.654-5.459 6.112-5.459 6.112-.574-1.47-1.634-2.942-4.842-6.036-3.207-3.094-17.465-10.177-15.788-16.207-2.001 6.967 10.311 14.152 14.04 17.663 3.73 3.51 5.426 6.04 5.795 6.756 0 0 9.392-2.504 7.838-8.927L37.4 7.171z" />
 				</svg>
 			</div>

src/components/PgnViewer.tsx

@@ -0,0 +1,32 @@
+import LichessPgnViewer from "lichess-pgn-viewer";
+import type PgnViewerType from "lichess-pgn-viewer/pgnViewer";
+import { useEffect, useRef } from "react";
+
+interface IProps {
+	gamePgn: string;
+}
+
+const PgnViewer = ({ gamePgn }: IProps) => {
+	const containerRef = useRef<HTMLDivElement | null>(null);
+	const viewerRef = useRef<PgnViewerType | null>(null);
+
+	useEffect(() => {
+		const element: HTMLElement | null = document.querySelector(".lpv-board");
+		if (!element) return;
+
+		viewerRef.current = LichessPgnViewer(element, {
+			pgn: gamePgn,
+			scrollToMove: false,
+		});
+
+		return () => {
+			if (containerRef.current) {
+				containerRef.current = null;
+			}
+		};
+	}, [gamePgn]);
+
+	return <div ref={containerRef} className="lpv-board" />;
+};
+
+export default PgnViewer;

src/pages/Chessboard.container.tsx

@@ -1,7 +1,81 @@
+import { type ChangeEvent, useReducer, useRef } from "react";
 import Chessboard from "#/pages/Chessboard.tsx";
+import { gameReducer, initialGameState } from "#/reducers/gameReducer.ts";
 
 const ChessboardContainer = () => {
-	return <Chessboard />;
+	const [gameState, gameDispatch] = useReducer(gameReducer, initialGameState);
+	const fileInputRef = useRef<HTMLInputElement | null>(null);
+
+	const handleSavePgn = () => {
+		console.log("Save PGN");
+	};
+
+	const handleSavePdf = () => {
+		console.log("Save PDF");
+	};
+
+	const handleClearGame = () => {
+		if (fileInputRef.current) {
+			fileInputRef.current.value = "";
+		}
+
+		gameDispatch({
+			type: "CLEAR_GAME",
+		});
+	};
+
+	const handleLoadPgn = (e: ChangeEvent<HTMLInputElement>) => {
+		e.preventDefault();
+
+		const selectedFile = e.target.files?.[0];
+
+		if (selectedFile?.name.endsWith(".pgn")) {
+			const reader = new FileReader();
+			reader.onload = (event) => {
+				const pgnData = event.target?.result;
+				let pgnString = "";
+
+				if (pgnData) {
+					if (typeof pgnData === "string") {
+						pgnString = pgnData;
+					} else {
+						pgnString = new TextDecoder().decode(pgnData);
+					}
+				}
+
+				if (pgnString) {
+					gameDispatch({
+						type: "SET_GAME",
+						payload: { pgn: pgnString, headers: "" },
+					});
+				} else {
+					gameDispatch({
+						type: "CLEAR_GAME",
+					});
+				}
+			};
+			reader.readAsText(selectedFile);
+		} else {
+			if (fileInputRef.current) {
+				fileInputRef.current.value = "";
+			}
+			e.target.files = null;
+			gameDispatch({
+				type: "CLEAR_GAME",
+			});
+		}
+	};
+
+	return (
+		<Chessboard
+			gameState={gameState}
+			handleLoadPgn={handleLoadPgn}
+			handleClearGame={handleClearGame}
+			handleSavePgn={handleSavePgn}
+			handleSavePdf={handleSavePdf}
+			fileInputRef={fileInputRef}
+		/>
+	);
 };
 
 export default ChessboardContainer;

src/pages/Chessboard.tsx

@@ -1,13 +1,67 @@
+import type { ChangeEvent, RefObject } from "react";
 import LichessButton from "#/components/LichessButton.tsx";
+import PgnViewer from "#/components/PgnViewer.tsx";
 import Section from "#/components/Section.tsx";
+import type { IGameState } from "#/reducers/gameReducer.ts";
 
-const Chessboard = () => (
-	<main className="px-4 pb-8 place-self-center min-h-[calc(100vh-226px)]">
-		<Section title="Convert PGN to PDF">
-			<LichessButton /> or{" "}
-			<input type="file" id="file-input" className="file-input max-w-xs" />
-		</Section>
-	</main>
-);
+interface IProps {
+	gameState: IGameState;
+	handleLoadPgn: (e: ChangeEvent<HTMLInputElement>) => void;
+	handleClearGame: () => void;
+	handleSavePgn: () => void;
+	handleSavePdf: () => void;
+	fileInputRef: RefObject<HTMLInputElement | null>;
+}
+
+const Chessboard = ({
+	gameState,
+	handleLoadPgn,
+	handleClearGame,
+	handleSavePgn,
+	handleSavePdf,
+	fileInputRef,
+}: IProps) => {
+	return (
+		<main className="px-4 pb-8 place-self-center min-h-[calc(100vh-226px)]">
+			<Section title="Convert PGN to PDF">
+				<LichessButton /> or{" "}
+				<input
+					type="file"
+					id="file-input"
+					ref={fileInputRef}
+					className="file-input max-w-xs"
+					onChange={handleLoadPgn}
+				/>
+			</Section>
+
+			<div className="flex gap-4">
+				<button
+					className="cursor-pointer"
+					type="button"
+					onClick={handleClearGame}
+				>
+					Clear Game
+				</button>
+
+				<button
+					className="cursor-pointer"
+					type="button"
+					onClick={handleSavePgn}
+				>
+					Save PGN
+				</button>
+
+				<button
+					className="cursor-pointer"
+					type="button"
+					onClick={handleSavePdf}
+				>
+					Save PDF
+				</button>
+			</div>
+			<PgnViewer gamePgn={gameState.pgn || ""} />
+		</main>
+	);
+};
 
 export default Chessboard;

src/reducers/gameReducer.ts

@@ -0,0 +1,38 @@
+interface IDiagrams {
+	ply: number;
+	fen: string;
+}
+
+export interface IGameState {
+	pgn: string;
+	headers: string;
+	diagrams: IDiagrams[];
+	diagramClock: boolean;
+}
+
+type GameAction =
+	| { type: "SET_GAME"; payload: { pgn: string; headers: "" } }
+	| { type: "CLEAR_GAME" };
+
+export const initialGameState = {
+	pgn: "",
+	headers: "",
+	diagrams: [],
+	diagramClock: false,
+};
+
+export const gameReducer = (state: IGameState, action: GameAction) => {
+	switch (action.type) {
+		case "SET_GAME":
+			return {
+				pgn: action.payload.pgn,
+				headers: "",
+				diagrams: [],
+				diagramClock: false,
+			};
+		case "CLEAR_GAME":
+			return initialGameState;
+		default:
+			return state;
+	}
+};

src/styles.css

@@ -1,6 +1,7 @@
 @import "tailwindcss";
-@import "./styles/_accordion.css";
+@import "styles/_accordion.css";
 @import "./styles/_file-input.css";
+@import './styles/_pgn-viewer.css';
 
 @plugin "@tailwindcss/typography";
 

src/styles/_pgn-viewer.css

@@ -0,0 +1,7 @@
+@import "./vendor/lichess-pgn-viewer.css";
+
+.lpv-board {
+	max-width: 600px;
+	--board-color: #b58863;
+	font-family: "Noto Sans", sans-serif;
+}