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annotate react_games/src/Robot/main.tsx @ 71:75de5903355c

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Giagantic changes that update Dowa library to be more align with stb style array and hashmap. Updated Seobeo to be caching on server side instead of file level caching. Deleted bunch of things I don't really use.
author June Park <parkjune1995@gmail.com>
date Sun, 28 Dec 2025 20:34:22 -0800
parents fb9bcd3145cb
children
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fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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1 /**
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2 * Scenario
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3 * Design a miniature browser game in which a single “robot” sprite navigates a
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4 * rectangular grid to reach a goal while avoiding obstacles. Everything—from bootstrapping the project
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5 * to shipping a playable, restartable game—must be accomplished within one hour.
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6 *
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7 *
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8 * Grid 10 x 10
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9 * Robot top left corner
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10 * Obstical is going to be 10
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11 *
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12 * one of the grid is going to be the goal
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13 *
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14 * Movement logic keyboard or WASD okay
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15 */
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16
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17 import React, { CSSProperties, memo, useEffect, useReducer } from "react";
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18
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19 enum CellValue {
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20 PLAYER,
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21 GOAL,
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22 OBSTICAL,
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23 EMPTY
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24 }
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25
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26 interface Cell {
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27 value: CellValue;
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28 }
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29
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30 interface RowProp {
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31 rowValue: Cell[];
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32 }
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33
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34 interface CellComponentProp {
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35 cell: Cell;
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36 }
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37
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38 enum GameStatus {
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39 PLAYABLE,
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40 WON,
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41 }
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42
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43 interface RobotState {
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44 x: number;
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45 y: number,
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46 }
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47
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48 interface GameState {
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49 board: Cell[][];
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50 status: GameStatus;
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51 robotState: RobotState;
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52 }
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53
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54 enum GameActionType {
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55 MOVE,
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56 RESET,
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57 }
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58
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59 type GameAction = {type: GameActionType.MOVE, command: string } | { type: GameActionType.RESET }
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60
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61 const MAX_WIDTH: number = 10;
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62 const MAX_COLUMN: number = 10;
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63 const BOARD: Cell[][] = Array.from(
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64 { length: MAX_WIDTH },
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65 () => Array(MAX_COLUMN).fill({value: CellValue.EMPTY})
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66 );
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67
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68 BOARD[0][0] = {
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69 value: CellValue.PLAYER
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70 }
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71 BOARD[0][5] = {
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72 value: CellValue.OBSTICAL
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73 }
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74 BOARD[6][5] = {
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75 value: CellValue.GOAL
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76 }
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77
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78
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79 const getCellValue = (cell: Cell) => {
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80 switch(cell.value) {
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81 case CellValue.EMPTY:
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82 return (
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83 <></>
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84 )
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85 case CellValue.PLAYER:
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86 return (
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87 <>🤖</>
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88 )
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89 case CellValue.OBSTICAL:
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90 return (
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91 <>🧱</>
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92 )
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93 case CellValue.GOAL:
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94 return (
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95 <>🪙</>
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96 )
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97 }
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98 }
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99
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100 const CellComponent = memo(({cell}: CellComponentProp) => {
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101 const cellStyle: CSSProperties = {
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102 padding: "10px",
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103 width: "50px",
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104 height: "50px",
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105 border: "1px solid #ccc",
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106 }
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107 return (
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108 <div style={cellStyle}>
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109 {getCellValue(cell)}
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110 </div>
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111 )
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112 })
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113
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114 const Row = memo(({rowValue}: RowProp) => {
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115 const rowStyle: CSSProperties = {
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116 display: "flex",
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117 }
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118 return (
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119 <div style={rowStyle}>
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120 {rowValue.map((cell, idx) => {return <CellComponent key={idx} cell={cell} />})}
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121 </div>
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122 )
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123 })
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124
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125 function boardReducer(state: GameState, action: GameAction): GameState {
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126 if (action.type === GameActionType.RESET) return INITIAL_GAME_STATE;
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127
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128 const { x, y } = state.robotState;
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129 let newX = x;
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130 let newY = y;
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131
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132 switch (action.command) {
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133 case "W": newX = Math.max(0, x - 1); break;
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134 case "A": newY = Math.max(0, y - 1); break;
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135 case "S": newX = Math.min(MAX_WIDTH - 1, x + 1); break;
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136 case "D": newY = Math.min(MAX_COLUMN - 1, y + 1); break;
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137 default: return state;
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138 }
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139
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140 const newBoard = state.board.map(row => row.slice());
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141
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142 newBoard[x][y] = { value: CellValue.EMPTY }; // old spot
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143 newBoard[newX][newY] = { value: CellValue.PLAYER }; // new spot
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144
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145 return {
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146 board: newBoard,
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147 status: GameStatus.PLAYABLE,
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148 robotState: { x: newX, y: newY },
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149 };
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150 }
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151
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152 const INITIAL_GAME_STATE: GameState = {
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153 board: BOARD,
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154 status: GameStatus.PLAYABLE,
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155 robotState: { x: 0, y: 0 },
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156 }
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157
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158 const Current = () => {
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159 const [state, dispatch] = useReducer(boardReducer, INITIAL_GAME_STATE);
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160
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161 useEffect(() => {
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162 const handleKeyDown = (event: KeyboardEvent) => {
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163 dispatch({type: GameActionType.MOVE, command: event.key.toUpperCase()})
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164 };
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165
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166 document.addEventListener("keydown", handleKeyDown);
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167 }, [])
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168
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169
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170
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171 return (
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172 <>
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173 {state.board.map((row, idx) => { return <Row key={idx} rowValue={row} />})}
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174 </>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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175 );
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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176 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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177
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178 export {
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MrJuneJune <me@mrjunejune.com>
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179 Current
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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180 }