git.cworth.org Git - lmno.games/blob - scribe/scribe.jsx

   1 function team_symbol(team) {
   2   if (team === "+")
   3     return "+";
   4   else
   5     return "o";
   6 }
   7
   8 function undisplay(element) {
   9   element.style.display="none";
  10 }
  11
  12 function add_message(severity, message) {
  13   message = `<div class="message ${severity}" onclick="undisplay(this)">
  14 <span class="hide-button" onclick="undisplay(this.parentElement)">&times;</span>
  15 ${message}
  16 </div>`;
  17   const message_area = document.getElementById('message-area');
  18   message_area.insertAdjacentHTML('beforeend', message);
  19 }
  20
  21 /*********************************************************
  22  * Handling server-sent event stream                     *
  23  *********************************************************/
  24
  25 const events = new EventSource("events");
  26
  27 events.onerror = function(event) {
  28   if (event.target.readyState === EventSource.CLOSED) {
  29     setTimeout(() => {
  30       add_message("danger", "Connection to server lost.");
  31     }, 1000);
  32   }
  33 };
  34
  35 events.addEventListener("game-info", event => {
  36   const info = JSON.parse(event.data);
  37
  38   window.game.set_game_info(info);
  39 });
  40
  41 events.addEventListener("player-info", event => {
  42   const info = JSON.parse(event.data);
  43
  44   window.game.set_player_info(info);
  45 });
  46
  47 events.addEventListener("player-enter", event => {
  48   const info = JSON.parse(event.data);
  49
  50   window.game.set_other_player_info(info);
  51 });
  52
  53 events.addEventListener("player-update", event => {
  54   const info = JSON.parse(event.data);
  55
  56   if (info.id === window.game.state.player_info.id)
  57     window.game.set_player_info(info);
  58   else
  59     window.game.set_other_player_info(info);
  60 });
  61
  62 events.addEventListener("move", event => {
  63   const move = JSON.parse(event.data);
  64
  65   window.game.receive_move(move);
  66 });
  67
  68 events.addEventListener("game-state", event => {
  69   const state = JSON.parse(event.data);
  70
  71   window.game.reset_board();
  72
  73   for (let square of state.moves) {
  74     window.game.receive_move(square);
  75   }
  76 });
  77
  78 /*********************************************************
  79  * Game and supporting classes                           *
  80  *********************************************************/
  81
  82 function copy_to_clipboard(id)
  83 {
  84   const tmp = document.createElement("input");
  85   tmp.setAttribute("value", document.getElementById(id).innerHTML);
  86   document.body.appendChild(tmp);
  87   tmp.select();
  88   document.execCommand("copy");
  89   document.body.removeChild(tmp);
  90 }
  91
  92 function GameInfo(props) {
  93   if (! props.id)
  94     return null;
  95
  96   return (
  97     <div className="game-info">
  98       <span className="game-id">{props.id}</span>
  99       {" "}
 100       Share this link to invite a friend:{" "}
 101       <span id="game-share-url">{props.url}</span>
 102       {" "}
 103       <button
 104         className="inline"
 105         onClick={() => copy_to_clipboard('game-share-url')}
 106       >Copy Link</button>
 107     </div>
 108   );
 109 }
 110
 111 function TeamButton(props) {
 112   return <button className="inline"
 113                  onClick={() => props.game.join_team(props.team)}>
 114            {props.label}
 115          </button>;
 116 }
 117
 118 function TeamChoices(props) {
 119   let other_team;
 120   if (props.player.team === "+")
 121     other_team = "o";
 122   else
 123     other_team = "+";
 124
 125   if (props.player.team === "") {
 126     if (props.first_move) {
 127       return null;
 128     } else {
 129       return [
 130         <TeamButton key="+" game={props.game} team="+" label="Join 🞥" />,
 131         " ",
 132         <TeamButton key="o" game={props.game} team="o" label="Join 🞇" />
 133       ];
 134     }
 135   } else {
 136     return <TeamButton game={props.game} team={other_team} label="Switch" />;
 137   }
 138 }
 139
 140 function PlayerInfo(props) {
 141   if (! props.player.id)
 142     return null;
 143
 144   const choices = <TeamChoices
 145                     game={props.game}
 146                     first_move={props.first_move}
 147                     player={props.player}
 148                   />;
 149
 150   return (
 151     <div className="player-info">
 152       <span className="players-header">Players: </span>
 153       {props.player.name}
 154       {props.player.team ? ` (${props.player.team})` : ""}
 155       {props.first_move ? "" : " "}
 156       {choices}
 157       {props.other_players.map(other => (
 158         <span key={other.id}>
 159           {", "}
 160           {other.name}
 161           {other.team ? ` (${other.team})` : ""}
 162         </span>
 163       ))}
 164     </div>
 165   );
 166 }
 167
 168 function Square(props) {
 169   let className = "square";
 170
 171   if (props.value) {
 172     className += " occupied";
 173   } else if (props.active) {
 174     className += " open";
 175   }
 176
 177   const onClick = props.active ? props.onClick : null;
 178
 179   return (
 180     <div className={className}
 181          onClick={onClick}>
 182       {props.value}
 183     </div>
 184   );
 185 }
 186
 187 function MiniGrid(props) {
 188   function grid_square(j) {
 189     const value = props.squares[j];
 190     return (
 191       <Square
 192         value={value}
 193         active={props.active}
 194         onClick={() => props.onClick(j)}
 195       />
 196     );
 197   }
 198
 199   return (
 200     <div className="mini-grid">
 201       {grid_square(0)}
 202       {grid_square(1)}
 203       {grid_square(2)}
 204       {grid_square(3)}
 205       {grid_square(4)}
 206       {grid_square(5)}
 207       {grid_square(6)}
 208       {grid_square(7)}
 209       {grid_square(8)}
 210     </div>
 211   );
 212 }
 213
 214 class Board extends React.Component {
 215   mini_grid(i) {
 216     const squares = this.props.squares[i];
 217     return (
 218       <MiniGrid
 219         squares={squares}
 220         active={this.props.active}
 221         onClick={(j) => this.props.onClick(i,j)}
 222       />
 223     );
 224   }
 225
 226   render() {
 227     return (
 228       <div className="board-container">
 229         <div className="board">
 230           {this.mini_grid(0)}
 231           {this.mini_grid(1)}
 232           {this.mini_grid(2)}
 233           {this.mini_grid(3)}
 234           {this.mini_grid(4)}
 235           {this.mini_grid(5)}
 236           {this.mini_grid(6)}
 237           {this.mini_grid(7)}
 238           {this.mini_grid(8)}
 239         </div>
 240       </div>
 241     );
 242   }
 243 }
 244
 245 function fetch_method_json(method, api = '', data = {}) {
 246   const response = fetch(api, {
 247     method: method,
 248     headers: {
 249       'Content-Type': 'application/json'
 250     },
 251     body: JSON.stringify(data)
 252   });
 253   return response;
 254 }
 255
 256 function fetch_post_json(api = '', data = {}) {
 257   return fetch_method_json('POST', api, data);
 258 }
 259
 260 async function fetch_put_json(api = '', data = {}) {
 261   return fetch_method_json('PUT', api, data);
 262 }
 263
 264 class Game extends React.Component {
 265   constructor(props) {
 266     super(props);
 267     this.state = {
 268       game_info: {},
 269       player_info: {},
 270       other_players: [],
 271       squares: Array(9).fill(null).map(() => Array(9).fill(null)),
 272       moves: 0,
 273       next_to_play: "+"
 274     };
 275   }
 276
 277   set_game_info(info) {
 278     this.setState({
 279       game_info: info
 280     });
 281   }
 282
 283   set_player_info(info) {
 284     this.setState({
 285       player_info: info
 286     });
 287   }
 288
 289   set_other_player_info(info) {
 290     const other_players_copy = [...this.state.other_players];
 291     const idx = other_players_copy.findIndex(o => o.id === info.id);
 292     if (idx >= 0) {
 293       other_players_copy[idx] = info;
 294     } else {
 295       other_players_copy.push(info);
 296     }
 297     this.setState({
 298       other_players: other_players_copy
 299     });
 300   }
 301
 302   reset_board() {
 303     this.setState({
 304       next_to_play: "+"
 305     });
 306   }
 307
 308   receive_move(move) {
 309     if (this.state.moves === 81) {
 310       return;
 311     }
 312     const symbol = team_symbol(this.state.next_to_play);
 313     const new_squares = this.state.squares.map(arr => arr.slice());
 314     new_squares[move[0]][move[1]] = symbol;
 315     let next_to_play;
 316     if (this.state.next_to_play === "+")
 317       next_to_play = "o";
 318     else
 319       next_to_play = "+";
 320     this.setState({
 321       squares: new_squares,
 322       moves: this.state.moves + 1,
 323       next_to_play: next_to_play
 324     });
 325   }
 326
 327   async handle_click(i, j, first_move) {
 328     let move = {
 329       move: [i, j]
 330     };
 331     if (first_move) {
 332       move.assert_first_move = true;
 333     }
 334     const response = await fetch_post_json("move", move);
 335     if (response.status == 200) {
 336       const result = await response.json();
 337       if (! result.legal)
 338         add_message("danger", result.message);
 339     } else {
 340       add_message("danger", `Error occurred sending move`);
 341     }
 342   }
 343
 344   join_team(team) {
 345     fetch_put_json("player", {team: team});
 346   }
 347
 348   render() {
 349     const state = this.state;
 350     const first_move = state.moves === 0;
 351     const my_team = state.player_info.team;
 352     var board_active;
 353
 354     let status;
 355     if (this.state.moves.length === 81)
 356     {
 357       status = "Game over";
 358       board_active = false;
 359     }
 360     else if (first_move)
 361     {
 362       if (state.other_players.length == 0) {
 363         status = "You can move or wait for another player to join.";
 364       } else {
 365         let qualifier;
 366         if (state.other_players.length == 1) {
 367           qualifier = "Either";
 368         } else {
 369           qualifier = "Any";
 370         }
 371         status = `${qualifier} player can make the first move.`;
 372       }
 373       board_active = true;
 374     }
 375     else if (my_team === "")
 376     {
 377       status = "You're just watching the game.";
 378       board_active = false;
 379     }
 380     else if (my_team === state.next_to_play)
 381     {
 382       status = "Your turn. Make a move.";
 383       board_active = true;
 384     }
 385     else
 386     {
 387       status = "Waiting for another player to ";
 388       if (state.other_players.length == 0) {
 389         status += "join.";
 390       } else {
 391         status += "move.";
 392       }
 393       board_active = false;
 394     }
 395
 396     return [
 397       <GameInfo
 398         key="game-info"
 399         id={state.game_info.id}
 400         url={state.game_info.url}
 401       />,
 402       <PlayerInfo
 403         key="player-info"
 404         game={this}
 405         first_move={first_move}
 406         player={state.player_info}
 407         other_players={state.other_players}
 408       />,
 409       <div key="game" className="game">
 410         <div>{status}</div>
 411         <div className="game-board">
 412           <Board
 413             active={board_active}
 414             squares={state.squares}
 415             onClick={(i,j) => this.handle_click(i, j, first_move)}
 416           />
 417         </div>
 418       </div>
 419     ];
 420   }
 421 }
 422
 423 ReactDOM.render(<Game
 424                   ref={(me) => window.game = me}
 425                 />, document.getElementById("scribe"));