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

   1 function undisplay(element) {
   2   element.style.display="none";
   3 }
   4
   5 function add_message(severity, message) {
   6   message = `<div class="message ${severity}" onclick="undisplay(this)">
   7 <span class="hide-button" onclick="undisplay(this.parentElement)">&times;</span>
   8 ${message}
   9 </div>`;
  10   const message_area = document.getElementById('message-area');
  11   message_area.insertAdjacentHTML('beforeend', message);
  12 }
  13
  14 /*********************************************************
  15  * Handling server-sent event stream                     *
  16  *********************************************************/
  17
  18 const events = new EventSource("events");
  19
  20 events.onerror = function(event) {
  21   if (event.target.readyState === EventSource.CLOSED) {
  22     setTimeout(() => {
  23       add_message("danger", "Connection to server lost.");
  24     }, 1000);
  25   }
  26 };
  27
  28 events.addEventListener("game-info", event => {
  29   const info = JSON.parse(event.data);
  30
  31   window.game.set_game_info(info);
  32 });
  33
  34 events.addEventListener("player-info", event => {
  35   const info = JSON.parse(event.data);
  36
  37   window.game.set_player_info(info);
  38 });
  39
  40 events.addEventListener("player-enter", event => {
  41   const info = JSON.parse(event.data);
  42
  43   window.game.set_other_player_info(info);
  44 });
  45
  46 events.addEventListener("player-update", event => {
  47   const info = JSON.parse(event.data);
  48
  49   if (info.id === window.game.state.player_info.id)
  50     window.game.set_player_info(info);
  51   else
  52     window.game.set_other_player_info(info);
  53 });
  54
  55 events.addEventListener("game-state", event => {
  56   const state = JSON.parse(event.data);
  57
  58   for (let prompt of state.prompts) {
  59     window.game.add_or_update_prompt(prompt);
  60   }
  61
  62   window.game.set_active_prompt(state.active_prompt);
  63 });
  64
  65 events.addEventListener("prompt", event => {
  66   const prompt = JSON.parse(event.data);
  67
  68   window.game.add_or_update_prompt(prompt);
  69 });
  70
  71 events.addEventListener("start", event => {
  72   const prompt = JSON.parse(event.data);
  73
  74   window.game.set_active_prompt(prompt);
  75 });
  76
  77 events.addEventListener("answered", event => {
  78   const players_answered = JSON.parse(event.data);
  79
  80   window.game.set_players_answered(players_answered);
  81 });
  82
  83 /*********************************************************
  84  * Game and supporting classes                           *
  85  *********************************************************/
  86
  87 function copy_to_clipboard(id)
  88 {
  89   const tmp = document.createElement("input");
  90   tmp.setAttribute("value", document.getElementById(id).innerHTML);
  91   document.body.appendChild(tmp);
  92   tmp.select();
  93   document.execCommand("copy");
  94   document.body.removeChild(tmp);
  95 }
  96
  97 const GameInfo = React.memo(props => {
  98   if (! props.id)
  99     return null;
 100
 101   return (
 102     <div className="game-info">
 103       <span className="game-id">{props.id}</span>
 104       {" "}
 105       Share this link to invite friends:{" "}
 106       <span id="game-share-url">{props.url}</span>
 107       {" "}
 108       <button
 109         className="inline"
 110         onClick={() => copy_to_clipboard('game-share-url')}
 111       >Copy Link</button>
 112     </div>
 113   );
 114 });
 115
 116 const PlayerInfo = React.memo(props => {
 117   if (! props.player.id)
 118     return null;
 119
 120   return (
 121     <div className="player-info">
 122       <span className="players-header">Players: </span>
 123       {props.player.name}
 124       {props.other_players.map(other => (
 125         <span key={other.id}>
 126           {", "}
 127           {other.name}
 128         </span>
 129       ))}
 130     </div>
 131   );
 132 });
 133
 134 function fetch_method_json(method, api = '', data = {}) {
 135   const response = fetch(api, {
 136     method: method,
 137     headers: {
 138       'Content-Type': 'application/json'
 139     },
 140     body: JSON.stringify(data)
 141   });
 142   return response;
 143 }
 144
 145 function fetch_post_json(api = '', data = {}) {
 146   return fetch_method_json('POST', api, data);
 147 }
 148
 149 async function fetch_put_json(api = '', data = {}) {
 150   return fetch_method_json('PUT', api, data);
 151 }
 152
 153 class CategoryRequest extends React.PureComponent {
 154   constructor(props) {
 155     super(props);
 156     this.category = React.createRef();
 157
 158     this.handle_change = this.handle_change.bind(this);
 159     this.handle_submit = this.handle_submit.bind(this);
 160   }
 161
 162   handle_change(event) {
 163     const category_input = this.category.current;
 164     const category = category_input.value;
 165
 166     if (/[0-9]/.test(category))
 167       category_input.setCustomValidity("");
 168   }
 169
 170   handle_submit(event) {
 171     const form = event.currentTarget;
 172     const category_input = this.category.current;
 173     const category = category_input.value;
 174
 175     /* Prevent the default page-changing form-submission behavior. */
 176     event.preventDefault();
 177
 178     const match = category.match(/[0-9]+/);
 179     if (match === null) {
 180       category_input.setCustomValidity("Category must include a number");
 181       form.reportValidity();
 182       return;
 183     }
 184
 185     fetch_post_json("prompts", {
 186       items: parseInt(match[0], 10),
 187       prompt: category
 188     });
 189
 190     form.reset();
 191   }
 192
 193   render() {
 194     return (
 195       <div className="category-request">
 196         <h2>Submit a Category</h2>
 197         <p>
 198           Suggest a category to play. Don't forget to include the
 199           number of items for each person to submit.
 200         </p>
 201
 202         <form onSubmit={this.handle_submit} >
 203           <div className="form-field large">
 204             <input
 205               type="text"
 206               id="category"
 207               placeholder="6 things at the beach"
 208               required
 209               autoComplete="off"
 210               onChange={this.handle_change}
 211               ref={this.category}
 212             />
 213           </div>
 214
 215           <div className="form-field large">
 216             <button type="submit">
 217               Send
 218             </button>
 219           </div>
 220
 221         </form>
 222       </div>
 223     );
 224   }
 225 }
 226
 227 const PromptOptions = React.memo(props => {
 228
 229   if (props.prompts.length === 0)
 230     return null;
 231
 232   return (
 233     <div className="prompt-options">
 234       <h2>Vote on Categories</h2>
 235       <p>
 236         Select any categories below that you'd like to play.
 237         You can choose as many as you'd like.
 238       </p>
 239       {props.prompts.map(p => {
 240         return (
 241           <button
 242             className="vote-button"
 243             key={p.id}
 244             onClick={() => fetch_post_json(`vote/${p.id}`) }
 245           >
 246             {p.prompt}
 247             <div className="vote-choices">
 248               {p.votes.map(v => {
 249                 return (
 250                   <div
 251                     key={v}
 252                     className="vote-choice"
 253                   >
 254                     {v}
 255                   </div>
 256                 );
 257               })}
 258             </div>
 259           </button>
 260         );
 261       })}
 262     </div>
 263   );
 264 });
 265
 266 const LetsPlay = React.memo(props => {
 267
 268   function handle_click(prompt_id) {
 269     fetch_post_json
 270   }
 271
 272   const quorum = Math.round((props.num_players + 1) / 2);
 273   const max_votes = props.prompts.reduce(
 274     (max_so_far, v) => Math.max(max_so_far, v.votes.length), 0);
 275
 276   if (max_votes < quorum)
 277     return null;
 278
 279   const candidates = props.prompts.filter(p => p.votes.length >= quorum);
 280   const index = Math.floor(Math.random() * candidates.length);
 281   const winner = candidates[index];
 282
 283   return (
 284     <div className="lets-play">
 285       <h2>Let's Play</h2>
 286       <p>
 287         That should be enough voting. If you're not waiting for any
 288         other players to join, then let's start.
 289       </p>
 290       <button
 291         className="lets-play"
 292         onClick={() => fetch_post_json(`start/${winner.id}`) }
 293       >
 294         Start Game
 295       </button>
 296     </div>
 297   );
 298 });
 299
 300 class ActivePrompt extends React.PureComponent {
 301
 302   constructor(props) {
 303     super(props);
 304     const items = props.prompt.items;
 305
 306     this.state = {
 307       submitted: false
 308     };
 309
 310     this.answers = [...Array(items)].map(() => React.createRef());
 311     this.handle_submit = this.handle_submit.bind(this);
 312   }
 313
 314   async handle_submit(event) {
 315     const form = event.currentTarget;
 316
 317     /* Prevent the default page-changing form-submission behavior. */
 318     event.preventDefault();
 319
 320     const response = await fetch_post_json(`answer/${this.props.prompt.id}`, {
 321       answers: this.answers.map(r => r.current.value)
 322     });
 323     if (response.status == 200) {
 324       const result = await response.json();
 325       if (! result.valid) {
 326         add_message("danger", result.message);
 327         return;
 328       }
 329     } else {
 330       add_message("danger", "An error occurred submitting your answers");
 331       return;
 332     }
 333
 334     /* Everything worked. Server is happy with our answers. */
 335     form.reset();
 336     this.setState({
 337         submitted: true
 338     });
 339   }
 340
 341   render() {
 342     if (this.state.submitted)
 343       return (
 344         <div className="please-wait">
 345           <h2>{this.props.players_answered}/
 346             {this.props.players_total} players have responded</h2>
 347           <p>
 348             Please wait for the rest of the players to submit their answers.
 349           </p>
 350         </div>
 351       );
 352
 353     return (
 354       <div className="active-prompt">
 355         <h2>The Game of Empathy</h2>
 356         <p>
 357           Remember, you're trying to match your answers with
 358           what the other players submit.
 359           Give {this.props.prompt.items} answers for the following prompt:
 360         </p>
 361         <h2>{this.props.prompt.prompt}</h2>
 362         <form onSubmit={this.handle_submit}>
 363           {Array(this.props.prompt.items).fill(null).map((whocares,i) => {
 364             return (
 365               <div
 366                 key={i}
 367                 className="form-field large">
 368                 <input
 369                   type="text"
 370                   name={`answer_${i}`}
 371                   required
 372                   autoComplete="off"
 373                   ref={this.answers[i]}
 374                 />
 375               </div>
 376             );
 377           })}
 378
 379           <div
 380             key="submit-button"
 381             className="form-field large">
 382             <button type="submit">
 383               Send
 384             </button>
 385           </div>
 386
 387         </form>
 388       </div>
 389     );
 390   }
 391 }
 392
 393 class Game extends React.PureComponent {
 394   constructor(props) {
 395     super(props);
 396     this.state = {
 397       game_info: {},
 398       player_info: {},
 399       other_players: [],
 400       prompts: [],
 401       active_prompt: null,
 402       players_answered: 0
 403     };
 404   }
 405
 406   set_game_info(info) {
 407     this.setState({
 408       game_info: info
 409     });
 410   }
 411
 412   set_player_info(info) {
 413     this.setState({
 414       player_info: info
 415     });
 416   }
 417
 418   set_other_player_info(info) {
 419     const other_players_copy = [...this.state.other_players];
 420     const idx = other_players_copy.findIndex(o => o.id === info.id);
 421     if (idx >= 0) {
 422       other_players_copy[idx] = info;
 423     } else {
 424       other_players_copy.push(info);
 425     }
 426     this.setState({
 427       other_players: other_players_copy
 428     });
 429   }
 430
 431   add_or_update_prompt(prompt) {
 432     const prompts_copy = [...this.state.prompts];
 433     const idx = prompts_copy.findIndex(p => p.id === prompt.id);
 434     if (idx >= 0) {
 435       prompts_copy[idx] = prompt;
 436     } else {
 437       prompts_copy.push(prompt);
 438     }
 439     this.setState({
 440       prompts: prompts_copy
 441     });
 442   }
 443
 444   set_active_prompt(prompt) {
 445     this.setState({
 446       active_prompt: prompt
 447     });
 448   }
 449
 450   set_players_answered(players_answered) {
 451     this.setState({
 452       players_answered: players_answered
 453     });
 454   }
 455
 456   render() {
 457     const state = this.state;
 458     const players_total = 1 + state.other_players.length;
 459
 460     if (state.active_prompt) {
 461       return <ActivePrompt
 462                prompt={state.active_prompt}
 463                players_answered={state.players_answered}
 464                players_total={players_total}
 465              />;
 466     }
 467
 468     return [
 469       <GameInfo
 470         key="game-info"
 471         id={state.game_info.id}
 472         url={state.game_info.url}
 473       />,
 474       <PlayerInfo
 475         key="player-info"
 476         game={this}
 477         player={state.player_info}
 478         other_players={state.other_players}
 479       />,
 480       <p key="spacer"></p>,
 481       <CategoryRequest
 482         key="category-request"
 483       />,
 484       <PromptOptions
 485         key="prompts"
 486         prompts={state.prompts}
 487       />,
 488       <LetsPlay
 489         key="lets-play"
 490         num_players={1+state.other_players.length}
 491         prompts={state.prompts}
 492       />
 493     ];
 494   }
 495 }
 496
 497 ReactDOM.render(<Game
 498                   ref={(me) => window.game = me}
 499                 />, document.getElementById("empathy"));