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

   1 const MAX_PROMPT_ITEMS = 20;
   2
   3 function undisplay(element) {
   4   element.style.display="none";
   5 }
   6
   7 function add_message(severity, message) {
   8   message = `<div class="message ${severity}" onclick="undisplay(this)">
   9 <span class="hide-button" onclick="undisplay(this.parentElement)">&times;</span>
  10 ${message}
  11 </div>`;
  12   const message_area = document.getElementById('message-area');
  13   message_area.insertAdjacentHTML('beforeend', message);
  14 }
  15
  16 /*********************************************************
  17  * Handling server-sent event stream                     *
  18  *********************************************************/
  19
  20 const events = new EventSource("events");
  21
  22 events.onerror = function(event) {
  23   if (event.target.readyState === EventSource.CLOSED) {
  24     setTimeout(() => {
  25       add_message("danger", "Connection to server lost.");
  26     }, 1000);
  27   }
  28 };
  29
  30 events.addEventListener("game-info", event => {
  31   const info = JSON.parse(event.data);
  32
  33   window.game.set_game_info(info);
  34 });
  35
  36 events.addEventListener("player-info", event => {
  37   const info = JSON.parse(event.data);
  38
  39   window.game.set_player_info(info);
  40 });
  41
  42 events.addEventListener("player-enter", event => {
  43   const info = JSON.parse(event.data);
  44
  45   window.game.set_other_player_info(info);
  46 });
  47
  48 events.addEventListener("player-exit", event => {
  49   const info = JSON.parse(event.data);
  50
  51   window.game.remove_player(info);
  52 });
  53
  54 events.addEventListener("player-update", event => {
  55   const info = JSON.parse(event.data);
  56
  57   if (info.id === window.game.state.player_info.id)
  58     window.game.set_player_info(info);
  59   else
  60     window.game.set_other_player_info(info);
  61 });
  62
  63 events.addEventListener("game-state", event => {
  64   const state = JSON.parse(event.data);
  65
  66   window.game.reset_game_state();
  67
  68   window.game.set_prompts(state.prompts);
  69
  70   window.game.set_active_prompt(state.active_prompt);
  71
  72   window.game.set_players_answered(state.players_answered);
  73
  74   window.game.set_players_answering(state.players_answering);
  75
  76   window.game.set_answering_idle(state.answering_idle);
  77
  78   window.game.set_end_answers(state.end_answers);
  79
  80   window.game.set_ambiguities(state.ambiguities);
  81
  82   window.game.set_players_judged(state.players_judged);
  83
  84   window.game.set_players_judging(state.players_judging);
  85
  86   window.game.set_judging_idle(state.judging_idle);
  87
  88   window.game.set_end_judging(state.end_judging);
  89
  90   window.game.set_scores(state.scores);
  91
  92   window.game.set_new_game_votes(state.new_game_votes);
  93
  94   window.game.state_ready();
  95 });
  96
  97 events.addEventListener("prompt", event => {
  98   const prompt = JSON.parse(event.data);
  99
 100   window.game.add_or_update_prompt(prompt);
 101 });
 102
 103 events.addEventListener("start", event => {
 104   const prompt = JSON.parse(event.data);
 105
 106   window.game.set_active_prompt(prompt);
 107 });
 108
 109 events.addEventListener("player-answered", event => {
 110   const player = JSON.parse(event.data);
 111
 112   window.game.set_player_answered(player);
 113 });
 114
 115 events.addEventListener("player-answering", event => {
 116   const player = JSON.parse(event.data);
 117
 118   window.game.set_player_answering(player);
 119 });
 120
 121 events.addEventListener("answering-idle", event => {
 122   const value = JSON.parse(event.data);
 123
 124   window.game.set_answering_idle(value);
 125 });
 126
 127 events.addEventListener("vote-end-answers", event => {
 128   const player = JSON.parse(event.data);
 129
 130   window.game.set_player_vote_end_answers(player);
 131 });
 132
 133 events.addEventListener("unvote-end-answers", event => {
 134   const player = JSON.parse(event.data);
 135
 136   window.game.set_player_unvote_end_answers(player);
 137 });
 138
 139 events.addEventListener("ambiguities", event => {
 140   const ambiguities = JSON.parse(event.data);
 141
 142   window.game.set_ambiguities(ambiguities);
 143 });
 144
 145 events.addEventListener("player-judged", event => {
 146   const player = JSON.parse(event.data);
 147
 148   window.game.set_player_judged(player);
 149 });
 150
 151 events.addEventListener("player-judging", event => {
 152   const player = JSON.parse(event.data);
 153
 154   window.game.set_player_judging(player);
 155 });
 156
 157 events.addEventListener("judging-idle", event => {
 158   const value = JSON.parse(event.data);
 159
 160   window.game.set_judging_idle(value);
 161 });
 162
 163 events.addEventListener("vote-end-judging", event => {
 164   const player = JSON.parse(event.data);
 165
 166   window.game.set_player_vote_end_judging(player);
 167 });
 168
 169 events.addEventListener("unvote-end-judging", event => {
 170   const player = JSON.parse(event.data);
 171
 172   window.game.set_player_unvote_end_judging(player);
 173 });
 174
 175 events.addEventListener("scores", event => {
 176   const scores = JSON.parse(event.data);
 177
 178   window.game.set_scores(scores);
 179 });
 180
 181 events.addEventListener("vote-new-game", event => {
 182   const player = JSON.parse(event.data);
 183
 184   window.game.set_player_vote_new_game(player);
 185 });
 186
 187 events.addEventListener("unvote-new-game", event => {
 188   const player = JSON.parse(event.data);
 189
 190   window.game.set_player_unvote_new_game(player);
 191 });
 192
 193 /*********************************************************
 194  * Game and supporting classes                           *
 195  *********************************************************/
 196
 197 function copy_to_clipboard(id)
 198 {
 199   const tmp = document.createElement("input");
 200   tmp.setAttribute("value", document.getElementById(id).innerHTML);
 201   document.body.appendChild(tmp);
 202   tmp.select();
 203   document.execCommand("copy");
 204   document.body.removeChild(tmp);
 205 }
 206
 207 const GameInfo = React.memo(props => {
 208   if (! props.id)
 209     return null;
 210
 211   return (
 212     <div className="game-info">
 213       <span className="game-id">{props.id}</span>
 214       {" "}
 215       Share this link to invite friends:{" "}
 216       <span id="game-share-url">{props.url}</span>
 217       {" "}
 218       <button
 219         className="inline"
 220         onClick={() => copy_to_clipboard('game-share-url')}
 221       >Copy Link</button>
 222     </div>
 223   );
 224 });
 225
 226 const PlayerInfo = React.memo(props => {
 227   if (! props.player.id)
 228     return null;
 229
 230   const all_players = [props.player, ...props.other_players];
 231
 232   const sorted_players = all_players.sort((a,b) => {
 233     return b.score - a.score;
 234   });
 235
 236   const names_and_scores = sorted_players.map(player => {
 237     if (player.score)
 238       return `${player.name} (${player.score})`;
 239     else
 240       return player.name;
 241   }).join(', ');
 242
 243   return (
 244     <div className="player-info">
 245       <span className="players-header">Players: </span>
 246       <span>{names_and_scores}</span>
 247     </div>
 248   );
 249 });
 250
 251 function fetch_method_json(method, api = '', data = {}) {
 252   const response = fetch(api, {
 253     method: method,
 254     headers: {
 255       'Content-Type': 'application/json'
 256     },
 257     body: JSON.stringify(data)
 258   });
 259   return response;
 260 }
 261
 262 function fetch_post_json(api = '', data = {}) {
 263   return fetch_method_json('POST', api, data);
 264 }
 265
 266 async function fetch_put_json(api = '', data = {}) {
 267   return fetch_method_json('PUT', api, data);
 268 }
 269
 270 class CategoryRequest extends React.PureComponent {
 271   constructor(props) {
 272     super(props);
 273     this.category = React.createRef();
 274
 275     this.handle_change = this.handle_change.bind(this);
 276     this.handle_submit = this.handle_submit.bind(this);
 277   }
 278
 279   handle_change(event) {
 280     const category_input = this.category.current;
 281     const category = category_input.value;
 282
 283     const match = category.match(/[0-9]+/);
 284     if (match) {
 285       const num_items = parseInt(match[0], 10);
 286       if (num_items <= MAX_PROMPT_ITEMS)
 287         category_input.setCustomValidity("");
 288     }
 289   }
 290
 291   async handle_submit(event) {
 292     const form = event.currentTarget;
 293     const category_input = this.category.current;
 294     const category = category_input.value;
 295
 296     /* Prevent the default page-changing form-submission behavior. */
 297     event.preventDefault();
 298
 299     const match = category.match(/[0-9]+/);
 300     if (match === null) {
 301       category_input.setCustomValidity("Category must include a number");
 302       form.reportValidity();
 303       return;
 304     }
 305
 306     const num_items = parseInt(match[0], 10);
 307
 308     if (num_items > MAX_PROMPT_ITEMS) {
 309       category_input.setCustomValidity(`Maximum number of items is ${MAX_PROMPT_ITEMS}`);
 310       form.reportValidity();
 311       return;
 312     }
 313
 314     const response = await fetch_post_json("prompts", {
 315       items: num_items,
 316       prompt: category
 317     });
 318
 319     if (response.status === 200) {
 320       const result = await response.json();
 321       if (! result.valid) {
 322         add_message("danger", result.message);
 323         return;
 324       }
 325     } else {
 326       add_message("danger", "An error occurred submitting your category");
 327     }
 328
 329     form.reset();
 330   }
 331
 332   render() {
 333     return (
 334       <div className="category-request">
 335         <h2>Submit a Category</h2>
 336         <p>
 337           Suggest a category to play. Don't forget to include the
 338           number of items for each person to submit.
 339         </p>
 340
 341         <form onSubmit={this.handle_submit} >
 342           <div className="form-field large">
 343             <input
 344               type="text"
 345               id="category"
 346               placeholder="6 things at the beach"
 347               required
 348               autoComplete="off"
 349               onChange={this.handle_change}
 350               ref={this.category}
 351             />
 352           </div>
 353
 354           <div className="form-field large">
 355             <button type="submit">
 356               Send
 357             </button>
 358           </div>
 359
 360         </form>
 361       </div>
 362     );
 363   }
 364 }
 365
 366 const PromptOption = React.memo(props => {
 367
 368   const prompt = props.prompt;
 369   const [show_prompt, set_show_prompt] = React.useState(true);
 370
 371   if (! show_prompt)
 372     return false;
 373
 374   if (prompt.votes_against.find(v => v === props.player.name))
 375     return false;
 376
 377   return (
 378     <button
 379       className="vote-button"
 380       key={prompt.id}
 381       onClick={() => fetch_post_json(`vote/${prompt.id}`) }
 382     >
 383       <span
 384         className="hide-button"
 385         onClick={(event) => {
 386           event.stopPropagation();
 387           fetch_post_json(`vote_against/${prompt.id}`);
 388           set_show_prompt(false);
 389         }}
 390       >
 391         &times;
 392       </span>
 393       {prompt.prompt}
 394       <div className="vote-choices">
 395         {prompt.votes.map(v => {
 396           return (
 397             <div
 398               key={v}
 399               className="vote-choice"
 400             >
 401               {v}
 402             </div>
 403           );
 404         })}
 405       </div>
 406     </button>
 407   );
 408 });
 409
 410 const PromptOptions = React.memo(props => {
 411
 412   if (props.prompts.length === 0)
 413     return null;
 414
 415   return (
 416     <div className="prompt-options">
 417       <h2>Vote on Categories</h2>
 418       <p>
 419         Select any categories below that you'd like to play.
 420         You can choose as many as you'd like.
 421       </p>
 422     {props.prompts.map(p => <PromptOption prompt={p} player={props.player} />)}
 423     </div>
 424   );
 425 });
 426
 427 const LetsPlay = React.memo(props => {
 428
 429   const quorum = Math.round((props.num_players + 1) / 2);
 430   const max_votes = props.prompts.reduce(
 431     (max_so_far, v) => Math.max(max_so_far, v.votes.length), 0);
 432
 433   if (max_votes < quorum)
 434     return null;
 435
 436   const candidates = props.prompts.filter(p => p.votes.length >= quorum);
 437   const index = Math.floor(Math.random() * candidates.length);
 438   const winner = candidates[index];
 439
 440   return (
 441     <div className="lets-play">
 442       <h2>Let's Play</h2>
 443       <p>
 444         That should be enough voting. If you're not waiting for any
 445         other players to join, then let's start.
 446       </p>
 447       <button
 448         className="lets-play"
 449         onClick={() => fetch_post_json(`start/${winner.id}`) }
 450       >
 451         Start Game
 452       </button>
 453     </div>
 454   );
 455 });
 456
 457 class Ambiguities extends React.PureComponent {
 458
 459   constructor(props) {
 460     super(props);
 461
 462     const word_sets = props.words.map(word => {
 463       const set = new Set();
 464       set.add(word);
 465       return set;
 466     });
 467
 468     this.state = {
 469       word_sets: word_sets,
 470       selected: null
 471     };
 472
 473     this.submitted = false;
 474     this.judging_sent_recently = false;
 475   }
 476
 477   async handle_submit() {
 478
 479     /* Don't submit a second time. */
 480     if (this.submitted)
 481       return;
 482
 483     const response = await fetch_post_json(
 484       `judged/${this.props.prompt.id}`,{
 485         word_groups: this.state.word_sets.map(set => Array.from(set))
 486       }
 487     );
 488
 489     if (response.status === 200) {
 490       const result = await response.json();
 491       if (! result.valid) {
 492         add_message("danger", result.message);
 493         return;
 494       }
 495     } else {
 496       add_message("danger", "An error occurred submitting the results of your judging");
 497       return;
 498     }
 499
 500     this.submitted = true;
 501   }
 502
 503   handle_click(word) {
 504
 505     /* Let the server know we are doing some judging, (but rate limit
 506      * this so we don't send a "judging" notification more frquently
 507      * than necessary.
 508      */
 509     if (! this.judging_sent_recently) {
 510       fetch_post_json(`judging/${this.props.prompt.id}`);
 511       this.judging_sent_recently = true;
 512       setTimeout(() => { this.judging_sent_recently = false; }, 1000);
 513     }
 514
 515     if (this.state.selected == word) {
 516       /* Second click on same word removes the word from the group. */
 517       const idx = this.state.word_sets.findIndex(s => s.has(word));
 518       const set = this.state.word_sets[idx];
 519       if (set.size === 1) {
 520         /* When the word is already alone, there's nothing to do but
 521          * to un-select it. */
 522         this.setState({
 523           selected: null
 524         });
 525         return;
 526       }
 527
 528       const new_set = new Set([...set].filter(w => w !== word));
 529       this.setState({
 530         selected: null,
 531         word_sets: [...this.state.word_sets.slice(0, idx),
 532                     new_set,
 533                     new Set().add(word),
 534                     ...this.state.word_sets.slice(idx+1)]
 535       });
 536     } else if (this.state.selected) {
 537       /* Click of a second word groups the two together. */
 538       const idx1 = this.state.word_sets.findIndex(s => s.has(this.state.selected));
 539       const idx2 = this.state.word_sets.findIndex(s => s.has(word));
 540       const set1 = this.state.word_sets[idx1];
 541       const set2 = this.state.word_sets[idx2];
 542       const new_set = new Set([...set2, ...set1]);
 543       if (idx1 < idx2) {
 544         this.setState({
 545           selected: null,
 546           word_sets: [...this.state.word_sets.slice(0, idx1),
 547                       ...this.state.word_sets.slice(idx1 + 1, idx2),
 548                       new_set,
 549                       ...this.state.word_sets.slice(idx2 + 1)]
 550         });
 551       } else {
 552         this.setState({
 553           selected: null,
 554           word_sets: [...this.state.word_sets.slice(0, idx2),
 555                       new_set,
 556                       ...this.state.word_sets.slice(idx2 + 1, idx1),
 557                       ...this.state.word_sets.slice(idx1 + 1)]
 558         });
 559       }
 560     } else {
 561       /* First click of a word selects it. */
 562       this.setState({
 563         selected: word
 564       });
 565     }
 566   }
 567
 568   render() {
 569     let move_on_button = null;
 570
 571     if (this.props.idle) {
 572       move_on_button = (
 573         <button
 574           className="vote-button"
 575           onClick={() => fetch_post_json(`end-judging/${this.props.prompt.id}`) }
 576         >
 577           Move On
 578           <div className="vote-choices">
 579             {[...this.props.votes].map(v => {
 580               return (
 581                 <div
 582                   key={v}
 583                   className="vote-choice"
 584                 >
 585                   {v}
 586                   </div>
 587               );
 588             })}
 589           </div>
 590         </button>
 591       );
 592     }
 593
 594     let still_waiting = null;
 595     const judging_players = Object.keys(this.props.players_judging);
 596     if (judging_players.length) {
 597       still_waiting = (
 598         <div>
 599           <p>
 600             Still waiting for the following player
 601             {judging_players.length > 1 ? 's' : '' }
 602             :
 603           </p>
 604           <ul>
 605             {judging_players.map(player => {
 606               return (
 607                 <li
 608                   key={player}
 609                 >
 610                   {player}{' '}
 611                   <span className=
 612                   {this.props.players_judging[player].active ?
 613                    "typing active"
 614                    :
 615                    "typing idle"}>
 616                     <span>{'.'}</span><span>{'.'}</span><span>{'.'}</span>
 617                   </span>
 618                 </li>
 619               );
 620             })}
 621           </ul>
 622         </div>
 623       );
 624     }
 625
 626     if (this.props.players_judged.has(this.props.player.name)) {
 627       return (
 628         <div className="please-wait">
 629           <h2>Submission received</h2>
 630           <p>
 631             The following players have completed judging:{' '}
 632             {[...this.props.players_judged].join(', ')}
 633           </p>
 634           {still_waiting}
 635           {move_on_button}
 636
 637         </div>
 638       );
 639     }
 640
 641     const btn_class = "ambiguity-button";
 642     const btn_selected_class = btn_class + " selected";
 643
 644     return (
 645       <div className="ambiguities">
 646         <h2>Judging Answers</h2>
 647         <p>
 648           Click on each pair of answers that should be scored as equivalent,
 649           (and click any word twice to split it out from a group). Remember,
 650           what goes around comes around, so it's best to be generous when
 651           judging.
 652         </p>
 653         <h2>{this.props.prompt.prompt}</h2>
 654         {this.state.word_sets.map(set => {
 655           return (
 656             <div
 657               className="ambiguity-group"
 658               key={Array.from(set)[0]}
 659             >
 660               {Array.from(set).map(word => {
 661                 return (
 662                   <button
 663                     className={this.state.selected === word ?
 664                                btn_selected_class : btn_class }
 665                     key={word}
 666                     onClick={() => this.handle_click(word)}
 667                   >
 668                     {word}
 669                   </button>
 670                 );
 671               })}
 672             </div>
 673           );
 674         })}
 675         <p>
 676           Click here when done judging:<br/>
 677           <button
 678             onClick={() => this.handle_submit()}
 679           >
 680             Send
 681           </button>
 682         </p>
 683       </div>
 684     );
 685   }
 686 }
 687
 688 class ActivePrompt extends React.PureComponent {
 689
 690   constructor(props) {
 691     super(props);
 692     const items = props.prompt.items;
 693
 694     this.submitted = false;
 695
 696     this.answers = [...Array(items)].map(() => React.createRef());
 697     this.answering_sent_recently = false;
 698
 699     this.handle_submit = this.handle_submit.bind(this);
 700     this.handle_change = this.handle_change.bind(this);
 701   }
 702
 703   handle_change(event) {
 704     /* We don't care (or even look) at what the player is typing at
 705      * this point. We simply want to be informed that the player _is_
 706      * typing so that we can tell the server (which will tell other
 707      * players) that there is activity here.
 708      */
 709
 710     /* Rate limit so that we don't send an "answering" notification
 711      * more frequently than necessary.
 712      */
 713     if (! this.answering_sent_recently) {
 714       fetch_post_json(`answering/${this.props.prompt.id}`);
 715       this.answering_sent_recently = true;
 716       setTimeout(() => { this.answering_sent_recently = false; }, 1000);
 717     }
 718   }
 719
 720   async handle_submit(event) {
 721     const form = event.currentTarget;
 722
 723     /* Prevent the default page-changing form-submission behavior. */
 724     event.preventDefault();
 725
 726     /* And don't submit a second time. */
 727     if (this.submitted)
 728       return;
 729
 730     const response = await fetch_post_json(`answer/${this.props.prompt.id}`, {
 731       answers: this.answers.map(r => r.current.value)
 732     });
 733     if (response.status === 200) {
 734       const result = await response.json();
 735       if (! result.valid) {
 736         add_message("danger", result.message);
 737         return;
 738       }
 739     } else {
 740       add_message("danger", "An error occurred submitting your answers");
 741       return;
 742     }
 743
 744     /* Everything worked. Server is happy with our answers. */
 745     form.reset();
 746     this.submitted = true;
 747   }
 748
 749   render() {
 750     let move_on_button = null;
 751     if (this.props.idle) {
 752       move_on_button =(
 753         <button
 754           className="vote-button"
 755           onClick={() => fetch_post_json(`end-answers/${this.props.prompt.id}`) }
 756         >
 757           Move On
 758           <div className="vote-choices">
 759             {[...this.props.votes].map(v => {
 760               return (
 761                 <div
 762                   key={v}
 763                   className="vote-choice"
 764                 >
 765                   {v}
 766                 </div>
 767               );
 768             })}
 769           </div>
 770         </button>
 771       );
 772     }
 773
 774     let still_waiting = null;
 775     const answering_players = Object.keys(this.props.players_answering);;
 776     if (answering_players.length) {
 777       still_waiting = (
 778         <div>
 779           <p>
 780             Still waiting for the following player
 781             {answering_players.length > 1 ? 's' : ''}
 782             :
 783           </p>
 784           <ul>
 785             {answering_players.map(player => {
 786               return (
 787                 <li
 788                   key={player}
 789                 >
 790                   {player}{' '}
 791                   <span className=
 792                   {this.props.players_answering[player].active ?
 793                    "typing active"
 794                    :
 795                    "typing idle"}>
 796                     <span>{'.'}</span><span>{'.'}</span><span>{'.'}</span>
 797                   </span>
 798                 </li>
 799               );
 800             })}
 801           </ul>
 802         </div>
 803       );
 804     }
 805
 806     if (this.props.players_answered.has(this.props.player.name)) {
 807       return (
 808         <div className="please-wait">
 809           <h2>Submission received</h2>
 810           <p>
 811             The following players have submitted their answers:{' '}
 812             {[...this.props.players_answered].join(', ')}
 813           </p>
 814           {still_waiting}
 815           {move_on_button}
 816
 817         </div>
 818       );
 819     }
 820
 821     return (
 822       <div className="active-prompt">
 823         <h2>The Game of Empathy</h2>
 824         <p>
 825           Remember, you're trying to match your answers with
 826           what the other players submit.
 827           Give {this.props.prompt.items} answer
 828           {this.props.prompt.items > 1 ? 's' : ''} for the following prompt:
 829         </p>
 830         <h2>{this.props.prompt.prompt}</h2>
 831         <form onSubmit={this.handle_submit}>
 832           {[...Array(this.props.prompt.items)].map((whocares,i) => {
 833             return (
 834               <div
 835                 key={i}
 836                 className="form-field large">
 837                 <input
 838                   type="text"
 839                   name={`answer_${i}`}
 840                   required
 841                   autoComplete="off"
 842                   onChange={this.handle_change}
 843                   ref={this.answers[i]}
 844                 />
 845               </div>
 846             );
 847           })}
 848
 849           <div
 850             key="submit-button"
 851             className="form-field large">
 852             <button type="submit">
 853               Send
 854             </button>
 855           </div>
 856
 857         </form>
 858       </div>
 859     );
 860   }
 861 }
 862
 863 class Game extends React.PureComponent {
 864   constructor(props) {
 865     super(props);
 866     this.state = {
 867       game_info: {},
 868       player_info: {},
 869       other_players: [],
 870       prompts: [],
 871       active_prompt: null,
 872       players_answered: new Set(),
 873       players_answering: {},
 874       answering_idle: false,
 875       end_answers_votes: new Set(),
 876       ambiguities: null,
 877       players_judged: new Set(),
 878       players_judging: {},
 879       judging_idle: false,
 880       end_judging_votes: new Set(),
 881       scores: null,
 882       new_game_votes: new Set(),
 883       ready: false
 884     };
 885   }
 886
 887   set_game_info(info) {
 888     this.setState({
 889       game_info: info
 890     });
 891   }
 892
 893   set_player_info(info) {
 894     this.setState({
 895       player_info: info
 896     });
 897   }
 898
 899   set_other_player_info(info) {
 900     const other_players_copy = [...this.state.other_players];
 901     const idx = other_players_copy.findIndex(o => o.id === info.id);
 902     if (idx >= 0) {
 903       other_players_copy[idx] = info;
 904     } else {
 905       other_players_copy.push(info);
 906     }
 907     this.setState({
 908       other_players: other_players_copy
 909     });
 910   }
 911
 912   remove_player(info) {
 913     this.setState({
 914       other_players: this.state.other_players.filter(o => o.id !== info.id)
 915     });
 916   }
 917
 918   reset_game_state() {
 919     this.setState({
 920       prompts: [],
 921       active_prompt: null,
 922       players_answered: new Set(),
 923       players_answering: {},
 924       answering_idle: false,
 925       end_answers_votes: new Set(),
 926       ambiguities: null,
 927       players_judged: new Set(),
 928       players_judging: {},
 929       judging_idle: false,
 930       end_judging_votes: new Set(),
 931       scores: null,
 932       new_game_votes: new Set(),
 933       ready: false
 934     });
 935   }
 936
 937   set_prompts(prompts) {
 938     this.setState({
 939       prompts: prompts
 940     });
 941   }
 942
 943   add_or_update_prompt(prompt) {
 944     const prompts_copy = [...this.state.prompts];
 945     const idx = prompts_copy.findIndex(p => p.id === prompt.id);
 946     if (idx >= 0) {
 947       prompts_copy[idx] = prompt;
 948     } else {
 949       prompts_copy.push(prompt);
 950     }
 951     this.setState({
 952       prompts: prompts_copy
 953     });
 954   }
 955
 956   set_active_prompt(prompt) {
 957     this.setState({
 958       active_prompt: prompt
 959     });
 960   }
 961
 962   set_players_answered(players) {
 963     this.setState({
 964       players_answered: new Set(players)
 965     });
 966   }
 967
 968   set_player_answered(player) {
 969     const new_players_answering = {...this.state.players_answering};
 970     delete new_players_answering[player];
 971
 972     this.setState({
 973       players_answered: new Set([...this.state.players_answered, player]),
 974       players_answering: new_players_answering
 975     });
 976   }
 977
 978   set_players_answering(players) {
 979     const players_answering = {};
 980     for (let player of players) {
 981       players_answering[player] = {active: false};
 982     }
 983     this.setState({
 984       players_answering: players_answering
 985     });
 986   }
 987
 988   set_player_answering(player) {
 989     /* Set the player as actively answering now. */
 990     this.setState({
 991       players_answering: {
 992         ...this.state.players_answering,
 993         [player]: {active: true}
 994       }
 995     });
 996     /* And arrange to have them marked idle very shortly.
 997      *
 998      * Note: This timeout is intentionally very, very short. We only
 999      * need it long enough that the browser has latched onto the state
1000      * change to "active" above. We actually use a CSS transition
1001      * delay to control the user-perceptible length of time after
1002      * which an active player appears inactive.
1003      */
1004     setTimeout(() => {
1005       this.setState({
1006         players_answering: {
1007           ...this.state.players_answering,
1008           [player]: {active: false}
1009         }
1010       });
1011     }, 100);
1012   }
1013
1014   set_answering_idle(value) {
1015     this.setState({
1016       answering_idle: value
1017     });
1018   }
1019
1020   set_end_answers(players) {
1021     this.setState({
1022       end_answers_votes: new Set(players)
1023     });
1024   }
1025
1026   set_player_vote_end_answers(player) {
1027     this.setState({
1028       end_answers_votes: new Set([...this.state.end_answers_votes, player])
1029     });
1030   }
1031
1032   set_player_unvote_end_answers(player) {
1033     this.setState({
1034       end_answers_votes: new Set([...this.state.end_answers_votes].filter(p => p !== player))
1035     });
1036   }
1037
1038   set_ambiguities(ambiguities) {
1039     this.setState({
1040       ambiguities: ambiguities
1041     });
1042   }
1043
1044   set_players_judged(players) {
1045     this.setState({
1046       players_judged: new Set(players)
1047     });
1048   }
1049
1050   set_player_judged(player) {
1051     const new_players_judging = {...this.state.players_judging};
1052     delete new_players_judging[player];
1053
1054     this.setState({
1055       players_judged: new Set([...this.state.players_judged, player]),
1056       players_judging: new_players_judging
1057     });
1058   }
1059
1060   set_players_judging(players) {
1061     const players_judging = {};
1062     for (let player of players) {
1063       players_judging[player] = {active: false};
1064     }
1065     this.setState({
1066       players_judging: players_judging
1067     });
1068   }
1069
1070   set_player_judging(player) {
1071     /* Set the player as actively judging now. */
1072     this.setState({
1073       players_judging: {
1074         ...this.state.players_judging,
1075         [player]: {active: true}
1076       }
1077     });
1078     /* And arrange to have them marked idle very shortly.
1079      *
1080      * Note: This timeout is intentionally very, very short. We only
1081      * need it long enough that the browser has latched onto the state
1082      * change to "active" above. We actually use a CSS transition
1083      * delay to control the user-perceptible length of time after
1084      * which an active player appears inactive.
1085      */
1086     setTimeout(() => {
1087       this.setState({
1088         players_judging: {
1089           ...this.state.players_judging,
1090           [player]: {active: false}
1091         }
1092       });
1093     }, 100);
1094
1095   }
1096
1097   set_judging_idle(value) {
1098     this.setState({
1099       judging_idle: value
1100     });
1101   }
1102
1103   set_end_judging(players) {
1104     this.setState({
1105       end_judging_votes: new Set(players)
1106     });
1107   }
1108
1109   set_player_vote_end_judging(player) {
1110     this.setState({
1111       end_judging_votes: new Set([...this.state.end_judging_votes, player])
1112     });
1113   }
1114
1115   set_player_unvote_end_judging(player) {
1116     this.setState({
1117       end_judging_votes: new Set([...this.state.end_judging_votes].filter(p => p !== player))
1118     });
1119   }
1120
1121   set_scores(scores) {
1122     this.setState({
1123       scores: scores
1124     });
1125   }
1126
1127   set_new_game_votes(players) {
1128     this.setState({
1129       new_game_votes: new Set(players)
1130     });
1131   }
1132
1133   set_player_vote_new_game(player) {
1134     this.setState({
1135       new_game_votes: new Set([...this.state.new_game_votes, player])
1136     });
1137   }
1138
1139   set_player_unvote_new_game(player) {
1140     this.setState({
1141       new_game_votes: new Set([...this.state.new_game_votes].filter(p => p !== player))
1142     });
1143   }
1144
1145   state_ready() {
1146     this.setState({
1147       ready: true
1148     });
1149   }
1150
1151   render() {
1152     const state = this.state;
1153     const players_total = 1 + state.other_players.length;
1154
1155     if (state.scores) {
1156       return (
1157         <div className="scores">
1158           <h2>{state.active_prompt.prompt}</h2>
1159           <h2>Scores</h2>
1160           <ul>
1161             {state.scores.scores.map(score => {
1162               return (
1163                 <li key={score.player}>
1164                   {score.players.join("/")}: {score.score}
1165                 </li>
1166               );
1167             })}
1168           </ul>
1169           <h2>Words submitted</h2>
1170           <ul>
1171             {state.scores.words.map(word => {
1172               return (
1173                 <li key={word.word}>
1174                   {word.word} ({word.players.length}): {word.players.join(', ')}
1175                 </li>
1176               );
1177             })}
1178           </ul>
1179           <button
1180             className="vote-button"
1181             onClick={() => fetch_post_json(`new-game/${state.active_prompt.id}`) }
1182           >
1183             New Game
1184             <div className="vote-choices">
1185               {[...state.new_game_votes].map(v => {
1186                 return (
1187                   <div
1188                     key={v}
1189                     className="vote-choice"
1190                   >
1191                     {v}
1192                   </div>
1193                 );
1194               })}
1195             </div>
1196           </button>
1197         </div>
1198       );
1199     }
1200
1201     if (state.ambiguities){
1202       return <Ambiguities
1203                prompt={state.active_prompt}
1204                words={state.ambiguities}
1205                player={state.player_info}
1206                players_judged={state.players_judged}
1207                players_judging={state.players_judging}
1208                idle={state.judging_idle}
1209                votes={state.end_judging_votes}
1210              />;
1211     }
1212
1213     if (state.active_prompt) {
1214       return <ActivePrompt
1215                prompt={state.active_prompt}
1216                player={state.player_info}
1217                players_answered={state.players_answered}
1218                players_answering={state.players_answering}
1219                idle={state.answering_idle}
1220                votes={state.end_answers_votes}
1221              />;
1222     }
1223
1224     if (! state.ready)
1225       return null;
1226
1227     return [
1228       <GameInfo
1229         key="game-info"
1230         id={state.game_info.id}
1231         url={state.game_info.url}
1232       />,
1233       <PlayerInfo
1234         key="player-info"
1235         game={this}
1236         player={state.player_info}
1237         other_players={state.other_players}
1238       />,
1239       <p key="spacer"></p>,
1240       <CategoryRequest
1241         key="category-request"
1242       />,
1243       <PromptOptions
1244         key="prompts"
1245         prompts={state.prompts}
1246         player={state.player_info}
1247       />,
1248       <LetsPlay
1249         key="lets-play"
1250         num_players={1+state.other_players.length}
1251         prompts={state.prompts}
1252       />
1253     ];
1254   }
1255 }
1256
1257 ReactDOM.render(<Game
1258                   ref={(me) => window.game = me}
1259                 />, document.getElementById("empathy"));