git.cworth.org Git - lmno.games/blob - empires/empires-client.js

   1 const API = "https://families.cworth.org/api/";
   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 ${message}
  10 <span class="hide-button" onclick="undisplay(this.parentElement)">&times</span>
  11 </div>`;
  12   const message_area = document.getElementById('message-area');
  13   message_area.insertAdjacentHTML('beforeend', message);
  14 }
  15
  16 function register(form) {
  17   var request = new XMLHttpRequest();
  18
  19   request.open("POST", API + "register");
  20   request.setRequestHeader("Content-Type", "application/json; charset=UTF-8");
  21   var data = {
  22     "name": form.name.value,
  23     "character": form.character.value
  24   };
  25   request.send(JSON.stringify(data));
  26
  27   form.reset();
  28 }
  29
  30 const events = new EventSource(API + "events");
  31
  32 events.onerror = function(event) {
  33   if (event.target.readyState === EventSource.CLOSED) {
  34       add_message("danger", "Connection to server lost.");
  35   }
  36 };
  37
  38 events.addEventListener("players", function(event) {
  39   const players_element = document.getElementById("players");
  40   const players = JSON.parse(event.data);
  41
  42   players_element.innerHTML = '';
  43   for (const player of players) {
  44     var li = document.createElement('li');
  45     li.id = "player-" + player.id;
  46     li.innerText = player.name;
  47     players_element.appendChild(li);
  48   }
  49 });
  50
  51 events.addEventListener("player-join", function(event) {
  52   const players = document.getElementById("players");
  53   const player = JSON.parse(event.data);
  54
  55   const li = document.createElement('li');
  56   li.id = "player-" + player.id;
  57   li.innerText = player.name;
  58   players.appendChild(li);
  59
  60   add_message("success", player.name + " is now in the game!");
  61 });
  62
  63 events.addEventListener("player-leave", function(event) {
  64   const players = document.getElementById("players");
  65   const id = JSON.parse(event.data);
  66   const player = document.getElementById("player-" + id.id);
  67
  68   add_message("info", player.innerText + " has left the game.");
  69   players.removeChild(player);
  70 });
  71
  72 events.addEventListener("game-state", function(event) {
  73   const data = JSON.parse(event.data);
  74   const old_state = data.old_state;
  75   const new_state = data.new_state;
  76
  77   const hide_selector = ".show-state-" +old_state+ ",.hide-state-" +new_state;
  78   const show_selector = ".hide-state-" +old_state+ ",.show-state-" +new_state;
  79
  80   /* Hide all elements based on the state transition. */
  81   var elts = document.querySelectorAll(hide_selector);
  82   for (const elt of elts) {
  83     elt.style.display = "none";
  84   }
  85
  86   /* And show all elements based on the same state transition. */
  87   elts = document.querySelectorAll(show_selector);
  88   for (const elt of elts) {
  89     elt.style.display = "block";
  90   }
  91 });
  92
  93 events.addEventListener("character-reveal", function(event) {
  94   const data = JSON.parse(event.data);
  95   const character_name = data.character;
  96
  97   const character = document.getElementById("character-reveal");
  98
  99   character.innerText = character_name;
 100 });
 101
 102 events.addEventListener("capture", function(event_string) {
 103   const players = document.getElementById("players");
 104   const event = JSON.parse(event_string.data);
 105   const player = document.getElementById("player-" + event.captee);
 106
 107   players.removeChild(player);
 108 });