empires: Rename all files (html, js, and css) to game.*

[lmno.games] / empires / game.js

diff --git a/empires/game.js b/empires/game.js
new file mode 100644 (file)
index 0000000..a0df913
--- /dev/null
+++ b/empires/game.js
@@ -0,0 +1,146 @@
+const API = "https://families.cworth.org/api/";
+
+function undisplay(element) {
+  element.style.display="none";
+}
+
+function add_message(severity, message) {
+  message = `<div class="message ${severity}" onclick="undisplay(this)">
+${message}
+<span class="hide-button" onclick="undisplay(this.parentElement)">&times</span>
+</div>`;
+  const message_area = document.getElementById('message-area');
+  message_area.insertAdjacentHTML('beforeend', message);
+}
+
+function register(form) {
+  var request = new XMLHttpRequest();
+
+  request.open("POST", API + "register");
+  request.setRequestHeader("Content-Type", "application/json; charset=UTF-8");
+  var data = {
+    "name": form.name.value,
+    "character": form.character.value
+  };
+  request.send(JSON.stringify(data));
+
+  form.reset();
+}
+
+function toggle_host_tools() {
+  const host_tools = document.getElementById("host-tools");
+
+  console.log("Toggling, host_tools.style.display is '" + host_tools.style.display + "'");
+
+  if (host_tools.style.display === "block")
+    host_tools.style.display = "none";
+  else
+    host_tools.style.display = "block";
+}
+
+function post_reveal() {
+  const request = new XMLHttpRequest();
+
+  request.open("POST", API + "reveal");
+  request.send();
+}
+
+function post_start() {
+  const request = new XMLHttpRequest();
+
+  request.open("POST", API + "start");
+  request.send();
+}
+
+function post_reset() {
+  const request = new XMLHttpRequest();
+
+  request.open("POST", API + "reset");
+  request.send();
+}
+
+const events = new EventSource(API + "events");
+
+events.onerror = function(event) {
+  if (event.target.readyState === EventSource.CLOSED) {
+      add_message("danger", "Connection to server lost.");
+  }
+};
+
+events.addEventListener("players", function(event) {
+  const players_div = document.getElementById("players-div");
+  const players_element = document.getElementById("players");
+  const players = JSON.parse(event.data);
+
+  players_element.innerHTML = '';
+  for (const player of players) {
+    var li = document.createElement('li');
+    li.id = "player-" + player.id;
+    li.innerText = player.name;
+    players_element.appendChild(li);
+  }
+
+  /* Force players list to be visible. */
+  players_div.style.display = "block";
+});
+
+events.addEventListener("player-join", function(event) {
+  const players_div = document.getElementById("players-div");
+  const players = document.getElementById("players");
+  const player = JSON.parse(event.data);
+
+  const li = document.createElement('li');
+  li.id = "player-" + player.id;
+  li.innerText = player.name;
+  players.appendChild(li);
+
+  /* Force players list to be visible. */
+  players_div.style.display = "block";
+});
+
+events.addEventListener("player-leave", function(event) {
+  const players = document.getElementById("players");
+  const id = JSON.parse(event.data);
+  const player = document.getElementById("player-" + id.id);
+
+  add_message("info", player.innerText + " has left the game.");
+  players.removeChild(player);
+});
+
+events.addEventListener("game-state", function(event) {
+  const data = JSON.parse(event.data);
+  const old_state = data.old_state;
+  const new_state = data.new_state;
+
+  const hide_selector = ".show-state-" +old_state+ ",.hide-state-" +new_state;
+  const show_selector = ".hide-state-" +old_state+ ",.show-state-" +new_state;
+
+  /* Hide all elements based on the state transition. */
+  var elts = document.querySelectorAll(hide_selector);
+  for (const elt of elts) {
+    elt.style.display = "none";
+  }
+
+  /* And show all elements based on the same state transition. */
+  elts = document.querySelectorAll(show_selector);
+  for (const elt of elts) {
+    elt.style.display = "block";
+  }
+});
+
+events.addEventListener("character-reveal", function(event) {
+  const data = JSON.parse(event.data);
+  const character_name = data.character;
+
+  const character = document.getElementById("character-reveal");
+
+  character.innerText = character_name;
+});
+
+events.addEventListener("capture", function(event_string) {
+  const players = document.getElementById("players");
+  const event = JSON.parse(event_string.data);
+  const player = document.getElementById("player-" + event.captee);
+
+  players.removeChild(player);
+});