Add messages to message area when a player joins or leaves the game

[lmno.games] / empires / empires-client.js

diff --git a/empires/empires-client.js b/empires/empires-client.js
index 9ac3308feff2519c5bb31b03d0f2fec7c9e7f722..3d528e08ba1e4efbee827b04a3c166c2ec90cd25 100644 (file)
--- a/empires/empires-client.js
+++ b/empires/empires-client.js
@@ -13,13 +13,8 @@ ${message}
   message_area.insertAdjacentHTML('beforeend', message);
 }
 
-function register_loaded(name) {
-  add_message("success", name + " is now in the game!");
-}
-
 function register(form) {
   var request = new XMLHttpRequest();
-  request.addEventListener("load", register_loaded(form.name.value));
 
   request.open("POST", API + "register");
   request.setRequestHeader("Content-Type", "application/json; charset=UTF-8");
@@ -34,23 +29,50 @@ function register(form) {
 
 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_element = document.getElementById("players");
   const players = JSON.parse(event.data);
 
   players_element.innerHTML = '';
   for (const player of players) {
-    var li =document.createElement('li');
+    var li = document.createElement('li');
+    li.id = "player-" + player.id;
     li.innerText = player.name;
     players_element.appendChild(li);
   }
 });
 
-events.addEventListener("player-register", function(event) {
+events.addEventListener("player-join", function(event) {
   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);
+
+  add_message("success", player.name + " is now in the game!");
+});
+
+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("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);
 });