Show a toast when clicking nick of a user who left

css/glowingbear.css

@@ -708,6 +708,31 @@ img.emojione {
     width: auto;
 }
 
+#toast {
+  position: fixed;
+  left: 50%;
+  bottom: 50px;
+  width: 250px;
+  margin-left: -125px;
+
+  background-color: #333;
+  text-align: center;
+  border-radius: 3px;
+  padding: 10px 15px;
+  z-index: 100;
+  animation: fadein 0.5s, fadeout 0.5s 4.5s;
+}
+
+@keyframes fadein {
+  from { bottom: 0;    opacity: 0; }
+  to   { bottom: 50px; opacity: 1; }
+}
+
+@keyframes fadeout {
+  from { bottom: 50px; opacity: 1; }
+  to   { bottom: 0;    opacity: 0; }
+}
+
 .glyphicon-spin {
   -webkit-animation: spin 1000ms infinite linear;
   animation: spin 1000ms infinite linear;

js/inputbar.js

@@ -217,6 +217,18 @@ weechat.directive('inputBar', function() {
                 // Extract nick from bufferline prefix
                 var nick = prefix[prefix.length - 1].text;
 
+                // Check whether the user is still online
+                var buffer = models.getBuffer(bufferline.buffer);
+                var is_online = buffer.queryNicklist(nick);
+                if (!is_online) {
+                    // show a toast that the user left
+                    var toast = document.createElement('div');
+                    toast.id = "toast";
+                    toast.innerHTML = nick + " has left the room";
+                    document.body.appendChild(toast);
+                    setTimeout(function() { document.body.removeChild(toast); }, 5000);
+                }
+
                 var newValue = $scope.command || '';  // can be undefined, in that case, use the empty string
                 var addColon = newValue.length === 0;
                 if (newValue.length > 0) {

js/models.js

@@ -308,6 +308,19 @@ models.service('models', ['$rootScope', '$filter', 'bufferResume', function($roo
             return nicklist.hasOwnProperty('root');
         };
 
+        // Check whether a particular nick is in the nicklist
+        var queryNicklist = function(nick) {
+            for (var groupIdx in nicklist) {
+                var nicks = nicklist[groupIdx].nicks;
+                for (var nickIdx in nicks)  {
+                    if (nicks[nickIdx].name === nick) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        };
+
         /* Clear all our buffer lines */
         var clear = function() {
             while(lines.length > 0) {
@@ -353,6 +366,7 @@ models.service('models', ['$rootScope', '$filter', 'bufferResume', function($roo
             isNicklistEmpty: isNicklistEmpty,
             nicklistRequested: nicklistRequested,
             pinned: pinned,
+            queryNicklist: queryNicklist,
         };
 
     };