Rewrite session check component in vanilla js

assets/js/components/session-check.js

@@ -0,0 +1,10 @@
+KB.interval(60, function () {
+    var statusUrl = KB.find('body').data('statusUrl');
+    var loginUrl = KB.find('body').data('loginUrl');
+
+    if (KB.find('.form-login') === null) {
+        KB.http.get(statusUrl).error(function () {
+            window.location = loginUrl;
+        });
+    }
+});

assets/js/core/base.js

@@ -88,3 +88,7 @@ KB.render = function () {
         }
     }
 };
+
+KB.interval = function (seconds, callback) {
+    setInterval(callback, seconds * 1000);
+};

assets/js/src/Session.js

@@ -1,21 +0,0 @@
-Kanboard.Session = function(app) {
-    this.app = app;
-};
-
-Kanboard.Session.prototype.execute = function() {
-    window.setInterval(this.checkSession, 60000);
-};
-
-Kanboard.Session.prototype.checkSession = function() {
-    if (! $(".form-login").length) {
-        $.ajax({
-            cache: false,
-            url: $("body").data("status-url"),
-            statusCode: {
-                401: function() {
-                    window.location = $("body").data("login-url");
-                }
-            }
-        });
-    }
-};