Fixed Wrong Tab Selected When Loggin Fails And Multiple Login Tabs Exists

When ldap is enabled and use "Standard" authentication method, if authentication fails
the correct tab remain selected.
This is done by saving into localStorage when the active tab changes and by always selecting that tab when
the page is loaded.

3 files changed, 51 insertions, 0 deletions

diff --git a/app/assets/javascripts/dispatcher.js.es6 b/app/assets/javascripts/dispatcher.js.es6
index 16df4b0b005..fb366e2eb88 100644
--- a/app/assets/javascripts/dispatcher.js.es6
+++ b/app/assets/javascripts/dispatcher.js.es6
@@ -24,6 +24,7 @@
       switch (page) {
         case 'sessions:new':
           new UsernameValidator();
+          new ActiveTabMemoizer();
           break;
         case 'projects:boards:show':
         case 'projects:boards:index':
diff --git a/app/assets/javascripts/signin_tabs_memoizer.js.es6 b/app/assets/javascripts/signin_tabs_memoizer.js.es6
new file mode 100644
index 00000000000..d811d1cd53a
--- /dev/null
+++ b/app/assets/javascripts/signin_tabs_memoizer.js.es6
@@ -0,0 +1,49 @@
+/* eslint no-param-reassign: ["error", { "props": false }]*/
+/* eslint no-new: "off" */
+((global) => {
+  /**
+   * Memorize the last selected tab after reloading a page.
+   * Does that setting the current selected tab in the localStorage
+   */
+  class ActiveTabMemoizer {
+    constructor({ currentTabKey = 'current_signin_tab', tabSelector = 'ul.nav-tabs' } = {}) {
+      this.currentTabKey = currentTabKey;
+      this.tabSelector = tabSelector;
+      this.bootstrap();
+    }
+
+    bootstrap() {
+      const tabs = document.querySelectorAll(this.tabSelector);
+      if (tabs.length > 0) {
+        tabs[0].addEventListener('click', (e) => {
+          if (e.target && e.target.nodeName === 'A') {
+            const anchorName = e.target.getAttribute('href');
+            this.saveData(anchorName);
+          }
+        });
+      }
+
+      this.showTab();
+    }
+
+    showTab() {
+      const anchorName = this.readData();
+      if (anchorName) {
+        const tab = document.querySelector(`${this.tabSelector} a[href="${anchorName}"]`);
+        if (tab) {
+          tab.click();
+        }
+      }
+    }
+
+    saveData(val) {
+      localStorage.setItem(this.currentTabKey, val);
+    }
+
+    readData() {
+      return localStorage.getItem(this.currentTabKey);
+    }
+  }
+
+  global.ActiveTabMemoizer = ActiveTabMemoizer;
+})(window);
diff --git a/app/views/devise/sessions/new.html.haml b/app/views/devise/sessions/new.html.haml
index fa8e7979461..af87129e49e 100644
--- a/app/views/devise/sessions/new.html.haml
+++ b/app/views/devise/sessions/new.html.haml
@@ -1,4 +1,5 @@
 - page_title "Sign in"
+
 %div
   - if form_based_providers.any?
     = render 'devise/shared/tabs_ldap'