1 files changed, 100 insertions, 0 deletions
diff --git a/app/assets/javascripts/pages/shared/wikis/wikis.js b/app/assets/javascripts/pages/shared/wikis/wikis.js
new file mode 100644
index 00000000000..ed67219383b
--- /dev/null
+++ b/app/assets/javascripts/pages/shared/wikis/wikis.js
@@ -0,0 +1,100 @@
+import { GlBreakpointInstance as bp } from '@gitlab/ui/dist/utils';
+import { s__, sprintf } from '~/locale';
+
+const MARKDOWN_LINK_TEXT = {
+  markdown: '[Link Title](page-slug)',
+  rdoc: '{Link title}[link:page-slug]',
+  asciidoc: 'link:page-slug[Link title]',
+  org: '[[page-slug]]',
+};
+
+export default class Wikis {
+  constructor() {
+    this.sidebarEl = document.querySelector('.js-wiki-sidebar');
+    this.sidebarExpanded = false;
+
+    const sidebarToggles = document.querySelectorAll('.js-sidebar-wiki-toggle');
+    for (let i = 0; i < sidebarToggles.length; i += 1) {
+      sidebarToggles[i].addEventListener('click', e => this.handleToggleSidebar(e));
+    }
+
+    this.isNewWikiPage = Boolean(document.querySelector('.js-new-wiki-page'));
+    this.editTitleInput = document.querySelector('form.wiki-form #wiki_title');
+    this.commitMessageInput = document.querySelector('form.wiki-form #wiki_message');
+    this.commitMessageI18n = this.isNewWikiPage
+      ? s__('WikiPageCreate|Create %{pageTitle}')
+      : s__('WikiPageEdit|Update %{pageTitle}');
+
+    if (this.editTitleInput) {
+      // Initialize the commit message on load
+      if (this.editTitleInput.value) this.setWikiCommitMessage(this.editTitleInput.value);
+
+      // Set the commit message as the page title is changed
+      this.editTitleInput.addEventListener('keyup', e => this.handleWikiTitleChange(e));
+    }
+
+    window.addEventListener('resize', () => this.renderSidebar());
+    this.renderSidebar();
+
+    const changeFormatSelect = document.querySelector('#wiki_format');
+    const linkExample = document.querySelector('.js-markup-link-example');
+
+    if (changeFormatSelect) {
+      changeFormatSelect.addEventListener('change', e => {
+        linkExample.innerHTML = MARKDOWN_LINK_TEXT[e.target.value];
+      });
+    }
+
+    const wikiTextarea = document.querySelector('form.wiki-form #wiki_content');
+    const wikiForm = document.querySelector('form.wiki-form');
+
+    if (wikiTextarea) {
+      wikiTextarea.addEventListener('input', () => {
+        window.onbeforeunload = () => '';
+      });
+
+      wikiForm.addEventListener('submit', () => {
+        window.onbeforeunload = null;
+      });
+    }
+  }
+
+  handleWikiTitleChange(e) {
+    this.setWikiCommitMessage(e.target.value);
+  }
+
+  setWikiCommitMessage(rawTitle) {
+    let title = rawTitle;
+
+    // Replace hyphens with spaces
+    if (title) title = title.replace(/-+/g, ' ');
+
+    const newCommitMessage = sprintf(this.commitMessageI18n, { pageTitle: title }, false);
+    this.commitMessageInput.value = newCommitMessage;
+  }
+
+  handleToggleSidebar(e) {
+    e.preventDefault();
+    this.sidebarExpanded = !this.sidebarExpanded;
+    this.renderSidebar();
+  }
+
+  static sidebarCanCollapse() {
+    const bootstrapBreakpoint = bp.getBreakpointSize();
+    return bootstrapBreakpoint === 'xs' || bootstrapBreakpoint === 'sm';
+  }
+
+  renderSidebar() {
+    if (!this.sidebarEl) return;
+    const { classList } = this.sidebarEl;
+    if (this.sidebarExpanded || !Wikis.sidebarCanCollapse()) {
+      if (!classList.contains('right-sidebar-expanded')) {
+        classList.remove('right-sidebar-collapsed');
+        classList.add('right-sidebar-expanded');
+      }
+    } else if (classList.contains('right-sidebar-expanded')) {
+      classList.add('right-sidebar-collapsed');
+      classList.remove('right-sidebar-expanded');
+    }
+  }
+}