hy-desktop-menu-links.tsx

export interface ShortcutLinks {
  shortcut_title: string;
  shortcut_url: string;
  shortcut_is_external: string;
  shortcut_aria_label: string;
}

export interface DesktopLinks {
  label: string;
  url: string;
  description: string;
  menuLinkId: string;
  isActive: string;
  items: Array<DesktopLinks>;
  shortcuts: Array<ShortcutLinks>;
}

import {ColorVariant} from '../../../utils/utils';
import {Component, h, Element, Prop, State, Watch} from '@stencil/core';

@Component({
  tag: 'hy-desktop-menu-links',
  styleUrl: 'hy-desktop-menu-links.scss',
  shadow: true,
})
export class HyDesktopMenuLinks {
  @Element() el: HTMLElement;
  /*
  First level menu links to be displayed on Desktop screens.
  * */
  @Prop() dataDesktopLinks: DesktopLinks[] | string;
  private _dataDesktopLinks: DesktopLinks[];
  @State() firstLevelLinksList: Array<object> = [];
  @State() menuLinkItems: Array<object> = [];

  @Watch('dataDesktopLinks') dataDesktopLinksWatcher(data: DesktopLinks[] | string) {
    this._dataDesktopLinks = typeof data === 'string' ? JSON.parse(data) : data;
  }

  componentWillLoad() {
    this.dataDesktopLinksWatcher(this.dataDesktopLinks);
  }

  handleDesktopMenuClose() {
    const menuItems = this.el.shadowRoot.querySelectorAll(`.desktop-menu-link`);
    const menuPanelItems = this.el.shadowRoot.querySelectorAll('.hy-desktop-menu-panel');
    const activeMenuItem = this.el.shadowRoot.querySelector(`.desktop-menu-link[aria-expanded="true"]`);

    // Return focus to the button of the last desktop panel that was active.
    if (activeMenuItem !== null) (activeMenuItem as HTMLElement).focus();

    // Reset elements by removing the active classes.
    menuItems.forEach((item) => {
      item.classList.remove('desktop-menu-link--is-active');
      item.setAttribute('aria-expanded', 'false');
    });
    menuPanelItems.forEach((item) => {
      item.classList.remove('hy-desktop-menu-panel--is-active');
      item.setAttribute('aria-hidden', 'true');
    });
  }

  handleDesktopMenuToggle(id) {
    const menuItems = this.el.shadowRoot.querySelectorAll(`.desktop-menu-link`);
    const menuPanelItems = this.el.shadowRoot.querySelectorAll('.hy-desktop-menu-panel');
    const activeMenuItem = this.el.shadowRoot.querySelector(`.desktop-menu-link[link-id="${id}"]`);
    const activeMenuItemSibling = activeMenuItem.nextElementSibling;

    // Reset elements by removing the active classes.
    menuItems.forEach((item) => {
      item.classList.remove('desktop-menu-link--is-active');
      item.setAttribute('aria-expanded', 'false');
    });
    menuPanelItems.forEach((item) => {
      item.classList.remove('hy-desktop-menu-panel--is-active');
      item.setAttribute('aria-hidden', 'true');
    });

    // Add active classes to the currently active item and its sibling element.
    activeMenuItem.classList.add('desktop-menu-link--is-active');
    activeMenuItem.setAttribute('aria-expanded', 'true');
    activeMenuItemSibling.classList.add('hy-desktop-menu-panel--is-active');
    activeMenuItemSibling.setAttribute('aria-hidden', 'false');
  }

  componentDidLoad() {
    const links = this._dataDesktopLinks as Array<DesktopLinks>;

    let menuLinkItems = [];

    links.map(({menuLinkId: id, shortcuts, items, url, description, label}) => {
      menuLinkItems.push(
        <li>
          <button
            type="button"
            class="desktop-menu-link"
            link-id={id}
            onMouseOver={() => this.handleDesktopMenuToggle(id)}
            onFocus={() => this.handleDesktopMenuToggle(id)}
            aria-expanded="false"
          >
            {label}
            <span class="desktop-menu-link__heading__icon">
              <hy-icon icon={'hy-icon-caret-down'} size={16} />
            </span>
          </button>
          <div class="hy-desktop-menu-panel" onMouseLeave={() => this.handleDesktopMenuClose()} aria-hidden="true">
            <div class="hy-desktop-menu-panel__desktop-menu">
              <a aria-current={label} href={url} class="" menu-link-id={id}>
                <span class="heading-icon-first">
                  <hy-icon icon={'hy-icon-arrow-right'} size={40} />
                </span>
                <span class="hy-menu-item__label">{label}</span>
                <span class="hy-menu-item__description">{description}</span>
              </a>
              <ul class={'desktop-menu first'} menu-link-id={id}>
                {items.map(({label, url, description}) => (
                  <li>
                    <a href={url}>{label}</a>
                    <span>{description}</span>
                  </li>
                ))}
              </ul>
              {shortcuts.length > 0 && (
                <ul class="shortcuts-panel">
                  <h2 class="shortcuts-panel__title">{'Shortcuts'}</h2>
                  {shortcuts.map(({shortcut_title, shortcut_url, shortcut_is_external, shortcut_aria_label}, index) => {
                    let target = shortcut_is_external ? '_blank' : '_self';

                    let shortcutClass = [
                      'shortcuts-panel__shortcut-item',
                      index == 0 ? 'shortcuts-panel__shortcut-item__first' : '',
                    ].join(' ');

                    return (
                      <li class={shortcutClass}>
                        <a
                          aria-current={shortcut_aria_label}
                          href={shortcut_url}
                          class="shortcut-item__link"
                          target={target}
                          aria-label={shortcut_aria_label}
                        >
                          <span class="shortcut-item__label">{shortcut_title}</span>
                          <span class="shortcut-item__icon">
                            <hy-icon icon={'hy-icon-arrow-right'} size={24} />
                          </span>
                        </a>
                      </li>
                    );
                  })}
                </ul>
              )}
            </div>
            <button
              onClick={() => this.handleDesktopMenuClose()}
              class={{
                'hy-desktop-menu-panel__panel-toggle': true,
              }}
              aria-label="Close menu"
            >
              <span class="hy-desktop-menu-panel__panel-toggle__label">
                CLOSE
                <hy-icon icon={'hy-icon-remove'} size={20} fill={ColorVariant.black} />
              </span>
            </button>
          </div>
        </li>
      );
    });

    this.menuLinkItems = menuLinkItems;
  }

  render() {
    return (
      <nav role={'navigation'} class="hy-site-header__menu-desktop">
        <ul class="hy-site-header__menu-desktop-container">{this.menuLinkItems}</ul>
      </nav>
    );
  }
}