feat: Update public portal colors with new design (#8230)

app/javascript/portal/portalThemeHelper.js

@@ -0,0 +1,127 @@
+import { adjustColorForContrast } from '../shared/helpers/colorHelper.js';
+
+export const setPortalHoverColor = theme => {
+  // This function is to set the hover color for the portal
+  if (theme === 'system') {
+    const prefersDarkMode = window.matchMedia(
+      '(prefers-color-scheme: dark)'
+    ).matches;
+    theme = prefersDarkMode ? 'dark' : 'light';
+  }
+
+  const portalColor = window.portalConfig.portalColor;
+  const bgColor = theme === 'dark' ? '#151718' : 'white';
+  const hoverColor = adjustColorForContrast(portalColor, bgColor);
+
+  // Set hover color for border and text dynamically
+  document.documentElement.style.setProperty(
+    '--dynamic-hover-color',
+    hoverColor
+  );
+};
+
+export const removeQueryParamsFromUrl = (queryParam = 'theme') => {
+  // This function is to remove the theme query param from the URL
+  // This is done so that the theme is not persisted in the URL
+  // This is called when the theme is switched from the dropdown
+  const url = new URL(window.location.href);
+  const param = url.searchParams.get(queryParam);
+
+  if (param) {
+    url.searchParams.delete(queryParam);
+    window.history.replaceState({}, '', url.toString()); // Convert URL to string
+  }
+};
+
+export const updateThemeInHeader = theme => {
+  // This function is to update the theme selection in the header in real time
+  const themeToggleButton = document.getElementById('toggle-appearance');
+
+  if (!themeToggleButton) return;
+  const allElementInButton =
+    themeToggleButton.querySelectorAll('.theme-button');
+
+  if (!allElementInButton) return;
+  allElementInButton.forEach(button => {
+    button.classList.toggle('hidden', button.dataset.theme !== theme);
+    button.classList.toggle('flex', button.dataset.theme === theme);
+  });
+};
+
+export const switchTheme = theme => {
+  if (theme === 'system') {
+    localStorage.removeItem('theme');
+    const prefersDarkMode = window.matchMedia(
+      '(prefers-color-scheme: dark)'
+    ).matches;
+    // remove this so that the system theme is used
+
+    document.documentElement.classList.remove('dark', 'light');
+    document.documentElement.classList.add(prefersDarkMode ? 'dark' : 'light');
+  } else {
+    localStorage.theme = theme;
+
+    document.documentElement.classList.remove('dark', 'light');
+    document.documentElement.classList.add(theme);
+  }
+
+  setPortalHoverColor(theme);
+  updateThemeInHeader(theme);
+  removeQueryParamsFromUrl();
+};
+
+export const initializeThemeSwitchButtons = () => {
+  const appearanceDropdown = document.getElementById('appearance-dropdown');
+  appearanceDropdown.dataset.currentTheme = localStorage.theme || 'system';
+
+  appearanceDropdown.addEventListener('click', event => {
+    const target = event.target.closest('button[data-theme]');
+
+    if (target) {
+      const { theme } = target.dataset;
+      // setting this data property will automatically toggle the checkmark using CSS
+      appearanceDropdown.dataset.currentTheme = theme;
+      switchTheme(theme);
+      // wait for a bit before hiding the dropdown
+      appearanceDropdown.style.display = 'none';
+    }
+  });
+};
+
+export const initializeToggleButton = () => {
+  const themeToggleButton = document.getElementById('toggle-appearance');
+
+  themeToggleButton?.addEventListener('click', () => {
+    const appearanceDropdown = document.getElementById('appearance-dropdown');
+
+    const isCurrentlyHidden = appearanceDropdown.style.display === 'none';
+    // Toggle the appearanceDropdown
+    appearanceDropdown.style.display = isCurrentlyHidden ? 'flex' : 'none';
+  });
+};
+
+export const initializeMediaQueryListener = () => {
+  const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+
+  mediaQuery.addEventListener('change', () => {
+    if (['light', 'dark'].includes(localStorage.theme)) return;
+
+    switchTheme('system');
+  });
+};
+
+export const initializeTheme = () => {
+  if (window.portalConfig.isPlainLayoutEnabled === 'true') return;
+  // start with updating the theme in the header, this will set the current theme on the button
+  // and set the hover color at the start of init, this is set again when the theme is switched
+  setPortalHoverColor(localStorage.theme || 'system');
+  window.updateThemeInHeader = updateThemeInHeader;
+  updateThemeInHeader(localStorage.theme || 'system');
+
+  // add the event listeners for the dropdown toggle and theme buttons
+  initializeToggleButton();
+  initializeThemeSwitchButtons();
+
+  // add the media query listener to update the theme when the system theme changes
+  initializeMediaQueryListener();
+};