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/**
* This script handles the mode customization for the Hugo / Hinode website.
* GDPR compliance: User click on the save button after selected a mode.
* It provides a dark mode, light mode, and auto mode based on the user's preference.
* The selected theme is saved with an icon in the localStorage for persistence across sessions.
*
* @author d.o.it - Dominik Oswald
* @version 1.0.0
*/
{{- if site.Params.main.enableDarkMode -}}
(() => {
'use strict'
// Retrieve the theme from localStorage, default to 'auto'
let selectedTheme = localStorage.getItem('themeMode') || 'auto';
// Define the SVG paths for the theme icons
const themeIcons = {
light: '<path d="M8 11a3 3 0 1 1 0-6 3 3 0 0 1 0 6zm0 1a4 4 0 1 0 0-8 4 4 0 0 0 0 8zM8 0a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 0zm0 13a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 13zm8-5a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2a.5.5 0 0 1 .5.5zM3 8a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2A.5.5 0 0 1 3 8zm10.657-5.657a.5.5 0 0 1 0 .707l-1.414 1.415a.5.5 0 1 1-.707-.708l1.414-1.414a.5.5 0 0 1 .707 0zm-9.193 9.193a.5.5 0 0 1 0 .707L3.05 13.657a.5.5 0 0 1-.707-.707l1.414-1.414a.5.5 0 0 1 .707 0zm9.193 2.121a.5.5 0 0 1-.707 0l-1.414-1.414a.5.5 0 0 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .707zM4.464 4.465a.5.5 0 0 1-.707 0L2.343 3.05a.5.5 0 1 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .708z"/>',
dark: '<path d="M6 .278a.768.768 0 0 1 .08.858 7.208 7.208 0 0 0-.878 3.46c0 4.021 3.278 7.277 7.318 7.277.527 0 1.04-.055 1.533-.16a.787.787 0 0 1 .81.316.733.733 0 0 1-.031.893A8.349 8.349 0 0 1 8.344 16C3.734 16 0 12.286 0 7.71 0 4.266 2.114 1.312 5.124.06A.752.752 0 0 1 6 .278zM4.858 1.311A7.269 7.269 0 0 0 1.025 7.71c0 4.02 3.279 7.276 7.319 7.276a7.316 7.316 0 0 0 5.205-2.162c-.337.042-.68.063-1.029.063-4.61 0-8.343-3.714-8.343-8.29 0-1.167.242-2.278.681-3.286z"/>',
auto: '<path d="M8 15A7 7 0 1 0 8 1v14zm0 1A8 8 0 1 1 8 0a8 8 0 0 1 0 16z"/>'
};
// Function to retrieve the theme preferred by the client, defaults to light
function getPreferredTheme() {
return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
}
// Function to update the theme display with the selected theme icon
function updateThemeDisplay(theme) {
const currentThemeIcon = document.getElementById('currentThemeIcon');
currentThemeIcon.innerHTML = themeIcons[theme];
}
// Function to select and apply the theme
function selectTheme(theme) {
updateThemeDisplay(theme);
const options = document.querySelectorAll('.theme-option');
options.forEach(option => {
if (option.dataset.theme === theme) {
option.classList.add('active');
option.querySelector('.save-icon').classList.replace('d-none', 'd-inline-block');
} else {
option.classList.remove('active');
option.querySelector('.save-icon').classList.replace('d-inline-block', 'd-none');
}
});
setTheme(theme);
}
// Function to apply the requested theme
function setTheme(theme) {
if (theme === 'auto') {
document.documentElement.setAttribute('data-bs-theme', (getPreferredTheme()))
} else {
document.documentElement.setAttribute('data-bs-theme', theme)
}
}
// Function to save the selected theme and show a toast notification
function saveAndToastTheme(theme) {
setTheme(theme);
// Only save to the localStorage after the user clicks on the save button
localStorage.setItem('themeMode', theme);
// Show toast from navbar-mode.html
var myToastEl = document.getElementById('liveToastSaveThemMode')
var toast = bootstrap.Toast.getOrCreateInstance(myToastEl)
toast.show();
}
// Function to handle the click event on the theme mode options
function onClickThemeMode(element) {
const theme = element.getAttribute('data-theme');
selectTheme(theme);
}
// Function to handle the click event on the save theme mode button
function onClickSaveThemeMode(element) {
const theme = element.getAttribute('data-theme');
saveAndToastTheme(theme);
}
// Event listener to handle the change in the user's preferred color scheme
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
if (storedTheme !== 'light' || storedTheme !== 'dark') {
selectTheme(getPreferredTheme())
}
})
// Event listener to handle the DOMContentLoaded event
window.addEventListener('DOMContentLoaded', () => {
// selectedTheme -> the theme from localStorage
selectTheme(selectedTheme);
const options = document.querySelectorAll('.theme-option');
options.forEach(option => {
option.addEventListener('click', (e) => {
const theme = option.dataset.theme;
if (e.target.classList.contains('save-icon')) {
saveAndToastTheme(theme);
} else {
selectTheme(theme);
e.stopPropagation();
}
});
});
})
})()
{{- end -}}
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