Files
BetterSEQTA-Plus/public/backgrounds/themeManager.js
T
SethBurkart123 d723c128e4 refactor code
2023-10-29 09:17:58 +11:00

126 lines
3.5 KiB
JavaScript

/* global localforage */
/**
* 🎨 Theme Management Functions 🎨
*/
/**
* Fetches theme details (CSS, images, className) from a given URL.
* @param {string} url - The URL to fetch theme JSON from.
* @returns {Object} - Theme details including CSS, images, and class name.
*/
async function fetchThemeJSON(url) {
const response = await fetch(url);
if (!response.ok) {
throw new Error(`Failed to fetch theme JSON: ${response.statusText}`);
}
const data = await response.json();
const cssResponse = await fetch(data.css);
if (!cssResponse.ok) {
throw new Error(`Failed to fetch CSS: ${cssResponse.statusText}`);
}
const cssText = await cssResponse.text();
return {
css: cssText,
images: data.images,
className: data.className,
};
}
/**
* Saves theme details to IndexedDB storage via localForage.
* @param {Object} theme - Theme details to be saved.
* @param {string} themeName - The name to identify the theme.
*/
async function saveToIndexedDB(theme, themeName) {
await localforage.setItem(`css_${themeName}`, {
css: theme.css,
className: theme.className,
images: theme.images,
});
for (const [cssVar, imageUrl] of Object.entries(theme.images)) {
try {
const response = await fetch(imageUrl);
if (!response.ok) {
console.error(`Failed to fetch image: ${response.statusText}`);
continue;
}
const blob = await response.blob();
await localforage.setItem(`images_${themeName}_${cssVar}`, blob);
} catch (error) {
console.error(`Error while handling image for ${cssVar}: ${error}`);
}
}
}
/**
* Applies theme from storage to the document.
* @param {string} themeName - The name of the theme to apply.
*/
async function applyTheme(themeName) {
const themeData = await localforage.getItem(`css_${themeName}`);
if (!themeData) {
throw new Error(`No theme data found for ${themeName}`);
}
const style = document.createElement("style");
style.innerHTML = themeData.css;
document.head.appendChild(style);
document.body.className = themeData.className;
if (themeData.images) {
for (const cssVar of Object.keys(themeData.images)) {
const imageData = await localforage.getItem(`images_${themeName}_${cssVar}`);
const objectURL = URL.createObjectURL(imageData);
document.documentElement.style.setProperty(cssVar, `url(${objectURL})`);
}
} else {
console.error("themeData.images is not defined!");
}
}
/**
* 🛠️ Utility Functions 🛠️
*/
/**
* Saves the list of available themes to local storage.
* @param {Array} themeList - An array of available themes.
*/
function saveAvailableThemes(themeList) {
localStorage.setItem("availableThemes", JSON.stringify(themeList));
}
/**
* Sets the currently selected theme in local storage.
* @param {string} themeName - The name of the selected theme.
*/
function setSelectedTheme(themeName) {
localStorage.setItem("selectedTheme", themeName);
}
/**
* 🚀 Main Function to Orchestrate Everything 🚀
*/
(async () => {
try {
const availableThemes = [
{ name: "dark", url: "https://raw.githubusercontent.com/SethBurkart123/BetterSEQTA-Themes/main/themes/test.json" },
];
saveAvailableThemes(availableThemes);
const themeToApply = availableThemes[0].name;
const themeData = await fetchThemeJSON(availableThemes[0].url);
await saveToIndexedDB(themeData, themeToApply);
setSelectedTheme(themeToApply);
await applyTheme(themeToApply);
} catch (error) {
console.error(`An error occurred: ${error}`);
}
})();