import {encode, decode} from 'uint8-to-base64'; // transform /path/to/file.ext to file.ext export function basename(path = '') { return path ? path.replace(/^.*\//, '') : ''; } // transform /path/to/file.ext to .ext export function extname(path = '') { const [_, ext] = /.+(\.[^.]+)$/.exec(path) || []; return ext || ''; } // test whether a variable is an object export function isObject(obj) { return Object.prototype.toString.call(obj) === '[object Object]'; } // returns whether a dark theme is enabled export function isDarkTheme() { const style = window.getComputedStyle(document.documentElement); return style.getPropertyValue('--is-dark-theme').trim().toLowerCase() === 'true'; } // strip <tags> from a string export function stripTags(text) { return text.replace(/<[^>]*>?/g, ''); } export function parseIssueHref(href) { const path = (href || '').replace(/[#?].*$/, ''); const [_, owner, repo, type, index] = /([^/]+)\/([^/]+)\/(issues|pulls)\/([0-9]+)/.exec(path) || []; return {owner, repo, type, index}; } // parse a URL, either relative '/path' or absolute 'https://localhost/path' export function parseUrl(str) { return new URL(str, str.startsWith('http') ? undefined : window.location.origin); } // return current locale chosen by user export function getCurrentLocale() { return document.documentElement.lang; } // given a month (0-11), returns it in the documents language export function translateMonth(month) { return new Date(Date.UTC(2022, month, 12)).toLocaleString(getCurrentLocale(), {month: 'short', timeZone: 'UTC'}); } // given a weekday (0-6, Sunday to Saturday), returns it in the documents language export function translateDay(day) { return new Date(Date.UTC(2022, 7, day)).toLocaleString(getCurrentLocale(), {weekday: 'short', timeZone: 'UTC'}); } // convert a Blob to a DataURI export function blobToDataURI(blob) { return new Promise((resolve, reject) => { try { const reader = new FileReader(); reader.addEventListener('load', (e) => { resolve(e.target.result); }); reader.addEventListener('error', () => { reject(new Error('FileReader failed')); }); reader.readAsDataURL(blob); } catch (err) { reject(err); } }); } // convert image Blob to another mime-type format. export function convertImage(blob, mime) { return new Promise(async (resolve, reject) => { try { const img = new Image(); const canvas = document.createElement('canvas'); img.addEventListener('load', () => { try { canvas.width = img.naturalWidth; canvas.height = img.naturalHeight; const context = canvas.getContext('2d'); context.drawImage(img, 0, 0); canvas.toBlob((blob) => { if (!(blob instanceof Blob)) return reject(new Error('imageBlobToPng failed')); resolve(blob); }, mime); } catch (err) { reject(err); } }); img.addEventListener('error', () => { reject(new Error('imageBlobToPng failed')); }); img.src = await blobToDataURI(blob); } catch (err) { reject(err); } }); } export function toAbsoluteUrl(url) { if (url.startsWith('http://') || url.startsWith('https://')) { return url; } if (url.startsWith('//')) { return `${window.location.protocol}${url}`; // it's also a somewhat absolute URL (with the current scheme) } if (url && !url.startsWith('/')) { throw new Error('unsupported url, it should either start with / or http(s)://'); } return `${window.location.origin}${url}`; } // Encode an ArrayBuffer into a URLEncoded base64 string. export function encodeURLEncodedBase64(arrayBuffer) { return encode(arrayBuffer) .replace(/\+/g, '-') .replace(/\//g, '_') .replace(/=/g, ''); } // Decode a URLEncoded base64 to an ArrayBuffer string. export function decodeURLEncodedBase64(base64url) { return decode(base64url .replace(/_/g, '/') .replace(/-/g, '+')); }