const b64 = require('base64-js'); function arrayToB64(array) { return b64 .fromByteArray(array) .replace(/\+/g, '-') .replace(/\//g, '_') .replace(/=/g, ''); } function b64ToArray(str) { str = (str + '==='.slice((str.length + 3) % 4)) .replace(/-/g, '+') .replace(/_/g, '/'); return b64.toByteArray(str); } function loadShim(polyfill) { return new Promise((resolve, reject) => { const shim = document.createElement('script'); shim.src = polyfill; shim.addEventListener('load', () => resolve(true)); shim.addEventListener('error', () => resolve(false)); document.head.appendChild(shim); }); } async function canHasSend(polyfill) { try { const key = await window.crypto.subtle.generateKey( { name: 'AES-GCM', length: 128 }, true, ['encrypt', 'decrypt'] ); await window.crypto.subtle.encrypt( { name: 'AES-GCM', iv: window.crypto.getRandomValues(new Uint8Array(12)), tagLength: 128 }, key, new ArrayBuffer(8) ); return true; } catch (err) { return loadShim(polyfill); } } function isFile(id) { return /^[0-9a-fA-F]{10}$/.test(id); } function copyToClipboard(str) { const aux = document.createElement('input'); aux.setAttribute('value', str); aux.contentEditable = true; aux.readOnly = true; document.body.appendChild(aux); if (navigator.userAgent.match(/iphone|ipad|ipod/i)) { const range = document.createRange(); range.selectNodeContents(aux); const sel = window.getSelection(); sel.removeAllRanges(); sel.addRange(range); aux.setSelectionRange(0, str.length); } else { aux.select(); } const result = document.execCommand('copy'); document.body.removeChild(aux); return result; } const LOCALIZE_NUMBERS = !!( typeof Intl === 'object' && Intl && typeof Intl.NumberFormat === 'function' && typeof navigator === 'object' ); const UNITS = ['B', 'kB', 'MB', 'GB']; function bytes(num) { if (num < 1) { return '0B'; } const exponent = Math.min(Math.floor(Math.log10(num) / 3), UNITS.length - 1); const n = Number(num / Math.pow(1000, exponent)); let nStr = n.toFixed(1); if (LOCALIZE_NUMBERS) { try { const locale = document.querySelector('html').lang; nStr = n.toLocaleString(locale, { minimumFractionDigits: 1, maximumFractionDigits: 1 }); } catch (e) { // fall through } } return `${nStr}${UNITS[exponent]}`; } function percent(ratio) { if (LOCALIZE_NUMBERS) { try { const locale = document.querySelector('html').lang; return ratio.toLocaleString(locale, { style: 'percent' }); } catch (e) { // fall through } } return `${Math.floor(ratio * 100)}%`; } function allowedCopy() { const support = !!document.queryCommandSupported; return support ? document.queryCommandSupported('copy') : false; } function delay(delay = 100) { return new Promise(resolve => setTimeout(resolve, delay)); } function fadeOut(id) { const classes = document.getElementById(id).classList; classes.remove('fadeIn'); classes.add('fadeOut'); return delay(300); } function saveFile(file) { const dataView = new DataView(file.plaintext); const blob = new Blob([dataView], { type: file.type }); const downloadUrl = URL.createObjectURL(blob); if (window.navigator.msSaveBlob) { return window.navigator.msSaveBlob(blob, file.name); } const a = document.createElement('a'); a.href = downloadUrl; a.download = file.name; document.body.appendChild(a); a.click(); URL.revokeObjectURL(downloadUrl); } function openLinksInNewTab(links, should = true) { links = links || Array.from(document.querySelectorAll('a:not([target])')); if (should) { links.forEach(l => { l.setAttribute('target', '_blank'); l.setAttribute('rel', 'noopener noreferrer'); }); } else { links.forEach(l => { l.removeAttribute('target'); l.removeAttribute('rel'); }); } return links; } module.exports = { fadeOut, delay, allowedCopy, bytes, percent, copyToClipboard, arrayToB64, b64ToArray, canHasSend, isFile, saveFile, openLinksInNewTab };