89 lines
3.1 KiB
JavaScript
89 lines
3.1 KiB
JavaScript
'use strict';
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(() => {
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document.addEventListener('DOMContentLoaded', (_) => {
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let waiting = false;
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let xhr;
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const shortened = document.getElementById('shortened');
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const info = document.getElementById('info');
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const field = document.getElementById('url');
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const form = document.getElementById('form');
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// Select the full link with one click
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shortened.onclick = () => {
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if (document.body.createTextRange) {
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const range = document.body.createTextRange();
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range.moveToElementText(shortened);
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range.select();
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} else if (window.getSelection) {
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const selection = window.getSelection();
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const range = document.createRange();
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range.selectNodeContents(shortened);
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selection.removeAllRanges();
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selection.addRange(range);
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} else {
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// Highlight unsupported
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}
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};
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// Set up the actual submission
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form.addEventListener('submit', (event) => {
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// We need to create a different body, so prevent the default submission.
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event.preventDefault();
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if (waiting) {
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// Prevent multiple requests.
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return;
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}
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// Get the URL the user is trying to shorten.
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let url = document.getElementById('url').value;
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// If it doesn't have a protocol, assume https.
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if (!/^\w+:\/\/.*$/.test(url)) {
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url = 'https://' + url;
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}
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// Encode the URL as Base64.
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const encoded = btoa(encodeURIComponent(url).replace(/%([0-9A-F]{2})/g, (match, p1) =>
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String.fromCharCode('0x' + p1)
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));
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// POST the body to /shorten.
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xhr = new XMLHttpRequest();
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xhr.open('POST', '/shorten', true);
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xhr.overrideMimeType('text/plain');
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xhr.send(encoded);
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xhr.onload = () => {
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waiting = false;
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switch (xhr.status) {
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case 200:
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let slug = xhr.response;
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const short_link = `${window.location.href}l/${slug}`;
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// Display to the user
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shortened.innerText = short_link;
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info.setAttribute('state', 'info');
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info.innerText = 'Link successfully shortened and copied to your clipboard.';
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// Copy the link to the clipboard
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navigator.clipboard.writeText(short_link);
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break;
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default:
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info.setAttribute('state', 'error');
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info.innerText = xhr.response;
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break;
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}
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};
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xhr.onerror = () => {
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waiting = false;
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info.setAttribute('state', 'error');
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info.innerText = "Failed to shorten the URL. Please try again.";
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};
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});
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});
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})(); |