document.addEventListener('DOMContentLoaded', () => { const form = document.getElementById('upload-form'); if (!form) return; const upload = document.getElementById('file-upload'); const uploadLink = document.getElementById('file-upload-link'); const uploadField = document.getElementById('field-upload'); const neverExpireCheckbox = document.getElementById('field-never_expire'); const expireAfterDaysField = document.getElementById('field-expire_after_days'); const autogenUrlCheckbox = document.getElementById('field-autogen_url'); const slugField = document.getElementById('field-slug'); neverExpireCheckbox.addEventListener('change', () => { expireAfterDaysField.disabled = neverExpireCheckbox.checked; }); autogenUrlCheckbox.addEventListener('change', () => { slugField.disabled = autogenUrlCheckbox.checked; }); let uploadForm; form.addEventListener('submit', e => { e.preventDefault(); if (!uploadForm || uploadForm.isFinished()) { uploadForm = new UploadForm(form, upload, uploadLink, uploadField.files[0].name); uploadForm.updateView(); uploadForm.start(); } }); }); function UploadForm(form, upload, uploadLink, fileName) { this.form = form; this.upload = upload; this.uploadLink = uploadLink; this.fileName = fileName; this.progressBar = this.upload.querySelector('.progress-bar'); this.progressBarContent = this.progressBar.querySelector('.content'); this.status = this.upload.querySelector('.status'); this.speed = this.status.querySelector('.speed'); this.finished = false; this.xferSpeed = []; this.lastTransferTime = null; this.xhr = new XMLHttpRequest(); this.xhr.responseType = 'json'; this.xhr.upload.addEventListener('progress', e => { if (e.lengthComputable) { this.progressBar.classList.remove('undefined'); let percent = ((e.loaded / e.total) * 100).toFixed(2) + '%'; this.progressBar.style = `--progress: ${percent}`; this.progressBarContent.innerText = percent; this.updateSpeed(e.loaded); } else { this.progressBar.classList.add('undefined'); } }); this.xhr.upload.addEventListener('loadstart', () => { this.status.classList.remove('hidden'); }); this.xhr.addEventListener('load', () => { this.finished = true; let response = this.xhr.response; console.log('done', response); if (response.status === 'error') { if (response.messages) { this.restoreView(); window.applyFormMessages(this.form, response.messages); } } else if (response.url) { this.status.innerHTML = 'Done!'; this.uploadLink.querySelector('.content').innerText = response.url; this.uploadLink.classList.remove('hidden'); } else { window.location.reload(); } }); this.xhr.addEventListener('error', (e) => { this.finished = true; console.error('error', e); this.status.innerHTML = 'Error; upload was interrupted.'; }); } UploadForm.prototype.isFinished = function () { return this.finished; } UploadForm.prototype.updateView = function () { this.upload.querySelector('.name').innerText = this.fileName; this.form.classList.add('hidden'); this.upload.classList.remove('hidden'); this.status.innerHTML = `Uploading @ --`; this.speed = this.status.querySelector('.speed'); } UploadForm.prototype.restoreView = function () { this.status.classList.add('hidden'); this.upload.classList.add('hidden'); this.form.classList.remove('hidden'); }; UploadForm.prototype.start = function () { const formData = new FormData(this.form); this.xhr.open('POST', this.form.action); this.xhr.send(formData); } const units = ['K', 'M', 'G', 'T']; UploadForm.prototype.updateSpeed = function (loaded) { const time = new Date().getTime(); if (this.lastTransferTime) { this.xferSpeed.push((loaded - this.lastLoaded) / (time - this.lastTransferTime)); if (this.xferSpeed.length > 100) this.xferSpeed = this.xferSpeed.slice(1); let speed = this.xferSpeed.reduce((v, c) => v + c) / this.xferSpeed.length; let unit = 0; while (speed >= 1000 && unit < units.length - 1) { speed /= 1000; unit++; } this.speed.innerText = (speed).toFixed(2) + units[unit] + 'Bps'; } this.lastTransferTime = time; this.lastLoaded = loaded; }