import {svg} from '../svg.ts';
import {htmlEscape} from 'escape-goat';
import {clippie} from 'clippie';
import {showTemporaryTooltip} from '../modules/tippy.ts';
import {GET, POST} from '../modules/fetch.ts';
import {showErrorToast} from '../modules/toast.ts';
import {createElementFromHTML, createElementFromAttrs} from '../utils/dom.ts';
import {isImageFile, isVideoFile} from '../utils.ts';
import type {DropzoneFile, DropzoneOptions} from 'dropzone/index.js';
const {csrfToken, i18n} = window.config;
type CustomDropzoneFile = DropzoneFile & {uuid: string};
// dropzone has its owner event dispatcher (emitter)
export const DropzoneCustomEventReloadFiles = 'dropzone-custom-reload-files';
export const DropzoneCustomEventRemovedFile = 'dropzone-custom-removed-file';
export const DropzoneCustomEventUploadDone = 'dropzone-custom-upload-done';
async function createDropzone(el: HTMLElement, opts: DropzoneOptions) {
const [{default: Dropzone}] = await Promise.all([
import(/* webpackChunkName: "dropzone" */'dropzone'),
import(/* webpackChunkName: "dropzone" */'dropzone/dist/dropzone.css'),
]);
return new Dropzone(el, opts);
}
export function generateMarkdownLinkForAttachment(file: Partial<CustomDropzoneFile>, {width, dppx}: {width?: number, dppx?: number} = {}) {
let fileMarkdown = `[${file.name}](/attachments/${file.uuid})`;
if (isImageFile(file)) {
fileMarkdown = `!${fileMarkdown}`;
if (width > 0 && dppx > 1) {
// Scale down images from HiDPI monitors. This uses the <img> tag because it's the only
// method to change image size in Markdown that is supported by all implementations.
// Make the image link relative to the repo path, then the final URL is "/sub-path/owner/repo/attachments/{uuid}"
fileMarkdown = `<img width="${Math.round(width / dppx)}" alt="${htmlEscape(file.name)}" src="attachments/${htmlEscape(file.uuid)}">`;
} else {
// Markdown always renders the image with a relative path, so the final URL is "/sub-path/owner/repo/attachments/{uuid}"
// TODO: it should also use relative path for consistency, because absolute is ambiguous for "/sub-path/attachments" or "/attachments"
fileMarkdown = ``;
}
} else if (isVideoFile(file)) {
fileMarkdown = `<video src="attachments/${htmlEscape(file.uuid)}" title="${htmlEscape(file.name)}" controls></video>`;
}
return fileMarkdown;
}
function addCopyLink(file: Partial<CustomDropzoneFile>) {
// Create a "Copy Link" element, to conveniently copy the image or file link as Markdown to the clipboard
// The "<a>" element has a hardcoded cursor: pointer because the default is overridden by .dropzone
const copyLinkEl = createElementFromHTML(`
<div class="tw-text-center">
<a href="#" class="tw-cursor-pointer">${svg('octicon-copy', 14)} Copy link</a>
</div>`);
copyLinkEl.addEventListener('click', async (e) => {
e.preventDefault();
const success = await clippie(generateMarkdownLinkForAttachment(file));
showTemporaryTooltip(e.target as Element, success ? i18n.copy_success : i18n.copy_error);
});
file.previewTemplate.append(copyLinkEl);
}
type FileUuidDict = Record<string, {submitted: boolean}>;
/**
* @param {HTMLElement} dropzoneEl
*/
export async function initDropzone(dropzoneEl: HTMLElement) {
const listAttachmentsUrl = dropzoneEl.closest('[data-attachment-url]')?.getAttribute('data-attachment-url');
const removeAttachmentUrl = dropzoneEl.getAttribute('data-remove-url');
const attachmentBaseLinkUrl = dropzoneEl.getAttribute('data-link-url');
let disableRemovedfileEvent = false; // when resetting the dropzone (removeAllFiles), disable the "removedfile" event
let fileUuidDict: FileUuidDict = {}; // to record: if a comment has been saved, then the uploaded files won't be deleted from server when clicking the Remove in the dropzone
const opts: Record<string, any> = {
url: dropzoneEl.getAttribute('data-upload-url'),
headers: {'X-Csrf-Token': csrfToken},
acceptedFiles: ['*/*', ''].includes(dropzoneEl.getAttribute('data-accepts')) ? null : dropzoneEl.getAttribute('data-accepts'),
addRemoveLinks: true,
dictDefaultMessage: dropzoneEl.getAttribute('data-default-message'),
dictInvalidFileType: dropzoneEl.getAttribute('data-invalid-input-type'),
dictFileTooBig: dropzoneEl.getAttribute('data-file-too-big'),
dictRemoveFile: dropzoneEl.getAttribute('data-remove-file'),
timeout: 0,
thumbnailMethod: 'contain',
thumbnailWidth: 480,
thumbnailHeight: 480,
};
if (dropzoneEl.hasAttribute('data-max-file')) opts.maxFiles = Number(dropzoneEl.getAttribute('data-max-file'));
if (dropzoneEl.hasAttribute('data-max-size')) opts.maxFilesize = Number(dropzoneEl.getAttribute('data-max-size'));
// there is a bug in dropzone: if a non-image file is uploaded, then it tries to request the file from server by something like:
// "http://localhost:3000/owner/repo/issues/[object%20Event]"
// the reason is that the preview "callback(dataURL)" is assign to "img.onerror" then "thumbnail" uses the error object as the dataURL and generates '<img src="[object Event]">'
const dzInst = await createDropzone(dropzoneEl, opts);
dzInst.on('success', (file: CustomDropzoneFile, resp: any) => {
file.uuid = resp.uuid;
fileUuidDict[file.uuid] = {submitted: false};
const input = createElementFromAttrs('input', {name: 'files', type: 'hidden', id: `dropzone-file-${resp.uuid}`, value: resp.uuid});
dropzoneEl.querySelector('.files').append(input);
addCopyLink(file);
dzInst.emit(DropzoneCustomEventUploadDone, {file});
});
dzInst.on('removedfile', async (file: CustomDropzoneFile) => {
if (disableRemovedfileEvent) return;
dzInst.emit(DropzoneCustomEventRemovedFile, {fileUuid: file.uuid});
document.querySelector(`#dropzone-file-${file.uuid}`)?.remove();
// when the uploaded file number reaches the limit, there is no uuid in the dict, and it doesn't need to be removed from server
if (removeAttachmentUrl && fileUuidDict[file.uuid] && !fileUuidDict[file.uuid].submitted) {
await POST(removeAttachmentUrl, {data: new URLSearchParams({file: file.uuid})});
}
});
dzInst.on('submit', () => {
for (const fileUuid of Object.keys(fileUuidDict)) {
fileUuidDict[fileUuid].submitted = true;
}
});
dzInst.on(DropzoneCustomEventReloadFiles, async () => {
try {
const resp = await GET(listAttachmentsUrl);
const respData = await resp.json();
// do not trigger the "removedfile" event, otherwise the attachments would be deleted from server
disableRemovedfileEvent = true;
dzInst.removeAllFiles(true);
disableRemovedfileEvent = false;
dropzoneEl.querySelector('.files').innerHTML = '';
for (const el of dropzoneEl.querySelectorAll('.dz-preview')) el.remove();
fileUuidDict = {};
for (const attachment of respData) {
const file = {name: attachment.name, uuid: attachment.uuid, size: attachment.size};
dzInst.emit('addedfile', file);
dzInst.emit('complete', file);
if (isImageFile(file.name)) {
const imgSrc = `${attachmentBaseLinkUrl}/${file.uuid}`;
dzInst.emit('thumbnail', file, imgSrc);
}
addCopyLink(file); // it is from server response, so no "type"
fileUuidDict[file.uuid] = {submitted: true};
const input = createElementFromAttrs('input', {name: 'files', type: 'hidden', id: `dropzone-file-${file.uuid}`, value: file.uuid});
dropzoneEl.querySelector('.files').append(input);
}
if (!dropzoneEl.querySelector('.dz-preview')) {
dropzoneEl.classList.remove('dz-started');
}
} catch (error) {
// TODO: if listing the existing attachments failed, it should stop from operating the content or attachments,
// otherwise the attachments might be lost.
showErrorToast(`Failed to load attachments: ${error}`);
console.error(error);
}
});
dzInst.on('error', (file, message) => {
showErrorToast(`Dropzone upload error: ${message}`);
dzInst.removeFile(file);
});
if (listAttachmentsUrl) dzInst.emit(DropzoneCustomEventReloadFiles);
return dzInst;
}