295 lines
9.5 KiB
JavaScript
295 lines
9.5 KiB
JavaScript
import $ from 'jquery';
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import Dropzone from 'dropzone';
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import _ from 'underscore';
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import './behaviors/preview_markdown';
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import csrf from './lib/utils/csrf';
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import axios from './lib/utils/axios_utils';
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import { n__, __ } from '~/locale';
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Dropzone.autoDiscover = false;
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/**
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* Return the error message string from the given response.
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*
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* @param {String|Object} res
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*/
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function getErrorMessage(res) {
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if (!res || _.isString(res)) {
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return res;
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}
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return res.message;
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}
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export default function dropzoneInput(form) {
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const divHover = '<div class="div-dropzone-hover"></div>';
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const iconPaperclip = '<i class="fa fa-paperclip div-dropzone-icon"></i>';
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const $attachButton = form.find('.button-attach-file');
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const $attachingFileMessage = form.find('.attaching-file-message');
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const $cancelButton = form.find('.button-cancel-uploading-files');
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const $retryLink = form.find('.retry-uploading-link');
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const $uploadProgress = form.find('.uploading-progress');
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const $uploadingErrorContainer = form.find('.uploading-error-container');
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const $uploadingErrorMessage = form.find('.uploading-error-message');
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const $uploadingProgressContainer = form.find('.uploading-progress-container');
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const uploadsPath = form.data('uploads-path') || window.uploads_path || null;
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const maxFileSize = gon.max_file_size || 10;
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const formTextarea = form.find('.js-gfm-input');
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let handlePaste;
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let pasteText;
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let addFileToForm;
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let updateAttachingMessage;
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let isImage;
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let getFilename;
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let uploadFile;
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formTextarea.wrap('<div class="div-dropzone"></div>');
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formTextarea.on('paste', event => handlePaste(event));
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// Add dropzone area to the form.
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const $mdArea = formTextarea.closest('.md-area');
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form.setupMarkdownPreview();
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const $formDropzone = form.find('.div-dropzone');
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$formDropzone.parent().addClass('div-dropzone-wrapper');
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$formDropzone.append(divHover);
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$formDropzone.find('.div-dropzone-hover').append(iconPaperclip);
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if (!uploadsPath) {
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$formDropzone.addClass('js-invalid-dropzone');
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return null;
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}
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const dropzone = $formDropzone.dropzone({
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url: uploadsPath,
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dictDefaultMessage: '',
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clickable: true,
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paramName: 'file',
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maxFilesize: maxFileSize,
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uploadMultiple: false,
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headers: csrf.headers,
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previewContainer: false,
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processing: () => $('.div-dropzone-alert').alert('close'),
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dragover: () => {
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$mdArea.addClass('is-dropzone-hover');
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form.find('.div-dropzone-hover').css('opacity', 0.7);
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},
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dragleave: () => {
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$mdArea.removeClass('is-dropzone-hover');
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form.find('.div-dropzone-hover').css('opacity', 0);
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},
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drop: () => {
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$mdArea.removeClass('is-dropzone-hover');
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form.find('.div-dropzone-hover').css('opacity', 0);
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formTextarea.focus();
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},
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success(header, response) {
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const processingFileCount = this.getQueuedFiles().length + this.getUploadingFiles().length;
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const shouldPad = processingFileCount >= 1;
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pasteText(response.link.markdown, shouldPad);
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// Show 'Attach a file' link only when all files have been uploaded.
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if (!processingFileCount) $attachButton.removeClass('hide');
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addFileToForm(response.link.url);
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},
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error: (file, errorMessage = __('Attaching the file failed.'), xhr) => {
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// If 'error' event is fired by dropzone, the second parameter is error message.
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// If the 'errorMessage' parameter is empty, the default error message is set.
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// If the 'error' event is fired by backend (xhr) error response, the third parameter is
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// xhr object (xhr.responseText is error message).
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// On error we hide the 'Attach' and 'Cancel' buttons
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// and show an error.
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const message = getErrorMessage(errorMessage || xhr.responseText);
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$uploadingErrorContainer.removeClass('hide');
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$uploadingErrorMessage.html(message);
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$attachButton.addClass('hide');
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$cancelButton.addClass('hide');
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},
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totaluploadprogress(totalUploadProgress) {
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updateAttachingMessage(this.files, $attachingFileMessage);
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$uploadProgress.text(`${Math.round(totalUploadProgress)}%`);
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},
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sending: () => {
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// DOM elements already exist.
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// Instead of dynamically generating them,
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// we just either hide or show them.
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$attachButton.addClass('hide');
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$uploadingErrorContainer.addClass('hide');
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$uploadingProgressContainer.removeClass('hide');
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$cancelButton.removeClass('hide');
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},
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removedfile: () => {
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$attachButton.removeClass('hide');
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$cancelButton.addClass('hide');
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$uploadingProgressContainer.addClass('hide');
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$uploadingErrorContainer.addClass('hide');
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},
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queuecomplete: () => {
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$('.dz-preview').remove();
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$('.markdown-area').trigger('input');
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$uploadingProgressContainer.addClass('hide');
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$cancelButton.addClass('hide');
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},
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});
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const child = $(dropzone[0]).children('textarea');
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// removeAllFiles(true) stops uploading files (if any)
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// and remove them from dropzone files queue.
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$cancelButton.on('click', e => {
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e.preventDefault();
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e.stopPropagation();
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Dropzone.forElement($formDropzone.get(0)).removeAllFiles(true);
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});
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// If 'error' event is fired, we store a failed files,
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// clear dropzone files queue, change status of failed files to undefined,
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// and add that files to the dropzone files queue again.
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// addFile() adds file to dropzone files queue and upload it.
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$retryLink.on('click', e => {
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const dropzoneInstance = Dropzone.forElement(
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e.target.closest('.js-main-target-form').querySelector('.div-dropzone'),
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);
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const failedFiles = dropzoneInstance.files;
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e.preventDefault();
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// 'true' parameter of removeAllFiles() cancels
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// uploading of files that are being uploaded at the moment.
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dropzoneInstance.removeAllFiles(true);
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failedFiles.map(failedFile => {
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const file = failedFile;
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if (file.status === Dropzone.ERROR) {
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file.status = undefined;
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file.accepted = undefined;
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}
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return dropzoneInstance.addFile(file);
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});
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});
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// eslint-disable-next-line consistent-return
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handlePaste = event => {
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const pasteEvent = event.originalEvent;
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if (pasteEvent.clipboardData && pasteEvent.clipboardData.items) {
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const image = isImage(pasteEvent);
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if (image) {
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event.preventDefault();
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const filename = getFilename(pasteEvent) || 'image.png';
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const text = `{{${filename}}}`;
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pasteText(text);
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return uploadFile(image.getAsFile(), filename);
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}
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}
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};
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isImage = data => {
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let i = 0;
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while (i < data.clipboardData.items.length) {
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const item = data.clipboardData.items[i];
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if (item.type.indexOf('image') !== -1) {
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return item;
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}
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i += 1;
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}
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return false;
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};
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pasteText = (text, shouldPad) => {
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let formattedText = text;
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if (shouldPad) {
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formattedText += '\n\n';
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}
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const textarea = child.get(0);
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const caretStart = textarea.selectionStart;
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const caretEnd = textarea.selectionEnd;
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const textEnd = $(child).val().length;
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const beforeSelection = $(child)
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.val()
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.substring(0, caretStart);
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const afterSelection = $(child)
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.val()
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.substring(caretEnd, textEnd);
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$(child).val(beforeSelection + formattedText + afterSelection);
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textarea.setSelectionRange(caretStart + formattedText.length, caretEnd + formattedText.length);
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textarea.style.height = `${textarea.scrollHeight}px`;
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formTextarea.get(0).dispatchEvent(new Event('input'));
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return formTextarea.trigger('input');
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};
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addFileToForm = path => {
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$(form).append(`<input type="hidden" name="files[]" value="${_.escape(path)}">`);
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};
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getFilename = e => {
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let value;
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if (window.clipboardData && window.clipboardData.getData) {
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value = window.clipboardData.getData('Text');
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} else if (e.clipboardData && e.clipboardData.getData) {
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value = e.clipboardData.getData('text/plain');
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}
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value = value.split('\r');
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return value[0];
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};
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const showSpinner = () => $uploadingProgressContainer.removeClass('hide');
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const closeSpinner = () => $uploadingProgressContainer.addClass('hide');
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const showError = message => {
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$uploadingErrorContainer.removeClass('hide');
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$uploadingErrorMessage.html(message);
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};
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const closeAlertMessage = () => form.find('.div-dropzone-alert').alert('close');
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const insertToTextArea = (filename, url) => {
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const $child = $(child);
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$child.val((index, val) => val.replace(`{{${filename}}}`, url));
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$child.trigger('change');
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};
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uploadFile = (item, filename) => {
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const formData = new FormData();
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formData.append('file', item, filename);
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showSpinner();
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closeAlertMessage();
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axios
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.post(uploadsPath, formData)
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.then(({ data }) => {
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const md = data.link.markdown;
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insertToTextArea(filename, md);
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closeSpinner();
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})
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.catch(e => {
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showError(e.response.data.message);
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closeSpinner();
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});
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};
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updateAttachingMessage = (files, messageContainer) => {
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const filesCount = files.filter(file => file.status === 'uploading' || file.status === 'queued')
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.length;
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const attachingMessage = n__('Attaching a file', 'Attaching %d files', filesCount);
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messageContainer.text(`${attachingMessage} -`);
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};
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form.find('.markdown-selector').click(function onMarkdownClick(e) {
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e.preventDefault();
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$(this)
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.closest('.gfm-form')
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.find('.div-dropzone')
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.click();
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formTextarea.focus();
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});
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return Dropzone.forElement($formDropzone.get(0));
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}
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