146 lines
4.2 KiB
JavaScript
146 lines
4.2 KiB
JavaScript
// Docs: https://www.diagrams.net/doc/faq/embed-mode
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import * as store from './store';
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let iFrame = null;
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let lastApprovedOrigin;
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let onInit;
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let onSave;
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const saveBackupKey = 'last-drawing-save';
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function drawPostMessage(data) {
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iFrame.contentWindow.postMessage(JSON.stringify(data), lastApprovedOrigin);
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}
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function drawEventExport(message) {
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store.set(saveBackupKey, message.data);
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if (onSave) {
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onSave(message.data).then(() => {
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store.del(saveBackupKey);
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});
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}
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}
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function drawEventSave(message) {
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drawPostMessage({
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action: 'export', format: 'xmlpng', xml: message.xml, spin: 'Updating drawing',
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});
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}
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function drawEventInit() {
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if (!onInit) return;
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onInit().then(xml => {
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drawPostMessage({action: 'load', autosave: 1, xml});
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});
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}
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function drawEventConfigure() {
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const config = {};
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window.$events.emitPublic(iFrame, 'editor-drawio::configure', {config});
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drawPostMessage({action: 'configure', config});
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}
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function drawEventClose() {
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// eslint-disable-next-line no-use-before-define
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window.removeEventListener('message', drawReceive);
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if (iFrame) document.body.removeChild(iFrame);
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}
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/**
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* Receive and handle a message event from the draw.io window.
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* @param {MessageEvent} event
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*/
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function drawReceive(event) {
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if (!event.data || event.data.length < 1) return;
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if (event.origin !== lastApprovedOrigin) return;
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const message = JSON.parse(event.data);
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if (message.event === 'init') {
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drawEventInit();
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} else if (message.event === 'exit') {
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drawEventClose();
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} else if (message.event === 'save') {
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drawEventSave(message);
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} else if (message.event === 'export') {
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drawEventExport(message);
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} else if (message.event === 'configure') {
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drawEventConfigure();
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}
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}
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/**
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* Attempt to prompt and restore unsaved drawing content if existing.
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* @returns {Promise<void>}
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*/
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async function attemptRestoreIfExists() {
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const backupVal = await store.get(saveBackupKey);
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const dialogEl = document.getElementById('unsaved-drawing-dialog');
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if (!dialogEl) {
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console.error('Missing expected unsaved-drawing dialog');
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}
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if (backupVal) {
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/** @var {ConfirmDialog} */
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const dialog = window.$components.firstOnElement(dialogEl, 'confirm-dialog');
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const restore = await dialog.show();
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if (restore) {
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onInit = async () => backupVal;
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}
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}
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}
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/**
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* Show the draw.io editor.
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* onSaveCallback must return a promise that resolves on successful save and errors on failure.
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* onInitCallback must return a promise with the xml to load for the editor.
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* Will attempt to provide an option to restore unsaved changes if found to exist.
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* @param {String} drawioUrl
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* @param {Function<Promise<String>>} onInitCallback
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* @param {Function<Promise>} onSaveCallback - Is called with the drawing data on save.
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*/
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export async function show(drawioUrl, onInitCallback, onSaveCallback) {
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onInit = onInitCallback;
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onSave = onSaveCallback;
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await attemptRestoreIfExists();
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iFrame = document.createElement('iframe');
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iFrame.setAttribute('frameborder', '0');
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window.addEventListener('message', drawReceive);
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iFrame.setAttribute('src', drawioUrl);
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iFrame.setAttribute('class', 'fullscreen');
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iFrame.style.backgroundColor = '#FFFFFF';
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document.body.appendChild(iFrame);
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lastApprovedOrigin = (new URL(drawioUrl)).origin;
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}
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export async function upload(imageData, pageUploadedToId) {
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const data = {
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image: imageData,
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uploaded_to: pageUploadedToId,
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};
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const resp = await window.$http.post(window.baseUrl('/images/drawio'), data);
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return resp.data;
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}
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export function close() {
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drawEventClose();
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}
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/**
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* Load an existing image, by fetching it as Base64 from the system.
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* @param drawingId
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* @returns {Promise<string>}
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*/
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export async function load(drawingId) {
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try {
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const resp = await window.$http.get(window.baseUrl(`/images/drawio/base64/${drawingId}`));
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return `data:image/png;base64,${resp.data.content}`;
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} catch (error) {
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if (error instanceof window.$http.HttpError) {
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window.$events.showResponseError(error);
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}
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close();
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throw error;
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}
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}
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