73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
import JSZip from 'jszip';
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import JSZipUtils from 'jszip-utils';
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export default class SketchLoader {
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constructor(container) {
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this.container = container;
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this.loadingIcon = this.container.querySelector('.js-loading-icon');
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this.load();
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}
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load() {
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return this.getZipFile()
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.then(data => JSZip.loadAsync(data))
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.then(asyncResult => asyncResult.files['previews/preview.png'].async('uint8array'))
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.then((content) => {
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const url = window.URL || window.webkitURL;
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const blob = new Blob([new Uint8Array(content)], {
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type: 'image/png',
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});
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const previewUrl = url.createObjectURL(blob);
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this.render(previewUrl);
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})
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.catch(this.error.bind(this));
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}
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getZipFile() {
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return new JSZip.external.Promise((resolve, reject) => {
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JSZipUtils.getBinaryContent(this.container.dataset.endpoint, (err, data) => {
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if (err) {
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reject(err);
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} else {
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resolve(data);
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}
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});
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});
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}
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render(previewUrl) {
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const previewLink = document.createElement('a');
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const previewImage = document.createElement('img');
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previewLink.href = previewUrl;
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previewLink.target = '_blank';
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previewImage.src = previewUrl;
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previewImage.className = 'img-responsive';
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previewLink.appendChild(previewImage);
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this.container.appendChild(previewLink);
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this.removeLoadingIcon();
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}
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error() {
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const errorMsg = document.createElement('p');
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errorMsg.className = 'prepend-top-default append-bottom-default text-center';
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errorMsg.textContent = `
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Cannot show preview. For previews on sketch files, they must have the file format
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introduced by Sketch version 43 and above.
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`;
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this.container.appendChild(errorMsg);
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this.removeLoadingIcon();
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}
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removeLoadingIcon() {
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if (this.loadingIcon) {
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this.loadingIcon.remove();
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}
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}
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}
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