64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
import Component from '@ember/component';
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import filesize from 'filesize';
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/**
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* @module FileToArrayBuffer
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* `FileToArrayBuffer` is a component that will allow you to pick a file from the local file system. Once
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* loaded, this file will be emitted as a JS ArrayBuffer to the passed `onChange` callback.
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*
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* @example
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* ```js
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* <FileToArrayBuffer @onChange={{action (mut file)}} />
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* ```
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* @param onChange=null {Function} - The function to call when the file read is complete. This function
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* receives the file as a JS ArrayBuffer
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* @param [label=null {String}] - Text to use as the label for the file input
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* @param [fileHelpText=null {String} - Text to use as help under the file input
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*
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*/
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export default Component.extend({
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classNames: ['box', 'is-fullwidth', 'is-marginless', 'is-shadowless'],
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onChange: () => {},
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label: null,
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fileHelpText: null,
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file: null,
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fileName: null,
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fileSize: null,
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fileLastModified: null,
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readFile(file) {
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const reader = new FileReader();
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// raft-snapshot-restore test was failing on CI trying to send action on destroyed object
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// ensure that the component has not been torn down prior to sending onChange action
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if (!this.isDestroyed && !this.isDestroying) {
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reader.onload = () => this.send('onChange', reader.result, file);
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}
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reader.readAsArrayBuffer(file);
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},
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actions: {
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pickedFile(e) {
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const { files } = e.target;
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if (!files.length) {
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return;
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}
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for (let i = 0, len = files.length; i < len; i++) {
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this.readFile(files[i]);
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}
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},
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clearFile() {
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this.send('onChange');
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},
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onChange(fileAsBytes, fileMeta) {
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const { name, size, lastModifiedDate } = fileMeta || {};
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const fileSize = size ? filesize(size) : null;
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this.set('file', fileAsBytes);
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this.set('fileName', name);
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this.set('fileSize', fileSize);
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this.set('fileLastModified', lastModifiedDate);
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this.onChange(fileAsBytes, name);
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},
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},
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});
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