83 lines
1.7 KiB
JavaScript
83 lines
1.7 KiB
JavaScript
/* eslint-disable no-underscore-dangle */
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'use strict';
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const crypto = require('crypto');
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const { EventEmitter } = require('events');
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class VolatileFile extends EventEmitter {
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constructor({ filepath, newFilename, originalFilename, mimetype, hashAlgorithm, createFileWriteStream }) {
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super();
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this.lastModifiedDate = null;
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Object.assign(this, { filepath, newFilename, originalFilename, mimetype, hashAlgorithm, createFileWriteStream });
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this.size = 0;
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this._writeStream = null;
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if (typeof this.hashAlgorithm === 'string') {
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this.hash = crypto.createHash(this.hashAlgorithm);
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} else {
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this.hash = null;
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}
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}
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open() {
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this._writeStream = this.createFileWriteStream(this);
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this._writeStream.on('error', (err) => {
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this.emit('error', err);
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});
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}
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destroy() {
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this._writeStream.destroy();
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}
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toJSON() {
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const json = {
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size: this.size,
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newFilename: this.newFilename,
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length: this.length,
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originalFilename: this.originalFilename,
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mimetype: this.mimetype,
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};
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if (this.hash && this.hash !== '') {
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json.hash = this.hash;
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}
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return json;
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}
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toString() {
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return `VolatileFile: ${this.originalFilename}`;
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}
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write(buffer, cb) {
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if (this.hash) {
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this.hash.update(buffer);
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}
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if (this._writeStream.closed || this._writeStream.destroyed) {
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cb();
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return;
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}
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this._writeStream.write(buffer, () => {
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this.size += buffer.length;
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this.emit('progress', this.size);
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cb();
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});
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}
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end(cb) {
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if (this.hash) {
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this.hash = this.hash.digest('hex');
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}
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this._writeStream.end(() => {
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this.emit('end');
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cb();
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});
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}
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}
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module.exports = VolatileFile;
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