jiapengyu
80 lines
1.7 KiB
JavaScript
80 lines
1.7 KiB
JavaScript
import { Transform } from "readable-stream";
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import crc32 from "buffer-crc32";
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import { collectStream } from "../utils.js";
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/**
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* JSON Format Plugin
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*
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* @module plugins/json
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* @license [MIT]{@link https://github.com/archiverjs/node-archiver/blob/master/LICENSE}
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* @copyright (c) 2012-2014 Chris Talkington, contributors.
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*/
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export default class Json extends Transform {
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/**
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* @constructor
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* @param {(JsonOptions|TransformOptions)} options
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*/
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constructor(options) {
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super({ ...options });
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this.files = [];
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}
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/**
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* [_transform description]
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*
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* @private
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* @param {Buffer} chunk
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* @param {String} encoding
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* @param {Function} callback
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* @return void
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*/
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_transform(chunk, encoding, callback) {
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callback(null, chunk);
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}
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/**
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* [_writeStringified description]
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*
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* @private
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* @return void
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*/
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_writeStringified() {
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var fileString = JSON.stringify(this.files);
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this.write(fileString);
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}
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/**
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* [append description]
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*
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* @param {(Buffer|Stream)} source
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* @param {EntryData} data
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* @param {Function} callback
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* @return void
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*/
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append(source, data, callback) {
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var self = this;
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data.crc32 = 0;
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function onend(err, sourceBuffer) {
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if (err) {
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callback(err);
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return;
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}
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data.size = sourceBuffer.length || 0;
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data.crc32 = crc32.unsigned(sourceBuffer);
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self.files.push(data);
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callback(null, data);
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}
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if (data.sourceType === "buffer") {
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onend(null, source);
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} else if (data.sourceType === "stream") {
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collectStream(source, onend);
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}
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}
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/**
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* [finalize description]
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*
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* @return void
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*/
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finalize() {
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this._writeStringified();
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this.end();
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}
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}
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