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117 lines
2.7 KiB
117 lines
2.7 KiB
/**
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* node-compress-commons
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*
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* Copyright (c) 2014 Chris Talkington, contributors.
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* Licensed under the MIT license.
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* https://github.com/archiverjs/node-compress-commons/blob/master/LICENSE-MIT
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*/
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var inherits = require('util').inherits;
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var Transform = require('readable-stream').Transform;
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var ArchiveEntry = require('./archive-entry');
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var util = require('../util');
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var ArchiveOutputStream = module.exports = function(options) {
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if (!(this instanceof ArchiveOutputStream)) {
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return new ArchiveOutputStream(options);
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}
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Transform.call(this, options);
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this.offset = 0;
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this._archive = {
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finish: false,
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finished: false,
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processing: false
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};
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};
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inherits(ArchiveOutputStream, Transform);
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ArchiveOutputStream.prototype._appendBuffer = function(zae, source, callback) {
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// scaffold only
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};
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ArchiveOutputStream.prototype._appendStream = function(zae, source, callback) {
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// scaffold only
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};
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ArchiveOutputStream.prototype._emitErrorCallback = function(err) {
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if (err) {
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this.emit('error', err);
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}
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};
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ArchiveOutputStream.prototype._finish = function(ae) {
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// scaffold only
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};
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ArchiveOutputStream.prototype._normalizeEntry = function(ae) {
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// scaffold only
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};
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ArchiveOutputStream.prototype._transform = function(chunk, encoding, callback) {
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callback(null, chunk);
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};
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ArchiveOutputStream.prototype.entry = function(ae, source, callback) {
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source = source || null;
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if (typeof callback !== 'function') {
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callback = this._emitErrorCallback.bind(this);
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}
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if (!(ae instanceof ArchiveEntry)) {
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callback(new Error('not a valid instance of ArchiveEntry'));
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return;
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}
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if (this._archive.finish || this._archive.finished) {
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callback(new Error('unacceptable entry after finish'));
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return;
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}
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if (this._archive.processing) {
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callback(new Error('already processing an entry'));
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return;
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}
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this._archive.processing = true;
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this._normalizeEntry(ae);
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this._entry = ae;
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source = util.normalizeInputSource(source);
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if (Buffer.isBuffer(source)) {
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this._appendBuffer(ae, source, callback);
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} else if (util.isStream(source)) {
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this._appendStream(ae, source, callback);
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} else {
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this._archive.processing = false;
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callback(new Error('input source must be valid Stream or Buffer instance'));
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return;
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}
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return this;
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};
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ArchiveOutputStream.prototype.finish = function() {
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if (this._archive.processing) {
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this._archive.finish = true;
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return;
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}
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this._finish();
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};
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ArchiveOutputStream.prototype.getBytesWritten = function() {
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return this.offset;
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};
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ArchiveOutputStream.prototype.write = function(chunk, cb) {
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if (chunk) {
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this.offset += chunk.length;
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}
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return Transform.prototype.write.call(this, chunk, cb);
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}; |