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