79 lines
1.9 KiB
JavaScript
79 lines
1.9 KiB
JavaScript
/**
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* Just a buffer really, but one that implements the Writable class
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* @type {Constuctor}
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*/
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var util = require('util');
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var MockWritableStream; // defined simply for 0.10+, in detail for older versions
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var Writable = require('stream').Writable;
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if (Writable) {
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// nice and simple for streams 2
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MockWritableStream = module.exports = function (opts) {
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Writable.call(this, opts);
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this._write = function (chunk, encoding, cb) {};
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};
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util.inherits(MockWritableStream, Writable);
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} else {
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// Node < 0.10 did not provide a usefull stream abstract
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var Stream = require('stream').Stream;
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module.exports = MockWritableStream = function (opts) {
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Stream.call(this);
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this.writable = true;
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};
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util.inherits(MockWritableStream, Stream);
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MockWritableStream.prototype.write = function (data) {
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if (!this.writable) {
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this.emit('error', new Error('stream not writable'));
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return false;
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}
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var cb;
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if (typeof(arguments[arguments.length - 1]) === 'function') {
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cb = arguments[arguments.length - 1];
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}
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if (cb) {
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process.nextTick(cb);
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}
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};
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MockWritableStream.prototype.end = function (data, encoding, cb) {
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if (typeof(data) === 'function') {
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cb = data;
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} else if (typeof(encoding) === 'function') {
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cb = encoding;
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this.write(data);
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} else if (arguments.length > 0) {
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this.write(data, encoding);
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}
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this.writable = false;
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};
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MockWritableStream.prototype.destroy = function (cb) {
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var self = this;
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if (!this.writable) {
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if (cb) {
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process.nextTick(function () { cb(null); });
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}
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return;
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}
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this.writable = false;
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process.nextTick(function () {
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if (cb) {
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cb(null);
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}
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self.emit('close');
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});
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};
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// There is no shutdown() for files.
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MockWritableStream.prototype.destroySoon = MockWritableStream.prototype.end;
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}
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