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- {"version":3,"sources":["combined_stream.js"],"names":[],"mappings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file":"index.js","sourcesContent":["var util = require('util');\nvar Stream = require('stream').Stream;\nvar DelayedStream = require('delayed-stream');\n\nmodule.exports = CombinedStream;\nfunction CombinedStream() {\n this.writable = false;\n this.readable = true;\n this.dataSize = 0;\n this.maxDataSize = 2 * 1024 * 1024;\n this.pauseStreams = true;\n\n this._released = false;\n this._streams = [];\n this._currentStream = null;\n this._insideLoop = false;\n this._pendingNext = false;\n}\nutil.inherits(CombinedStream, Stream);\n\nCombinedStream.create = function(options) {\n var combinedStream = new this();\n\n options = options || {};\n for (var option in options) {\n combinedStream[option] = options[option];\n }\n\n return combinedStream;\n};\n\nCombinedStream.isStreamLike = function(stream) {\n return (typeof stream !== 'function')\n && (typeof stream !== 'string')\n && (typeof stream !== 'boolean')\n && (typeof stream !== 'number')\n && (!Buffer.isBuffer(stream));\n};\n\nCombinedStream.prototype.append = function(stream) {\n var isStreamLike = CombinedStream.isStreamLike(stream);\n\n if (isStreamLike) {\n if (!(stream instanceof DelayedStream)) {\n var newStream = DelayedStream.create(stream, {\n maxDataSize: Infinity,\n pauseStream: this.pauseStreams,\n });\n stream.on('data', this._checkDataSize.bind(this));\n stream = newStream;\n }\n\n this._handleErrors(stream);\n\n if (this.pauseStreams) {\n stream.pause();\n }\n }\n\n this._streams.push(stream);\n return this;\n};\n\nCombinedStream.prototype.pipe = function(dest, options) {\n Stream.prototype.pipe.call(this, dest, options);\n this.resume();\n return dest;\n};\n\nCombinedStream.prototype._getNext = function() {\n this._currentStream = null;\n\n if (this._insideLoop) {\n this._pendingNext = true;\n return; // defer call\n }\n\n this._insideLoop = true;\n try {\n do {\n this._pendingNext = false;\n this._realGetNext();\n } while (this._pendingNext);\n } finally {\n this._insideLoop = false;\n }\n};\n\nCombinedStream.prototype._realGetNext = function() {\n var stream = this._streams.shift();\n\n\n if (typeof stream == 'undefined') {\n this.end();\n return;\n }\n\n if (typeof stream !== 'function') {\n this._pipeNext(stream);\n return;\n }\n\n var getStream = stream;\n getStream(function(stream) {\n var isStreamLike = CombinedStream.isStreamLike(stream);\n if (isStreamLike) {\n stream.on('data', this._checkDataSize.bind(this));\n this._handleErrors(stream);\n }\n\n this._pipeNext(stream);\n }.bind(this));\n};\n\nCombinedStream.prototype._pipeNext = function(stream) {\n this._currentStream = stream;\n\n var isStreamLike = CombinedStream.isStreamLike(stream);\n if (isStreamLike) {\n stream.on('end', this._getNext.bind(this));\n stream.pipe(this, {end: false});\n return;\n }\n\n var value = stream;\n this.write(value);\n this._getNext();\n};\n\nCombinedStream.prototype._handleErrors = function(stream) {\n var self = this;\n stream.on('error', function(err) {\n self._emitError(err);\n });\n};\n\nCombinedStream.prototype.write = function(data) {\n this.emit('data', data);\n};\n\nCombinedStream.prototype.pause = function() {\n if (!this.pauseStreams) {\n return;\n }\n\n if(this.pauseStreams && this._currentStream && typeof(this._currentStream.pause) == 'function') this._currentStream.pause();\n this.emit('pause');\n};\n\nCombinedStream.prototype.resume = function() {\n if (!this._released) {\n this._released = true;\n this.writable = true;\n this._getNext();\n }\n\n if(this.pauseStreams && this._currentStream && typeof(this._currentStream.resume) == 'function') this._currentStream.resume();\n this.emit('resume');\n};\n\nCombinedStream.prototype.end = function() {\n this._reset();\n this.emit('end');\n};\n\nCombinedStream.prototype.destroy = function() {\n this._reset();\n this.emit('close');\n};\n\nCombinedStream.prototype._reset = function() {\n this.writable = false;\n this._streams = [];\n this._currentStream = null;\n};\n\nCombinedStream.prototype._checkDataSize = function() {\n this._updateDataSize();\n if (this.dataSize <= this.maxDataSize) {\n return;\n }\n\n var message =\n 'DelayedStream#maxDataSize of ' + this.maxDataSize + ' bytes exceeded.';\n this._emitError(new Error(message));\n};\n\nCombinedStream.prototype._updateDataSize = function() {\n this.dataSize = 0;\n\n var self = this;\n this._streams.forEach(function(stream) {\n if (!stream.dataSize) {\n return;\n }\n\n self.dataSize += stream.dataSize;\n });\n\n if (this._currentStream && this._currentStream.dataSize) {\n this.dataSize += this._currentStream.dataSize;\n }\n};\n\nCombinedStream.prototype._emitError = function(err) {\n this._reset();\n this.emit('error', err);\n};\n"]}
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