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created a folder structure in node
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/**
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* Controls the communication with the Abiword application
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*/
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/*
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* 2011 Peter 'Pita' Martischka
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS-IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var util = require('util');
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var spawn = require('child_process').spawn;
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var async = require("async");
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var settings = require("./settings");
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//Queue with the converts we have to do
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var queue = async.queue(doConvertTask, 1);
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//spawn the abiword process
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var abiword = spawn(settings.abiword, ["--plugin", "AbiCommand"]);
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//append error messages to the buffer
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abiword.stderr.on('data', function (data)
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{
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stdoutBuffer += data.toString();
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});
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//throw exceptions if abiword is dieing
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abiword.on('exit', function (code)
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{
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throw "Abiword died with exit code " + code;
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});
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//delegate the processing of stdout to a other function
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abiword.stdout.on('data',onAbiwordStdout);
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var stdoutCallback = null;
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var stdoutBuffer = "";
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var firstPrompt = true;
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function onAbiwordStdout(data)
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{
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//add data to buffer
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stdoutBuffer+=data.toString();
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//we're searching for the prompt, cause this means everything we need is in the buffer
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if(stdoutBuffer.search("AbiWord:>") != -1)
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{
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//filter the feedback message
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var err = stdoutBuffer.search("OK") != -1 ? null : stdoutBuffer;
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//reset the buffer
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stdoutBuffer = "";
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//call the callback with the error message
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//skip the first prompt
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if(stdoutCallback != null && !firstPrompt)
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{
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stdoutCallback(err);
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stdoutCallback = null;
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}
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firstPrompt = false;
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}
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}
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function doConvertTask(task, callback)
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{
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abiword.stdin.write("convert " + task.srcFile + " " + task.destFile + " " + task.type + "\n");
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//create a callback that calls the task callback and the caller callback
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stdoutCallback = function (err)
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{
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callback();
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task.callback(err);
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};
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}
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exports.convertFile = function(srcFile, destFile, type, callback)
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{
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queue.push({"srcFile": srcFile, "destFile": destFile, "type": type, "callback": callback});
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};
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