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/**
* Handles the import requests
*/
/*
* 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var ERR = require("async-stacktrace");
var padManager = require("../db/PadManager");
var padMessageHandler = require("./PadMessageHandler");
var async = require("async");
var fs = require("fs");
var settings = require('../utils/Settings');
var formidable = require('formidable');
var os = require("os");
//load abiword only if its enabled
if(settings.abiword != null)
var abiword = require("../utils/Abiword");
var tempDirectory = "/tmp/";
//tempDirectory changes if the operating system is windows
if(os.type().indexOf("Windows") > -1)
{
tempDirectory = process.env.TEMP;
}
/**
* do a requested import
*/
exports.doImport = function(req, res, padId)
{
//pipe to a file
//convert file to text via abiword
//set text in the pad
var srcFile, destFile;
var pad;
var text;
async.series([
//save the uploaded file to /tmp
function(callback)
{
var form = new formidable.IncomingForm();
form.keepExtensions = true;
form.uploadDir = tempDirectory;
form.parse(req, function(err, fields, files)
{
//the upload failed, stop at this point
if(err || files.file === undefined)
{
console.warn("Uploading Error: " + err.stack);
callback("uploadFailed");
}
//everything ok, continue
else
{
//save the path of the uploaded file
srcFile = files.file.path;
callback();
}
});
},
//ensure this is a file ending we know, else we change the file ending to .txt
//this allows us to accept source code files like .c or .java
function(callback)
{
var fileEnding = (srcFile.split(".")[1] || "").toLowerCase();
var knownFileEndings = ["txt", "doc", "docx", "pdf", "odt", "html", "htm"];
//find out if this is a known file ending
var fileEndingKnown = false;
for(var i in knownFileEndings)
{
if(fileEnding == knownFileEndings[i])
{
fileEndingKnown = true;
}
}
//if the file ending is known, continue as normal
if(fileEndingKnown)
{
callback();
}
//we need to rename this file with a .txt ending
else
{
var oldSrcFile = srcFile;
srcFile = srcFile.split(".")[0] + ".txt";
fs.rename(oldSrcFile, srcFile, callback);
}
},
//convert file to text
function(callback)
{
var randNum = Math.floor(Math.random()*0xFFFFFFFF);
destFile = tempDirectory + "eplite_import_" + randNum + ".txt";
abiword.convertFile(srcFile, destFile, "txt", function(err){
//catch convert errors
if(err){
console.warn("Converting Error:", err);
return callback("convertFailed");
} else {
callback();
}
});
},
//get the pad object
function(callback)
{
padManager.getPad(padId, function(err, _pad)
{
if(ERR(err, callback)) return;
pad = _pad;
callback();
});
},
//read the text
function(callback)
{
fs.readFile(destFile, "utf8", function(err, _text)
{
if(ERR(err, callback)) return;
text = _text;
//node on windows has a delay on releasing of the file lock.
//We add a 100ms delay to work around this
if(os.type().indexOf("Windows") > -1)
{
setTimeout(function()
{
callback();
}, 100);
}
else
{
callback();
}
});
},
//change text of the pad and broadcast the changeset
function(callback)
{
pad.setText(text);
padMessageHandler.updatePadClients(pad, callback);
},
//clean up temporary files
function(callback)
{
async.parallel([
function(callback)
{
fs.unlink(srcFile, callback);
},
function(callback)
{
fs.unlink(destFile, callback);
}
], callback);
}
], function(err)
{
var status = "ok";
//check for known errors and replace the status
if(err == "uploadFailed" || err == "convertFailed")
{
status = err;
err = null;
}
ERR(err);
//close the connection
res.send("<script>document.domain = document.domain; var impexp = window.top.require('/pad_impexp').padimpexp.handleFrameCall('" + status + "'); </script>", 200);
});
}
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