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/**
* Handles the export 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 exporthtml = require("../utils/ExportHtml");
var exporttxt = require("../utils/ExportTxt");
var exportdokuwiki = require("../utils/ExportDokuWiki");
var padManager = require("../db/PadManager");
var async = require("async");
var fs = require("fs");
var settings = require('../utils/Settings');
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 export
*/
exports.doExport = function(req, res, padId, type)
{
//tell the browser that this is a downloadable file
res.attachment(padId + "." + type);
//if this is a plain text export, we can do this directly
// We have to over engineer this because tabs are stored as attributes and not plain text
if(type == "txt")
{
var txt;
var randNum;
var srcFile, destFile;
async.series([
//render the txt document
function(callback)
{
exporttxt.getPadTXTDocument(padId, req.params.rev, false, function(err, _txt)
{
if(ERR(err, callback)) return;
txt = _txt;
callback();
});
},
//decide what to do with the txt export
function(callback)
{
//if this is a txt export, we can send this from here directly
res.send(txt);
callback("stop");
},
//send the convert job to abiword
function(callback)
{
//ensure html can be collected by the garbage collector
txt = null;
destFile = tempDirectory + "/eplite_export_" + randNum + "." + type;
abiword.convertFile(srcFile, destFile, type, callback);
},
//send the file
function(callback)
{
res.sendfile(destFile, null, callback);
},
//clean up temporary files
function(callback)
{
async.parallel([
function(callback)
{
fs.unlink(srcFile, callback);
},
function(callback)
{
//100ms delay to accomidate for slow windows fs
if(os.type().indexOf("Windows") > -1)
{
setTimeout(function()
{
fs.unlink(destFile, callback);
}, 100);
}
else
{
fs.unlink(destFile, callback);
}
}
], callback);
}
], function(err)
{
if(err && err != "stop") ERR(err);
})
}
else if(type == 'dokuwiki')
{
var randNum;
var srcFile, destFile;
async.series([
//render the dokuwiki document
function(callback)
{
exportdokuwiki.getPadDokuWikiDocument(padId, req.params.rev, function(err, dokuwiki)
{
res.send(dokuwiki);
callback("stop");
});
},
], function(err)
{
if(err && err != "stop") throw err;
});
}
else
{
var html;
var randNum;
var srcFile, destFile;
async.series([
//render the html document
function(callback)
{
exporthtml.getPadHTMLDocument(padId, req.params.rev, false, function(err, _html)
{
if(ERR(err, callback)) return;
html = _html;
callback();
});
},
//decide what to do with the html export
function(callback)
{
//if this is a html export, we can send this from here directly
if(type == "html")
{
res.send(html);
callback("stop");
}
else //write the html export to a file
{
randNum = Math.floor(Math.random()*0xFFFFFFFF);
srcFile = tempDirectory + "/eplite_export_" + randNum + ".html";
fs.writeFile(srcFile, html, callback);
}
},
//send the convert job to abiword
function(callback)
{
//ensure html can be collected by the garbage collector
html = null;
destFile = tempDirectory + "/eplite_export_" + randNum + "." + type;
abiword.convertFile(srcFile, destFile, type, callback);
},
//send the file
function(callback)
{
res.sendfile(destFile, null, callback);
},
//clean up temporary files
function(callback)
{
async.parallel([
function(callback)
{
fs.unlink(srcFile, callback);
},
function(callback)
{
//100ms delay to accomidate for slow windows fs
if(os.type().indexOf("Windows") > -1)
{
setTimeout(function()
{
fs.unlink(destFile, callback);
}, 100);
}
else
{
fs.unlink(destFile, callback);
}
}
], callback);
}
], function(err)
{
if(err && err != "stop") ERR(err);
})
}
};
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