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//response
//external modules
var ejs = require('ejs');
var fs = require('fs');
var path = require('path');
var uuid = require('node-uuid');
var markdownpdf = require("markdown-pdf");
var LZString = require('lz-string');
//core
var config = require("../config.js");
//others
var db = require("./db.js");
var Note = require("./note.js");
//public
var response = {
errorForbidden: function (res) {
res.status(403).send("Forbidden, oh no.")
},
errorNotFound: function (res) {
responseError(res, "404", "Not Found", "oops.")
},
errorInternalError: function (res) {
responseError(res, "500", "Internal Error", "wtf.")
},
errorServiceUnavailable: function (res) {
res.status(503).send("I'm busy right now, try again later.")
},
newNote: newNote,
showFeatures: showFeatures,
showNote: showNote,
noteActions: noteActions
};
function responseError(res, code, detail, msg) {
res.writeHead(code, {
'Content-Type': 'text/html'
});
var content = ejs.render(fs.readFileSync(config.errorpath, 'utf8'), {
cache: !config.debug,
filename: config.errorpath,
code: code,
detail: detail,
msg: msg
});
res.write(content);
res.end();
}
function responseHackMD(res) {
res.writeHead(200, {
'Content-Type': 'text/html'
});
var content = ejs.render(fs.readFileSync(config.hackmdpath, 'utf8'), {
cache: !config.debug,
filename: config.hackmdpath
});
res.write(content);
res.end();
}
function newNote(req, res, next) {
var newId = uuid.v4();
var body = fs.readFileSync(config.defaultnotepath, 'utf8');
body = LZString.compressToBase64(body);
var owner = null;
if (req.isAuthenticated()) {
owner = req.session.passport.user;
}
db.newToDB(newId, owner, body, function (err, result) {
if (err) {
responseError(res, "500", "Internal Error", "wtf.");
return;
}
res.redirect("/" + LZString.compressToBase64(newId));
});
}
function showFeatures(req, res, next) {
db.readFromDB(config.featuresnotename, function (err, data) {
if (err) {
var body = fs.readFileSync(config.defaultfeaturespath, 'utf8');
body = LZString.compressToBase64(body);
db.newToDB(config.featuresnotename, null, body, function (err, result) {
if (err) {
responseError(res, "500", "Internal Error", "wtf.");
return;
}
responseHackMD(res);
});
} else {
responseHackMD(res);
}
});
}
function showNote(req, res, next) {
var noteId = req.params.noteId;
if (!Note.checkNoteIdValid(noteId)) {
responseError(res, "404", "Not Found", "oops.");
return;
}
responseHackMD(res);
}
function actionPretty(req, res, noteId) {
db.readFromDB(noteId, function (err, data) {
if (err) {
responseError(res, "404", "Not Found", "oops.");
return;
}
var body = data.rows[0].content;
var template = config.prettypath;
var compiled = ejs.compile(fs.readFileSync(template, 'utf8'));
var origin = "//" + req.headers.host;
var html = compiled({
url: origin,
body: body
});
var buf = html;
res.writeHead(200, {
'Content-Type': 'text/html; charset=UTF-8',
'Cache-Control': 'private',
'Content-Length': buf.length
});
res.end(buf);
});
}
function actionDownload(req, res, noteId) {
db.readFromDB(noteId, function (err, data) {
if (err) {
responseError(res, "404", "Not Found", "oops.");
return;
}
var body = LZString.decompressFromBase64(data.rows[0].content);
var title = Note.getNoteTitle(body);
res.writeHead(200, {
'Content-Type': 'text/markdown; charset=UTF-8',
'Cache-Control': 'private',
'Content-disposition': 'attachment; filename=' + title + '.md',
'Content-Length': body.length
});
res.end(body);
});
}
function actionPDF(req, res, noteId) {
db.readFromDB(noteId, function (err, data) {
if (err) {
responseError(res, "404", "Not Found", "oops.");
return;
}
var body = LZString.decompressFromBase64(data.rows[0].content);
var title = Note.getNoteTitle(body);
if (!fs.existsSync(config.tmppath)) {
fs.mkdirSync(config.tmppath);
}
var path = config.tmppath + Date.now() + '.pdf';
markdownpdf().from.string(body).to(path, function () {
var stream = fs.createReadStream(path);
var filename = title;
// Be careful of special characters
filename = encodeURIComponent(filename);
// Ideally this should strip them
res.setHeader('Content-disposition', 'attachment; filename="' + filename + '.pdf"');
res.setHeader('Cache-Control', 'private');
res.setHeader('Content-Type', 'application/pdf; charset=UTF-8');
stream.pipe(res);
fs.unlink(path);
});
});
}
function noteActions(req, res, next) {
var noteId = req.params.noteId;
if (noteId != config.featuresnotename) {
if (!Note.checkNoteIdValid(noteId)) {
responseError(res, "404", "Not Found", "oops.");
return;
}
noteId = LZString.decompressFromBase64(noteId);
if (!noteId) {
responseError(res, "404", "Not Found", "oops.");
return;
}
}
var action = req.params.action;
switch (action) {
case "pretty":
actionPretty(req, res, noteId);
break;
case "download":
actionDownload(req, res, noteId);
break;
case "pdf":
actionPDF(req, res, noteId);
break;
default:
if (noteId != config.featuresnotename)
res.redirect('/' + LZString.compressToBase64(noteId));
else
res.redirect('/' + noteId);
break;
}
}
module.exports = response;
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