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'use strict'
const models = require('../../models')
const logger = require('../../logger')
const config = require('../../config')
const errors = require('../../errors')
const fs = require('fs')
const shortId = require('shortid')
const markdownpdf = require('markdown-pdf')
const moment = require('moment')
const querystring = require('querystring')
const noteUtil = require('./util')
exports.doAction = function (req, res, next) {
const noteId = req.params.noteId
noteUtil.findNote(req, res, function (note) {
const action = req.params.action
switch (action) {
case 'publish':
case 'pretty': // pretty deprecated
actionPublish(req, res, note)
break
case 'slide':
actionSlide(req, res, note)
break
case 'download':
exports.actionDownload(req, res, note)
break
case 'info':
actionInfo(req, res, note)
break
case 'pdf':
if (config.allowPDFExport) {
actionPDF(req, res, note)
} else {
logger.error('PDF export failed: Disabled by config. Set "allowPDFExport: true" to enable. Check the documentation for details')
errors.errorForbidden(res)
}
break
case 'gist':
actionGist(req, res, note)
break
case 'revision':
actionRevision(req, res, note)
break
default:
return res.redirect(config.serverURL + '/' + noteId)
}
})
}
function actionPublish (req, res, note) {
res.redirect(config.serverURL + '/s/' + (note.alias || note.shortid))
}
function actionSlide (req, res, note) {
res.redirect(config.serverURL + '/p/' + (note.alias || note.shortid))
}
exports.actionDownload = function (req, res, note) {
const body = note.content
let filename = models.Note.decodeTitle(note.title)
filename = encodeURIComponent(filename)
res.set({
'Access-Control-Allow-Origin': '*', // allow CORS as API
'Access-Control-Allow-Headers': 'Range',
'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
'Content-Type': 'text/markdown; charset=UTF-8',
'Cache-Control': 'private',
'Content-disposition': 'attachment; filename=' + filename + '.md',
'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
})
res.send(body)
}
function actionInfo (req, res, note) {
const body = note.content
const extracted = models.Note.extractMeta(body)
const markdown = extracted.markdown
const meta = models.Note.parseMeta(extracted.meta)
const createtime = note.createdAt
const updatetime = note.lastchangeAt
const title = models.Note.decodeTitle(note.title)
const data = {
title: meta.title || title,
description: meta.description || (markdown ? models.Note.generateDescription(markdown) : null),
viewcount: note.viewcount,
createtime: createtime,
updatetime: updatetime
}
res.set({
'Access-Control-Allow-Origin': '*', // allow CORS as API
'Access-Control-Allow-Headers': 'Range',
'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
'Cache-Control': 'private', // only cache by client
'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
})
res.send(data)
}
function actionPDF (req, res, note) {
const url = config.serverURL || 'http://' + req.get('host')
const body = note.content
const extracted = models.Note.extractMeta(body)
let content = extracted.markdown
const title = models.Note.decodeTitle(note.title)
if (!fs.existsSync(config.tmpPath)) {
fs.mkdirSync(config.tmpPath)
}
const path = config.tmpPath + '/' + Date.now() + '.pdf'
content = content.replace(/\]\(\//g, '](' + url + '/')
markdownpdf().from.string(content).to(path, function () {
if (!fs.existsSync(path)) {
logger.error('PDF seems to not be generated as expected. File doesn\'t exist: ' + path)
return errors.errorInternalError(res)
}
const stream = fs.createReadStream(path)
let 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')
res.setHeader('X-Robots-Tag', 'noindex, nofollow') // prevent crawling
stream.pipe(res)
fs.unlinkSync(path)
})
}
function actionGist (req, res, note) {
const data = {
client_id: config.github.clientID,
redirect_uri: config.serverURL + '/auth/github/callback/' + models.Note.encodeNoteId(note.id) + '/gist',
scope: 'gist',
state: shortId.generate()
}
const query = querystring.stringify(data)
res.redirect('https://github.com/login/oauth/authorize?' + query)
}
function actionRevision (req, res, note) {
const actionId = req.params.actionId
if (actionId) {
const time = moment(parseInt(actionId))
if (time.isValid()) {
models.Revision.getPatchedNoteRevisionByTime(note, time, function (err, content) {
if (err) {
logger.error(err)
return errors.errorInternalError(res)
}
if (!content) {
return errors.errorNotFound(res)
}
res.set({
'Access-Control-Allow-Origin': '*', // allow CORS as API
'Access-Control-Allow-Headers': 'Range',
'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
'Cache-Control': 'private', // only cache by client
'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
})
res.send(content)
})
} else {
return errors.errorNotFound(res)
}
} else {
models.Revision.getNoteRevisions(note, function (err, data) {
if (err) {
logger.error(err)
return errors.errorInternalError(res)
}
const out = {
revision: data
}
res.set({
'Access-Control-Allow-Origin': '*', // allow CORS as API
'Access-Control-Allow-Headers': 'Range',
'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
'Cache-Control': 'private', // only cache by client
'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
})
res.send(out)
})
}
}
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