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'use strict'
const path = require('path')
const Promise = require('bluebird')
const fs = Promise.promisifyAll(require('fs-extra'))
const request = require('request')
const url = require('url')
const crypto = require('crypto')
const _ = require('lodash')
var regFolderName = new RegExp('^[a-z0-9][a-z0-9-]*[a-z0-9]$')
const maxDownloadFileSize = 3145728 // 3 MB
/**
* Uploads
*/
module.exports = {
_uploadsPath: './repo/uploads',
_uploadsThumbsPath: './data/thumbs',
/**
* Initialize Local Data Storage model
*
* @return {Object} Uploads model instance
*/
init () {
this._uploadsPath = path.resolve(ROOTPATH, appconfig.paths.repo, 'uploads')
this._uploadsThumbsPath = path.resolve(ROOTPATH, appconfig.paths.data, 'thumbs')
return this
},
/**
* Gets the thumbnails folder path.
*
* @return {String} The thumbs path.
*/
getThumbsPath () {
return this._uploadsThumbsPath
},
/**
* Gets the uploads folders.
*
* @return {Array<String>} The uploads folders.
*/
getUploadsFolders () {
return db.UplFolder.find({}, 'name').sort('name').exec().then((results) => {
return (results) ? _.map(results, 'name') : [{ name: '' }]
})
},
/**
* Creates an uploads folder.
*
* @param {String} folderName The folder name
* @return {Promise} Promise of the operation
*/
createUploadsFolder (folderName) {
let self = this
folderName = _.kebabCase(_.trim(folderName))
if (_.isEmpty(folderName) || !regFolderName.test(folderName)) {
return Promise.resolve(self.getUploadsFolders())
}
return fs.ensureDirAsync(path.join(self._uploadsPath, folderName)).then(() => {
return db.UplFolder.findOneAndUpdate({
_id: 'f:' + folderName
}, {
name: folderName
}, {
upsert: true
})
}).then(() => {
return self.getUploadsFolders()
})
},
/**
* Check if folder is valid and exists
*
* @param {String} folderName The folder name
* @return {Boolean} True if valid
*/
validateUploadsFolder (folderName) {
return db.UplFolder.findOne({ name: folderName }).then((f) => {
return (f) ? path.resolve(this._uploadsPath, folderName) : false
})
},
/**
* Adds one or more uploads files.
*
* @param {Array<Object>} arrFiles The uploads files
* @return {Void} Void
*/
addUploadsFiles (arrFiles) {
if (_.isArray(arrFiles) || _.isPlainObject(arrFiles)) {
// this._uploadsDb.Files.insert(arrFiles);
}
},
/**
* Gets the uploads files.
*
* @param {String} cat Category type
* @param {String} fld Folder
* @return {Array<Object>} The files matching the query
*/
getUploadsFiles (cat, fld) {
return db.UplFile.find({
category: cat,
folder: 'f:' + fld
}).sort('filename').exec()
},
/**
* Deletes an uploads file.
*
* @param {string} uid The file unique ID
* @return {Promise} Promise of the operation
*/
deleteUploadsFile (uid) {
let self = this
return db.UplFile.findOneAndRemove({ _id: uid }).then((f) => {
if (f) {
return self.deleteUploadsFileTry(f, 0)
}
return true
})
},
deleteUploadsFileTry (f, attempt) {
let self = this
let fFolder = (f.folder && f.folder !== 'f:') ? f.folder.slice(2) : './'
return Promise.join(
fs.removeAsync(path.join(self._uploadsThumbsPath, f._id + '.png')),
fs.removeAsync(path.resolve(self._uploadsPath, fFolder, f.filename))
).catch((err) => {
if (err.code === 'EBUSY' && attempt < 5) {
return Promise.delay(100).then(() => {
return self.deleteUploadsFileTry(f, attempt + 1)
})
} else {
winston.warn('Unable to delete uploads file ' + f.filename + '. File is locked by another process and multiple attempts failed.')
return true
}
})
},
/**
* Downloads a file from url.
*
* @param {String} fFolder The folder
* @param {String} fUrl The full URL
* @return {Promise} Promise of the operation
*/
downloadFromUrl (fFolder, fUrl) {
let fUrlObj = url.parse(fUrl)
let fUrlFilename = _.last(_.split(fUrlObj.pathname, '/'))
let destFolder = _.chain(fFolder).trim().toLower().value()
return upl.validateUploadsFolder(destFolder).then((destFolderPath) => {
if (!destFolderPath) {
return Promise.reject(new Error('Invalid Folder'))
}
return lcdata.validateUploadsFilename(fUrlFilename, destFolder).then((destFilename) => {
let destFilePath = path.resolve(destFolderPath, destFilename)
return new Promise((resolve, reject) => {
let rq = request({
url: fUrl,
method: 'GET',
followRedirect: true,
maxRedirects: 5,
timeout: 10000
})
let destFileStream = fs.createWriteStream(destFilePath)
let curFileSize = 0
rq.on('data', (data) => {
curFileSize += data.length
if (curFileSize > maxDownloadFileSize) {
rq.abort()
destFileStream.destroy()
fs.remove(destFilePath)
reject(new Error('Remote file is too large!'))
}
}).on('error', (err) => {
destFileStream.destroy()
fs.remove(destFilePath)
reject(err)
})
destFileStream.on('finish', () => {
resolve(true)
})
rq.pipe(destFileStream)
})
})
})
},
/**
* Move/Rename a file
*
* @param {String} uid The file ID
* @param {String} fld The destination folder
* @param {String} nFilename The new filename (optional)
* @return {Promise} Promise of the operation
*/
moveUploadsFile (uid, fld, nFilename) {
let self = this
return db.UplFolder.findById('f:' + fld).then((folder) => {
if (folder) {
return db.UplFile.findById(uid).then((originFile) => {
// -> Check if rename is valid
let nameCheck = null
if (nFilename) {
let originFileObj = path.parse(originFile.filename)
nameCheck = lcdata.validateUploadsFilename(nFilename + originFileObj.ext, folder.name)
} else {
nameCheck = Promise.resolve(originFile.filename)
}
return nameCheck.then((destFilename) => {
let originFolder = (originFile.folder && originFile.folder !== 'f:') ? originFile.folder.slice(2) : './'
let sourceFilePath = path.resolve(self._uploadsPath, originFolder, originFile.filename)
let destFilePath = path.resolve(self._uploadsPath, folder.name, destFilename)
let preMoveOps = []
// -> Check for invalid operations
if (sourceFilePath === destFilePath) {
return Promise.reject(new Error('Invalid Operation!'))
}
// -> Delete DB entry
preMoveOps.push(db.UplFile.findByIdAndRemove(uid))
// -> Move thumbnail ahead to avoid re-generation
if (originFile.category === 'image') {
let fUid = crypto.createHash('md5').update(folder.name + '/' + destFilename).digest('hex')
let sourceThumbPath = path.resolve(self._uploadsThumbsPath, originFile._id + '.png')
let destThumbPath = path.resolve(self._uploadsThumbsPath, fUid + '.png')
preMoveOps.push(fs.moveAsync(sourceThumbPath, destThumbPath))
} else {
preMoveOps.push(Promise.resolve(true))
}
// -> Proceed to move actual file
return Promise.all(preMoveOps).then(() => {
return fs.moveAsync(sourceFilePath, destFilePath, {
clobber: false
})
})
})
})
} else {
return Promise.reject(new Error('Invalid Destination Folder'))
}
})
}
}