wikijs-fork/libs/uploads-agent.js
2017-02-08 20:52:37 -05:00

256 lines
6.9 KiB
JavaScript

'use strict'
const path = require('path')
const Promise = require('bluebird')
const fs = Promise.promisifyAll(require('fs-extra'))
const readChunk = require('read-chunk')
const fileType = require('file-type')
const mime = require('mime-types')
const farmhash = require('farmhash')
const chokidar = require('chokidar')
const sharp = require('sharp')
const _ = require('lodash')
/**
* Uploads - Agent
*/
module.exports = {
_uploadsPath: './repo/uploads',
_uploadsThumbsPath: './data/thumbs',
_watcher: null,
/**
* Initialize Uploads model
*
* @return {Object} Uploads model instance
*/
init () {
let self = this
self._uploadsPath = path.resolve(ROOTPATH, appconfig.paths.repo, 'uploads')
self._uploadsThumbsPath = path.resolve(ROOTPATH, appconfig.paths.data, 'thumbs')
// Disable Sharp cache, as it cause file locks issues when deleting uploads.
sharp.cache(false)
return self
},
/**
* Watch the uploads folder for changes
*
* @return {Void} Void
*/
watch () {
let self = this
self._watcher = chokidar.watch(self._uploadsPath, {
persistent: true,
ignoreInitial: true,
cwd: self._uploadsPath,
depth: 1,
awaitWriteFinish: true
})
// -> Add new upload file
self._watcher.on('add', (p) => {
let pInfo = self.parseUploadsRelPath(p)
return self.processFile(pInfo.folder, pInfo.filename).then((mData) => {
return db.UplFile.findByIdAndUpdate(mData._id, mData, { upsert: true })
}).then(() => {
return git.commitUploads('Uploaded ' + p)
})
})
// -> Remove upload file
self._watcher.on('unlink', (p) => {
return git.commitUploads('Deleted/Renamed ' + p)
})
},
/**
* Initial Uploads scan
*
* @return {Promise<Void>} Promise of the scan operation
*/
initialScan () {
let self = this
return fs.readdirAsync(self._uploadsPath).then((ls) => {
// Get all folders
return Promise.map(ls, (f) => {
return fs.statAsync(path.join(self._uploadsPath, f)).then((s) => { return { filename: f, stat: s } })
}).filter((s) => { return s.stat.isDirectory() }).then((arrDirs) => {
let folderNames = _.map(arrDirs, 'filename')
folderNames.unshift('')
// Add folders to DB
return db.UplFolder.remove({}).then(() => {
return db.UplFolder.insertMany(_.map(folderNames, (f) => {
return {
_id: 'f:' + f,
name: f
}
}))
}).then(() => {
// Travel each directory and scan files
let allFiles = []
return Promise.map(folderNames, (fldName) => {
let fldPath = path.join(self._uploadsPath, fldName)
return fs.readdirAsync(fldPath).then((fList) => {
return Promise.map(fList, (f) => {
return upl.processFile(fldName, f).then((mData) => {
if (mData) {
allFiles.push(mData)
}
return true
})
}, {concurrency: 3})
})
}, {concurrency: 1}).finally(() => {
// Add files to DB
return db.UplFile.remove({}).then(() => {
if (_.isArray(allFiles) && allFiles.length > 0) {
return db.UplFile.insertMany(allFiles)
} else {
return true
}
})
})
})
})
}).then(() => {
// Watch for new changes
return upl.watch()
})
},
/**
* Parse relative Uploads path
*
* @param {String} f Relative Uploads path
* @return {Object} Parsed path (folder and filename)
*/
parseUploadsRelPath (f) {
let fObj = path.parse(f)
return {
folder: fObj.dir,
filename: fObj.base
}
},
/**
* Get metadata from file and generate thumbnails if necessary
*
* @param {String} fldName The folder name
* @param {String} f The filename
* @return {Promise<Object>} Promise of the file metadata
*/
processFile (fldName, f) {
let self = this
let fldPath = path.join(self._uploadsPath, fldName)
let fPath = path.join(fldPath, f)
let fPathObj = path.parse(fPath)
let fUid = farmhash.fingerprint32(fldName + '/' + f)
return fs.statAsync(fPath).then((s) => {
if (!s.isFile()) { return false }
// Get MIME info
let mimeInfo = fileType(readChunk.sync(fPath, 0, 262))
if (_.isNil(mimeInfo)) {
mimeInfo = {
mime: mime.lookup(fPathObj.ext) || 'application/octet-stream'
}
}
// Images
if (s.size < 3145728) { // ignore files larger than 3MB
if (_.includes(['image/png', 'image/jpeg', 'image/gif', 'image/webp'], mimeInfo.mime)) {
return self.getImageMetadata(fPath).then((mImgData) => {
let cacheThumbnailPath = path.parse(path.join(self._uploadsThumbsPath, fUid + '.png'))
let cacheThumbnailPathStr = path.format(cacheThumbnailPath)
let mData = {
_id: fUid,
category: 'image',
mime: mimeInfo.mime,
extra: _.pick(mImgData, ['format', 'width', 'height', 'density', 'hasAlpha', 'orientation']),
folder: 'f:' + fldName,
filename: f,
basename: fPathObj.name,
filesize: s.size
}
// Generate thumbnail
return fs.statAsync(cacheThumbnailPathStr).then((st) => {
return st.isFile()
}).catch((err) => { // eslint-disable-line handle-callback-err
return false
}).then((thumbExists) => {
return (thumbExists) ? mData : fs.ensureDirAsync(cacheThumbnailPath.dir).then(() => {
return self.generateThumbnail(fPath, cacheThumbnailPathStr)
}).return(mData)
})
})
}
}
// Other Files
return {
_id: fUid,
category: 'binary',
mime: mimeInfo.mime,
folder: 'f:' + fldName,
filename: f,
basename: fPathObj.name,
filesize: s.size
}
})
},
/**
* Generate thumbnail of image
*
* @param {String} sourcePath The source path
* @param {String} destPath The destination path
* @return {Promise<Object>} Promise returning the resized image info
*/
generateThumbnail (sourcePath, destPath) {
return sharp(sourcePath)
.withoutEnlargement()
.resize(150, 150)
.background('white')
.embed()
.flatten()
.toFormat('png')
.toFile(destPath)
},
/**
* Gets the image metadata.
*
* @param {String} sourcePath The source path
* @return {Object} The image metadata.
*/
getImageMetadata (sourcePath) {
return sharp(sourcePath).metadata()
}
}