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const jetpack = require('fs-jetpack');
const randomstring = require('randomstring');
const path = require('path');
const JWT = require('jsonwebtoken');
const db = require('knex')({
client: process.env.DB_CLIENT,
connection: {
host: process.env.DB_HOST,
user: process.env.DB_USER,
password: process.env.DB_PASSWORD,
database: process.env.DB_DATABASE,
filename: path.join(__dirname, '..', '..', '..', 'database.sqlite')
},
useNullAsDefault: process.env.DB_CLIENT === 'sqlite' ? true : false
});
const moment = require('moment');
const crypto = require('crypto');
const Zip = require('adm-zip');
const uuidv4 = require('uuid/v4');
const log = require('./Log');
const ThumbUtil = require('./ThumbUtil');
const blockedExtensions = process.env.BLOCKED_EXTENSIONS.split(',');
class Util {
static uploadPath = path.join(__dirname, '..', '..', '..', process.env.UPLOAD_FOLDER);
static uuid() {
return uuidv4();
}
static isExtensionBlocked(extension) {
return blockedExtensions.includes(extension);
}
static constructFilePublicLink(file) {
/*
TODO: This wont work without a reverse proxy serving both
the site and the API under the same domain. Pls fix.
*/
file.url = `${process.env.DOMAIN}/${file.name}`;
const { thumb, preview } = ThumbUtil.getFileThumbnail(file.name) || {};
if (thumb) {
file.thumb = `${process.env.DOMAIN}/thumbs/${thumb}`;
file.thumbSquare = `${process.env.DOMAIN}/thumbs/square/${thumb}`;
file.preview = preview && `${process.env.DOMAIN}/thumbs/preview/${preview}`;
}
return file;
}
static getUniqueFilename(name) {
const retry = (i = 0) => {
const filename =
randomstring.generate({
length: parseInt(process.env.GENERATED_FILENAME_LENGTH, 10),
capitalization: 'lowercase'
}) + path.extname(name).toLowerCase();
// TODO: Change this to look for the file in the db instead of in the filesystem
const exists = jetpack.exists(path.join(Util.uploadPath, filename));
if (!exists) return filename;
if (i < 5) return retry(i + 1);
log.error('Couldnt allocate identifier for file');
return null;
};
return retry();
}
static getUniqueAlbumIdentifier() {
const retry = async (i = 0) => {
const identifier = randomstring.generate({
length: parseInt(process.env.GENERATED_ALBUM_LENGTH, 10),
capitalization: 'lowercase'
});
const exists = await db
.table('links')
.where({ identifier })
.first();
if (!exists) return identifier;
/*
It's funny but if you do i++ the asignment never gets done resulting in an infinite loop
*/
if (i < 5) return retry(++i);
log.error('Couldnt allocate identifier for album');
return null;
};
return retry();
}
static async getFileHash(filename) {
const file = await jetpack.readAsync(path.join(Util.uploadPath, filename), 'buffer');
if (!file) {
log.error(`There was an error reading the file < ${filename} > for hashing`);
return null;
}
const hash = crypto.createHash('md5');
hash.update(file, 'utf8');
return hash.digest('hex');
}
static generateFileHash(data) {
const hash = crypto
.createHash('md5')
.update(data)
.digest('hex');
return hash;
}
static getFilenameFromPath(fullPath) {
return fullPath.replace(/^.*[\\\/]/, ''); // eslint-disable-line no-useless-escape
}
static async deleteFile(filename, deleteFromDB = false) {
const thumbName = ThumbUtil.getFileThumbnail(filename);
try {
await jetpack.removeAsync(path.join(Util.uploadPath, filename));
await ThumbUtil.removeThumbs(thumbName);
if (deleteFromDB) {
await db
.table('files')
.where('name', filename)
.delete();
}
} catch (error) {
log.error(`There was an error removing the file < ${filename} >`);
log.error(error);
}
}
static async deleteAllFilesFromAlbum(id) {
try {
const fileAlbums = await db.table('albumsFiles').where({ albumId: id });
for (const fileAlbum of fileAlbums) {
const file = await db
.table('files')
.where({ id: fileAlbum.fileId })
.first();
if (!file) continue;
await this.deleteFile(file.name, true);
}
} catch (error) {
log.error(error);
}
}
static async deleteAllFilesFromUser(id) {
try {
const files = await db.table('files').where({ userId: id });
for (const file of files) {
await this.deleteFile(file.name, true);
}
} catch (error) {
log.error(error);
}
}
static async deleteAllFilesFromTag(id) {
try {
const fileTags = await db.table('fileTags').where({ tagId: id });
for (const fileTag of fileTags) {
const file = await db
.table('files')
.where({ id: fileTag.fileId })
.first();
if (!file) continue;
await this.deleteFile(file.name, true);
}
} catch (error) {
log.error(error);
}
}
static isAuthorized(req) {
if (!req.headers.authorization) return false;
const token = req.headers.authorization.split(' ')[1];
if (!token) return false;
return JWT.verify(token, process.env.SECRET, async (error, decoded) => {
if (error) {
log.error(error);
return false;
}
const id = decoded ? decoded.sub : '';
const iat = decoded ? decoded.iat : '';
const user = await db
.table('users')
.where({ id })
.first();
if (!user || !user.enabled) return false;
if (iat && iat < moment(user.passwordEditedAt).format('x')) return false;
return user;
});
}
static createZip(files, album) {
try {
const zip = new Zip();
for (const file of files) {
zip.addLocalFile(path.join(Util.uploadPath, file));
}
zip.writeZip(
path.join(
__dirname,
'..',
'..',
'..',
process.env.UPLOAD_FOLDER,
'zips',
`${album.userId}-${album.id}.zip`
)
);
} catch (error) {
log.error(error);
}
}
}
module.exports = Util;
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