import * as mongodb from 'mongodb'; import * as crypto from 'crypto'; import * as gm from 'gm'; import * as debug from 'debug'; import fileType = require('file-type'); import prominence = require('prominence'); import DriveFile, { getGridFSBucket } from '../models/drive-file'; import DriveFolder from '../models/drive-folder'; import serialize from '../serializers/drive-file'; import event from '../event'; import config from '../../conf'; import { Buffer } from 'buffer'; import * as fs from 'fs'; import * as tmp from 'tmp'; import * as stream from 'stream'; const log = debug('misskey:register-drive-file'); const tmpFile = (): Promise => new Promise((resolve, reject) => { tmp.file((e, path) => { if (e) return reject(e); resolve(path); }); }); const addToGridFS = (name: string, readable: stream.Readable, type: string, metadata: any): Promise => getGridFSBucket() .then(bucket => new Promise((resolve, reject) => { const writeStream = bucket.openUploadStream(name, { contentType: type, metadata }); writeStream.once('finish', (doc) => { resolve(doc); }); writeStream.on('error', reject); readable.pipe(writeStream); })); /** * Add file to drive * * @param user User who wish to add file * @param file File path, binary, or readableStream * @param comment Comment * @param type File type * @param folderId Folder ID * @param force If set to true, forcibly upload the file even if there is a file with the same hash. * @return Object that represents added file */ export default ( user: any, file: string | Buffer | stream.Readable, name: string = null, comment: string = null, folderId: mongodb.ObjectID = null, force: boolean = false ) => new Promise((resolve, reject) => { log(`registering ${name} (user: ${user.username})`); // Get file path new Promise((res: (v: string) => void, rej) => { if (typeof file === 'string') { res(file); return; } if (file instanceof Buffer) { tmpFile() .then(path => { fs.writeFile(path, file, (err) => { if (err) rej(err); res(path); }); }) .catch(rej); return; } if (typeof file === 'object' && typeof file.read === 'function') { tmpFile() .then(path => { const readable: stream.Readable = file; const writable = fs.createWriteStream(path); readable .on('error', rej) .on('end', () => { res(path); }) .pipe(writable) .on('error', rej); }) .catch(rej); } rej(new Error('un-compatible file.')); }) // Calculate hash, get content type and get file size .then(path => Promise.all([ path, // hash ((): Promise => new Promise((res, rej) => { const readable = fs.createReadStream(path); const hash = crypto.createHash('md5'); const chunks = []; readable .on('error', rej) .pipe(hash) .on('error', rej) .on('data', (chunk) => chunks.push(chunk)) .on('end', () => { const buffer = Buffer.concat(chunks); res(buffer.toString('hex')); }); }))(), // mime ((): Promise<[string, string | null]> => new Promise((res, rej) => { const readable = fs.createReadStream(path); readable .on('error', rej) .once('data', (buffer: Buffer) => { readable.destroy(); const type = fileType(buffer); if (!type) { return res(['application/octet-stream', null]); } return res([type.mime, type.ext]); }); }))(), // size ((): Promise => new Promise((res, rej) => { fs.stat(path, (err, stats) => { if (err) return rej(err); res(stats.size); }); }))() ])) .then(async ([path, hash, [mime, ext], size]) => { log(`hash: ${hash}, mime: ${mime}, ext: ${ext}, size: ${size}`); // detect name const detectedName: string = name || (ext ? `untitled.${ext}` : 'untitled'); if (!force) { // Check if there is a file with the same hash const much = await DriveFile.findOne({ md5: hash, 'metadata.user_id': user._id }); if (much !== null) { log('file with same hash is found'); return resolve(much); } else { log('file with same hash is not found'); } } const [properties, folder] = await Promise.all([ // properties (async () => { if (!/^image\/.*$/.test(mime)) { return null; } // If the file is an image, calculate width and height to save in property const g = gm(fs.createReadStream(path), name); const size = await prominence(g).size(); const properties = { width: size.width, height: size.height }; log('image width and height is calculated'); return properties; })(), // folder (async () => { if (!folderId) { return null; } const driveFolder = await DriveFolder.findOne({ _id: folderId, user_id: user._id }); if (!driveFolder) { throw 'folder-not-found'; } return driveFolder; })(), // usage checker (async () => { // Calculate drive usage const usage = await DriveFile .aggregate([ { $match: { 'metadata.user_id': user._id } }, { $project: { length: true } }, { $group: { _id: null, usage: { $sum: '$length' } } } ]) .then((aggregates: any[]) => { if (aggregates.length > 0) { return aggregates[0].usage; } return 0; }); log(`drive usage is ${usage}`); // If usage limit exceeded if (usage + size > user.drive_capacity) { throw 'no-free-space'; } })() ]); const readable = fs.createReadStream(path); return addToGridFS(name, readable, mime, { user_id: user._id, folder_id: folder !== null ? folder._id : null, comment: comment, properties: properties }); }) .then(file => { log(`drive file has been created ${file._id}`); resolve(file); return serialize(file); }) .then(serializedFile => { // Publish drive_file_created event event(user._id, 'drive_file_created', fileObj); // Register to search database if (config.elasticsearch.enable) { const es = require('../../db/elasticsearch'); es.index({ index: 'misskey', type: 'drive_file', id: file._id.toString(), body: { name: file.name, user_id: user._id.toString() } }); } }) .catch(reject); });