add-file-to-drive - 見通しを良くする
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otofune
parent
519bb82b03
commit
51faa7a227
@ -32,29 +32,18 @@ const addToGridFS = (name: string, readable: stream.Readable, type: string, meta
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readable.pipe(writeStream);
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}));
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/**
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* Add file to drive
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*
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* @param user User who wish to add file
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* @param file File path or readableStream
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* @param comment Comment
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* @param type File type
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* @param folderId Folder ID
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* @param force If set to true, forcibly upload the file even if there is a file with the same hash.
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* @return Object that represents added file
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*/
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export default (
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const addFile = async (
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user: any,
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file: string | stream.Readable,
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name: string = null,
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comment: string = null,
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folderId: mongodb.ObjectID = null,
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force: boolean = false
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) => new Promise<any>((resolve, reject) => {
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) => {
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log(`registering ${name} (user: ${user.username})`);
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// Get file path
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new Promise((res: (v: string) => void, rej) => {
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const path = await new Promise((res: (v: string) => void, rej) => {
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if (typeof file === 'string') {
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res(file);
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return;
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@ -75,141 +64,155 @@ export default (
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.catch(rej);
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}
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rej(new Error('un-compatible file.'));
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})
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// Calculate hash, get content type and get file size
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.then(path => Promise.all([
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path,
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// hash
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((): Promise<string> => new Promise((res, rej) => {
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const readable = fs.createReadStream(path);
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const hash = crypto.createHash('md5');
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const chunks = [];
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readable
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.on('error', rej)
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.pipe(hash)
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.on('error', rej)
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.on('data', (chunk) => chunks.push(chunk))
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.on('end', () => {
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const buffer = Buffer.concat(chunks);
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res(buffer.toString('hex'));
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});
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}))(),
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// mime
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((): Promise<[string, string | null]> => new Promise((res, rej) => {
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const readable = fs.createReadStream(path);
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readable
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.on('error', rej)
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.once('data', (buffer: Buffer) => {
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readable.destroy();
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const type = fileType(buffer);
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if (!type) {
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return res(['application/octet-stream', null]);
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}
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return res([type.mime, type.ext]);
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});
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}))(),
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// size
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((): Promise<number> => new Promise((res, rej) => {
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fs.stat(path, (err, stats) => {
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if (err) return rej(err);
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res(stats.size);
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});
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}))()
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]))
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.then(async ([path, hash, [mime, ext], size]) => {
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log(`hash: ${hash}, mime: ${mime}, ext: ${ext}, size: ${size}`);
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// detect name
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const detectedName: string = name || (ext ? `untitled.${ext}` : 'untitled');
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if (!force) {
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// Check if there is a file with the same hash
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const much = await DriveFile.findOne({
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md5: hash,
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'metadata.user_id': user._id
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});
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if (much !== null) {
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log('file with same hash is found');
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return resolve(much);
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} else {
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log('file with same hash is not found');
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}
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}
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const [properties, folder] = await Promise.all([
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// properties
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(async () => {
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if (!/^image\/.*$/.test(mime)) {
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return null;
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}
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// If the file is an image, calculate width and height to save in property
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const g = gm(fs.createReadStream(path), name);
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const size = await prominence(g).size();
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const properties = {
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width: size.width,
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height: size.height
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};
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log('image width and height is calculated');
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return properties;
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})(),
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// folder
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(async () => {
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if (!folderId) {
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return null;
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}
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const driveFolder = await DriveFolder.findOne({
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_id: folderId,
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user_id: user._id
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});
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if (!driveFolder) {
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throw 'folder-not-found';
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}
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return driveFolder;
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})(),
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// usage checker
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(async () => {
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// Calculate drive usage
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const usage = await DriveFile
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.aggregate([
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{ $match: { 'metadata.user_id': user._id } },
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{
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$project: {
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length: true
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}
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},
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{
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$group: {
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_id: null,
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usage: { $sum: '$length' }
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}
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}
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])
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.then((aggregates: any[]) => {
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if (aggregates.length > 0) {
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return aggregates[0].usage;
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}
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return 0;
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});
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log(`drive usage is ${usage}`);
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// If usage limit exceeded
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if (usage + size > user.drive_capacity) {
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throw 'no-free-space';
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}
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})()
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]);
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});
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// Calculate hash, get content type and get file size
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const [hash, [mime, ext], size] = await Promise.all([
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// hash
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((): Promise<string> => new Promise((res, rej) => {
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const readable = fs.createReadStream(path);
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return addToGridFS(detectedName, readable, mime, {
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user_id: user._id,
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folder_id: folder !== null ? folder._id : null,
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comment: comment,
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properties: properties
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const hash = crypto.createHash('md5');
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const chunks = [];
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readable
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.on('error', rej)
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.pipe(hash)
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.on('error', rej)
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.on('data', (chunk) => chunks.push(chunk))
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.on('end', () => {
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const buffer = Buffer.concat(chunks);
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res(buffer.toString('hex'));
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});
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}))(),
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// mime
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((): Promise<[string, string | null]> => new Promise((res, rej) => {
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const readable = fs.createReadStream(path);
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readable
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.on('error', rej)
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.once('data', (buffer: Buffer) => {
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readable.destroy();
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const type = fileType(buffer);
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if (!type) {
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return res(['application/octet-stream', null]);
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}
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return res([type.mime, type.ext]);
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});
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}))(),
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// size
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((): Promise<number> => new Promise((res, rej) => {
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fs.stat(path, (err, stats) => {
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if (err) return rej(err);
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res(stats.size);
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});
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})
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}))()
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]);
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log(`hash: ${hash}, mime: ${mime}, ext: ${ext}, size: ${size}`);
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// detect name
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const detectedName: string = name || (ext ? `untitled.${ext}` : 'untitled');
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if (!force) {
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// Check if there is a file with the same hash
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const much = await DriveFile.findOne({
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md5: hash,
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'metadata.user_id': user._id
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});
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if (much !== null) {
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log('file with same hash is found');
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return much;
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} else {
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log('file with same hash is not found');
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}
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}
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const [properties, folder] = await Promise.all([
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// properties
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(async () => {
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if (!/^image\/.*$/.test(mime)) {
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return null;
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}
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// If the file is an image, calculate width and height to save in property
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const g = gm(fs.createReadStream(path), name);
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const size = await prominence(g).size();
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const properties = {
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width: size.width,
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height: size.height
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};
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log('image width and height is calculated');
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return properties;
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})(),
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// folder
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(async () => {
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if (!folderId) {
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return null;
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}
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const driveFolder = await DriveFolder.findOne({
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_id: folderId,
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user_id: user._id
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});
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if (!driveFolder) {
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throw 'folder-not-found';
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}
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return driveFolder;
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})(),
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// usage checker
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(async () => {
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// Calculate drive usage
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const usage = await DriveFile
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.aggregate([
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{ $match: { 'metadata.user_id': user._id } },
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{
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$project: {
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length: true
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}
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},
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{
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$group: {
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_id: null,
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usage: { $sum: '$length' }
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}
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}
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])
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.then((aggregates: any[]) => {
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if (aggregates.length > 0) {
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return aggregates[0].usage;
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}
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return 0;
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});
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log(`drive usage is ${usage}`);
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// If usage limit exceeded
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if (usage + size > user.drive_capacity) {
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throw 'no-free-space';
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}
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})()
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]);
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const readable = fs.createReadStream(path);
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return addToGridFS(detectedName, readable, mime, {
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user_id: user._id,
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folder_id: folder !== null ? folder._id : null,
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comment: comment,
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properties: properties
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});
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};
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/**
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* Add file to drive
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*
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* @param user User who wish to add file
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* @param file File path or readableStream
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* @param comment Comment
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* @param type File type
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* @param folderId Folder ID
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* @param force If set to true, forcibly upload the file even if there is a file with the same hash.
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* @return Object that represents added file
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*/
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export default (user: any, file: string | stream.Readable, ...args) => new Promise<any>((resolve, reject) => {
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addFile(user, file, ...args)
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.then(file => {
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log(`drive file has been created ${file._id}`);
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resolve(file);
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