整理した

src/models/drive-folder.ts

@@ -0,0 +1,77 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import db from '../db/mongodb';
+import DriveFile from './drive-file';
+
+const DriveFolder = db.get<IDriveFolder>('drive_folders');
+export default DriveFolder;
+
+export type IDriveFolder = {
+	_id: mongo.ObjectID;
+	createdAt: Date;
+	name: string;
+	userId: mongo.ObjectID;
+	parentId: mongo.ObjectID;
+};
+
+export function isValidFolderName(name: string): boolean {
+	return (
+		(name.trim().length > 0) &&
+		(name.length <= 200)
+	);
+}
+
+/**
+ * Pack a drive folder for API response
+ *
+ * @param {any} folder
+ * @param {any} options?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	folder: any,
+	options?: {
+		detail: boolean
+	}
+) => new Promise<any>(async (resolve, reject) => {
+	const opts = Object.assign({
+		detail: false
+	}, options);
+
+	let _folder: any;
+
+	// Populate the folder if 'folder' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(folder)) {
+		_folder = await DriveFolder.findOne({ _id: folder });
+	} else if (typeof folder === 'string') {
+		_folder = await DriveFolder.findOne({ _id: new mongo.ObjectID(folder) });
+	} else {
+		_folder = deepcopy(folder);
+	}
+
+	// Rename _id to id
+	_folder.id = _folder._id;
+	delete _folder._id;
+
+	if (opts.detail) {
+		const childFoldersCount = await DriveFolder.count({
+			parentId: _folder.id
+		});
+
+		const childFilesCount = await DriveFile.count({
+			'metadata.folderId': _folder.id
+		});
+
+		_folder.foldersCount = childFoldersCount;
+		_folder.filesCount = childFilesCount;
+	}
+
+	if (opts.detail && _folder.parentId) {
+		// Populate parent folder
+		_folder.parent = await pack(_folder.parentId, {
+			detail: true
+		});
+	}
+
+	resolve(_folder);
+});