23 files changed, 920 insertions, 973 deletions

diff --git a/src/api/models/app.ts b/src/api/models/app.ts
index 68f2f448b0..fe9d49ff67 100644
--- a/src/api/models/app.ts
+++ b/src/api/models/app.ts
@@ -1,13 +1,96 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import AccessToken from './access-token';
 import db from '../../db/mongodb';
+import config from '../../conf';
 
-const collection = db.get('apps');
+const App = db.get<IApp>('apps');
+App.createIndex('name_id');
+App.createIndex('name_id_lower');
+App.createIndex('secret');
+export default App;
 
-(collection as any).createIndex('name_id'); // fuck type definition
-(collection as any).createIndex('name_id_lower'); // fuck type definition
-(collection as any).createIndex('secret'); // fuck type definition
-
-export default collection as any; // fuck type definition
+export type IApp = {
+	_id: mongo.ObjectID;
+	created_at: Date;
+	user_id: mongo.ObjectID;
+};
 
 export function isValidNameId(nameId: string): boolean {
 	return typeof nameId == 'string' && /^[a-zA-Z0-9\-]{3,30}$/.test(nameId);
 }
+
+/**
+ * Pack an app for API response
+ *
+ * @param {any} app
+ * @param {any} me?
+ * @param {any} options?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	app: any,
+	me?: any,
+	options?: {
+		includeSecret?: boolean,
+		includeProfileImageIds?: boolean
+	}
+) => new Promise<any>(async (resolve, reject) => {
+	const opts = options || {
+		includeSecret: false,
+		includeProfileImageIds: false
+	};
+
+	let _app: any;
+
+	// Populate the app if 'app' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(app)) {
+		_app = await App.findOne({
+			_id: app
+		});
+	} else if (typeof app === 'string') {
+		_app = await App.findOne({
+			_id: new mongo.ObjectID(app)
+		});
+	} else {
+		_app = deepcopy(app);
+	}
+
+	// Me
+	if (me && !mongo.ObjectID.prototype.isPrototypeOf(me)) {
+		if (typeof me === 'string') {
+			me = new mongo.ObjectID(me);
+		} else {
+			me = me._id;
+		}
+	}
+
+	// Rename _id to id
+	_app.id = _app._id;
+	delete _app._id;
+
+	delete _app.name_id_lower;
+
+	// Visible by only owner
+	if (!opts.includeSecret) {
+		delete _app.secret;
+	}
+
+	_app.icon_url = _app.icon != null
+		? `${config.drive_url}/${_app.icon}`
+		: `${config.drive_url}/app-default.jpg`;
+
+	if (me) {
+		// 既に連携しているか
+		const exist = await AccessToken.count({
+			app_id: _app.id,
+			user_id: me,
+		}, {
+				limit: 1
+			});
+
+		_app.is_authorized = exist === 1;
+	}
+
+	resolve(_app);
+});
diff --git a/src/api/models/auth-session.ts b/src/api/models/auth-session.ts
index b264a133e9..997ec61c20 100644
--- a/src/api/models/auth-session.ts
+++ b/src/api/models/auth-session.ts
@@ -1,3 +1,45 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
 import db from '../../db/mongodb';
+import { pack as packApp } from './app';
 
-export default db.get('auth_sessions') as any; // fuck type definition
+const AuthSession = db.get('auth_sessions');
+export default AuthSession;
+
+export interface IAuthSession {
+	_id: mongo.ObjectID;
+}
+
+/**
+ * Pack an auth session for API response
+ *
+ * @param {any} session
+ * @param {any} me?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	session: any,
+	me?: any
+) => new Promise<any>(async (resolve, reject) => {
+	let _session: any;
+
+	// TODO: Populate session if it ID
+
+	_session = deepcopy(session);
+
+	// Me
+	if (me && !mongo.ObjectID.prototype.isPrototypeOf(me)) {
+		if (typeof me === 'string') {
+			me = new mongo.ObjectID(me);
+		} else {
+			me = me._id;
+		}
+	}
+
+	delete _session._id;
+
+	// Populate app
+	_session.app = await packApp(_session.app_id, me);
+
+	resolve(_session);
+});
diff --git a/src/api/models/channel.ts b/src/api/models/channel.ts
index c80e84dbc8..815d53593c 100644
--- a/src/api/models/channel.ts
+++ b/src/api/models/channel.ts
@@ -1,9 +1,11 @@
 import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import { IUser } from './user';
+import Watching from './channel-watching';
 import db from '../../db/mongodb';
 
-const collection = db.get('channels');
-
-export default collection as any; // fuck type definition
+const Channel = db.get<IChannel>('channels');
+export default Channel;
 
 export type IChannel = {
 	_id: mongo.ObjectID;
@@ -12,3 +14,61 @@ export type IChannel = {
 	user_id: mongo.ObjectID;
 	index: number;
 };
+
+/**
+ * Pack a channel for API response
+ *
+ * @param channel target
+ * @param me? serializee
+ * @return response
+ */
+export const pack = (
+	channel: string | mongo.ObjectID | IChannel,
+	me?: string | mongo.ObjectID | IUser
+) => new Promise<any>(async (resolve, reject) => {
+
+	let _channel: any;
+
+	// Populate the channel if 'channel' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(channel)) {
+		_channel = await Channel.findOne({
+			_id: channel
+		});
+	} else if (typeof channel === 'string') {
+		_channel = await Channel.findOne({
+			_id: new mongo.ObjectID(channel)
+		});
+	} else {
+		_channel = deepcopy(channel);
+	}
+
+	// Rename _id to id
+	_channel.id = _channel._id;
+	delete _channel._id;
+
+	// Remove needless properties
+	delete _channel.user_id;
+
+	// Me
+	const meId: mongo.ObjectID = me
+	? mongo.ObjectID.prototype.isPrototypeOf(me)
+		? me as mongo.ObjectID
+		: typeof me === 'string'
+			? new mongo.ObjectID(me)
+			: (me as IUser)._id
+	: null;
+
+	if (me) {
+		//#region Watchしているかどうか
+		const watch = await Watching.findOne({
+			user_id: meId,
+			channel_id: _channel.id,
+			deleted_at: { $exists: false }
+		});
+
+		_channel.is_watching = watch !== null;
+		//#endregion
+	}
+
+	resolve(_channel);
+});
diff --git a/src/api/models/drive-file.ts b/src/api/models/drive-file.ts
index 802ee5a5fe..6a8db3ad42 100644
--- a/src/api/models/drive-file.ts
+++ b/src/api/models/drive-file.ts
@@ -1,9 +1,12 @@
 import * as mongodb from 'mongodb';
+import deepcopy = require('deepcopy');
+import { pack as packFolder } from './drive-folder';
+import config from '../../conf';
 import monkDb, { nativeDbConn } from '../../db/mongodb';
 
-const collection = monkDb.get('drive_files.files');
+const DriveFile = monkDb.get<IDriveFile>('drive_files.files');
 
-export default collection as any; // fuck type definition
+export default DriveFile;
 
 const getGridFSBucket = async (): Promise<mongodb.GridFSBucket> => {
 	const db = await nativeDbConn();
@@ -15,6 +18,12 @@ const getGridFSBucket = async (): Promise<mongodb.GridFSBucket> => {
 
 export { getGridFSBucket };
 
+export type IDriveFile = {
+	_id: mongodb.ObjectID;
+	created_at: Date;
+	user_id: mongodb.ObjectID;
+};
+
 export function validateFileName(name: string): boolean {
 	return (
 		(name.trim().length > 0) &&
@@ -24,3 +33,74 @@ export function validateFileName(name: string): boolean {
 		(name.indexOf('..') === -1)
 	);
 }
+
+/**
+ * Pack a drive file for API response
+ *
+ * @param {any} file
+ * @param {any} options?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	file: any,
+	options?: {
+		detail: boolean
+	}
+) => new Promise<any>(async (resolve, reject) => {
+	const opts = Object.assign({
+		detail: false
+	}, options);
+
+	let _file: any;
+
+	// Populate the file if 'file' is ID
+	if (mongodb.ObjectID.prototype.isPrototypeOf(file)) {
+		_file = await DriveFile.findOne({
+			_id: file
+		});
+	} else if (typeof file === 'string') {
+		_file = await DriveFile.findOne({
+			_id: new mongodb.ObjectID(file)
+		});
+	} else {
+		_file = deepcopy(file);
+	}
+
+	if (!_file) return reject('invalid file arg.');
+
+	// rendered target
+	let _target: any = {};
+
+	_target.id = _file._id;
+	_target.created_at = _file.uploadDate;
+	_target.name = _file.filename;
+	_target.type = _file.contentType;
+	_target.datasize = _file.length;
+	_target.md5 = _file.md5;
+
+	_target = Object.assign(_target, _file.metadata);
+
+	_target.url = `${config.drive_url}/${_target.id}/${encodeURIComponent(_target.name)}`;
+
+	if (_target.properties == null) _target.properties = {};
+
+	if (opts.detail) {
+		if (_target.folder_id) {
+			// Populate folder
+			_target.folder = await packFolder(_target.folder_id, {
+				detail: true
+			});
+		}
+
+		/*
+		if (_target.tags) {
+			// Populate tags
+			_target.tags = await _target.tags.map(async (tag: any) =>
+				await serializeDriveTag(tag)
+			);
+		}
+		*/
+	}
+
+	resolve(_target);
+});
diff --git a/src/api/models/drive-folder.ts b/src/api/models/drive-folder.ts
index f81ffe855d..48b26c2bd6 100644
--- a/src/api/models/drive-folder.ts
+++ b/src/api/models/drive-folder.ts
@@ -1,6 +1,16 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
 import db from '../../db/mongodb';
+import DriveFile from './drive-file';
 
-export default db.get('drive_folders') as any; // fuck type definition
+const DriveFolder = db.get<IDriveFolder>('drive_folders');
+export default DriveFolder;
+
+export type IDriveFolder = {
+	_id: mongo.ObjectID;
+	created_at: Date;
+	user_id: mongo.ObjectID;
+};
 
 export function isValidFolderName(name: string): boolean {
 	return (
@@ -8,3 +18,58 @@ export function isValidFolderName(name: string): boolean {
 		(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({
+			parent_id: _folder.id
+		});
+
+		const childFilesCount = await DriveFile.count({
+			'metadata.folder_id': _folder.id
+		});
+
+		_folder.folders_count = childFoldersCount;
+		_folder.files_count = childFilesCount;
+	}
+
+	if (opts.detail && _folder.parent_id) {
+		// Populate parent folder
+		_folder.parent = await pack(_folder.parent_id, {
+			detail: true
+		});
+	}
+
+	resolve(_folder);
+});
diff --git a/src/api/models/messaging-message.ts b/src/api/models/messaging-message.ts
index 18afa57e44..ffdda1db21 100644
--- a/src/api/models/messaging-message.ts
+++ b/src/api/models/messaging-message.ts
@@ -1,7 +1,12 @@
 import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import { pack as packUser } from './user';
+import { pack as packFile } from './drive-file';
 import db from '../../db/mongodb';
+import parse from '../common/text';
 
-export default db.get('messaging_messages') as any; // fuck type definition
+const MessagingMessage = db.get<IMessagingMessage>('messaging_messages');
+export default MessagingMessage;
 
 export interface IMessagingMessage {
 	_id: mongo.ObjectID;
@@ -10,3 +15,62 @@ export interface IMessagingMessage {
 export function isValidText(text: string): boolean {
 	return text.length <= 1000 && text.trim() != '';
 }
+
+/**
+ * Pack a messaging message for API response
+ *
+ * @param {any} message
+ * @param {any} me?
+ * @param {any} options?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	message: any,
+	me?: any,
+	options?: {
+		populateRecipient: boolean
+	}
+) => new Promise<any>(async (resolve, reject) => {
+	const opts = options || {
+		populateRecipient: true
+	};
+
+	let _message: any;
+
+	// Populate the message if 'message' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(message)) {
+		_message = await MessagingMessage.findOne({
+			_id: message
+		});
+	} else if (typeof message === 'string') {
+		_message = await MessagingMessage.findOne({
+			_id: new mongo.ObjectID(message)
+		});
+	} else {
+		_message = deepcopy(message);
+	}
+
+	// Rename _id to id
+	_message.id = _message._id;
+	delete _message._id;
+
+	// Parse text
+	if (_message.text) {
+		_message.ast = parse(_message.text);
+	}
+
+	// Populate user
+	_message.user = await packUser(_message.user_id, me);
+
+	if (_message.file) {
+		// Populate file
+		_message.file = await packFile(_message.file_id);
+	}
+
+	if (opts.populateRecipient) {
+		// Populate recipient
+		_message.recipient = await packUser(_message.recipient_id, me);
+	}
+
+	resolve(_message);
+});
diff --git a/src/api/models/notification.ts b/src/api/models/notification.ts
index e3dc6c70a3..fa7049d312 100644
--- a/src/api/models/notification.ts
+++ b/src/api/models/notification.ts
@@ -1,8 +1,11 @@
 import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
 import db from '../../db/mongodb';
-import { IUser } from './user';
+import { IUser, pack as packUser } from './user';
+import { pack as packPost } from './post';
 
-export default db.get('notifications') as any; // fuck type definition
+const Notification = db.get<INotification>('notifications');
+export default Notification;
 
 export interface INotification {
 	_id: mongo.ObjectID;
@@ -45,3 +48,60 @@ export interface INotification {
 	 */
 	is_read: Boolean;
 }
+
+/**
+ * Pack a notification for API response
+ *
+ * @param {any} notification
+ * @return {Promise<any>}
+ */
+export const pack = (notification: any) => new Promise<any>(async (resolve, reject) => {
+	let _notification: any;
+
+	// Populate the notification if 'notification' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(notification)) {
+		_notification = await Notification.findOne({
+			_id: notification
+		});
+	} else if (typeof notification === 'string') {
+		_notification = await Notification.findOne({
+			_id: new mongo.ObjectID(notification)
+		});
+	} else {
+		_notification = deepcopy(notification);
+	}
+
+	// Rename _id to id
+	_notification.id = _notification._id;
+	delete _notification._id;
+
+	// Rename notifier_id to user_id
+	_notification.user_id = _notification.notifier_id;
+	delete _notification.notifier_id;
+
+	const me = _notification.notifiee_id;
+	delete _notification.notifiee_id;
+
+	// Populate notifier
+	_notification.user = await packUser(_notification.user_id, me);
+
+	switch (_notification.type) {
+		case 'follow':
+			// nope
+			break;
+		case 'mention':
+		case 'reply':
+		case 'repost':
+		case 'quote':
+		case 'reaction':
+		case 'poll_vote':
+			// Populate post
+			_notification.post = await packPost(_notification.post_id, me);
+			break;
+		default:
+			console.error(`Unknown type: ${_notification.type}`);
+			break;
+	}
+
+	resolve(_notification);
+});
diff --git a/src/api/models/post-reaction.ts b/src/api/models/post-reaction.ts
index 282ae5bd21..568bfc89a2 100644
--- a/src/api/models/post-reaction.ts
+++ b/src/api/models/post-reaction.ts
@@ -1,3 +1,48 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
 import db from '../../db/mongodb';
+import Reaction from './post-reaction';
+import { pack as packUser } from './user';
 
-export default db.get('post_reactions') as any; // fuck type definition
+const PostReaction = db.get<IPostReaction>('post_reactions');
+export default PostReaction;
+
+export interface IPostReaction {
+	_id: mongo.ObjectID;
+}
+
+/**
+ * Pack a reaction for API response
+ *
+ * @param {any} reaction
+ * @param {any} me?
+ * @return {Promise<any>}
+ */
+export const pack = (
+	reaction: any,
+	me?: any
+) => new Promise<any>(async (resolve, reject) => {
+	let _reaction: any;
+
+	// Populate the reaction if 'reaction' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(reaction)) {
+		_reaction = await Reaction.findOne({
+			_id: reaction
+		});
+	} else if (typeof reaction === 'string') {
+		_reaction = await Reaction.findOne({
+			_id: new mongo.ObjectID(reaction)
+		});
+	} else {
+		_reaction = deepcopy(reaction);
+	}
+
+	// Rename _id to id
+	_reaction.id = _reaction._id;
+	delete _reaction._id;
+
+	// Populate user
+	_reaction.user = await packUser(_reaction.user_id, me);
+
+	resolve(_reaction);
+});
diff --git a/src/api/models/post.ts b/src/api/models/post.ts
index 7584ce182d..ecc5e1a5e4 100644
--- a/src/api/models/post.ts
+++ b/src/api/models/post.ts
@@ -1,8 +1,18 @@
 import * as mongo from 'mongodb';
-
+import deepcopy = require('deepcopy');
+import rap from '@prezzemolo/rap';
 import db from '../../db/mongodb';
+import { IUser, pack as packUser } from './user';
+import { pack as packApp } from './app';
+import { pack as packChannel } from './channel';
+import Vote from './poll-vote';
+import Reaction from './post-reaction';
+import { pack as packFile } from './drive-file';
+import parse from '../common/text';
+
+const Post = db.get<IPost>('posts');
 
-export default db.get('posts') as any; // fuck type definition
+export default Post;
 
 export function isValidText(text: string): boolean {
 	return text.length <= 1000 && text.trim() != '';
@@ -20,3 +30,178 @@ export type IPost = {
 	user_id: mongo.ObjectID;
 	app_id: mongo.ObjectID;
 };
+
+/**
+ * Pack a post for API response
+ *
+ * @param post target
+ * @param me? serializee
+ * @param options? serialize options
+ * @return response
+ */
+export const pack = async (
+	post: string | mongo.ObjectID | IPost,
+	me?: string | mongo.ObjectID | IUser,
+	options?: {
+		detail: boolean
+	}
+) => {
+	const opts = options || {
+		detail: true,
+	};
+
+	// Me
+	const meId: mongo.ObjectID = me
+		? mongo.ObjectID.prototype.isPrototypeOf(me)
+			? me as mongo.ObjectID
+			: typeof me === 'string'
+				? new mongo.ObjectID(me)
+				: (me as IUser)._id
+		: null;
+
+	let _post: any;
+
+	// Populate the post if 'post' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(post)) {
+		_post = await Post.findOne({
+			_id: post
+		});
+	} else if (typeof post === 'string') {
+		_post = await Post.findOne({
+			_id: new mongo.ObjectID(post)
+		});
+	} else {
+		_post = deepcopy(post);
+	}
+
+	if (!_post) throw 'invalid post arg.';
+
+	const id = _post._id;
+
+	// Rename _id to id
+	_post.id = _post._id;
+	delete _post._id;
+
+	delete _post.mentions;
+
+	// Parse text
+	if (_post.text) {
+		_post.ast = parse(_post.text);
+	}
+
+	// Populate user
+	_post.user = packUser(_post.user_id, meId);
+
+	// Populate app
+	if (_post.app_id) {
+		_post.app = packApp(_post.app_id);
+	}
+
+	// Populate channel
+	if (_post.channel_id) {
+		_post.channel = packChannel(_post.channel_id);
+	}
+
+	// Populate media
+	if (_post.media_ids) {
+		_post.media = Promise.all(_post.media_ids.map(fileId =>
+			packFile(fileId)
+		));
+	}
+
+	// When requested a detailed post data
+	if (opts.detail) {
+		// Get previous post info
+		_post.prev = (async () => {
+			const prev = await Post.findOne({
+				user_id: _post.user_id,
+				_id: {
+					$lt: id
+				}
+			}, {
+				fields: {
+					_id: true
+				},
+				sort: {
+					_id: -1
+				}
+			});
+			return prev ? prev._id : null;
+		})();
+
+		// Get next post info
+		_post.next = (async () => {
+			const next = await Post.findOne({
+				user_id: _post.user_id,
+				_id: {
+					$gt: id
+				}
+			}, {
+				fields: {
+					_id: true
+				},
+				sort: {
+					_id: 1
+				}
+			});
+			return next ? next._id : null;
+		})();
+
+		if (_post.reply_id) {
+			// Populate reply to post
+			_post.reply = pack(_post.reply_id, meId, {
+				detail: false
+			});
+		}
+
+		if (_post.repost_id) {
+			// Populate repost
+			_post.repost = pack(_post.repost_id, meId, {
+				detail: _post.text == null
+			});
+		}
+
+		// Poll
+		if (meId && _post.poll) {
+			_post.poll = (async (poll) => {
+				const vote = await Vote
+					.findOne({
+						user_id: meId,
+						post_id: id
+					});
+
+				if (vote != null) {
+					const myChoice = poll.choices
+						.filter(c => c.id == vote.choice)[0];
+
+					myChoice.is_voted = true;
+				}
+
+				return poll;
+			})(_post.poll);
+		}
+
+		// Fetch my reaction
+		if (meId) {
+			_post.my_reaction = (async () => {
+				const reaction = await Reaction
+					.findOne({
+						user_id: meId,
+						post_id: id,
+						deleted_at: { $exists: false }
+					});
+
+				if (reaction) {
+					return reaction.reaction;
+				}
+
+				return null;
+			})();
+		}
+	}
+
+	// resolve promises in _post object
+	_post = await rap(_post);
+
+	return _post;
+};
diff --git a/src/api/models/signin.ts b/src/api/models/signin.ts
index 385a348f2e..262c8707ed 100644
--- a/src/api/models/signin.ts
+++ b/src/api/models/signin.ts
@@ -1,3 +1,29 @@
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
 import db from '../../db/mongodb';
 
-export default db.get('signin') as any; // fuck type definition
+const Signin = db.get<ISignin>('signin');
+export default Signin;
+
+export interface ISignin {
+	_id: mongo.ObjectID;
+}
+
+/**
+ * Pack a signin record for API response
+ *
+ * @param {any} record
+ * @return {Promise<any>}
+ */
+export const pack = (
+	record: any
+) => new Promise<any>(async (resolve, reject) => {
+
+	const _record = deepcopy(record);
+
+	// Rename _id to id
+	_record.id = _record._id;
+	delete _record._id;
+
+	resolve(_record);
+});
diff --git a/src/api/models/user.ts b/src/api/models/user.ts
index 018979158f..48a45ac2f7 100644
--- a/src/api/models/user.ts
+++ b/src/api/models/user.ts
@@ -1,14 +1,19 @@
 import * as mongo from 'mongodb';
-
+import deepcopy = require('deepcopy');
+import rap from '@prezzemolo/rap';
 import db from '../../db/mongodb';
-import { IPost } from './post';
+import { IPost, pack as packPost } from './post';
+import Following from './following';
+import Mute from './mute';
+import getFriends from '../common/get-friends';
+import config from '../../conf';
 
-const collection = db.get('users');
+const User = db.get<IUser>('users');
 
-(collection as any).createIndex('username'); // fuck type definition
-(collection as any).createIndex('token'); // fuck type definition
+User.createIndex('username');
+User.createIndex('token');
 
-export default collection as any; // fuck type definition
+export default User;
 
 export function validateUsername(username: string): boolean {
 	return typeof username == 'string' && /^[a-zA-Z0-9\-]{3,20}$/.test(username);
@@ -83,3 +88,182 @@ export function init(user): IUser {
 	user.pinned_post_id = new mongo.ObjectID(user.pinned_post_id);
 	return user;
 }
+
+/**
+ * Pack a user for API response
+ *
+ * @param user target
+ * @param me? serializee
+ * @param options? serialize options
+ * @return Packed user
+ */
+export const pack = (
+	user: string | mongo.ObjectID | IUser,
+	me?: string | mongo.ObjectID | IUser,
+	options?: {
+		detail?: boolean,
+		includeSecrets?: boolean
+	}
+) => new Promise<any>(async (resolve, reject) => {
+
+	const opts = Object.assign({
+		detail: false,
+		includeSecrets: false
+	}, options);
+
+	let _user: any;
+
+	const fields = opts.detail ? {
+		settings: false
+	} : {
+		settings: false,
+		client_settings: false,
+		profile: false,
+		keywords: false,
+		domains: false
+	};
+
+	// Populate the user if 'user' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(user)) {
+		_user = await User.findOne({
+			_id: user
+		}, { fields });
+	} else if (typeof user === 'string') {
+		_user = await User.findOne({
+			_id: new mongo.ObjectID(user)
+		}, { fields });
+	} else {
+		_user = deepcopy(user);
+	}
+
+	if (!_user) return reject('invalid user arg.');
+
+	// Me
+	const meId: mongo.ObjectID = me
+		? mongo.ObjectID.prototype.isPrototypeOf(me)
+			? me as mongo.ObjectID
+			: typeof me === 'string'
+				? new mongo.ObjectID(me)
+				: (me as IUser)._id
+		: null;
+
+	// Rename _id to id
+	_user.id = _user._id;
+	delete _user._id;
+
+	// Remove needless properties
+	delete _user.latest_post;
+
+	// Remove private properties
+	delete _user.password;
+	delete _user.token;
+	delete _user.two_factor_temp_secret;
+	delete _user.two_factor_secret;
+	delete _user.username_lower;
+	if (_user.twitter) {
+		delete _user.twitter.access_token;
+		delete _user.twitter.access_token_secret;
+	}
+	delete _user.line;
+
+	// Visible via only the official client
+	if (!opts.includeSecrets) {
+		delete _user.email;
+		delete _user.client_settings;
+	}
+
+	if (!opts.detail) {
+		delete _user.two_factor_enabled;
+	}
+
+	_user.avatar_url = _user.avatar_id != null
+		? `${config.drive_url}/${_user.avatar_id}`
+		: `${config.drive_url}/default-avatar.jpg`;
+
+	_user.banner_url = _user.banner_id != null
+		? `${config.drive_url}/${_user.banner_id}`
+		: null;
+
+	if (!meId || !meId.equals(_user.id) || !opts.detail) {
+		delete _user.avatar_id;
+		delete _user.banner_id;
+
+		delete _user.drive_capacity;
+	}
+
+	if (meId && !meId.equals(_user.id)) {
+		// Whether the user is following
+		_user.is_following = (async () => {
+			const follow = await Following.findOne({
+				follower_id: meId,
+				followee_id: _user.id,
+				deleted_at: { $exists: false }
+			});
+			return follow !== null;
+		})();
+
+		// Whether the user is followed
+		_user.is_followed = (async () => {
+			const follow2 = await Following.findOne({
+				follower_id: _user.id,
+				followee_id: meId,
+				deleted_at: { $exists: false }
+			});
+			return follow2 !== null;
+		})();
+
+		// Whether the user is muted
+		_user.is_muted = (async () => {
+			const mute = await Mute.findOne({
+				muter_id: meId,
+				mutee_id: _user.id,
+				deleted_at: { $exists: false }
+			});
+			return mute !== null;
+		})();
+	}
+
+	if (opts.detail) {
+		if (_user.pinned_post_id) {
+			// Populate pinned post
+			_user.pinned_post = packPost(_user.pinned_post_id, meId, {
+				detail: true
+			});
+		}
+
+		if (meId && !meId.equals(_user.id)) {
+			const myFollowingIds = await getFriends(meId);
+
+			// Get following you know count
+			_user.following_you_know_count = Following.count({
+				followee_id: { $in: myFollowingIds },
+				follower_id: _user.id,
+				deleted_at: { $exists: false }
+			});
+
+			// Get followers you know count
+			_user.followers_you_know_count = Following.count({
+				followee_id: _user.id,
+				follower_id: { $in: myFollowingIds },
+				deleted_at: { $exists: false }
+			});
+		}
+	}
+
+	// resolve promises in _user object
+	_user = await rap(_user);
+
+	resolve(_user);
+});
+
+/*
+function img(url) {
+	return {
+		thumbnail: {
+			large: `${url}`,
+			medium: '',
+			small: ''
+		}
+	};
+}
+*/
diff --git a/src/api/serializers/app.ts b/src/api/serializers/app.ts
deleted file mode 100644
index 9d1c46dca4..0000000000
--- a/src/api/serializers/app.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import App from '../models/app';
-import AccessToken from '../models/access-token';
-import config from '../../conf';
-
-/**
- * Serialize an app
- *
- * @param {any} app
- * @param {any} me?
- * @param {any} options?
- * @return {Promise<any>}
- */
-export default (
-	app: any,
-	me?: any,
-	options?: {
-		includeSecret?: boolean,
-		includeProfileImageIds?: boolean
-	}
-) => new Promise<any>(async (resolve, reject) => {
-	const opts = options || {
-		includeSecret: false,
-		includeProfileImageIds: false
-	};
-
-	let _app: any;
-
-	// Populate the app if 'app' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(app)) {
-		_app = await App.findOne({
-			_id: app
-		});
-	} else if (typeof app === 'string') {
-		_app = await App.findOne({
-			_id: new mongo.ObjectID(app)
-		});
-	} else {
-		_app = deepcopy(app);
-	}
-
-	// Me
-	if (me && !mongo.ObjectID.prototype.isPrototypeOf(me)) {
-		if (typeof me === 'string') {
-			me = new mongo.ObjectID(me);
-		} else {
-			me = me._id;
-		}
-	}
-
-	// Rename _id to id
-	_app.id = _app._id;
-	delete _app._id;
-
-	delete _app.name_id_lower;
-
-	// Visible by only owner
-	if (!opts.includeSecret) {
-		delete _app.secret;
-	}
-
-	_app.icon_url = _app.icon != null
-		? `${config.drive_url}/${_app.icon}`
-		: `${config.drive_url}/app-default.jpg`;
-
-	if (me) {
-		// 既に連携しているか
-		const exist = await AccessToken.count({
-			app_id: _app.id,
-			user_id: me,
-		}, {
-				limit: 1
-			});
-
-		_app.is_authorized = exist === 1;
-	}
-
-	resolve(_app);
-});
diff --git a/src/api/serializers/auth-session.ts b/src/api/serializers/auth-session.ts
deleted file mode 100644
index a9acf1243a..0000000000
--- a/src/api/serializers/auth-session.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import serializeApp from './app';
-
-/**
- * Serialize an auth session
- *
- * @param {any} session
- * @param {any} me?
- * @return {Promise<any>}
- */
-export default (
-	session: any,
-	me?: any
-) => new Promise<any>(async (resolve, reject) => {
-	let _session: any;
-
-	// TODO: Populate session if it ID
-
-	_session = deepcopy(session);
-
-	// Me
-	if (me && !mongo.ObjectID.prototype.isPrototypeOf(me)) {
-		if (typeof me === 'string') {
-			me = new mongo.ObjectID(me);
-		} else {
-			me = me._id;
-		}
-	}
-
-	delete _session._id;
-
-	// Populate app
-	_session.app = await serializeApp(_session.app_id, me);
-
-	resolve(_session);
-});
diff --git a/src/api/serializers/channel.ts b/src/api/serializers/channel.ts
deleted file mode 100644
index 3cba39aa16..0000000000
--- a/src/api/serializers/channel.ts
+++ /dev/null
@@ -1,66 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import { IUser } from '../models/user';
-import { default as Channel, IChannel } from '../models/channel';
-import Watching from '../models/channel-watching';
-
-/**
- * Serialize a channel
- *
- * @param channel target
- * @param me? serializee
- * @return response
- */
-export default (
-	channel: string | mongo.ObjectID | IChannel,
-	me?: string | mongo.ObjectID | IUser
-) => new Promise<any>(async (resolve, reject) => {
-
-	let _channel: any;
-
-	// Populate the channel if 'channel' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(channel)) {
-		_channel = await Channel.findOne({
-			_id: channel
-		});
-	} else if (typeof channel === 'string') {
-		_channel = await Channel.findOne({
-			_id: new mongo.ObjectID(channel)
-		});
-	} else {
-		_channel = deepcopy(channel);
-	}
-
-	// Rename _id to id
-	_channel.id = _channel._id;
-	delete _channel._id;
-
-	// Remove needless properties
-	delete _channel.user_id;
-
-	// Me
-	const meId: mongo.ObjectID = me
-	? mongo.ObjectID.prototype.isPrototypeOf(me)
-		? me as mongo.ObjectID
-		: typeof me === 'string'
-			? new mongo.ObjectID(me)
-			: (me as IUser)._id
-	: null;
-
-	if (me) {
-		//#region Watchしているかどうか
-		const watch = await Watching.findOne({
-			user_id: meId,
-			channel_id: _channel.id,
-			deleted_at: { $exists: false }
-		});
-
-		_channel.is_watching = watch !== null;
-		//#endregion
-	}
-
-	resolve(_channel);
-});
diff --git a/src/api/serializers/drive-file.ts b/src/api/serializers/drive-file.ts
deleted file mode 100644
index 003e09ee77..0000000000
--- a/src/api/serializers/drive-file.ts
+++ /dev/null
@@ -1,78 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import DriveFile from '../models/drive-file';
-import serializeDriveFolder from './drive-folder';
-import serializeDriveTag from './drive-tag';
-import deepcopy = require('deepcopy');
-import config from '../../conf';
-
-/**
- * Serialize a drive file
- *
- * @param {any} file
- * @param {any} options?
- * @return {Promise<any>}
- */
-export default (
-	file: any,
-	options?: {
-		detail: boolean
-	}
-) => new Promise<any>(async (resolve, reject) => {
-	const opts = Object.assign({
-		detail: false
-	}, options);
-
-	let _file: any;
-
-	// Populate the file if 'file' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(file)) {
-		_file = await DriveFile.findOne({
-			_id: file
-		});
-	} else if (typeof file === 'string') {
-		_file = await DriveFile.findOne({
-			_id: new mongo.ObjectID(file)
-		});
-	} else {
-		_file = deepcopy(file);
-	}
-
-	if (!_file) return reject('invalid file arg.');
-
-	// rendered target
-	let _target: any = {};
-
-	_target.id = _file._id;
-	_target.created_at = _file.uploadDate;
-	_target.name = _file.filename;
-	_target.type = _file.contentType;
-	_target.datasize = _file.length;
-	_target.md5 = _file.md5;
-
-	_target = Object.assign(_target, _file.metadata);
-
-	_target.url = `${config.drive_url}/${_target.id}/${encodeURIComponent(_target.name)}`;
-
-	if (_target.properties == null) _target.properties = {};
-
-	if (opts.detail) {
-		if (_target.folder_id) {
-			// Populate folder
-			_target.folder = await serializeDriveFolder(_target.folder_id, {
-				detail: true
-			});
-		}
-
-		if (_target.tags) {
-			// Populate tags
-			_target.tags = await _target.tags.map(async (tag: any) =>
-				await serializeDriveTag(tag)
-			);
-		}
-	}
-
-	resolve(_target);
-});
diff --git a/src/api/serializers/drive-folder.ts b/src/api/serializers/drive-folder.ts
deleted file mode 100644
index 6ebf454a28..0000000000
--- a/src/api/serializers/drive-folder.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import DriveFolder from '../models/drive-folder';
-import DriveFile from '../models/drive-file';
-import deepcopy = require('deepcopy');
-
-/**
- * Serialize a drive folder
- *
- * @param {any} folder
- * @param {any} options?
- * @return {Promise<any>}
- */
-const self = (
-	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({
-			parent_id: _folder.id
-		});
-
-		const childFilesCount = await DriveFile.count({
-			'metadata.folder_id': _folder.id
-		});
-
-		_folder.folders_count = childFoldersCount;
-		_folder.files_count = childFilesCount;
-	}
-
-	if (opts.detail && _folder.parent_id) {
-		// Populate parent folder
-		_folder.parent = await self(_folder.parent_id, {
-			detail: true
-		});
-	}
-
-	resolve(_folder);
-});
-
-export default self;
diff --git a/src/api/serializers/drive-tag.ts b/src/api/serializers/drive-tag.ts
deleted file mode 100644
index 2f152381bd..0000000000
--- a/src/api/serializers/drive-tag.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import DriveTag from '../models/drive-tag';
-import deepcopy = require('deepcopy');
-
-/**
- * Serialize a drive tag
- *
- * @param {any} tag
- * @return {Promise<any>}
- */
-const self = (
-	tag: any
-) => new Promise<any>(async (resolve, reject) => {
-	let _tag: any;
-
-	// Populate the tag if 'tag' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(tag)) {
-		_tag = await DriveTag.findOne({ _id: tag });
-	} else if (typeof tag === 'string') {
-		_tag = await DriveTag.findOne({ _id: new mongo.ObjectID(tag) });
-	} else {
-		_tag = deepcopy(tag);
-	}
-
-	// Rename _id to id
-	_tag.id = _tag._id;
-	delete _tag._id;
-
-	resolve(_tag);
-});
-
-export default self;
diff --git a/src/api/serializers/messaging-message.ts b/src/api/serializers/messaging-message.ts
deleted file mode 100644
index 4ab95e42a3..0000000000
--- a/src/api/serializers/messaging-message.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import Message from '../models/messaging-message';
-import serializeUser from './user';
-import serializeDriveFile from './drive-file';
-import parse from '../common/text';
-
-/**
- * Serialize a message
- *
- * @param {any} message
- * @param {any} me?
- * @param {any} options?
- * @return {Promise<any>}
- */
-export default (
-	message: any,
-	me?: any,
-	options?: {
-		populateRecipient: boolean
-	}
-) => new Promise<any>(async (resolve, reject) => {
-	const opts = options || {
-		populateRecipient: true
-	};
-
-	let _message: any;
-
-	// Populate the message if 'message' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(message)) {
-		_message = await Message.findOne({
-			_id: message
-		});
-	} else if (typeof message === 'string') {
-		_message = await Message.findOne({
-			_id: new mongo.ObjectID(message)
-		});
-	} else {
-		_message = deepcopy(message);
-	}
-
-	// Rename _id to id
-	_message.id = _message._id;
-	delete _message._id;
-
-	// Parse text
-	if (_message.text) {
-		_message.ast = parse(_message.text);
-	}
-
-	// Populate user
-	_message.user = await serializeUser(_message.user_id, me);
-
-	if (_message.file) {
-		// Populate file
-		_message.file = await serializeDriveFile(_message.file_id);
-	}
-
-	if (opts.populateRecipient) {
-		// Populate recipient
-		_message.recipient = await serializeUser(_message.recipient_id, me);
-	}
-
-	resolve(_message);
-});
diff --git a/src/api/serializers/notification.ts b/src/api/serializers/notification.ts
deleted file mode 100644
index ac919dc8b0..0000000000
--- a/src/api/serializers/notification.ts
+++ /dev/null
@@ -1,65 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import Notification from '../models/notification';
-import serializeUser from './user';
-import serializePost from './post';
-import deepcopy = require('deepcopy');
-
-/**
- * Serialize a notification
- *
- * @param {any} notification
- * @return {Promise<any>}
- */
-export default (notification: any) => new Promise<any>(async (resolve, reject) => {
-	let _notification: any;
-
-	// Populate the notification if 'notification' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(notification)) {
-		_notification = await Notification.findOne({
-			_id: notification
-		});
-	} else if (typeof notification === 'string') {
-		_notification = await Notification.findOne({
-			_id: new mongo.ObjectID(notification)
-		});
-	} else {
-		_notification = deepcopy(notification);
-	}
-
-	// Rename _id to id
-	_notification.id = _notification._id;
-	delete _notification._id;
-
-	// Rename notifier_id to user_id
-	_notification.user_id = _notification.notifier_id;
-	delete _notification.notifier_id;
-
-	const me = _notification.notifiee_id;
-	delete _notification.notifiee_id;
-
-	// Populate notifier
-	_notification.user = await serializeUser(_notification.user_id, me);
-
-	switch (_notification.type) {
-		case 'follow':
-			// nope
-			break;
-		case 'mention':
-		case 'reply':
-		case 'repost':
-		case 'quote':
-		case 'reaction':
-		case 'poll_vote':
-			// Populate post
-			_notification.post = await serializePost(_notification.post_id, me);
-			break;
-		default:
-			console.error(`Unknown type: ${_notification.type}`);
-			break;
-	}
-
-	resolve(_notification);
-});
diff --git a/src/api/serializers/post-reaction.ts b/src/api/serializers/post-reaction.ts
deleted file mode 100644
index b8807a741c..0000000000
--- a/src/api/serializers/post-reaction.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import Reaction from '../models/post-reaction';
-import serializeUser from './user';
-
-/**
- * Serialize a reaction
- *
- * @param {any} reaction
- * @param {any} me?
- * @return {Promise<any>}
- */
-export default (
-	reaction: any,
-	me?: any
-) => new Promise<any>(async (resolve, reject) => {
-	let _reaction: any;
-
-	// Populate the reaction if 'reaction' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(reaction)) {
-		_reaction = await Reaction.findOne({
-			_id: reaction
-		});
-	} else if (typeof reaction === 'string') {
-		_reaction = await Reaction.findOne({
-			_id: new mongo.ObjectID(reaction)
-		});
-	} else {
-		_reaction = deepcopy(reaction);
-	}
-
-	// Rename _id to id
-	_reaction.id = _reaction._id;
-	delete _reaction._id;
-
-	// Populate user
-	_reaction.user = await serializeUser(_reaction.user_id, me);
-
-	resolve(_reaction);
-});
diff --git a/src/api/serializers/post.ts b/src/api/serializers/post.ts
deleted file mode 100644
index 03fd120772..0000000000
--- a/src/api/serializers/post.ts
+++ /dev/null
@@ -1,192 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import { default as Post, IPost } from '../models/post';
-import Reaction from '../models/post-reaction';
-import { IUser } from '../models/user';
-import Vote from '../models/poll-vote';
-import serializeApp from './app';
-import serializeChannel from './channel';
-import serializeUser from './user';
-import serializeDriveFile from './drive-file';
-import parse from '../common/text';
-import rap from '@prezzemolo/rap';
-
-/**
- * Serialize a post
- *
- * @param post target
- * @param me? serializee
- * @param options? serialize options
- * @return response
- */
-const self = async (
-	post: string | mongo.ObjectID | IPost,
-	me?: string | mongo.ObjectID | IUser,
-	options?: {
-		detail: boolean
-	}
-) => {
-	const opts = options || {
-		detail: true,
-	};
-
-	// Me
-	const meId: mongo.ObjectID = me
-		? mongo.ObjectID.prototype.isPrototypeOf(me)
-			? me as mongo.ObjectID
-			: typeof me === 'string'
-				? new mongo.ObjectID(me)
-				: (me as IUser)._id
-		: null;
-
-	let _post: any;
-
-	// Populate the post if 'post' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(post)) {
-		_post = await Post.findOne({
-			_id: post
-		});
-	} else if (typeof post === 'string') {
-		_post = await Post.findOne({
-			_id: new mongo.ObjectID(post)
-		});
-	} else {
-		_post = deepcopy(post);
-	}
-
-	if (!_post) throw 'invalid post arg.';
-
-	const id = _post._id;
-
-	// Rename _id to id
-	_post.id = _post._id;
-	delete _post._id;
-
-	delete _post.mentions;
-
-	// Parse text
-	if (_post.text) {
-		_post.ast = parse(_post.text);
-	}
-
-	// Populate user
-	_post.user = serializeUser(_post.user_id, meId);
-
-	// Populate app
-	if (_post.app_id) {
-		_post.app = serializeApp(_post.app_id);
-	}
-
-	// Populate channel
-	if (_post.channel_id) {
-		_post.channel = serializeChannel(_post.channel_id);
-	}
-
-	// Populate media
-	if (_post.media_ids) {
-		_post.media = Promise.all(_post.media_ids.map(fileId =>
-			serializeDriveFile(fileId)
-		));
-	}
-
-	// When requested a detailed post data
-	if (opts.detail) {
-		// Get previous post info
-		_post.prev = (async () => {
-			const prev = await Post.findOne({
-				user_id: _post.user_id,
-				_id: {
-					$lt: id
-				}
-			}, {
-				fields: {
-					_id: true
-				},
-				sort: {
-					_id: -1
-				}
-			});
-			return prev ? prev._id : null;
-		})();
-
-		// Get next post info
-		_post.next = (async () => {
-			const next = await Post.findOne({
-				user_id: _post.user_id,
-				_id: {
-					$gt: id
-				}
-			}, {
-				fields: {
-					_id: true
-				},
-				sort: {
-					_id: 1
-				}
-			});
-			return next ? next._id : null;
-		})();
-
-		if (_post.reply_id) {
-			// Populate reply to post
-			_post.reply = self(_post.reply_id, meId, {
-				detail: false
-			});
-		}
-
-		if (_post.repost_id) {
-			// Populate repost
-			_post.repost = self(_post.repost_id, meId, {
-				detail: _post.text == null
-			});
-		}
-
-		// Poll
-		if (meId && _post.poll) {
-			_post.poll = (async (poll) => {
-				const vote = await Vote
-					.findOne({
-						user_id: meId,
-						post_id: id
-					});
-
-				if (vote != null) {
-					const myChoice = poll.choices
-						.filter(c => c.id == vote.choice)[0];
-
-					myChoice.is_voted = true;
-				}
-
-				return poll;
-			})(_post.poll);
-		}
-
-		// Fetch my reaction
-		if (meId) {
-			_post.my_reaction = (async () => {
-				const reaction = await Reaction
-					.findOne({
-						user_id: meId,
-						post_id: id,
-						deleted_at: { $exists: false }
-					});
-
-				if (reaction) {
-					return reaction.reaction;
-				}
-
-				return null;
-			})();
-		}
-	}
-
-	// resolve promises in _post object
-	_post = await rap(_post);
-
-	return _post;
-};
-
-export default self;
diff --git a/src/api/serializers/signin.ts b/src/api/serializers/signin.ts
deleted file mode 100644
index 4068067678..0000000000
--- a/src/api/serializers/signin.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Module dependencies
- */
-import deepcopy = require('deepcopy');
-
-/**
- * Serialize a signin record
- *
- * @param {any} record
- * @return {Promise<any>}
- */
-export default (
-	record: any
-) => new Promise<any>(async (resolve, reject) => {
-
-	const _record = deepcopy(record);
-
-	// Rename _id to id
-	_record.id = _record._id;
-	delete _record._id;
-
-	resolve(_record);
-});
diff --git a/src/api/serializers/user.ts b/src/api/serializers/user.ts
deleted file mode 100644
index ac157097a8..0000000000
--- a/src/api/serializers/user.ts
+++ /dev/null
@@ -1,190 +0,0 @@
-/**
- * Module dependencies
- */
-import * as mongo from 'mongodb';
-import deepcopy = require('deepcopy');
-import { default as User, IUser } from '../models/user';
-import serializePost from './post';
-import Following from '../models/following';
-import Mute from '../models/mute';
-import getFriends from '../common/get-friends';
-import config from '../../conf';
-import rap from '@prezzemolo/rap';
-
-/**
- * Serialize a user
- *
- * @param user target
- * @param me? serializee
- * @param options? serialize options
- * @return response
- */
-export default (
-	user: string | mongo.ObjectID | IUser,
-	me?: string | mongo.ObjectID | IUser,
-	options?: {
-		detail?: boolean,
-		includeSecrets?: boolean
-	}
-) => new Promise<any>(async (resolve, reject) => {
-
-	const opts = Object.assign({
-		detail: false,
-		includeSecrets: false
-	}, options);
-
-	let _user: any;
-
-	const fields = opts.detail ? {
-		settings: false
-	} : {
-		settings: false,
-		client_settings: false,
-		profile: false,
-		keywords: false,
-		domains: false
-	};
-
-	// Populate the user if 'user' is ID
-	if (mongo.ObjectID.prototype.isPrototypeOf(user)) {
-		_user = await User.findOne({
-			_id: user
-		}, { fields });
-	} else if (typeof user === 'string') {
-		_user = await User.findOne({
-			_id: new mongo.ObjectID(user)
-		}, { fields });
-	} else {
-		_user = deepcopy(user);
-	}
-
-	if (!_user) return reject('invalid user arg.');
-
-	// Me
-	const meId: mongo.ObjectID = me
-		? mongo.ObjectID.prototype.isPrototypeOf(me)
-			? me as mongo.ObjectID
-			: typeof me === 'string'
-				? new mongo.ObjectID(me)
-				: (me as IUser)._id
-		: null;
-
-	// Rename _id to id
-	_user.id = _user._id;
-	delete _user._id;
-
-	// Remove needless properties
-	delete _user.latest_post;
-
-	// Remove private properties
-	delete _user.password;
-	delete _user.token;
-	delete _user.two_factor_temp_secret;
-	delete _user.two_factor_secret;
-	delete _user.username_lower;
-	if (_user.twitter) {
-		delete _user.twitter.access_token;
-		delete _user.twitter.access_token_secret;
-	}
-	delete _user.line;
-
-	// Visible via only the official client
-	if (!opts.includeSecrets) {
-		delete _user.email;
-		delete _user.client_settings;
-	}
-
-	if (!opts.detail) {
-		delete _user.two_factor_enabled;
-	}
-
-	_user.avatar_url = _user.avatar_id != null
-		? `${config.drive_url}/${_user.avatar_id}`
-		: `${config.drive_url}/default-avatar.jpg`;
-
-	_user.banner_url = _user.banner_id != null
-		? `${config.drive_url}/${_user.banner_id}`
-		: null;
-
-	if (!meId || !meId.equals(_user.id) || !opts.detail) {
-		delete _user.avatar_id;
-		delete _user.banner_id;
-
-		delete _user.drive_capacity;
-	}
-
-	if (meId && !meId.equals(_user.id)) {
-		// Whether the user is following
-		_user.is_following = (async () => {
-			const follow = await Following.findOne({
-				follower_id: meId,
-				followee_id: _user.id,
-				deleted_at: { $exists: false }
-			});
-			return follow !== null;
-		})();
-
-		// Whether the user is followed
-		_user.is_followed = (async () => {
-			const follow2 = await Following.findOne({
-				follower_id: _user.id,
-				followee_id: meId,
-				deleted_at: { $exists: false }
-			});
-			return follow2 !== null;
-		})();
-
-		// Whether the user is muted
-		_user.is_muted = (async () => {
-			const mute = await Mute.findOne({
-				muter_id: meId,
-				mutee_id: _user.id,
-				deleted_at: { $exists: false }
-			});
-			return mute !== null;
-		})();
-	}
-
-	if (opts.detail) {
-		if (_user.pinned_post_id) {
-			// Populate pinned post
-			_user.pinned_post = serializePost(_user.pinned_post_id, meId, {
-				detail: true
-			});
-		}
-
-		if (meId && !meId.equals(_user.id)) {
-			const myFollowingIds = await getFriends(meId);
-
-			// Get following you know count
-			_user.following_you_know_count = Following.count({
-				followee_id: { $in: myFollowingIds },
-				follower_id: _user.id,
-				deleted_at: { $exists: false }
-			});
-
-			// Get followers you know count
-			_user.followers_you_know_count = Following.count({
-				followee_id: _user.id,
-				follower_id: { $in: myFollowingIds },
-				deleted_at: { $exists: false }
-			});
-		}
-	}
-
-	// resolve promises in _user object
-	_user = await rap(_user);
-
-	resolve(_user);
-});
-/*
-function img(url) {
-	return {
-		thumbnail: {
-			large: `${url}`,
-			medium: '',
-			small: ''
-		}
-	};
-}
-*/