なんかもうめっちゃ変えた

3 files changed, 832 insertions, 0 deletions

diff --git a/packages/backend/src/server/api/integration/DiscordServerService.ts b/packages/backend/src/server/api/integration/DiscordServerService.ts
new file mode 100644
index 0000000000..604013c454
--- /dev/null
+++ b/packages/backend/src/server/api/integration/DiscordServerService.ts
@@ -0,0 +1,315 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Redis } from 'ioredis';
+import Router from '@koa/router';
+import { OAuth2 } from 'oauth';
+import { v4 as uuid } from 'uuid';
+import { IsNull } from 'typeorm';
+import { Config } from '@/config.js';
+import { UserProfilesRepository, UsersRepository } from '@/models/index.js';
+import { DI } from '@/di-symbols.js';
+import { HttpRequestService } from '@/core/HttpRequestService.js';
+import type { ILocalUser } from '@/models/entities/User.js';
+import { GlobalEventService } from '@/core/GlobalEventService.js';
+import { MetaService } from '@/core/MetaService.js';
+import { UserEntityService } from '@/core/entities/UserEntityService.js';
+import { SigninService } from '../SigninService.js';
+import type Koa from 'koa';
+
+@Injectable()
+export class DiscordServerService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.redis)
+		private redisClient: Redis,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+
+		private userEntityService: UserEntityService,
+		private httpRequestService: HttpRequestService,
+		private globalEventService: GlobalEventService,
+		private metaService: MetaService,
+		private signinService: SigninService,
+	) {
+	}
+
+	public create() {
+		const router = new Router();
+
+		router.get('/disconnect/discord', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (!userToken) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const user = await this.usersRepository.findOneByOrFail({
+				host: IsNull(),
+				token: userToken,
+			});
+
+			const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+			delete profile.integrations.discord;
+
+			await this.userProfilesRepository.update(user.id, {
+				integrations: profile.integrations,
+			});
+
+			ctx.body = 'Discordの連携を解除しました :v:';
+
+			// Publish i updated event
+			this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+				detail: true,
+				includeSecrets: true,
+			}));
+		});
+
+		const getOAuth2 = async () => {
+			const meta = await this.metaService.fetch(true);
+
+			if (meta.enableDiscordIntegration) {
+				return new OAuth2(
+			meta.discordClientId!,
+			meta.discordClientSecret!,
+			'https://discord.com/',
+			'api/oauth2/authorize',
+			'api/oauth2/token');
+			} else {
+				return null;
+			}
+		};
+
+		router.get('/connect/discord', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (!userToken) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const params = {
+				redirect_uri: `${this.config.url}/api/dc/cb`,
+				scope: ['identify'],
+				state: uuid(),
+				response_type: 'code',
+			};
+
+			this.redisClient.set(userToken, JSON.stringify(params));
+
+			const oauth2 = await getOAuth2();
+			ctx.redirect(oauth2!.getAuthorizeUrl(params));
+		});
+
+		router.get('/signin/discord', async ctx => {
+			const sessid = uuid();
+
+			const params = {
+				redirect_uri: `${this.config.url}/api/dc/cb`,
+				scope: ['identify'],
+				state: uuid(),
+				response_type: 'code',
+			};
+
+			ctx.cookies.set('signin_with_discord_sid', sessid, {
+				path: '/',
+				secure: this.config.url.startsWith('https'),
+				httpOnly: true,
+			});
+
+			this.redisClient.set(sessid, JSON.stringify(params));
+
+			const oauth2 = await getOAuth2();
+			ctx.redirect(oauth2!.getAuthorizeUrl(params));
+		});
+
+		router.get('/dc/cb', async ctx => {
+			const userToken = this.#getUserToken(ctx);
+
+			const oauth2 = await getOAuth2();
+
+			if (!userToken) {
+				const sessid = ctx.cookies.get('signin_with_discord_sid');
+
+				if (!sessid) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const code = ctx.query.code;
+
+				if (!code || typeof code !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { redirect_uri, state } = await new Promise<any>((res, rej) => {
+					this.redisClient.get(sessid, async (_, state) => {
+						res(JSON.parse(state));
+					});
+				});
+
+				if (ctx.query.state !== state) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { accessToken, refreshToken, expiresDate } = await new Promise<any>((res, rej) =>
+			oauth2!.getOAuthAccessToken(code, {
+				grant_type: 'authorization_code',
+				redirect_uri,
+			}, (err, accessToken, refreshToken, result) => {
+				if (err) {
+					rej(err);
+				} else if (result.error) {
+					rej(result.error);
+				} else {
+					res({
+						accessToken,
+						refreshToken,
+						expiresDate: Date.now() + Number(result.expires_in) * 1000,
+					});
+				}
+			}));
+
+				const { id, username, discriminator } = (await this.httpRequestService.getJson('https://discord.com/api/users/@me', '*/*', 10 * 1000, {
+					'Authorization': `Bearer ${accessToken}`,
+				})) as Record<string, unknown>;
+
+				if (typeof id !== 'string' || typeof username !== 'string' || typeof discriminator !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const profile = await this.userProfilesRepository.createQueryBuilder()
+					.where('"integrations"->\'discord\'->>\'id\' = :id', { id: id })
+					.andWhere('"userHost" IS NULL')
+					.getOne();
+
+				if (profile == null) {
+					ctx.throw(404, `@${username}#${discriminator}と連携しているMisskeyアカウントはありませんでした...`);
+					return;
+				}
+
+				await this.userProfilesRepository.update(profile.userId, {
+					integrations: {
+						...profile.integrations,
+						discord: {
+							id: id,
+							accessToken: accessToken,
+							refreshToken: refreshToken,
+							expiresDate: expiresDate,
+							username: username,
+							discriminator: discriminator,
+						},
+					},
+				});
+
+				this.signinService.signin(ctx, await this.usersRepository.findOneBy({ id: profile.userId }) as ILocalUser, true);
+			} else {
+				const code = ctx.query.code;
+
+				if (!code || typeof code !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { redirect_uri, state } = await new Promise<any>((res, rej) => {
+					this.redisClient.get(userToken, async (_, state) => {
+						res(JSON.parse(state));
+					});
+				});
+
+				if (ctx.query.state !== state) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { accessToken, refreshToken, expiresDate } = await new Promise<any>((res, rej) =>
+			oauth2!.getOAuthAccessToken(code, {
+				grant_type: 'authorization_code',
+				redirect_uri,
+			}, (err, accessToken, refreshToken, result) => {
+				if (err) {
+					rej(err);
+				} else if (result.error) {
+					rej(result.error);
+				} else {
+					res({
+						accessToken,
+						refreshToken,
+						expiresDate: Date.now() + Number(result.expires_in) * 1000,
+					});
+				}
+			}));
+
+				const { id, username, discriminator } = (await this.httpRequestService.getJson('https://discord.com/api/users/@me', '*/*', 10 * 1000, {
+					'Authorization': `Bearer ${accessToken}`,
+				})) as Record<string, unknown>;
+				if (typeof id !== 'string' || typeof username !== 'string' || typeof discriminator !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const user = await this.usersRepository.findOneByOrFail({
+					host: IsNull(),
+					token: userToken,
+				});
+
+				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+				await this.userProfilesRepository.update(user.id, {
+					integrations: {
+						...profile.integrations,
+						discord: {
+							accessToken: accessToken,
+							refreshToken: refreshToken,
+							expiresDate: expiresDate,
+							id: id,
+							username: username,
+							discriminator: discriminator,
+						},
+					},
+				});
+
+				ctx.body = `Discord: @${username}#${discriminator} を、Misskey: @${user.username} に接続しました！`;
+
+				// Publish i updated event
+				this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+					detail: true,
+					includeSecrets: true,
+				}));
+			}
+		});
+
+		return router;
+	}
+
+	#getUserToken(ctx: Koa.BaseContext): string | null {
+		return ((ctx.headers['cookie'] ?? '').match(/igi=(\w+)/) ?? [null, null])[1];
+	}
+	
+	#compareOrigin(ctx: Koa.BaseContext): boolean {
+		function normalizeUrl(url?: string): string {
+			return url ? url.endsWith('/') ? url.substr(0, url.length - 1) : url : '';
+		}
+	
+		const referer = ctx.headers['referer'];
+	
+		return (normalizeUrl(referer) === normalizeUrl(this.config.url));
+	}
+}
diff --git a/packages/backend/src/server/api/integration/GithubServerService.ts b/packages/backend/src/server/api/integration/GithubServerService.ts
new file mode 100644
index 0000000000..6864f21523
--- /dev/null
+++ b/packages/backend/src/server/api/integration/GithubServerService.ts
@@ -0,0 +1,287 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Redis } from 'ioredis';
+import Router from '@koa/router';
+import { OAuth2 } from 'oauth';
+import { v4 as uuid } from 'uuid';
+import { IsNull } from 'typeorm';
+import { Config } from '@/config.js';
+import { UserProfilesRepository, UsersRepository } from '@/models/index.js';
+import { DI } from '@/di-symbols.js';
+import { HttpRequestService } from '@/core/HttpRequestService.js';
+import type { ILocalUser } from '@/models/entities/User.js';
+import { GlobalEventService } from '@/core/GlobalEventService.js';
+import { MetaService } from '@/core/MetaService.js';
+import { UserEntityService } from '@/core/entities/UserEntityService.js';
+import { SigninService } from '../SigninService.js';
+import type Koa from 'koa';
+
+@Injectable()
+export class GithubServerService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.redis)
+		private redisClient: Redis,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+
+		private userEntityService: UserEntityService,
+		private httpRequestService: HttpRequestService,
+		private globalEventService: GlobalEventService,
+		private metaService: MetaService,
+		private signinService: SigninService,
+	) {
+	}
+
+	public create() {
+		const router = new Router();
+
+		router.get('/disconnect/github', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (!userToken) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const user = await this.usersRepository.findOneByOrFail({
+				host: IsNull(),
+				token: userToken,
+			});
+
+			const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+			delete profile.integrations.github;
+
+			await this.userProfilesRepository.update(user.id, {
+				integrations: profile.integrations,
+			});
+
+			ctx.body = 'GitHubの連携を解除しました :v:';
+
+			// Publish i updated event
+			this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+				detail: true,
+				includeSecrets: true,
+			}));
+		});
+
+		const getOath2 = async () => {
+			const meta = await this.metaService.fetch(true);
+
+			if (meta.enableGithubIntegration && meta.githubClientId && meta.githubClientSecret) {
+				return new OAuth2(
+					meta.githubClientId,
+					meta.githubClientSecret,
+					'https://github.com/',
+					'login/oauth/authorize',
+					'login/oauth/access_token');
+			} else {
+				return null;
+			}
+		};
+
+		router.get('/connect/github', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (!userToken) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const params = {
+				redirect_uri: `${this.config.url}/api/gh/cb`,
+				scope: ['read:user'],
+				state: uuid(),
+			};
+
+			this.redisClient.set(userToken, JSON.stringify(params));
+
+			const oauth2 = await getOath2();
+			ctx.redirect(oauth2!.getAuthorizeUrl(params));
+		});
+
+		router.get('/signin/github', async ctx => {
+			const sessid = uuid();
+
+			const params = {
+				redirect_uri: `${this.config.url}/api/gh/cb`,
+				scope: ['read:user'],
+				state: uuid(),
+			};
+
+			ctx.cookies.set('signin_with_github_sid', sessid, {
+				path: '/',
+				secure: this.config.url.startsWith('https'),
+				httpOnly: true,
+			});
+
+			this.redisClient.set(sessid, JSON.stringify(params));
+
+			const oauth2 = await getOath2();
+			ctx.redirect(oauth2!.getAuthorizeUrl(params));
+		});
+
+		router.get('/gh/cb', async ctx => {
+			const userToken = this.#getUserToken(ctx);
+
+			const oauth2 = await getOath2();
+
+			if (!userToken) {
+				const sessid = ctx.cookies.get('signin_with_github_sid');
+
+				if (!sessid) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const code = ctx.query.code;
+
+				if (!code || typeof code !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { redirect_uri, state } = await new Promise<any>((res, rej) => {
+					this.redisClient.get(sessid, async (_, state) => {
+						res(JSON.parse(state));
+					});
+				});
+
+				if (ctx.query.state !== state) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { accessToken } = await new Promise<any>((res, rej) =>
+			oauth2!.getOAuthAccessToken(code, {
+				redirect_uri,
+			}, (err, accessToken, refresh, result) => {
+				if (err) {
+					rej(err);
+				} else if (result.error) {
+					rej(result.error);
+				} else {
+					res({ accessToken });
+				}
+			}));
+
+				const { login, id } = (await this.httpRequestService.getJson('https://api.github.com/user', 'application/vnd.github.v3+json', 10 * 1000, {
+					'Authorization': `bearer ${accessToken}`,
+				})) as Record<string, unknown>;
+				if (typeof login !== 'string' || typeof id !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const link = await this.userProfilesRepository.createQueryBuilder()
+					.where('"integrations"->\'github\'->>\'id\' = :id', { id: id })
+					.andWhere('"userHost" IS NULL')
+					.getOne();
+
+				if (link == null) {
+					ctx.throw(404, `@${login}と連携しているMisskeyアカウントはありませんでした...`);
+					return;
+				}
+
+				this.signinService.signin(ctx, await this.usersRepository.findOneBy({ id: link.userId }) as ILocalUser, true);
+			} else {
+				const code = ctx.query.code;
+
+				if (!code || typeof code !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { redirect_uri, state } = await new Promise<any>((res, rej) => {
+					this.redisClient.get(userToken, async (_, state) => {
+						res(JSON.parse(state));
+					});
+				});
+
+				if (ctx.query.state !== state) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const { accessToken } = await new Promise<any>((res, rej) =>
+			oauth2!.getOAuthAccessToken(
+				code,
+				{ redirect_uri },
+				(err, accessToken, refresh, result) => {
+					if (err) {
+						rej(err);
+					} else if (result.error) {
+						rej(result.error);
+					} else {
+						res({ accessToken });
+					}
+				}));
+
+				const { login, id } = (await this.httpRequestService.getJson('https://api.github.com/user', 'application/vnd.github.v3+json', 10 * 1000, {
+					'Authorization': `bearer ${accessToken}`,
+				})) as Record<string, unknown>;
+
+				if (typeof login !== 'string' || typeof id !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const user = await this.usersRepository.findOneByOrFail({
+					host: IsNull(),
+					token: userToken,
+				});
+
+				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+				await this.userProfilesRepository.update(user.id, {
+					integrations: {
+						...profile.integrations,
+						github: {
+							accessToken: accessToken,
+							id: id,
+							login: login,
+						},
+					},
+				});
+
+				ctx.body = `GitHub: @${login} を、Misskey: @${user.username} に接続しました！`;
+
+				// Publish i updated event
+				this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+					detail: true,
+					includeSecrets: true,
+				}));
+			}
+		});
+
+		return router;
+	}
+
+	#getUserToken(ctx: Koa.BaseContext): string | null {
+		return ((ctx.headers['cookie'] ?? '').match(/igi=(\w+)/) ?? [null, null])[1];
+	}
+	
+	#compareOrigin(ctx: Koa.BaseContext): boolean {
+		function normalizeUrl(url?: string): string {
+			return url ? url.endsWith('/') ? url.substr(0, url.length - 1) : url : '';
+		}
+	
+		const referer = ctx.headers['referer'];
+	
+		return (normalizeUrl(referer) === normalizeUrl(this.config.url));
+	}
+}
diff --git a/packages/backend/src/server/api/integration/TwitterServerService.ts b/packages/backend/src/server/api/integration/TwitterServerService.ts
new file mode 100644
index 0000000000..14b5f40ea5
--- /dev/null
+++ b/packages/backend/src/server/api/integration/TwitterServerService.ts
@@ -0,0 +1,230 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Redis } from 'ioredis';
+import Router from '@koa/router';
+import { v4 as uuid } from 'uuid';
+import { IsNull } from 'typeorm';
+import autwh from 'autwh';
+import { Config } from '@/config.js';
+import { UserProfilesRepository, UsersRepository } from '@/models/index.js';
+import { DI } from '@/di-symbols.js';
+import { HttpRequestService } from '@/core/HttpRequestService.js';
+import type { ILocalUser } from '@/models/entities/User.js';
+import { GlobalEventService } from '@/core/GlobalEventService.js';
+import { MetaService } from '@/core/MetaService.js';
+import { UserEntityService } from '@/core/entities/UserEntityService.js';
+import { SigninService } from '../SigninService.js';
+import type Koa from 'koa';
+
+@Injectable()
+export class TwitterServerService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.redis)
+		private redisClient: Redis,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+
+		private userEntityService: UserEntityService,
+		private httpRequestService: HttpRequestService,
+		private globalEventService: GlobalEventService,
+		private metaService: MetaService,
+		private signinService: SigninService,
+	) {
+	}
+
+	public create() {
+		const router = new Router();
+
+		router.get('/disconnect/twitter', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (userToken == null) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const user = await this.usersRepository.findOneByOrFail({
+				host: IsNull(),
+				token: userToken,
+			});
+
+			const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+			delete profile.integrations.twitter;
+
+			await this.userProfilesRepository.update(user.id, {
+				integrations: profile.integrations,
+			});
+
+			ctx.body = 'Twitterの連携を解除しました :v:';
+
+			// Publish i updated event
+			this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+				detail: true,
+				includeSecrets: true,
+			}));
+		});
+
+		const getTwAuth = async () => {
+			const meta = await this.metaService.fetch(true);
+
+			if (meta.enableTwitterIntegration && meta.twitterConsumerKey && meta.twitterConsumerSecret) {
+				return autwh({
+					consumerKey: meta.twitterConsumerKey,
+					consumerSecret: meta.twitterConsumerSecret,
+					callbackUrl: `${this.config.url}/api/tw/cb`,
+				});
+			} else {
+				return null;
+			}
+		};
+
+		router.get('/connect/twitter', async ctx => {
+			if (!this.#compareOrigin(ctx)) {
+				ctx.throw(400, 'invalid origin');
+				return;
+			}
+
+			const userToken = this.#getUserToken(ctx);
+			if (userToken == null) {
+				ctx.throw(400, 'signin required');
+				return;
+			}
+
+			const twAuth = await getTwAuth();
+			const twCtx = await twAuth!.begin();
+			this.redisClient.set(userToken, JSON.stringify(twCtx));
+			ctx.redirect(twCtx.url);
+		});
+
+		router.get('/signin/twitter', async ctx => {
+			const twAuth = await getTwAuth();
+			const twCtx = await twAuth!.begin();
+
+			const sessid = uuid();
+
+			this.redisClient.set(sessid, JSON.stringify(twCtx));
+
+			ctx.cookies.set('signin_with_twitter_sid', sessid, {
+				path: '/',
+				secure: this.config.url.startsWith('https'),
+				httpOnly: true,
+			});
+
+			ctx.redirect(twCtx.url);
+		});
+
+		router.get('/tw/cb', async ctx => {
+			const userToken = this.#getUserToken(ctx);
+
+			const twAuth = await getTwAuth();
+
+			if (userToken == null) {
+				const sessid = ctx.cookies.get('signin_with_twitter_sid');
+
+				if (sessid == null) {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const get = new Promise<any>((res, rej) => {
+					this.redisClient.get(sessid, async (_, twCtx) => {
+						res(twCtx);
+					});
+				});
+
+				const twCtx = await get;
+
+				const verifier = ctx.query.oauth_verifier;
+				if (!verifier || typeof verifier !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const result = await twAuth!.done(JSON.parse(twCtx), verifier);
+
+				const link = await this.userProfilesRepository.createQueryBuilder()
+					.where('"integrations"->\'twitter\'->>\'userId\' = :id', { id: result.userId })
+					.andWhere('"userHost" IS NULL')
+					.getOne();
+
+				if (link == null) {
+					ctx.throw(404, `@${result.screenName}と連携しているMisskeyアカウントはありませんでした...`);
+					return;
+				}
+
+				this.signinService.signin(ctx, await this.usersRepository.findOneBy({ id: link.userId }) as ILocalUser, true);
+			} else {
+				const verifier = ctx.query.oauth_verifier;
+
+				if (!verifier || typeof verifier !== 'string') {
+					ctx.throw(400, 'invalid session');
+					return;
+				}
+
+				const get = new Promise<any>((res, rej) => {
+					this.redisClient.get(userToken, async (_, twCtx) => {
+						res(twCtx);
+					});
+				});
+
+				const twCtx = await get;
+
+				const result = await twAuth!.done(JSON.parse(twCtx), verifier);
+
+				const user = await this.usersRepository.findOneByOrFail({
+					host: IsNull(),
+					token: userToken,
+				});
+
+				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+				await this.userProfilesRepository.update(user.id, {
+					integrations: {
+						...profile.integrations,
+						twitter: {
+							accessToken: result.accessToken,
+							accessTokenSecret: result.accessTokenSecret,
+							userId: result.userId,
+							screenName: result.screenName,
+						},
+					},
+				});
+
+				ctx.body = `Twitter: @${result.screenName} を、Misskey: @${user.username} に接続しました！`;
+
+				// Publish i updated event
+				this.globalEventService.publishMainStream(user.id, 'meUpdated', await this.userEntityService.pack(user, user, {
+					detail: true,
+					includeSecrets: true,
+				}));
+			}
+		});
+
+		return router;
+	}
+
+	#getUserToken(ctx: Koa.BaseContext): string | null {
+		return ((ctx.headers['cookie'] ?? '').match(/igi=(\w+)/) ?? [null, null])[1];
+	}
+	
+	#compareOrigin(ctx: Koa.BaseContext): boolean {
+		function normalizeUrl(url?: string): string {
+			return url ? url.endsWith('/') ? url.substr(0, url.length - 1) : url : '';
+		}
+	
+		const referer = ctx.headers['referer'];
+	
+		return (normalizeUrl(referer) === normalizeUrl(this.config.url));
+	}
+}