mizzkey/src/api/bot/core.ts

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import * as EventEmitter from 'events';
import * as bcrypt from 'bcryptjs';
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import User, { IUser, init as initUser } from '../models/user';
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import getPostSummary from '../../common/get-post-summary';
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import getUserSummary from '../../common/get-user-summary';
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/**
* Botの頭脳
*/
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export default class BotCore extends EventEmitter {
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public user: IUser = null;
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private context: Context = null;
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constructor(user?: IUser) {
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super();
this.user = user;
}
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public clearContext() {
this.setContext(null);
}
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public setContext(context: Context) {
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this.context = context;
this.emit('updated');
if (context) {
context.on('updated', () => {
this.emit('updated');
});
}
}
public export() {
return {
user: this.user,
context: this.context ? this.context.export() : null
};
}
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protected _import(data) {
this.user = data.user ? initUser(data.user) : null;
this.setContext(data.context ? Context.import(this, data.context) : null);
}
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public static import(data) {
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const bot = new BotCore();
bot._import(data);
return bot;
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}
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public async q(query: string): Promise<string | void> {
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if (this.context != null) {
return await this.context.q(query);
}
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if (/^@[a-zA-Z0-9-]+$/.test(query)) {
return await this.showUserCommand(query);
}
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switch (query) {
case 'ping':
return 'PONG';
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case 'help':
case 'ヘルプ':
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return '利用可能なコマンド一覧です:\n' +
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'help: これです\n' +
'me: アカウント情報を見ます\n' +
'login, signin: サインインします\n' +
'logout, signout: サインアウトします\n' +
'post: 投稿します\n' +
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'tl: タイムラインを見ます\n' +
'@<ユーザー名>: ユーザーを表示します';
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case 'me':
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return this.user ? `${this.user.name}としてサインインしています。\n\n${getUserSummary(this.user)}` : 'サインインしていません';
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case 'login':
case 'signin':
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case 'ログイン':
case 'サインイン':
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if (this.user != null) return '既にサインインしていますよ!';
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this.setContext(new SigninContext(this));
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return await this.context.greet();
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case 'logout':
case 'signout':
case 'ログアウト':
case 'サインアウト':
if (this.user == null) return '今はサインインしてないですよ!';
this.signout();
return 'ご利用ありがとうございました <3';
case 'post':
case '投稿':
if (this.user == null) return 'まずサインインしてください。';
this.setContext(new PostContext(this));
return await this.context.greet();
case 'tl':
case 'タイムライン':
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return await this.tlCommand();
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default:
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return '?';
}
}
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public signin(user: IUser) {
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this.user = user;
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this.emit('signin', user);
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this.emit('updated');
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}
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public signout() {
const user = this.user;
this.user = null;
this.emit('signout', user);
this.emit('updated');
}
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public async tlCommand(): Promise<string | void> {
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if (this.user == null) return 'まずサインインしてください。';
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const tl = await require('../endpoints/posts/timeline')({
limit: 5
}, this.user);
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const text = tl
.map(post => getPostSummary(post))
.join('\n-----\n');
return text;
}
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public async showUserCommand(q: string): Promise<string | void> {
try {
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const user = await require('../../endpoints/users/show')({
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username: q.substr(1)
}, this.user);
const text = getUserSummary(user);
return text;
} catch (e) {
return `問題が発生したようです...: ${e}`;
}
}
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}
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abstract class Context extends EventEmitter {
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protected bot: BotCore;
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public abstract async greet(): Promise<string>;
public abstract async q(query: string): Promise<string>;
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public abstract export(): any;
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constructor(bot: BotCore) {
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super();
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this.bot = bot;
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}
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public static import(bot: BotCore, data: any) {
if (data.type == 'post') return PostContext.import(bot, data.content);
if (data.type == 'signin') return SigninContext.import(bot, data.content);
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return null;
}
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}
class SigninContext extends Context {
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private temporaryUser: IUser = null;
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public async greet(): Promise<string> {
return 'まずユーザー名を教えてください:';
}
public async q(query: string): Promise<string> {
if (this.temporaryUser == null) {
// Fetch user
const user: IUser = await User.findOne({
username_lower: query.toLowerCase()
}, {
fields: {
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data: false
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}
});
if (user === null) {
return `${query}というユーザーは存在しませんでした... もう一度教えてください:`;
} else {
this.temporaryUser = user;
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this.emit('updated');
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return `パスワードを教えてください:`;
}
} else {
// Compare password
const same = bcrypt.compareSync(query, this.temporaryUser.password);
if (same) {
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this.bot.signin(this.temporaryUser);
this.bot.clearContext();
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return `${this.temporaryUser.name}さん、おかえりなさい!`;
} else {
return `パスワードが違います... もう一度教えてください:`;
}
}
}
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public export() {
return {
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type: 'signin',
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content: {
temporaryUser: this.temporaryUser
}
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};
}
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public static import(bot: BotCore, data: any) {
const context = new SigninContext(bot);
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context.temporaryUser = data.temporaryUser;
return context;
}
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}
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class PostContext extends Context {
public async greet(): Promise<string> {
return '内容:';
}
public async q(query: string): Promise<string> {
await require('../endpoints/posts/create')({
text: query
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}, this.bot.user);
this.bot.clearContext();
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return '投稿しましたよ!';
}
public export() {
return {
type: 'post'
};
}
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public static import(bot: BotCore, data: any) {
const context = new PostContext(bot);
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return context;
}
}