81 lines
1.8 KiB
TypeScript
81 lines
1.8 KiB
TypeScript
import * as EventEmitter from 'events';
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import * as express from 'express';
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import * as request from 'request';
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import * as crypto from 'crypto';
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//import User from '../../models/user';
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import config from '../../../conf';
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import BotCore from '../core';
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const sessions: Array<{
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sourceId: string;
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session: BotCore;
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}> = [];
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module.exports = async (app: express.Application) => {
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if (config.line_bot == null) return;
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const handler = new EventEmitter();
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handler.on('message', async (ev) => {
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// テキスト以外(スタンプなど)は無視
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if (ev.message.type !== 'text') return;
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const sourceId = ev.source.userId;
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let session = sessions.find(s => {
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return s.sourceId === sourceId;
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});
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if (!session) {
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session = {
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sourceId: sourceId,
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session: new BotCore()
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};
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sessions.push(session);
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}
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const res = await session.session.q(ev.message.text);
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request({
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url: 'https://api.line.me/v2/bot/message/reply',
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headers: {
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'Authorization': `Bearer ${config.line_bot.channel_access_token}`
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},
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json: {
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replyToken: ev.replyToken,
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messages: [{
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type: 'text',
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text: res
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}]
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}
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}, (err, res, body) => {
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if (err) {
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console.error(err);
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return;
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}
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});
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});
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app.post('/hooks/line', (req, res, next) => {
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// req.headers['x-line-signature'] は常に string ですが、型定義の都合上
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// string | string[] になっているので string を明示しています
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const sig1 = req.headers['x-line-signature'] as string;
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const hash = crypto.createHmac('SHA256', config.line_bot.channel_secret)
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.update((req as any).rawBody);
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const sig2 = hash.digest('base64');
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// シグネチャ比較
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if (sig1 === sig2) {
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req.body.events.forEach(ev => {
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handler.emit(ev.type, ev);
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});
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res.sendStatus(200);
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} else {
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res.sendStatus(400);
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}
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});
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};
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