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path: root/vnext/server/middleware/event.js
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import config from 'config'

import { simpleParser } from 'mailparser'
import { isPM, isReply, isService } from '../common/MessageUtils'
import { sendTelegramNotification } from '../durov'
import { subscribers } from '../http'
import { sendNotification, buildNotification } from '../sender'
import debug from 'debug'
import { send } from '../hms'
var log = debug('event')

/** @type {number[]} */
const allSandboxIds = config.get('service.sandboxIds')

/**
 * handle message event
 * @param {import('../../client').Message} msg message
 */
function processMessageEvent(msg) {
    let params = {}
    params.uid = isPM(msg) ? msg.to.uid : msg.user.uid
    if (isReply(msg)) {
        params.mid = msg.mid
        params.rid = msg.rid
    } else if (!isPM(msg) && !isService(msg)) {
        params.mid = msg.mid
    }
    subscribers(new URLSearchParams(JSON.parse(JSON.stringify(params)))).then(users => {
        return users.map(user => {
            log(`${user.uname}: ${user.unreadCount}`)
            let tokenTypes = msg.service ? ['mpns', 'apns', 'fcm'] : ['mpns', 'apns', 'fcm', 'web']
            let [sandboxTokens, productionTokens] = (user.tokens || [])
                .filter(t => tokenTypes.includes(t.type))
                .map(t => t.type === 'web' ? JSON.parse(t.token) : t.token)
                .reduce((result, element) => {
                    allSandboxIds.includes(user.uid)
                        ? result[0].push(element)
                        : result[1].push(element)
                    return result
                }, [[], []])
            sendNotification(productionTokens, sandboxTokens, buildNotification(user, msg))
            let durovIds = (user.tokens || [])
                .filter(t => ['durov'].includes(t.type))
                .map(t => t.token)
            sendTelegramNotification(msg, durovIds)
            let hmsIds = (user.tokens || [])
                .filter(t => t.type === 'hcm')
                .map(t => t.token)
            log(`${user.uname}: ${hmsIds}`)
            return hmsIds
        })
    }).then(userHmsIds => {
        userHmsIds.forEach(hmsIds => {
            send(msg, hmsIds)
        })
    }).then(() => {
        // TODO: handle results
    }).catch(log)
}

/**
 * Handle new events
 * @type {import('express').RequestParamHandler}
 */
export default function handleMessage(req, res) {
    return simpleParser(req.body, {})
        .then(parsed => {
            const new_version = parsed.headers.get('x-event-version') == '1.0'
            log(`New event: ${parsed.text}, new version: ${new_version}`)
            if (new_version) {
                /** @type {import('../../client').SystemEvent} */
                const event = JSON.parse(parsed.text || '')
                if (event.type === 'message' && event.message) {
                    if (event.message.service) {
                        // TODO: remove
                        let msg = { ...event.message }
                        if (event.from) {
                            msg.user = event.from
                        }
                        processMessageEvent(msg)
                    } else {
                        processMessageEvent(event.message)
                    }

                }
            } else {
                /** @type {import('../../client').Message} */
                const msg = JSON.parse(parsed.text || '')
                processMessageEvent(msg)
            }
            res.end()
        })
        .catch(err => { log(err); res.status(400).send('Invalid request') })
}