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index.js
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index.js
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#!/usr/bin/env node
const express = require('express')
const { WebClient } = require('@slack/web-api')
const schedule = require('node-schedule')
const {
// displayDatabase, // DEBUG
getLastUpdate,
setLastUpdate,
getLeaderBoard,
updateUser,
userEarnPoints,
clearDatabase,
} = require('./lib/state')
const { postLeaderboard } = require('./lib/bot')
const slackClient = new WebClient(process.env.SLACK_TOKEN)
async function getUsername(id) {
const { profile } = await slackClient.users.profile.get({ user: id })
return profile.real_name
}
const oneHour = 60 * 60 * 1e3 // in ms
const maxMessages = 1e3
async function getMessageHistory(from = 0, to = Date.now() - oneHour) {
return slackClient.conversations.history({
channel: 'C027VGR1H', // '#general'
count: maxMessages,
// Note: timestamps are in seconds
oldest: from / 1e3,
latest: to / 1e3,
}).then(async (history) => {
// console.log('>>> message history:')
// console.log(history)
await setLastUpdate(to)
// TODO: don't use this?
const userScoreMap = {} // simulate DB
history.messages
.filter((message) => 'reactions' in message)
.forEach((message) => {
let bestReactionCount = 0
// TODO: use reduce
message.reactions.forEach((reaction) => {
if (reaction.count >= bestReactionCount) {
bestReactionCount = reaction.count
const userId = reaction.users[0]
// score = redis.get(userId) || 0
const previousScore = userScoreMap[userId] || 0
// redis.set(userId, score + bestReactionCount)
userScoreMap[userId] = previousScore + bestReactionCount
// console.log(`${userId} wins ${users[userId]} points`)
userEarnPoints(userId, bestReactionCount)
}
})
})
// console.log(`userScoreMap: ${JSON.stringify(userScoreMap)}`)
// DEBUG: remove this later, since we have redis now
// Establish the (local, ephemeral) leaderboard
return Promise.all(Object.entries(userScoreMap).map(async ([userId, score]) => ({
userId,
score,
username: await getUsername(userId),
})))
}).then((leaderboard) => {
leaderboard.forEach(({ userId, username }) => {
updateUser(userId, username)
})
return leaderboard
}).catch(console.error)
}
async function updateMessages() {
const lastUpdate = await getLastUpdate()
return getMessageHistory(lastUpdate)
}
/* SLACK STUFF */
// TODO: use listeners?
// const { createEventAdapter } = require('@slack/events-api')
//
// const slackEvents = createEventAdapter(process.env.SLACK_SIGNING_SECRET)
// const port = process.env.PORT || 3000
//
// slackEvents.on('reaction_added', (event) => {
// console.log(`Received a reaction_added event: ${JSON.stringify(event)}`)
// })
//
// slackEvents.on('reaction_removed', (event) => {
// console.log(`Received a reaction_removed event: ${JSON.stringify(event)}`)
// })
//
// slackEvents.on('error', console.error)
//
// // Start a basic HTTP server
// slackEvents.start(port).then(() => {
// console.log(`server listening on port ${port}`)
// })
// Script to run every hour at 0min0sec that will check previousHourMessages
schedule.scheduleJob('0 0 * * * *', updateMessages)
/* EXPRESS STUFF */
const PORT = process.env.PORT || 8080
express()
.use(express.urlencoded({ extended: false }))
.get('/', async (req, res) => {
const data = {}
try {
await updateMessages()
data.leaderboard = await getLeaderBoard(1000)
// displayDatabase() // DEBUG
} catch (e) {
data.error = e
}
res.render('pages/index.pug', data)
})
.get('/setup', async (req, res) => {
res.send('Initializing database...')
await clearDatabase()
await getMessageHistory()
console.info('Database successfully initialized!')
})
.post('/leaderboard', async ({ body }, res) => {
res.send('Fetching the leaderboard...')
try {
await postLeaderboard(body.response_url)
console.info(`Leaderboard sent to ${body.user_name}`)
} catch (e) {
console.error('Error posting leaderboard:', e)
console.debug('Failed command with payload:', body)
}
})
.get('/clear', async (req, res) => {
res.send('Clearing the database...')
await clearDatabase()
console.info('Database successfully cleared!')
})
.get('/health', async (req, res) => {
res.status(200).send({
date: Date.now(),
message: 'ok',
uptime: process.uptime(),
})
console.debug('Health check sent!')
})
.listen(PORT, () => console.log(`Listening on port ${PORT}...`))