determine number of live promises by live politicians

index.js

const politicians = require('./politicians.json')
const promises = require('./promises.json') // live promises

const result = {
    promisesWithLivePoliticians: {
        total: 0
    },
    promisesWithOfflinePoliticians: {
        total: 0
    }
}

promises.forEach(promise => {
    const politician = politicians.find(x => x.id === promise.politician_id)
    const isLive = politician.live
    if(isLive) {
        result.promisesWithLivePoliticians.total++
        if (typeof result.promisesWithLivePoliticians[politician.name] === 'number') {
            result.promisesWithLivePoliticians[politician.name]++
        } else {
            result.promisesWithLivePoliticians[politician.name] = 0
        }
    } else {
        result.promisesWithOfflinePoliticians.total++
        if (typeof result.promisesWithOfflinePoliticians[politician.name] === 'number') {
            result.promisesWithOfflinePoliticians[politician.name]++
        } else {
            result.promisesWithOfflinePoliticians[politician.name] = 0
        }
    }
})

console.log(result)