BotClass.js

class Bot {
    init(TOKEN) {
        return new Promise((resolve, reject) => {
            let url = `https://api.telegram.org/bot${TOKEN}/getMe`
            request(url, (error, r, body) => {
                const response = JSON.parse(body).result
                if (error) return
                if (!response) return
                this.id = response.id || ''
                this.first_name = response.first_name || ''
                this.last_name = response.last_name || ''
                this.username = response.username || ''
                this.language_code = response.language_code || ''
                resolve()
            })
        })
    }

    getName() {
        if (this.last_name) {
            return `${this.first_name} ${this.last_name}`
        }
        else {
            return `${this.first_name}`
        }
    }

    introduceYourself() {
        console.log(`Hello, my name is ${this.getName()}. You can talk to me through my username: @${this.username}`);
    }

}