echotron's Introduction

echotron

Library for telegram bots written in pure go

Fetch with

go get github.com/NicoNex/echotron/v3

Usage

Long Polling

A very simple implementation:

package main

import (
    "log"

    "github.com/NicoNex/echotron/v3"
)

type bot struct {
    chatID int64
    echotron.API
}

const token = "YOUR TELEGRAM TOKEN"

func newBot(chatID int64) echotron.Bot {
    return &bot{
        chatID,
        echotron.NewAPI(token),
    }
}

func (b *bot) Update(update *echotron.Update) {
    if update.Message.Text == "/start" {
        b.SendMessage("Hello world", b.chatID, nil)
    }
}

func main() {
    dsp := echotron.NewDispatcher(token, newBot)
    log.Println(dsp.Poll())
}

Also proof of concept with self destruction for low ram usage

package main

import (
    "log"
    "time"

    "github.com/NicoNex/echotron/v3"
)

type bot struct {
    chatID int64
    echotron.API
}

const token = "YOUR TELEGRAM TOKEN"

var dsp echotron.Dispatcher

func newBot(chatID int64) echotron.Bot {
    var bot = &bot{
        chatID,
        echotron.NewAPI(token),
    }
    go bot.selfDestruct(time.After(time.Hour))
    return bot
}

func (b *bot) selfDestruct(timech <- chan time.Time) {
    select {
    case <-timech:
        b.SendMessage("goodbye", b.chatID, nil)
        dsp.DelSession(b.chatID)
    }
}

func (b *bot) Update(update *echotron.Update) {
    if update.Message.Text == "/start" {
        b.SendMessage("Hello world", b.chatId, nil)
    }
}

func main() {
    dsp := echotron.NewDispatcher(token, newBot)
    log.Println(dsp.Poll())
}

Webhook

package main

import "github.com/NicoNex/echotron/v3"

type bot struct {
	chatID int64
	echotron.API
}

const token = "YOUR TELEGRAM TOKEN"

func newBot(chatID int64) echotron.Bot {
	return &bot{
		chatID,
		echotron.NewAPI(token),
	}
}

func (b *bot) Update(update *echotron.Update) {
	if update.Message.Text == "/start" {
		b.SendMessage("Hello world", b.chatID, nil)
	}
}

func main() {
	dsp := echotron.NewDispatcher(token, newBot)
	dsp.ListenWebhook("https://example.com:443/my_bot_token")
}

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