minmal slack bot which adds emoji's to messages that matches

main.go

package main

import (
	"strings"

	"github.com/shomali11/slacker"
	"github.com/slack-go/slack"
)

func main() {
	bot := slacker.NewClient("xoxb-YOUR-API-KEY")

	rtm := bot.RTM()
	go rtm.ManageConnection()

	for msg := range rtm.IncomingEvents {
		switch ev := msg.Data.(type) {
		case *slack.MessageEvent:
			for _, att := range ev.Msg.Attachments {
			if strings.Contains(att.Pretext, "was added as a new device.") {
				t := slack.NewRefToMessage(ev.Msg.Channel, ev.Msg.Timestamp)
				rtm.AddReaction("lock_with_ink_pen", t)
				}
			}
			if strings.Contains(ev.Msg.Text, "was added as a new device.") {
				t := slack.NewRefToMessage(ev.Msg.Channel, ev.Msg.Timestamp)
				rtm.AddReaction("lock_with_ink_pen", t)
			}

		default:
			// Ignore other events..
			//fmt.Printf("Unexpected: %v\n", msg.Data)
		}
	}
}