etordomdagen.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"net/url"
	"os"
	"strings"

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

const destinationChannel = "C0CJRSFGW"

// #etordadgangen
const gameChannel = "C01956TBMTP"

func main() {
	api := slack.New(
		os.Getenv("SLACK_API"),
		// slack.OptionDebug(true),
		slack.OptionLog(log.New(os.Stdout, "slack-bot: ", log.Lshortfile|log.LstdFlags)),
	)

	rtm := api.NewRTM()
	go rtm.ManageConnection()

	words := make([]string, 0)

	for msg := range rtm.IncomingEvents {
		fmt.Print("Event Received: ")
		switch ev := msg.Data.(type) {
		case *slack.ConnectedEvent:
			fmt.Println("Infos:", ev.Info)
			fmt.Println("Connection counter:", ev.ConnectionCount)

		case *slack.MessageEvent:
			fmt.Printf("Message: %v\n", ev)
			// rtm.SendMessage(rtm.NewOutgoingMessage("Hello world", ev.Channel))

			if ev.Channel != gameChannel {
				continue
			}
			if ev.Type != "message" {
				continue
			}
			if len(ev.Text) <= 0 {
				continue
			}
			if ev.Text[0] == '<' {
				continue
			}

			word := strings.TrimSpace(ev.Text)
			words = append(words, word)
			if strings.ContainsAny(word, ".!?") {
				go sendAudio(rtm, strings.Join(words, " "))
				words = make([]string, 0)
			}

		case *slack.RTMError:
			fmt.Printf("Error: %s\n", ev.Error())

		case *slack.InvalidAuthEvent:
			fmt.Printf("Invalid credentials")
			return

		default:

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

func sendAudio(rtm *slack.RTM, s string) {
	// https://www.dr.dk/tjenester/tts?text=-Edb-personen%20G%C3
	url := url.URL{}
	q := url.Query()
	q.Add("text", fmt.Sprint("-", s))
	url.RawQuery = q.Encode()
	url.Path = "/tjenester/tts"
	url.Scheme = "https"
	url.Host = "dr.dk"
	log.Printf(url.String())
	payload, err := http.Get(url.String())
	if err != nil {
		log.Printf("could not fetch tts: %s", err)
		return
	}
	defer payload.Body.Close()

	_, err = rtm.UploadFile(slack.FileUploadParameters{
		Reader:   payload.Body,
		Channels: []string{destinationChannel},
		Filename: fmt.Sprint(s, "mp3"),
	})
	if err != nil {
		log.Printf("could not upload tts to slack: %s", err)
	}

}