Handler for the Telegram bot @RapGeniusBot

rapGeniusBotHandler.go

// HandleTelegramWebHook sends a message back to the chat with a punchline starting by the message provided by the user.
func HandleTelegramWebHook(w http.ResponseWriter, r *http.Request) {

	// Parse incoming request
	var update, err = parseTelegramRequest(r)
	if err != nil {
		log.Printf("error parsing update, %s", err.Error())
		return
	}

	// Sanitize input
	var sanitizedSeed = sanitize(update.Message.Text)

	// Call RapLyrics to get a punchline
	var lyric, errRapLyrics = getPunchline(sanitizedSeed)
	if errRapLyrics != nil {
		log.Printf("got error when calling RapLyrics API %s", errRapLyrics.Error())
		return
	}

	// Send the punchline back to Telegram
	var telegramResponseBody, errTelegram = sendTextToTelegramChat(update.Message.Chat.Id, lyric)
	if errTelegram != nil {
		log.Printf("got error %s from telegram, reponse body is %s", errTelegram.Error(), telegramResponseBody)
	} else {
		log.Printf("punchline %s successfuly distributed to chat id %d", lyric, update.Message.Chat.Id)
	}
}