stappabot/main.go

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"os"

	"github.com/hamcha/tg"
)

type Config struct {
	Token       string
	Bind        string
	WebhookURL  string
	WebhookPath string
}

func checkErr(err error, msg string, args ...interface{}) {
	if err != nil {
		fmt.Printf("FATAL ERROR\n"+msg+":\n  ", args...)
		fmt.Println(err.Error())
		os.Exit(1)
	}
}

var api *tg.Telegram

func main() {
	cfgpath := flag.String("config", "stappa.conf", "Path to config file")
	flag.Parse()

	cfgfile, err := os.Open(*cfgpath)
	checkErr(err, "Could not open config file")

	var cfg Config
	err = json.NewDecoder(cfgfile).Decode(&cfg)
	checkErr(err, "Could not decode JSON from config file contents")

	cfgfile.Close()

	api = tg.MakeAPIClient(cfg.Token)
	api.SetWebhook(cfg.WebhookURL)
	api.HandleWebhook(cfg.Bind, cfg.WebhookPath, webhook)
}

func webhook(update tg.APIUpdate) {
	// Ignore everything that isn't an inline query (for now)
	if update.Inline == nil {
		return
	}

	go func() {
		query := update.Inline.Query
		//TODO OFFSET
		results, err := scryfallSearch(query)
		if err != nil {
			fmt.Println(err)
			// DO SOMETHING
			return
		}

		photos := make([]tg.APIInlineQueryResultPhoto, len(results.Data))
		for i, card := range results.Data {
			caption := fmt.Sprintf("EDHREC rank: #%d - cardmarket: € %s", card.EdhrecRank, card.Eur)
			photos[i] = tg.APIInlineQueryResultPhoto{
				Type:     "photo",
				ResultID: card.ID,
				PhotoURL: card.ImageUris.Large,
				ThumbURL: card.ImageUris.Normal,
				Title:    card.Name,
				Caption:  caption,
				ReplyMarkup: &tg.APIInlineKeyboardMarkup{
					InlineKeyboard: [][]tg.APIInlineKeyboardButton{{
						{
							Text: "Scryfall",
							URL:  card.ScryfallURI,
						}, {
							Text: "EDHREC",
							URL:  card.RelatedUris.Edhrec,
						}, {
							Text: "MCM",
							URL:  card.PurchaseUris.Magiccardmarket,
						},
					}},
				},
			}
		}

		err = api.AnswerInlineQuery(tg.InlineQueryResponse{
			QueryID: update.Inline.QueryID,
			Results: photos,
		})
		if err != nil {
			fmt.Println(err)
			// DO SOMETHING
			return
		}
	}()
}