feat: /xr command for currency exchange rates

main.go

@@ -4,7 +4,9 @@ import (
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 
+	"git.gensokyo.cafe/kkyy/mycurrencynet"
 	"go.uber.org/zap"
 	tele "gopkg.in/telebot.v3"
 
@@ -22,6 +24,25 @@ func initLogger() {
 	logger = l.Sugar()
 }
 
+var exchangeRates = mycurrencynet.New()
+
+func initExchangeRates() {
+	if err := exchangeRates.Update(); err != nil {
+		logger.Panicw("Failed to update exchange rates", "err", err)
+	}
+	logger.Info("Exchange rates updated")
+
+	go exchangeRates.UpdateEvery(
+		time.Hour,
+		func(err error) {
+			logger.Errorw("Failed to update exchange rates", "err", err)
+		},
+		func() {
+			logger.Info("Exchange rates updated")
+		},
+	)
+}
+
 func runBot() {
 	logger.Info("Bot initializing...")
 	bot, err := initBot()
@@ -37,6 +58,7 @@ func runBot() {
 			{Text: "traffic", Description: "Show traffic usage."},
 			{Text: "dig", Description: "Diggy diggy dig."},
 			{Text: "year_progress", Description: "Time doesn't wait."},
+			{Text: "xr", Description: "Currency exchange rates"},
 		}); err != nil {
 			logger.Fatalw("Failed to announce commands", "err", err)
 		}
@@ -45,6 +67,8 @@ func runBot() {
 	botFinCh := utils.WaitFor(bot.Start)
 	logger.Infow("Bot started", "username", bot.Me.Username)
 
+	go initExchangeRates()
+
 	// listen for shutdown signal
 	sigCh := make(chan os.Signal, 1)
 	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)