implement telegram bot

cmd/app/main.go

@@ -3,25 +3,66 @@ package main
 import (
 	"context"
 	"os"
+	"os/signal"
+	"syscall"
 
+	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/bot/telegram"
 	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/config"
 	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/logger"
+	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/provider/bybit"
 	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/repository/postgresql"
+	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/service/alerter"
+	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/usecase"
 )
 
 func main() {
-	ctx := context.Background()
-	// read config
+	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+
+	// config
 	cfg := config.MustLoad()
-	// init logger
+
+	// logger
 	log := logger.NewAppLogger(&cfg.Logger)
 	log.Info("app started")
-	// init storage
+
+	// storage
 	storage, err := postgresql.New(ctx, log, &cfg.Postgresql)
 	if err != nil {
 		log.Error("failed to connect to postgresql", "err", err)
 		os.Exit(1)
 	}
-	_ = storage
-	// init telegram bot
+
+	// usecases
+	uc := usecase.New(log, storage)
+
+	// price provider
+	priceProvider := bybit.New(log, &cfg.Providers.Bybit)
+
+	// telegram bot
+	bot, err := telegram.New(cfg.Telegram.Token, log, uc, priceProvider)
+	if err != nil {
+		log.Error("failed to create telegram bot", "err", err)
+		os.Exit(1)
+	}
+
+	// alerter service — bot acts as the notifier
+	al := alerter.New(log, priceProvider, bot, storage)
+
+	// inject alerter into bot to keep the cache in sync when alerts are created/removed
+	bot.SetAlerter(al)
+
+	// load existing active alerts into the alerter cache
+	if err := al.LoadAlerts(ctx); err != nil {
+		log.Error("failed to load alerts", "err", err)
+		os.Exit(1)
+	}
+
+	// start background price-checking loop
+	al.Run(ctx)
+
+	// run bot (blocks until ctx is cancelled)
+	bot.Run(ctx)
+
+	log.Info("app stopped")
 }