Initial scaffold: Go module, SQLite schema, config loader, Telegram bot with webhook/polling modes

cmd/bot/webhook.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+
+	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+
+	"worktimeBot/internal/bot"
+)
+
+// startWebhook configures the Telegram webhook and starts the HTTP(S) listener.
+func startWebhook(botAPI *tgbotapi.BotAPI, handler *bot.Handler, webhookURL string) {
+	// Delete any previously set webhook
+	if _, err := botAPI.Request(tgbotapi.DeleteWebhookConfig{}); err != nil {
+		log.Fatal("DeleteWebhook:", err)
+	}
+
+	// Set the new webhook
+	wh, err := tgbotapi.NewWebhook(webhookURL)
+	if err != nil {
+		log.Fatal("NewWebhook:", err)
+	}
+	if _, err := botAPI.Request(wh); err != nil {
+		log.Fatal("SetWebhook:", err)
+	}
+
+	// Register the webhook endpoint and get the updates channel
+	updates := botAPI.ListenForWebhook("/webhook")
+
+	// Determine where to listen
+	listenAddr := getEnvDefault("BOT_LISTEN", ":8080")
+	tlsCert := os.Getenv("BOT_TLS_CERT")
+	tlsKey := os.Getenv("BOT_TLS_KEY")
+
+	if tlsCert != "" && tlsKey != "" {
+		log.Printf("Starting HTTPS webhook on %s", listenAddr)
+		go func() {
+			if err := http.ListenAndServeTLS(listenAddr, tlsCert, tlsKey, nil); err != nil {
+				log.Fatal("HTTPS server:", err)
+			}
+		}()
+	} else {
+		log.Printf("Starting HTTP webhook on %s (TLS handled by reverse proxy)", listenAddr)
+		go func() {
+			if err := http.ListenAndServe(listenAddr, nil); err != nil {
+				log.Fatal("HTTP server:", err)
+			}
+		}()
+	}
+
+	log.Printf("Webhook registered at %s", webhookURL)
+
+	// Process incoming updates
+	for update := range updates {
+		if update.Message != nil {
+			handler.HandleMessage(update)
+		}
+	}
+}