Initial commit: Beszel fork with Domain Locker integration

internal/hub/notifications/providers/telegram.go

@@ -0,0 +1,82 @@
+package providers
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/notification"
+)
+
+type TelegramProvider struct {
+	settings notification.TelegramSettings
+}
+
+func NewTelegramProvider(settings notification.TelegramSettings) *TelegramProvider {
+	return &TelegramProvider{settings: settings}
+}
+
+func (p *TelegramProvider) Validate() error {
+	if p.settings.BotToken == "" {
+		return fmt.Errorf("Telegram bot token is required")
+	}
+	if p.settings.ChatID == "" {
+		return fmt.Errorf("Telegram chat ID is required")
+	}
+	return nil
+}
+
+func (p *TelegramProvider) Send(msg *notification.NotificationMessage) error {
+	if err := p.Validate(); err != nil {
+		return err
+	}
+
+	icon := "✅"
+	if msg.Status == "DOWN" {
+		icon = "❌"
+	}
+
+	text := fmt.Sprintf("%s *%s*\n\n"+
+		"*Monitor:* %s\n"+
+		"*Status:* %s\n"+
+		"*Time:* %s",
+		icon,
+		msg.Title,
+		msg.MonitorName,
+		msg.Status,
+		msg.Timestamp.Format("2006-01-02 15:04:05"),
+	)
+
+	if msg.MonitorURL != "" {
+		text += fmt.Sprintf("\n*URL:* %s", msg.MonitorURL)
+	}
+
+	if msg.Ping > 0 {
+		text += fmt.Sprintf("\n*Response Time:* %dms", msg.Ping)
+	}
+
+	if msg.Message != "" {
+		text += fmt.Sprintf("\n\n*Message:* %s", msg.Message)
+	}
+
+	apiURL := fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage", p.settings.BotToken)
+
+	data := url.Values{}
+	data.Set("chat_id", p.settings.ChatID)
+	data.Set("text", text)
+	data.Set("parse_mode", "Markdown")
+
+	client := &http.Client{Timeout: 30 * time.Second}
+	resp, err := client.PostForm(apiURL, data)
+	if err != nil {
+		return fmt.Errorf("telegram API request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		return fmt.Errorf("telegram API returned status %d", resp.StatusCode)
+	}
+
+	return nil
+}