Revert "cleanup v2"

This reverts commit 8b82578809.

agent/internal/app/monitor.go

@@ -0,0 +1,130 @@
+package app
+
+import (
+	"context"
+	"crypto/x509"
+	"database/sql"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/corecontrol/agent/internal/models"
+	"github.com/corecontrol/agent/internal/notifications"
+)
+
+// MonitorApplications checks and updates the status of all applications
+func MonitorApplications(db *sql.DB, client *http.Client, apps []models.Application, notifSender *notifications.NotificationSender) {
+	var notificationTemplate string
+	err := db.QueryRow("SELECT notification_text_application FROM settings LIMIT 1").Scan(&notificationTemplate)
+	if err != nil || notificationTemplate == "" {
+		notificationTemplate = "The application !name (!url) went !status!"
+	}
+
+	for _, app := range apps {
+		logPrefix := fmt.Sprintf("[App %s (%s)]", app.Name, app.PublicURL)
+		fmt.Printf("%s Checking...\n", logPrefix)
+
+		// Determine which URL to use for monitoring
+		checkURL := app.PublicURL
+		if app.UptimeCheckURL != "" {
+			checkURL = app.UptimeCheckURL
+			fmt.Printf("%s Using custom uptime check URL: %s\n", logPrefix, checkURL)
+		}
+
+		parsedURL, parseErr := url.Parse(checkURL)
+		if parseErr != nil {
+			fmt.Printf("%s Invalid URL: %v\n", logPrefix, parseErr)
+			continue
+		}
+
+		hostIsIP := isIPAddress(parsedURL.Hostname())
+		var isOnline bool
+
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+
+		req, err := http.NewRequestWithContext(ctx, "GET", checkURL, nil)
+		if err != nil {
+			fmt.Printf("%s Request creation failed: %v\n", logPrefix, err)
+			continue
+		}
+
+		resp, err := client.Do(req)
+		if err == nil {
+			defer resp.Body.Close()
+			isOnline = resp.StatusCode >= 200 && resp.StatusCode < 400
+			fmt.Printf("%s Response status: %d\n", logPrefix, resp.StatusCode)
+		} else {
+			fmt.Printf("%s Connection error: %v\n", logPrefix, err)
+
+			if hostIsIP {
+				var urlErr *url.Error
+				if errors.As(err, &urlErr) {
+					var certErr x509.HostnameError
+					var unknownAuthErr x509.UnknownAuthorityError
+					if errors.As(urlErr.Err, &certErr) || errors.As(urlErr.Err, &unknownAuthErr) {
+						fmt.Printf("%s Ignoring TLS error for IP, marking as online\n", logPrefix)
+						isOnline = true
+					}
+				}
+			}
+		}
+
+		if isOnline != app.Online {
+			status := "offline"
+			if isOnline {
+				status = "online"
+			}
+
+			message := strings.ReplaceAll(notificationTemplate, "!name", app.Name)
+			message = strings.ReplaceAll(message, "!url", app.PublicURL)
+			message = strings.ReplaceAll(message, "!status", status)
+
+			notifSender.SendNotifications(message)
+		}
+
+		// Update application status in database
+		updateApplicationStatus(db, app.ID, isOnline)
+
+		// Add entry to uptime history
+		addUptimeHistoryEntry(db, app.ID, isOnline)
+	}
+}
+
+// Helper function to update application status
+func updateApplicationStatus(db *sql.DB, appID int, online bool) {
+	dbCtx, dbCancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer dbCancel()
+
+	_, err := db.ExecContext(dbCtx,
+		`UPDATE application SET online = $1 WHERE id = $2`,
+		online, appID,
+	)
+	if err != nil {
+		fmt.Printf("DB update failed for app ID %d: %v\n", appID, err)
+	}
+}
+
+// Helper function to add uptime history entry
+func addUptimeHistoryEntry(db *sql.DB, appID int, online bool) {
+	dbCtx, dbCancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer dbCancel()
+
+	_, err := db.ExecContext(dbCtx,
+		`INSERT INTO uptime_history("applicationId", online, "createdAt") VALUES ($1, $2, now())`,
+		appID, online,
+	)
+	if err != nil {
+		fmt.Printf("History insert failed for app ID %d: %v\n", appID, err)
+	}
+}
+
+// Helper function to check if a host is an IP address
+func isIPAddress(host string) bool {
+	ip := net.ParseIP(host)
+	return ip != nil
+}