Add base interface and ufw realisation

internal/blocker/interface.go

@@ -0,0 +1,8 @@
+package blocker
+
+type BlockerEngine interface {
+	Ban(ip string) error
+	Unban(ip string) error
+	IsBanned(ip string) (bool, error)
+	Flush() error
+}

internal/blocker/ufw.go

@@ -0,0 +1,28 @@
+package blocker
+
+import (
+	"github.com/d3m0k1d/BanForge/internal/logger"
+	"os/exec"
+)
+
+type Ufw struct {
+	logger *logger.Logger
+}
+
+func NewUfw(logger *logger.Logger) *Ufw {
+	return &Ufw{
+		logger: logger,
+	}
+}
+
+func (ufw *Ufw) Ban(ip string) error {
+	cmd := exec.Command("sudo", "ufw", "--force", "deny", "from", ip)
+	ufw.logger.Info("Banning " + ip)
+	return cmd.Run()
+}
+
+func (ufw *Ufw) Unban(ip string) error {
+	cmd := exec.Command("sudo", "ufw", "--force", "delete", "deny", "from", ip)
+	ufw.logger.Info("Unbanning " + ip)
+	return cmd.Run()
+}