daemon: use per-interface features

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

pkg/daemon/feature/hsync/handlers.go

@@ -0,0 +1,32 @@
+package hsync
+
+import (
+	"net"
+
+	"github.com/stv0g/cunicu/pkg/core"
+	"go.uber.org/zap"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+)
+
+func (hs *Interface) OnPeerAdded(p *core.Peer) {
+	if err := hs.Sync(); err != nil {
+		hs.logger.Error("Failed to update hosts file", zap.Error(err))
+	}
+
+	p.OnModified(hs)
+}
+
+func (hs *Interface) OnPeerRemoved(p *core.Peer) {
+	if err := hs.Sync(); err != nil {
+		hs.logger.Error("Failed to update hosts file", zap.Error(err))
+	}
+}
+
+func (hs *Interface) OnPeerModified(p *core.Peer, old *wgtypes.Peer, m core.PeerModifier, ipsAdded, ipsRemoved []net.IPNet) {
+	// Only update if the name has changed
+	if m.Is(core.PeerModifiedName) {
+		if err := hs.Sync(); err != nil {
+			hs.logger.Error("Failed to update hosts file", zap.Error(err))
+		}
+	}
+}