From 6a2cbdffd0576418edf64fc30816fb85d0bd48cb Mon Sep 17 00:00:00 2001
From: Alejandro Mery <amery@jpi.io>
Date: Fri, 25 Aug 2023 16:04:01 +0000
Subject: [PATCH] WIP

Signed-off-by: Alejandro Mery <amery@jpi.io>
---
 pkg/zones/machine.go       | 18 +++++++++++++
 pkg/zones/machine_rings.go | 54 ++++++++++++++++++++++++++++++++++++++
 pkg/zones/zones.go         | 25 ++++++++++++++++++
 3 files changed, 97 insertions(+)

diff --git a/pkg/zones/machine.go b/pkg/zones/machine.go
index f9ceefe..47aca68 100644
--- a/pkg/zones/machine.go
+++ b/pkg/zones/machine.go
@@ -39,6 +39,24 @@ func (m *Machine) IsGateway() bool {
 	return ok
 }
 
+// SetGateway enables/disables a Machine ring0 integration
+func (m *Machine) SetGateway(enabled bool) error {
+	ri, found := m.getRingInfo(0)
+	switch {
+	case !found && !enabled:
+		return nil
+	case !found:
+		var err error
+
+		if ri, err = m.createRingInfo(0, false); err != nil {
+			return err
+		}
+	}
+
+	ri.Enabled = enabled
+	return m.syncRingConfig(0)
+}
+
 func (m *Machine) getPeerByName(name string) (*Machine, bool) {
 	return m.zone.zones.GetMachineByName(name)
 }
diff --git a/pkg/zones/machine_rings.go b/pkg/zones/machine_rings.go
index 1e950e8..75ab2bf 100644
--- a/pkg/zones/machine_rings.go
+++ b/pkg/zones/machine_rings.go
@@ -261,3 +261,57 @@ func (m *Machine) RemoveWireguardConfig(ring int) error {
 
 	return err
 }
+
+func (*Machine) syncRingConfig(_ int) error {
+	// _, err := m.getRingNodes(ring)
+	return nil
+}
+
+func (m *Machine) createRingInfo(ring int, enabled bool) (*RingInfo, error) {
+	keys, err := wireguard.NewKeyPair()
+	if err != nil {
+		return nil, err
+	}
+
+	ri := &RingInfo{
+		Ring:    ring,
+		Enabled: enabled,
+		Keys:    keys,
+	}
+
+	err = m.applyRingInfo(ring, ri)
+	if err != nil {
+		return nil, err
+	}
+
+	return ri, nil
+}
+
+func (m *Machine) writeRingInfo(ri *RingInfo) error {
+	var err error
+
+	if m == nil || ri == nil {
+		return fs.ErrInvalid
+	}
+
+	err = m.WriteWireguardKeys(ri.Ring)
+	if err != nil {
+		return err
+	}
+
+	if !ri.Enabled {
+		return m.RemoveWireguardConfig(ri.Ring)
+	}
+
+	return m.writeRingInfoConf(ri.Ring, ri.Keys.PrivateKey)
+}
+
+func (m *Machine) writeRingInfoConf(ring int, _ wireguard.PrivateKey) error {
+	f, err := m.CreateTruncFile("wg%v.conf", ring)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	return nil
+}
diff --git a/pkg/zones/zones.go b/pkg/zones/zones.go
index 92489c4..d300d59 100644
--- a/pkg/zones/zones.go
+++ b/pkg/zones/zones.go
@@ -34,6 +34,31 @@ func (z *Zone) ForEachMachine(fn func(*Machine) bool) {
 	}
 }
 
+// SetGateway configures a machine to be the zone's ring0 gateway
+func (z *Zone) SetGateway(gatewayID int, enabled bool) error {
+	var err error
+	var found bool
+
+	z.ForEachMachine(func(p *Machine) bool {
+		if p.ID == gatewayID {
+			found = true
+			err = p.SetGateway(enabled)
+
+			return true
+		}
+		return false
+	})
+
+	switch {
+	case err != nil:
+		return err
+	case !found:
+		return fs.ErrNotExist
+	default:
+		return nil
+	}
+}
+
 // Zones represents all zones in a cluster
 type Zones struct {
 	dir      fs.FS