From 48f008a8e2ef2b36280e7dcbfac89bbc18d503f8 Mon Sep 17 00:00:00 2001
From: George <57254463+zhoreeq@users.noreply.github.com>
Date: Mon, 6 Jul 2020 09:14:34 -0400
Subject: [PATCH] Implement Core.RemovePeer method (#699) (#709)

Co-authored-by: George <zhoreeq@users.noreply.github.com>
---
 src/admin/admin.go   | 27 ++++++++++++++++++++++++---
 src/yggdrasil/api.go | 29 ++++++++++++++++++++++++-----
 2 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/src/admin/admin.go b/src/admin/admin.go
index 8028bcc..5ea5ab8 100644
--- a/src/admin/admin.go
+++ b/src/admin/admin.go
@@ -189,22 +189,43 @@ func (a *AdminSocket) SetupAdminHandlers(na *AdminSocket) {
 			}, errors.New("Failed to add peer")
 		}
 	})
-	a.AddHandler("removePeer", []string{"port"}, func(in Info) (Info, error) {
+	a.AddHandler("disconnectPeer", []string{"port"}, func(in Info) (Info, error) {
 		port, err := strconv.ParseInt(fmt.Sprint(in["port"]), 10, 64)
 		if err != nil {
 			return Info{}, err
 		}
 		if a.core.DisconnectPeer(uint64(port)) == nil {
 			return Info{
-				"removed": []string{
+				"disconnected": []string{
 					fmt.Sprint(port),
 				},
 			}, nil
 		} else {
 			return Info{
-				"not_removed": []string{
+				"not_disconnected": []string{
 					fmt.Sprint(port),
 				},
+			}, errors.New("Failed to disconnect peer")
+		}
+	})
+	a.AddHandler("removePeer", []string{"uri", "[interface]"}, func(in Info) (Info, error) {
+		// Set sane defaults
+		intf := ""
+		// Has interface been specified?
+		if itf, ok := in["interface"]; ok {
+			intf = itf.(string)
+		}
+		if a.core.RemovePeer(in["uri"].(string), intf) == nil {
+			return Info{
+				"removed": []string{
+					in["uri"].(string),
+				},
+			}, nil
+		} else {
+			return Info{
+				"not_removed": []string{
+					in["uri"].(string),
+				},
 			}, errors.New("Failed to remove peer")
 		}
 	})
diff --git a/src/yggdrasil/api.go b/src/yggdrasil/api.go
index 82d0aa9..be905cb 100644
--- a/src/yggdrasil/api.go
+++ b/src/yggdrasil/api.go
@@ -468,12 +468,31 @@ func (c *Core) AddPeer(addr string, sintf string) error {
 	return nil
 }
 
-// RemovePeer is not implemented yet.
 func (c *Core) RemovePeer(addr string, sintf string) error {
-	// TODO: Implement a reverse of AddPeer, where we look up the port number
-	// based on the addr and sintf, disconnect it and then remove it from the
-	// peers list so we don't reconnect to it later
-	return errors.New("not implemented")
+	if sintf == "" {
+		for i, peer := range c.config.Current.Peers {
+			if peer == addr {
+				c.config.Current.Peers = append(c.config.Current.Peers[:i], c.config.Current.Peers[i+1:]...)
+				break
+			}
+		}
+	} else if _, ok := c.config.Current.InterfacePeers[sintf]; ok {
+		for i, peer := range c.config.Current.InterfacePeers[sintf] {
+			if peer == addr {
+				c.config.Current.InterfacePeers[sintf] = append(c.config.Current.InterfacePeers[sintf][:i], c.config.Current.InterfacePeers[sintf][i+1:]...)
+				break
+			}
+		}
+	}
+
+	ports := c.peers.ports.Load().(map[switchPort]*peer)
+	for p, peer := range ports {
+		if addr == peer.intf.name {
+			c.peers.removePeer(p)
+		}
+	}
+
+	return nil
 }
 
 // CallPeer calls a peer once. This should be specified in the peer URI format,