retain deleted channel names

2 files changed, 35 insertions, 1 deletions

diff --git a/server/channel/channel.go b/server/channel/channel.go
index 50b43b6..9a3134e 100644
--- a/server/channel/channel.go
+++ b/server/channel/channel.go
@@ -10,6 +10,7 @@ import (
 type ChannelStore struct {
 	world *object.World
 	byName map[string]*Channel
+	deleted map[string]Tombstone
 }
 
 type Channel struct {
@@ -23,8 +24,14 @@ type Channel struct {
 	Stream session.Stream
 }
 
+type Tombstone struct {
+	name string
+}
+
 func NewStore(world *object.World) *ChannelStore {
-	return &ChannelStore {world, make(map[string]*Channel)}
+	return &ChannelStore {
+		world, make(map[string]*Channel), make(map[string]Tombstone),
+	}
 }
 
 func (cs *ChannelStore) CreateChannel(name string) (*Channel, *proto.Fail) {
@@ -139,6 +146,10 @@ func (c *Channel) Delete() {
 	}
 	delete(c.store.byName, c.name)
 	c.store.world.RemoveObject(c.id)
+	
+	deleted := Tombstone {c.name}
+	c.store.deleted[c.id] = deleted
+	c.store.world.PutObject(c.id, deleted)
 }
 
 func (c *Channel) GetInfo() proto.Object {
@@ -146,3 +157,9 @@ func (c *Channel) GetInfo() proto.Object {
 		"channel", c.id, map[string]string {"": c.name},
 	}
 }
+
+func (t Tombstone) GetInfo() proto.Object {
+	return proto.Object {
+		"deleted", "", map[string]string {"": t.name},
+	}
+}
diff --git a/server/channel/command.go b/server/channel/command.go
index 94cf38f..5190efe 100644
--- a/server/channel/command.go
+++ b/server/channel/command.go
@@ -251,3 +251,20 @@ func (c *Channel) SendRequest(r session.Request) {
 		r.ReplyInvalid()
 	}
 }
+
+func (t Tombstone) SendRequest(r session.Request) {
+	switch r.Cmd.Kind {
+
+	case "update":
+		r.Reply(proto.Fail{"bad-target", "", nil}.Cmd())
+
+	case "i", "s":
+		r.Reply(proto.NewCmd("i", "", t.GetInfo()))
+
+	case "u":
+		r.ReplyOk()
+
+	default:
+		r.ReplyInvalid()
+	}
+}