From f0fc3b492cebd008cb01bb3b9ac48e178c167263 Mon Sep 17 00:00:00 2001
From: Jeremy Latt <jeremy.latt@gmail.com>
Date: Sun, 16 Feb 2014 23:51:27 -0800
Subject: [PATCH] list command

---
 irc/commands.go  | 18 ++++++++++++++++++
 irc/constants.go |  1 +
 irc/reply.go     |  9 +++++++++
 irc/server.go    | 31 +++++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+)

diff --git a/irc/commands.go b/irc/commands.go
index e546de88..0fc27c18 100644
--- a/irc/commands.go
+++ b/irc/commands.go
@@ -24,6 +24,7 @@ var (
 		ISON:    NewIsOnCommand,
 		JOIN:    NewJoinCommand,
 		KICK:    NewKickCommand,
+		LIST:    NewListCommand,
 		MODE:    NewModeCommand,
 		MOTD:    NewMOTDCommand,
 		NICK:    NewNickCommand,
@@ -778,3 +779,20 @@ func NewKickCommand(args []string) (editableCommand, error) {
 	}
 	return cmd, nil
 }
+
+type ListCommand struct {
+	BaseCommand
+	channels []string
+	target   string
+}
+
+func NewListCommand(args []string) (editableCommand, error) {
+	cmd := &ListCommand{}
+	if len(args) > 0 {
+		cmd.channels = strings.Split(args[0], ",")
+	}
+	if len(args) > 1 {
+		cmd.target = args[1]
+	}
+	return cmd, nil
+}
diff --git a/irc/constants.go b/irc/constants.go
index 2bd63fcc..df7deca5 100644
--- a/irc/constants.go
+++ b/irc/constants.go
@@ -31,6 +31,7 @@ const (
 	ISON    StringCode = "ISON"
 	JOIN    StringCode = "JOIN"
 	KICK    StringCode = "KICK"
+	LIST    StringCode = "LIST"
 	MODE    StringCode = "MODE"
 	MOTD    StringCode = "MOTD"
 	NICK    StringCode = "NICK"
diff --git a/irc/reply.go b/irc/reply.go
index 384d2070..87b73443 100644
--- a/irc/reply.go
+++ b/irc/reply.go
@@ -321,6 +321,15 @@ func RplMOTDEnd(server *Server) Reply {
 		":End of MOTD command")
 }
 
+func RplList(channel *Channel) Reply {
+	return NewNumericReply(channel.server, RPL_LIST, "%s %d :%s",
+		channel, len(channel.members), channel.topic)
+}
+
+func RplListEnd(server *Server) Reply {
+	return NewNumericReply(server, RPL_LISTEND, ":End of LIST")
+}
+
 //
 // errors (also numeric)
 //
diff --git a/irc/server.go b/irc/server.go
index d8d21e99..e84d727e 100644
--- a/irc/server.go
+++ b/irc/server.go
@@ -561,3 +561,34 @@ func (msg *KickCommand) HandleServer(server *Server) {
 		channel.Kick(client, target, msg.Comment())
 	}
 }
+
+func (msg *ListCommand) HandleServer(server *Server) {
+	client := msg.Client()
+
+	// TODO target server
+	if msg.target != "" {
+		client.Reply(ErrNoSuchServer(server, msg.target))
+		return
+	}
+
+	if len(msg.channels) == 0 {
+		for _, channel := range server.channels {
+			if channel.flags[Secret] || channel.flags[Private] {
+				continue
+			}
+			client.Reply(RplList(channel))
+		}
+	} else {
+		for _, chname := range msg.channels {
+			channel := server.channels[chname]
+			if channel == nil ||
+				channel.flags[Secret] ||
+				channel.flags[Private] {
+				client.Reply(ErrNoSuchChannel(server, chname))
+				continue
+			}
+			client.Reply(RplList(channel))
+		}
+	}
+	client.Reply(RplListEnd(server))
+}