USERHOST command

CHANGELOG.md

@@ -12,6 +12,7 @@ New release of Oragono!
 ### Security
  
 ### Added
+* Added `USERHOST` command (thanks @vegax87).
  
 ### Changed
  

irc/commands.go

@@ -238,6 +238,10 @@ var Commands = map[string]Command{
 		usablePreReg: true,
 		minParams:    4,
 	},
+	"USERHOST": {
+		handler:   userhostHandler,
+		minParams: 1,
+	},
 	"VERSION": {
 		handler:   versionHandler,
 		minParams: 0,

irc/help.go

@@ -370,6 +370,12 @@ For example:
 Used in connection registration, sets your username and realname to the given
 values (though your username may also be looked up with Ident).`,
 	},
+
+	"userhost": {
+		text: `Show the nick, user and host of a user. Normally only used by the client or in scripts.
+Note: if you are not an IRCOp then it will show a cloaked hostname if the user is +x (and it's not yourself). `,
+	},
+
 	"version": {
 		text: `VERSION [server]
 

irc/server.go

@@ -1848,3 +1848,21 @@ func lusersHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 	client.Send(nil, server.name, RPL_LUSERME, client.nick, fmt.Sprintf("I have %d clients and %d servers", totalcount, 1))
 	return false
 }
+
+func userhostHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
+	nickname := msg.Params[0]
+
+	casefoldedNickname, err := CasefoldName(nickname)
+	target := server.clients.Get(casefoldedNickname)
+	if err != nil || target == nil {
+		client.Send(nil, client.server.name, ERR_NOSUCHNICK, nickname, "No such nick")
+		return false
+	}
+
+	if target.flags[Away] {
+		client.Send(nil, client.server.name, RPL_USERHOST, client.nick, fmt.Sprintf(strings.TrimSpace("%s =- %s @ %s"), target.nick, target.username, target.hostname))
+	} else {
+		client.Send(nil, client.server.name, RPL_USERHOST, client.nick, fmt.Sprintf(strings.TrimSpace("%s =+ %s @ %s"), target.nick, target.username, target.hostname))
+	}
+	return false
+}