help command

1 files changed, 39 insertions, 4 deletions

diff --git a/client/command.go b/client/command.go
index 6727114..4d0d5c1 100644
--- a/client/command.go
+++ b/client/command.go
@@ -50,23 +50,29 @@ func (a *application) doCommand(command string, args []string, text string) {
 	if !a.connected {
 		return
 	}
-	argN := func(n int) {
+	argN := func(n int) bool {
 		if len(args) != n {
 			a.cmdWindow.err(
 				"%s: expected %d arguments, was %d", command, n, len(args),
 			)
+			return false
 		}
+		return true
 	}
 	switch command {
 	case "nick":
 		a.setNick(text)
 	case "join":
-		argN(1)
+		if !argN(1) {
+			break
+		}
 		if a.authenticated {
 			a.join(args[0])
 		}
 	case "leave":
-		argN(0)
+		if !argN(0) {
+			break
+		}
 		win := a.windowCache.Get(a.currentWindow)
 		switch win.(type) {
 		case *channelWindow:
@@ -74,10 +80,39 @@ func (a *application) doCommand(command string, args []string, text string) {
 		}
 		a.currentWindow = cmdWindowLocation {}
 	case "create":
-		argN(1)
+		if !argN(1) {
+			break
+		}
 		if a.authenticated {
 			a.createChannel(args[0])
 		}
+	case "help":
+		var (
+			hm helpMsg
+			ok bool
+			cmd string
+		)
+		if len(args) == 0 {
+			hm, ok = getHelp("")
+		} else {
+			if !argN(1) {
+				break
+			}
+			cmd = args[0]
+			if cmd[0] == '/' {
+				if len(cmd) > 1 {
+					cmd = cmd[1:]
+				} else {
+					cmd = ""
+				}
+			}
+			hm, ok = getHelp(cmd)
+		}
+		if !ok {
+			a.cmdWindow.err("unknown command: /" + cmd)
+		} else {
+			a.cmdWindow.buf.Add(hm)
+		}
 	case "quit":
 		a.quit = true
 	default: