Add +M (only registered/voice can speak) chanmode.

Add chanmode preventing speech to error message.

Fixes #1182.

docs/MANUAL.md

@@ -654,6 +654,18 @@ To unset this mode:
 
     /MODE #test -R
 
+### +M - Only Registered Users Can Speak
+
+If this mode is set, only users that have logged into an account will be able to speak on the channel. If this is set and a regular, un-logged-in user tries to speak, they will be rejected. Users who have been voiced (+v) are excepted from this restriction.
+
+To set this mode:
+
+    /MODE #test +M
+
+To unset this mode:
+
+    /MODE #test -M
+
 ### +s - Secret
 
 If this mode is set, it means that your channel should be marked as 'secret'. Your channel won't show up in `/LIST` or `/WHOIS`, and non-members won't be able to see its members with `/NAMES` or `/WHO`.

irc/channel.go

@@ -1188,22 +1188,25 @@ func (channel *Channel) SetTopic(client *Client, topic string, rb *ResponseBuffe
 	channel.MarkDirty(IncludeTopic)
 }
 
-// CanSpeak returns true if the client can speak on this channel.
-func (channel *Channel) CanSpeak(client *Client) bool {
+// CanSpeak returns true if the client can speak on this channel, otherwise it returns false along with the channel mode preventing the client from speaking.
+func (channel *Channel) CanSpeak(client *Client) (bool, modes.Mode) {
 	channel.stateMutex.RLock()
 	defer channel.stateMutex.RUnlock()
 
 	_, hasClient := channel.members[client]
 	if channel.flags.HasMode(modes.NoOutside) && !hasClient {
-		return false
+		return false, modes.NoOutside
 	}
 	if channel.flags.HasMode(modes.Moderated) && !channel.ClientIsAtLeast(client, modes.Voice) {
-		return false
+		return false, modes.Moderated
 	}
 	if channel.flags.HasMode(modes.RegisteredOnly) && client.Account() == "" {
-		return false
+		return false, modes.RegisteredOnly
 	}
-	return true
+	if channel.flags.HasMode(modes.RegisteredOnlySpeak) && client.Account() == "" && !channel.ClientIsAtLeast(client, modes.Voice) {
+		return false, modes.RegisteredOnlySpeak
+	}
+	return true, modes.Mode('?')
 }
 
 func msgCommandToHistType(command string) (history.ItemType, error) {
@@ -1225,9 +1228,9 @@ func (channel *Channel) SendSplitMessage(command string, minPrefixMode modes.Mod
 		return
 	}
 
-	if !channel.CanSpeak(client) {
+	if canSpeak, mode := channel.CanSpeak(client); !canSpeak {
 		if histType != history.Notice {
-			rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, client.Nick(), channel.Name(), client.t("Cannot send to channel"))
+			rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, client.Nick(), channel.Name(), fmt.Sprintf(client.t("Cannot send to channel (+%s)"), mode))
 		}
 		return
 	}

irc/config.go

@@ -1250,7 +1250,7 @@ func (config *Config) generateISupport() (err error) {
 	isupport.Add("BOT", "B")
 	isupport.Add("CASEMAPPING", "ascii")
 	isupport.Add("CHANLIMIT", fmt.Sprintf("%s:%d", chanTypes, config.Channels.MaxChannelsPerClient))
-	isupport.Add("CHANMODES", strings.Join([]string{modes.Modes{modes.BanMask, modes.ExceptMask, modes.InviteMask}.String(), modes.Modes{modes.Key}.String(), modes.Modes{modes.UserLimit}.String(), modes.Modes{modes.InviteOnly, modes.Moderated, modes.NoOutside, modes.OpOnlyTopic, modes.ChanRoleplaying, modes.Secret, modes.NoCTCP, modes.RegisteredOnly}.String()}, ","))
+	isupport.Add("CHANMODES", strings.Join([]string{modes.Modes{modes.BanMask, modes.ExceptMask, modes.InviteMask}.String(), modes.Modes{modes.Key}.String(), modes.Modes{modes.UserLimit}.String(), modes.Modes{modes.InviteOnly, modes.Moderated, modes.NoOutside, modes.OpOnlyTopic, modes.ChanRoleplaying, modes.Secret, modes.NoCTCP, modes.RegisteredOnly, modes.RegisteredOnlySpeak}.String()}, ","))
 	if config.History.Enabled && config.History.ChathistoryMax > 0 {
 		isupport.Add("draft/CHATHISTORY", strconv.Itoa(config.History.ChathistoryMax))
 	}

irc/help.go

@@ -49,6 +49,7 @@ Oragono supports the following channel modes:
   +n  |  No-outside-messages mode, only users that are on the channel can send
       |  messages to it.
   +R  |  Only registered users can join the channel.
+  +M  |  Only registered or voiced users can speak in the channel.
   +s  |  Secret mode, channel won't show up in /LIST or whois replies.
   +t  |  Only channel opers can modify the topic.
   +E  |  Roleplaying commands are enabled in the channel.

irc/modes.go

@@ -271,7 +271,7 @@ func (channel *Channel) ApplyChannelModeChanges(client *Client, isSamode bool, c
 				applied = append(applied, change)
 			}
 
-		case modes.InviteOnly, modes.Moderated, modes.NoOutside, modes.OpOnlyTopic, modes.RegisteredOnly, modes.Secret, modes.ChanRoleplaying, modes.NoCTCP:
+		case modes.InviteOnly, modes.Moderated, modes.NoOutside, modes.OpOnlyTopic, modes.RegisteredOnly, modes.Secret, modes.ChanRoleplaying, modes.NoCTCP, modes.RegisteredOnlySpeak:
 			if change.Op == modes.List {
 				continue
 			}

irc/modes/modes.go

@@ -21,8 +21,8 @@ var (
 	// SupportedChannelModes are the channel modes that we support.
 	SupportedChannelModes = Modes{
 		BanMask, ChanRoleplaying, ExceptMask, InviteMask, InviteOnly, Key,
-		Moderated, NoOutside, OpOnlyTopic, RegisteredOnly, Secret, UserLimit,
-		NoCTCP,
+		Moderated, NoOutside, OpOnlyTopic, RegisteredOnly, RegisteredOnlySpeak,
+		Secret, UserLimit, NoCTCP,
 	}
 )
 
@@ -122,9 +122,10 @@ const (
 	NoOutside       Mode = 'n' // flag
 	OpOnlyTopic     Mode = 't' // flag
 	// RegisteredOnly mode is reused here from umode definition
-	Secret    Mode = 's' // flag
-	UserLimit Mode = 'l' // flag arg
-	NoCTCP    Mode = 'C' // flag
+	RegisteredOnlySpeak Mode = 'M' // flag
+	Secret              Mode = 's' // flag
+	UserLimit           Mode = 'l' // flag arg
+	NoCTCP              Mode = 'C' // flag
 )
 
 var (

irc/roleplay.go

@@ -74,8 +74,8 @@ func sendRoleplayMessage(server *Server, client *Client, source string, targetSt
 		}
 
 		targetString = channel.Name()
-		if !channel.CanSpeak(client) {
-			rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, targetString, client.t("Cannot send to channel"))
+		if canSpeak, mode := channel.CanSpeak(client); !canSpeak {
+			rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, targetString, fmt.Sprintf(client.t("Cannot send to channel (+%s)"), mode))
 			return
 		}