capability: Add invite-notify

CHANGELOG.md

@@ -14,7 +14,7 @@ Improved compatibility, more features, etc.
 ### Added
 * Added integrated help (with the `/HELP` command).
 * Added support for IRCv3.2 [capability negotiation](http://ircv3.net/specs/core/capability-negotiation-3.2.html) including CAP values.
-* Added support for IRCv3 capability [`account-notify`](http://ircv3.net/specs/extensions/account-notify-3.1.html), [`sasl`](http://ircv3.net/specs/extensions/sasl-3.2.html), and draft capability [`message-tags`](http://ircv3.net/specs/core/message-tags-3.3.html) as `draft/message-tags`.
+* Added support for IRCv3 capability [`account-notify`](http://ircv3.net/specs/extensions/account-notify-3.1.html), [`invite-notify`](http://ircv3.net/specs/extensions/invite-notify-3.2.html), [`sasl`](http://ircv3.net/specs/extensions/sasl-3.2.html), and draft capability [`message-tags`](http://ircv3.net/specs/core/message-tags-3.3.html) as `draft/message-tags`.
 
 ### Changed
 * Casemapping changed from custom unicode mapping to preliminary [rfc7700](https://github.com/ircv3/ircv3-specifications/pull/272) mapping.

irc/capability.go

@@ -18,6 +18,7 @@ const (
 	AccountNotify   Capability = "account-notify"
 	AwayNotify      Capability = "away-notify"
 	ExtendedJoin    Capability = "extended-join"
+	InviteNotify    Capability = "invite-notify"
 	MessageTags     Capability = "draft/message-tags"
 	MultiPrefix     Capability = "multi-prefix"
 	SASL            Capability = "sasl"
@@ -31,6 +32,7 @@ var (
 		AccountNotify:   true,
 		AwayNotify:      true,
 		ExtendedJoin:    true,
+		InviteNotify:    true,
 		MessageTags:     true,
 		MultiPrefix:     true,
 		SASL:            true,

irc/channel.go

@@ -91,8 +91,14 @@ func (channel *Channel) Names(client *Client) {
 	client.Send(nil, client.server.name, RPL_ENDOFNAMES, client.nick, channel.name, "End of NAMES list")
 }
 
+// ClientIsHalfOp returns whether client is at least a halfop.
+func (channel *Channel) ClientIsHalfOp(client *Client) bool {
+	return client.flags[Operator] || channel.members.HasMode(client, Halfop) || channel.members.HasMode(client, ChannelOperator) || channel.members.HasMode(client, ChannelAdmin) || channel.members.HasMode(client, ChannelFounder)
+}
+
+// ClientIsOperator returns whether client is at least a chanop.
 func (channel *Channel) ClientIsOperator(client *Client) bool {
-	return client.flags[Operator] || channel.members.HasMode(client, ChannelOperator)
+	return client.flags[Operator] || channel.members.HasMode(client, ChannelOperator) || channel.members.HasMode(client, ChannelAdmin) || channel.members.HasMode(client, ChannelFounder)
 }
 
 // Prefixes returns a list of prefixes for the given set of channel modes.
@@ -485,10 +491,18 @@ func (channel *Channel) Invite(invitee *Client, inviter *Client) {
 		return
 	}
 
+	//TODO(dan): handle this more nicely, keep a list of last X invited channels on invitee rather than explicitly modifying the invite list?
 	if channel.flags[InviteOnly] {
 		channel.lists[InviteMask].Add(invitee.UserHost())
 	}
 
+	// send invite-notify
+	for member := range channel.members {
+		if member.capabilities[InviteNotify] && member != inviter && member != invitee && channel.ClientIsHalfOp(member) {
+			member.Send(nil, inviter.nickMaskString, "INVITE", invitee.nick, channel.name)
+		}
+	}
+
 	//TODO(dan): should inviter.server.name here be inviter.nickMaskString ?
 	inviter.Send(nil, inviter.server.name, RPL_INVITING, invitee.nick, channel.name)
 	invitee.Send(nil, inviter.nickMaskString, "INVITE", invitee.nick, channel.name)