Handle nickname changes.

FossilOrigin-Name: 7b1c2b91a430c3744d650d3305e867008bc8173de9ed6fdc208b4d7b1f736da9

src/IRCConnection.h

@@ -43,6 +43,9 @@
 	didSeeUser: (IRCUser*)user
       leaveChannel: (IRCChannel*)channel
 	withReason: (OFString*)reason;
+- (void)connection: (IRCConnection*)connection
+        didSeeUser: (IRCUser*)user
+  changeNicknameTo: (OFString*)nickname;
 - (void)connection: (IRCConnection*)connection
     didSeeUserQuit: (IRCUser*)user
 	withReason: (OFString*)reason;

src/IRCConnection.m

@@ -272,6 +272,26 @@
 			continue;
 		}
 
+		/* NICK */
+		if ([action isEqual: @"NICK"] && split.count == 3) {
+			OFString *who = [split objectAtIndex: 0];
+			OFString *newNickname = [split objectAtIndex: 2];
+			IRCUser *user;
+
+			who = [who substringWithRange:
+			    of_range(1, who.length - 1)];
+			newNickname = [newNickname substringWithRange:
+			    of_range(1, newNickname.length - 1)];
+
+			user = [IRCUser IRCUserWithString: who];
+
+			if ([delegate respondsToSelector:
+			    @selector(connection:didSeeUser:changeNicknameTo:)])
+				[delegate connection: self
+					  didSeeUser: user
+				    changeNicknameTo: newNickname];
+		}
+
 		/* PRIVMSG */
 		if ([action isEqual: @"PRIVMSG"] && split.count >= 4) {
 			OFString *from = [split objectAtIndex: 0];

tests/test.m

@@ -87,6 +87,13 @@ OF_APPLICATION_DELEGATE(TestApp)
 	of_log(@"%@ quit (%@).", user, reason);
 }
 
+- (void)connection: (IRCConnection*)connection
+	didSeeUser: (IRCUser*)user
+  changeNicknameTo: (OFString *)nickname
+{
+	of_log(@"%@ changed nick to %@.", user, nickname);
+}
+
 -  (void)connection: (IRCConnection*)connection
   didReceiveMessage: (OFString*)msg
 	   fromUser: (IRCUser*)user