My English is not very good, but I hope I can express myself correctly.

I wanted to offer a new feature for the plugin, and it is to send messages to specific groups, if the group is not specified, then the message will be global.

For example:

Messages:
	global:
		- "blabla"
		- "blabla2"
		- "blabla3"

	vip:
		- "only vip"
		- "only vip2"
		- "only vip3"

  - Type: json
    Definition: json_vip
    Group: vip

If I understand that right, you want the following:

There is a list of message that everyone can see, but specific messages are only visible for different permissible groups.

Is that correct?

Si entiendo bien, quieres lo siguiente:

Hay una lista de mensajes que todo el mundo puede ver, pero los mensajes específicos solo son visibles para diferentes grupos permitidos.

¿Es eso correcto?

Yes!

Great! I will put this on my todo list.

I have started working on this and now there is a problem:

Grouping messages by permissible groups has a severe impact on the broadcasting algorithm. As of now, there is a list of messages, from which one is chosen and then broadcasted to everybody. By implementing your feature request I am not sure on how the broadcasting behavior should be changed.

If the messages are not chosen randomly, should I iterate through each permissible group individually - which would result in a large delay for other groups - or should the global group be broadcasted as usual with an extra message per permissible group?

Similar behavior would apply to randomly chosen messages. With each iteration, should a random message be chosen from one group or per group?