Simple Mob Spawn Eggs

So I am currently working on a CTF server, where there are two teams, red and blue.

Don't worry, all of the mechanics of that are being covered.

I need a plugin that makes it so that when the player presses the button to join that team, I can write in the command block:

/monster red @p
(if its the red team)
and /monster blue @p
(if it's the blue team.)
There is a class in the game that can spawn monsters. I do not want the monsters they spawn to attack their own team, and if possible, not burn in the day light. (- not mandatory)
So for example, Bob joins the red team, command block runs /monster red (bob)
Joe joins the blue team, (command block runs /monster blue (joe))
Bob selects the monster tamer class.
Bill join the red team.
Any mobs spawned by Bob or anyone on the red team will only attack people on the blue team. (Joe in the example)

Mobs are spawned in the monster eggs given to them by, again, a command block that gives them their kit.

When the game ends and they pick their team again, it should reset their /monster (blue/red) @p
to the new team they pick.

No permissions, command run by a command block.

 

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