map restart needs to transfer enderchest but not players

hey there i want to change my map from my server.
but now the problem is that i want them to take 1 inventory to the new map.

when i leave the player files they spawn where they disconnected rendering the whole server again.

what i want is that all players reconnect in spawn. and are able to keep their enderchest. or keep 1 inventory?
or the possibility to mass change their current location so they spawn in spawn when they logon,

is there any plugin. or tool or modification or script
something that can help me.?

thanks in advance

 

mmuziek
Go here if you know how to actually code: here
Or if you know python (might be outdated): here

 

thats a bummer i dont know both. i never used python. nor i know how to code stuff
except for a little vb.net