[Role permission] Enable to load previous chats from different department

[SonnySVK]

Hello,

I'm facing this issue/request:
We have 3 departments per cities, let's say Tokyo, Madrid and New York, which covers almost all timezones (during work times). Client start to chat with operator assigned to Madrid, finish the chat. Then he start to chat again, but now with New York operator. New York operator want's to load previous client conversation, but due limitation that he is only under New York department, "Chat messages were hidden. You do not have permission to access department" displays.

I want to add new permission like enable to load previous conversation from all departments.

For now, I need to make an override to erLhcoreClassChat class and in hasAccessToRead function remove in_array($chat->dep_id,$userDepartaments) condition.

For now, it's working, but I want to make it more elegant via permission or you need to include it to new release?

Thank you

[remdex]

Why not just assign department in read only permission?