Manage User Access Permissions for SharePoint Documents

Hi Everyone,

We're using our SharePoint site as an organisation wide document library, and have given key staff members from each department edit permissions for specific folders. However, now that the folder structure has grown significantly, keeping track of who has access to what folders is proving difficult.

Is there a script that will tell me who has edit permissions for each folder on our site, rather than having to check each folder one by one? I'm also looking for a script that would let me remove edit permissions of a user from all folders, so that way, if a staff member leaves, I can simply run this script and remove all their access?