An blog system with 3 types of logged user:
-Admin he can:
-create post,
-create comment
-manage all posts,
-manage all comments,
-manage users (delets or change user types: bloger/reader)
-Bloger he can:
-create posts,
-create comments,
-manage his posts,
-manage his comments
-Reader he can:
-create comments,
-manage his comments