Design+messaging+database schema
- messages
- to_id, to_type (user or guest)
- from_id, from_type (user or guest)
- message
- created_at
- to_id, to_type (user or guest)
- guests
- ip_address
- name
- friends
- friend1_id (user)
- friend2_id (user)
- friend1_id (user)