@startuml

class ConcertInfo{
genre: str
when: DateTime
event_name: str
expected_payment: int
description: str
created: DateTime
updated: DateTime
}

class User{
username: str
password: str
email: str
first_name: str
last_name: str
user_type: str
tel_number: str
created: DateTime
updated: DateTime
}

class Decision{
reason: str
}

enum Status{
ACTIVE
DELETED
TAKEN
}

class InternalEvent{
song_list: str
needed_stuff: str
owned_stuff: str
instrumental_link: url
comments: str
created: DateTime
updated: DateTime
}

class Event{
poster: file
ticket_price: float
active: bool
is_filled: bool
created: DateTime
updated: DateTime
}

class Comment{
body: str
username: str
active: bool
created: DateTime
updated: DateTime
}

class InternalEventUpdate << View >>{
get(internal_event_id)
form_valid()
}
class Negotiate << View >>{
post(concert_times_id, price)
}
class Decline << View >>{
post(concert_times_id)
form_valid()
}
class Accept << View >>{
post(concert_times_id, user_id)
create_events(concert_times_id)
}
class BandUpdate << View >>{
get(user_id)
form_valid()
}

Negotiate ..> ConcertInfo
Accept ..> ConcertInfo
Decline ..> ConcertInfo
BandUpdate ..> User
InternalEventUpdate ..> InternalEvent

ConcertInfo o-- User
ConcertInfo *-- Decision
ConcertInfo *-- Status
ConcertInfo *-- InternalEvent
ConcertInfo *-- Event
User *-- Decision
Event *-- Comment

@enduml