Community class diagram

Class Diagram Community API

    classDiagram
    %% Define Packages
    class nl.hva.elections.backend.api.model {
    }

    class nl.hva.elections.backend.api.service {
    }

    class nl.hva.elections.backend.api.controller {
    }

    %% Model Classes
    nl.hva.elections.backend.api.model.Friends {
    Long id
    User user1
    User user2
    +getId(): Long
    +setId(Long id)
    +getUser1(): User
    +setUser1(User user1)
    +getUser2(): User
    +setUser2(User user2)
    }

    nl.hva.elections.backend.api.model.GroupChat {
    Long id
    String name
    +getId(): Long
    +setId(Long id)
    +getName(): String
    +setName(String name)
    }

    nl.hva.elections.backend.api.model.Message {
    Long id
    String text
    Long userId
    Long groupId
    LocalDateTime dateCreated
    +getId(): Long
    +setId(Long id)
    +getText(): String
    +setText(String text)
    +getUserId(): Long
    +setUserId(Long userId)
    +getGroupId(): Long
    +setGroupId(Long groupId)
    +getDateCreated(): LocalDateTime
    }

    nl.hva.elections.backend.api.model.User {
    Long id
    String username
    String email
    String password
    String role
    LocalDateTime createTime
    +getId(): Long
    +setId(Long id)
    +getUsername(): String
    +setUsername(String username)
    +getEmail(): String
    +setEmail(String email)
    +getPassword(): String
    +setPassword(String password)
    +getRole(): String
    +setRole(String role)
    +getCreateTime(): LocalDateTime
    }

    nl.hva.elections.backend.api.model.UserHasGroup {
    Long id
    User user
    GroupChat groupChat
    +getId(): Long
    +setId(Long id)
    +getUser(): User
    +setUser(User user)
    +getGroupChat(): GroupChat
    +setGroupChat(GroupChat groupChat)
    }

    nl.hva.elections.backend.api.model.UserHasGroupId {
    Long userId
    Long groupId
    +getUserId(): Long
    +setUserId(Long userId)
    +getGroupId(): Long
    +setGroupId(Long groupId)
    }

    %% Associations
    Friends "1" --> "1" User : user1
    Friends "1" --> "1" User : user2
    UserHasGroup "1" --> "1" User
    UserHasGroup "1" --> "1" GroupChat
    Message "1" --> "1" GroupChat : groupId
    Message "1" --> "1" User : userId

    %% Service and Controller Stubs
    nl.hva.elections.backend.api.service.GroupChatService
    nl.hva.elections.backend.api.service.MessageService
    nl.hva.elections.backend.api.service.UserHasGroupService
    nl.hva.elections.backend.api.service.UserResultsService

    nl.hva.elections.backend.api.controller.GroupChatController
    nl.hva.elections.backend.api.controller.MessageController
    nl.hva.elections.backend.api.controller.UserHasGroupController
    nl.hva.elections.backend.api.controller.UserResultsController