ForumMembership.java

package com.wavii.model;

import com.wavii.model.enums.ForumMembershipRole;
import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.EnumType;
import jakarta.persistence.Enumerated;
import jakarta.persistence.FetchType;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.PrePersist;
import jakarta.persistence.Table;
import jakarta.persistence.UniqueConstraint;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDateTime;
import java.util.UUID;

/**
 * Entidad que vincula a un usuario con un foro.
 * Define el rol del usuario en la comunidad (MEMBER, ADMIN, OWNER) y la fecha de unión.
 */
@Entity
@Table(
        name = "forum_memberships",
        uniqueConstraints = @UniqueConstraint(columnNames = {"forum_id", "user_id"})
)
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class ForumMembership {

    @Id
    @GeneratedValue(strategy = GenerationType.UUID)
    private UUID id;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "forum_id", nullable = false)
    private Forum forum;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_id", nullable = false)
    private User user;

    @Enumerated(EnumType.STRING)
    @Column(nullable = false)
    @Builder.Default
    private ForumMembershipRole role = ForumMembershipRole.MEMBER;

    @Column(nullable = false, updatable = false)
    private LocalDateTime joinedAt;

    @PrePersist
    protected void onCreate() {
        joinedAt = LocalDateTime.now();
    }
}