ForumLike.java

package com.wavii.model;

import jakarta.persistence.Entity;
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 representa un "me gusta" dado por un usuario a un foro.
 * Incluye una restricción de unicidad para evitar duplicados.
 */
@Entity
@Table(
        name = "forum_likes",
        uniqueConstraints = @UniqueConstraint(columnNames = {"forum_id", "user_id"})
)
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class ForumLike {

    @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;

    private LocalDateTime likedAt;

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