OpenIsle/src/main/java/com/openisle/model/Activity.java

package com.openisle.model;

import jakarta.persistence.*;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.hibernate.annotations.CreationTimestamp;

import java.time.LocalDateTime;
import java.util.HashSet;
import java.util.Set;

/** Generic activity entity. */
@Entity
@Getter
@Setter
@NoArgsConstructor
@Table(name = "activities")
public class Activity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false)
    private String title;

    private String icon;

    private String content;

    @Column(name = "start_time", nullable = false)
    @CreationTimestamp
    private LocalDateTime startTime;

    @Column(name = "end_time")
    private LocalDateTime endTime;

    @Enumerated(EnumType.STRING)
    @Column(nullable = false)
    private ActivityType type = ActivityType.NORMAL;

    @ManyToMany(fetch = FetchType.LAZY)
    @JoinTable(name = "activity_participants",
            joinColumns = @JoinColumn(name = "activity_id"),
            inverseJoinColumns = @JoinColumn(name = "user_id"))
    private Set<User> participants = new HashSet<>();

    @Column(nullable = false)
    private boolean ended = false;
}