source: backend/web3-Ednevnik-Backend/src/main/java/com/nikola/web3ednevnikbackend/model/payments/Plakjanje.java

package com.nikola.web3ednevnikbackend.model.payments;

import com.nikola.web3ednevnikbackend.model.announcements.SoopstenieZa_Plakjanje;
import com.nikola.web3ednevnikbackend.model.enums.StatusPlakjanje;
import com.nikola.web3ednevnikbackend.model.users.Roditel;
import jakarta.persistence.*;
import lombok.Data;

import java.math.BigDecimal;
import java.time.Instant;
import java.time.LocalDateTime;
import java.util.UUID;

@Entity
@Table(name = "plakjanje", uniqueConstraints = {
        @UniqueConstraint(columnNames = {"platenoOdRoditel_Id", "soopstenie_za_plakjanje_id"})
})
@Data
public class Plakjanje {

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

    @Enumerated(EnumType.STRING)
    @Column(nullable = false)
    private StatusPlakjanje status;

    @Column(name = "tx_hash", unique = true, length = 100)
    private String txHash;

    @Column(nullable = false, length = 10)
    private String valuta;

    @Column(name = "plateno_na")
    private Instant platenoNa;

    @Column(nullable = false, precision = 38, scale = 18)
    private BigDecimal iznos;

    @ManyToOne
    @JoinColumn(name = "platenoOdRoditel_Id", nullable = false)
    private Roditel platenoOdRoditel;

    @ManyToOne
    @JoinColumn(name = "soopstenie_za_plakjanje_id", nullable = false)
    private SoopstenieZa_Plakjanje soopstenieZaPlakjanje;

    @Column(name = "created_at", nullable = false, updatable = false)
    private Instant createdAt;

    @PrePersist
    @PreUpdate
    private void validateTxHashBasedOnStatus() {
        if (status == StatusPlakjanje.KREIRANO && txHash != null) {
            throw new IllegalStateException("KREIRANO payment must have null tx_hash");
        }
        if ((status == StatusPlakjanje.TX_SUBMITTED ||
                status == StatusPlakjanje.ODOBRENO ||
                status == StatusPlakjanje.ZAVRSENO || status == StatusPlakjanje.FAILED) && txHash == null) {
            throw new IllegalStateException("SUBMITED/Approved/Completed payment must have tx_hash");
        }
    }
}