añadidos ficheros a falta de modificar el servicio y el controlador redsys

src/main/java/com/imprimelibros/erp/payments/model/Refund.java

@@ -0,0 +1,99 @@
+package com.imprimelibros.erp.payments.model;
+
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(
+    name = "refunds",
+    uniqueConstraints = {
+        @UniqueConstraint(name = "uq_refund_gateway_id", columnNames = {"gateway_refund_id"})
+    },
+    indexes = {
+        @Index(name = "idx_ref_pay", columnList = "payment_id"),
+        @Index(name = "idx_ref_status", columnList = "status")
+    }
+)
+public class Refund {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "payment_id", nullable = false)
+    private Payment payment;
+
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "transaction_id")
+    private PaymentTransaction transaction; // el REFUND en payment_transactions
+
+    @Column(name = "amount_cents", nullable = false)
+    private Long amountCents;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "reason", nullable = false, length = 32)
+    private RefundReason reason = RefundReason.CUSTOMER_REQUEST;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "status", nullable = false, length = 16)
+    private RefundStatus status = RefundStatus.PENDING;
+
+    @Column(name = "requested_by_user_id")
+    private Long requestedByUserId;
+
+    @Column(name = "requested_at", nullable = false,
+            columnDefinition = "datetime default current_timestamp")
+    private LocalDateTime requestedAt;
+
+    @Column(name = "processed_at")
+    private LocalDateTime processedAt;
+
+    @Column(name = "gateway_refund_id", length = 128)
+    private String gatewayRefundId;
+
+    @Column(name = "notes", length = 500)
+    private String notes;
+
+    @Column(name = "metadata", columnDefinition = "json")
+    private String metadata;
+
+    public Refund() {}
+
+    // Getters & Setters
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+
+    public Payment getPayment() { return payment; }
+    public void setPayment(Payment payment) { this.payment = payment; }
+
+    public PaymentTransaction getTransaction() { return transaction; }
+    public void setTransaction(PaymentTransaction transaction) { this.transaction = transaction; }
+
+    public Long getAmountCents() { return amountCents; }
+    public void setAmountCents(Long amountCents) { this.amountCents = amountCents; }
+
+    public RefundReason getReason() { return reason; }
+    public void setReason(RefundReason reason) { this.reason = reason; }
+
+    public RefundStatus getStatus() { return status; }
+    public void setStatus(RefundStatus status) { this.status = status; }
+
+    public Long getRequestedByUserId() { return requestedByUserId; }
+    public void setRequestedByUserId(Long requestedByUserId) { this.requestedByUserId = requestedByUserId; }
+
+    public LocalDateTime getRequestedAt() { return requestedAt; }
+    public void setRequestedAt(LocalDateTime requestedAt) { this.requestedAt = requestedAt; }
+
+    public LocalDateTime getProcessedAt() { return processedAt; }
+    public void setProcessedAt(LocalDateTime processedAt) { this.processedAt = processedAt; }
+
+    public String getGatewayRefundId() { return gatewayRefundId; }
+    public void setGatewayRefundId(String gatewayRefundId) { this.gatewayRefundId = gatewayRefundId; }
+
+    public String getNotes() { return notes; }
+    public void setNotes(String notes) { this.notes = notes; }
+
+    public String getMetadata() { return metadata; }
+    public void setMetadata(String metadata) { this.metadata = metadata; }
+}