payments/internal/models/payment_initiation_adjustments.go

package models

import (
	"encoding/json"
	"errors"
	"math/big"
	"time"

	"github.com/formancehq/go-libs/v3/pointer"
)

type PaymentInitiationAdjustment struct {
	// Unique ID
	ID PaymentInitiationAdjustmentID `json:"id"`

	// Creation date of the adjustment
	CreatedAt time.Time `json:"createdAt"`
	// Last status of the adjustment
	Status PaymentInitiationAdjustmentStatus `json:"status"`
	// Amount of the adjustment in case we have a refund, reverse etc...
	Amount *big.Int `json:"amount"`
	// Currency of the adjustment in case we have a refund, reverse etc...
	Asset *string `json:"asset"`
	// Error description if we had one
	Error error `json:"error"`
	// Additional metadata
	Metadata map[string]string `json:"metadata"`
}

func (p *PaymentInitiationAdjustment) IdempotencyKey() string {
	return IdempotencyKey(p.ID)
}

func (pia PaymentInitiationAdjustment) MarshalJSON() ([]byte, error) {
	return json.Marshal(&struct {
		ID        string                            `json:"id"`
		CreatedAt time.Time                         `json:"createdAt"`
		Status    PaymentInitiationAdjustmentStatus `json:"status"`
		Amount    *big.Int                          `json:"amount,omitempty"`
		Asset     *string                           `json:"asset,omitempty"`
		Error     *string                           `json:"error,omitempty"`
		Metadata  map[string]string                 `json:"metadata"`
	}{
		ID:        pia.ID.String(),
		CreatedAt: pia.CreatedAt,
		Status:    pia.Status,
		Amount:    pia.Amount,
		Asset:     pia.Asset,
		Error: func() *string {
			if pia.Error == nil {
				return nil
			}

			return pointer.For(pia.Error.Error())
		}(),
		Metadata: pia.Metadata,
	})
}

func (pia *PaymentInitiationAdjustment) UnmarshalJSON(data []byte) error {
	var aux struct {
		ID        string                            `json:"id"`
		CreatedAt time.Time                         `json:"createdAt"`
		Status    PaymentInitiationAdjustmentStatus `json:"status"`
		Amount    *big.Int                          `json:"amount"`
		Asset     *string                           `json:"asset"`
		Error     *string                           `json:"error"`
		Metadata  map[string]string                 `json:"metadata"`
	}

	if err := json.Unmarshal(data, &aux); err != nil {
		return err
	}

	id, err := PaymentInitiationAdjustmentIDFromString(aux.ID)
	if err != nil {
		return err
	}

	pia.ID = id
	pia.CreatedAt = aux.CreatedAt
	pia.Status = aux.Status
	pia.Amount = aux.Amount
	pia.Asset = aux.Asset
	if aux.Error != nil {
		pia.Error = errors.New(*aux.Error)
	}
	pia.Metadata = aux.Metadata

	return nil
}