model.go

package lineitem

import (
	"errors"

	"github.com/ezoic/go-dfpapi/generated/lineitemservice"
)

type LineItemModel struct {
	Attributes *lineitemservice.LineItem
}

func (lim *LineItemModel) GetCustomTargetingValuesFromKeyID(targetID int64) ([]*int64, error) {
	var values []*int64

	targetingPtr := lim.Attributes.Targeting
	if targetingPtr == nil {
		return values, errors.New("Targeting is missing")
	}
	targeting := *targetingPtr

	customTargetingPtr := targeting.CustomTargeting
	if customTargetingPtr == nil {
		return values, errors.New("Custom targeting is missing")
	}

	customTargeting := *customTargetingPtr
	children := customTargeting.Children
	var childPtr *lineitemservice.CustomCriteriaNode

	if len(children) > 1 {
		for _, target := range children {
			if target == nil {
				continue
			}

			customCriteriaPtr := target.CustomCriteria
			if customCriteriaPtr == nil {
				continue
			}

			customCriteria := *customCriteriaPtr
			keyIdPtr := customCriteria.KeyId
			if keyIdPtr == nil {
				continue
			}

			keyID := *keyIdPtr
			if keyID == targetID {
				childPtr = target
				break
			}
		}
	} else {
		childPtr = children[0]
	}

	if childPtr == nil {
		return values, errors.New("Missing child values")
	}

	child := *childPtr
	criteriaPtr := child.CustomCriteria
	if criteriaPtr == nil {
		return values, errors.New("Missing custom criteria")
	}

	criteria := *criteriaPtr
	return criteria.ValueIds, nil
}