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service.go
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service.go
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package card
import (
"fmt"
"github.com/pkg/errors"
"github.com/rs/zerolog/log"
)
type Service interface {
Import(card *Card) error
Count() (int, error)
}
type cardService struct {
dao *PostgresCardDao
}
func NewService(dao *PostgresCardDao) Service {
return &cardService{
dao: dao,
}
}
func (s *cardService) Count() (int, error) {
return s.dao.Count()
}
func (s *cardService) Import(card *Card) error {
if card == nil {
// Skip nil card
return nil
}
if err := card.isValid(); err != nil {
return fmt.Errorf("card is invalid %w", err)
}
var isNewCard bool
err := s.dao.withTransaction(func(txDao *PostgresCardDao) error {
var err error
card, isNewCard, err = mergeCard(txDao, card)
if err != nil {
return err
}
return mergeCardFaces(txDao, card.Faces, card.ID.Int64, isNewCard)
})
if err != nil {
return err
}
for _, f := range card.Faces {
if !f.ID.Valid {
return fmt.Errorf("expected face %s of card %s and set %s to be created", f.Name, card.Number, card.CardSetCode)
}
faceID := f.ID.Int64
if err := mergeSubTypes(s.dao, f.Subtypes, faceID, isNewCard); err != nil {
return err
}
if err := mergeSuperTypes(s.dao, f.Supertypes, faceID, isNewCard); err != nil {
return err
}
if err := mergeCardTypes(s.dao, f.Cardtypes, faceID, isNewCard); err != nil {
return err
}
if err := mergeFaceTranslations(s.dao, f.Translations, faceID, isNewCard); err != nil {
return err
}
}
return nil
}
func mergeCard(txDao *PostgresCardDao, c *Card) (*Card, bool, error) {
existingCard, err := txDao.FindUniqueCard(c.CardSetCode, c.Number)
if err != nil {
if !errors.Is(err, ErrEntryNotFound) {
return nil, false, fmt.Errorf("failed to find card with code %s and number %s. %w", c.CardSetCode, c.Number, err)
}
}
if existingCard == nil {
if err := txDao.CreateCard(c); err != nil {
log.Error().Err(err).Msgf("Failed to create card %#v", c)
return nil, false, err
}
if e := log.Trace(); e.Enabled() {
e.Msgf("Created card %s from set %s", c.Number, c.CardSetCode)
}
return c, true, nil
}
c.ID = existingCard.ID
diff := existingCard.Diff(c)
if diff.HasChanges() {
log.Info().Msgf("Update card %s from set %s with changes %s", c.Name, c.CardSetCode, diff.String())
if err := txDao.UpdateCard(c); err != nil {
return nil, false, err
}
}
return c, false, err
}
func mergeFaceTranslations(dao *PostgresCardDao, tt []Translation, faceID int64, isNewCard bool) error {
return dao.withTransaction(func(txDao *PostgresCardDao) error {
return mergeTranslations(txDao, tt, faceID, isNewCard)
})
}
func mergeCardFaces(dao *PostgresCardDao, ff []*Face, cardID int64, isNewCard bool) error {
var incomingFaces []*Face
incomingFaces = append(incomingFaces, ff...)
if !isNewCard {
existingFaces, err := dao.FindAssignedFaces(cardID)
if err != nil {
return fmt.Errorf("failed to get assigned faces %w", err)
}
for _, existingFace := range existingFaces {
if ok, pos := containsFace(incomingFaces, existingFace); ok {
incomingFace := incomingFaces[pos]
incomingFace.ID = existingFace.ID
diff := existingFace.Diff(incomingFace)
if diff.HasChanges() {
log.Info().Msgf("Update face %s of card %v with changes %s", incomingFace.Name, cardID, diff.String())
if err := dao.UpdateFace(incomingFace); err != nil {
return err
}
}
incomingFaces = removeFace(incomingFaces, pos)
continue
}
faceID := existingFace.ID.Int64
if err := dao.DeleteFace(faceID); err != nil {
return err
}
log.Warn().Msgf("Deleted card face %v of card %v", existingFace.Name, cardID)
}
}
for _, newFace := range incomingFaces {
if err := dao.AddFace(cardID, newFace); err != nil {
return err
}
}
assigned, err := dao.FindAssignedFaces(cardID)
if err != nil {
return fmt.Errorf("failed to get assigned faces %w", err)
}
if len(assigned) != len(ff) {
return fmt.Errorf("unexpected face count assigned to card %d, expected %d but found %d",
cardID, len(ff), len(assigned))
}
return nil
}
func mergeSubTypes(dao *PostgresCardDao, tt []string, faceID int64, isNewCard bool) error {
return dao.withTransaction(func(txDao *PostgresCardDao) error {
return mergeTypes(txDao.subType, tt, faceID, isNewCard)
})
}
func mergeSuperTypes(dao *PostgresCardDao, tt []string, faceID int64, isNewCard bool) error {
return dao.withTransaction(func(txDao *PostgresCardDao) error {
return mergeTypes(txDao.superType, tt, faceID, isNewCard)
})
}
func mergeCardTypes(dao *PostgresCardDao, tt []string, faceID int64, isNewCard bool) error {
return dao.withTransaction(func(txDao *PostgresCardDao) error {
return mergeTypes(txDao.cardType, tt, faceID, isNewCard)
})
}
func mergeTypes(dao TypeDao, tt []string, faceID int64, isNewCard bool) error {
if isNewCard && len(tt) == 0 {
// skip, nothing to create or delete
return nil
}
var toCreate []string
toCreate = append(toCreate, tt...)
if !isNewCard {
existingTypes, err := dao.FindAssignments(faceID)
if err != nil {
return fmt.Errorf("failed to get assigned types %w", err)
}
var toRemove []int64
// remove all entries that are already assigned to the card
for _, existingType := range existingTypes {
if ok, pos := contains(toCreate, existingType.Name); ok {
toCreate = remove(toCreate, pos)
} else {
toRemove = append(toRemove, existingType.ID.Int64)
}
}
if len(toRemove) > 0 {
if err := dao.DeleteAssignments(faceID, toRemove...); err != nil {
return fmt.Errorf("failed to removed assigned types %w", err)
}
}
}
return assignTypes(dao, toCreate, faceID)
}
func assignTypes(dao TypeDao, toCreate []string, faceID int64) error {
if len(toCreate) == 0 {
return nil
}
types, err := dao.Find(toCreate...)
if err != nil {
return fmt.Errorf("failed to find types %v %w", toCreate, err)
}
for _, t := range toCreate {
var entry *CharacteristicType
for _, existingType := range types {
if t == existingType.Name {
entry = existingType
}
}
if entry == nil {
if entry, err = dao.Create(t); err != nil {
return fmt.Errorf("failed to create type %s %w", t, err)
}
}
if err := dao.AssignToFace(faceID, entry.ID.Int64); err != nil {
return fmt.Errorf("failed to assign type %v to card %d %w", entry, faceID, err)
}
}
return nil
}
func mergeTranslations(dao *PostgresCardDao, tt []Translation, faceID int64, isNewCard bool) error {
var toCreate []Translation
toCreate = append(toCreate, tt...)
if !isNewCard {
existingTranslations, err := dao.FindTranslations(faceID)
if err != nil {
return fmt.Errorf("failed to get existing translations %w", err)
}
for _, existingTranslation := range existingTranslations {
if ok, pos := containsTranslation(tt, *existingTranslation); ok {
toCreate = removeTranslation(toCreate, *existingTranslation)
translation := &tt[pos]
diff := existingTranslation.Diff(translation)
if diff.HasChanges() {
log.Info().Msgf("Update translation for face %v and language %v with changes %s",
faceID, existingTranslation.Lang, diff.String())
if err := dao.UpdateTranslation(faceID, translation); err != nil {
return err
}
}
} else {
if err := dao.DeleteTranslation(faceID, existingTranslation.Lang); err != nil {
return err
}
}
}
}
for _, t := range toCreate {
t := t
if err := dao.AddTranslation(faceID, &t); err != nil {
return err
}
}
return nil
}
func remove(arr []string, pos int) []string {
arr[pos] = arr[len(arr)-1]
return arr[:len(arr)-1]
}
func contains(s []string, term string) (bool, int) {
for i, e := range s {
if e == term {
return true, i
}
}
return false, 0
}
func removeFace(arr []*Face, pos int) []*Face {
arr[pos] = arr[len(arr)-1]
return arr[:len(arr)-1]
}
func containsFace(arr []*Face, searchTerm *Face) (bool, int) {
for i, f := range arr {
if f.isSame(searchTerm) {
return true, i
}
}
for i, f := range arr {
if f.couldBeSame(searchTerm) {
return true, i
}
}
return false, 0
}
func removeTranslation(arr []Translation, toRemove Translation) []Translation {
if ok, pos := containsTranslation(arr, toRemove); ok {
arr[pos] = arr[len(arr)-1]
return arr[:len(arr)-1]
}
return arr
}
func containsTranslation(arr []Translation, t Translation) (bool, int) {
for i, e := range arr {
if e.Lang == t.Lang {
return true, i
}
}
return false, 0
}