Add situation when transfer will be from one currency on the card to different currency
This commit is contained in:
parent
e1a46f5fc7
commit
4199603be3
145
db/transfer.go
145
db/transfer.go
|
|
@ -14,6 +14,9 @@ type Transfer struct {
|
|||
ToCardID uint
|
||||
ToCard *Card
|
||||
Value uint64
|
||||
HaveDifferentCurrencies bool
|
||||
FromValue uint64
|
||||
ToValue uint64
|
||||
Date time.Time
|
||||
UserID uint
|
||||
User *User
|
||||
|
|
@ -36,34 +39,65 @@ func (t *Transfer) SetUserID(id uint) {
|
|||
|
||||
var (
|
||||
ERROR_TRANSFER_FROMCARD_INVALID_USERID = errors.New("Transfer's UserID and FromCard's UserID are not equal")
|
||||
ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE = errors.New("FromCard's Balance is lower than Transfer's Value")
|
||||
ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE = errors.New("FromCard's Balance is lower than Transfer's Value or FromValue")
|
||||
ERROR_TRANSFER_TOCARD_INVALID_USERID = errors.New("Transfer's UserID and ToCard's UserID are not equal")
|
||||
ERROR_TRANSFER_CURRENCY_INCOSISTENCE = errors.New("Transfer is using differenct currencies but FromValue or ToValue is not set approprietly")
|
||||
)
|
||||
|
||||
func (t *Transfer) validateTransfer(fromCard, toCard *Card) error {
|
||||
if fromCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_FROMCARD_INVALID_USERID
|
||||
}
|
||||
if toCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_TOCARD_INVALID_USERID
|
||||
}
|
||||
diffCurs := fromCard.CurrencyID != toCard.CurrencyID
|
||||
if diffCurs && (t.FromValue == 0 || t.ToValue == 0) {
|
||||
return ERROR_TRANSFER_CURRENCY_INCOSISTENCE
|
||||
}
|
||||
if !diffCurs && fromCard.Balance < t.Value {
|
||||
return ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
if diffCurs && fromCard.Balance < t.FromValue {
|
||||
return ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (t *Transfer) BeforeCreate(tx *gorm.DB) error {
|
||||
fromCard := &Card{}
|
||||
if err := tx.Find(fromCard, t.FromCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if fromCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_FROMCARD_INVALID_USERID
|
||||
toCard := &Card{}
|
||||
if err := tx.Find(toCard, t.ToCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if fromCard.Balance < t.Value {
|
||||
return ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE
|
||||
if err := t.validateTransfer(fromCard, toCard); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
t.HaveDifferentCurrencies = fromCard.CurrencyID != toCard.CurrencyID
|
||||
// on same CurrencyID fromCard and toCard should use Value
|
||||
if !t.HaveDifferentCurrencies {
|
||||
fromCard.Balance -= t.Value
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
//
|
||||
toCard := &Card{}
|
||||
if err := tx.Find(toCard, t.ToCardID).Error; err != nil {
|
||||
toCard.Balance += t.Value
|
||||
if err := tx.Save(toCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if toCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_TOCARD_INVALID_USERID
|
||||
return nil
|
||||
}
|
||||
toCard.Balance += t.Value
|
||||
// on DIFFERENT CurrencyID fromCard should use FromValue and toCard should use ToValue
|
||||
fromCard.Balance -= t.FromValue
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
//
|
||||
toCard.Balance += t.ToValue
|
||||
if err := tx.Save(toCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -71,39 +105,43 @@ func (t *Transfer) BeforeCreate(tx *gorm.DB) error {
|
|||
}
|
||||
|
||||
var (
|
||||
ERROR_TRANSFER_FROMCARD_IDZERO = errors.New("Transfer's FromCardID is zero")
|
||||
ERROR_TRANSFER_TOCARD_IDZERO = errors.New("Transfer's ToCardID is zero")
|
||||
ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE = errors.New("Transfer's ToCard's Balance is lower than value of transfer")
|
||||
ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE = errors.New("Transfer's ToCard's Balance is lower than Value of ToValue of transfer")
|
||||
)
|
||||
|
||||
func (t *Transfer) BeforeUpdate(tx *gorm.DB) error {
|
||||
var original Transfer
|
||||
if err := tx.Find(&original, t.ID).Error; err != nil {
|
||||
var original *Transfer
|
||||
if err := tx.Find(original, t.ID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if original.FromCardID == 0 {
|
||||
return ERROR_TRANSFER_FROMCARD_IDZERO
|
||||
}
|
||||
var origFromCard Card
|
||||
if err := tx.Find(&origFromCard, original.FromCardID).Error; err != nil {
|
||||
var origFromCard *Card
|
||||
if err := tx.Find(origFromCard, original.FromCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
origFromCard.Balance += original.Value
|
||||
if err := tx.Save(origFromCard).Error; err != nil {
|
||||
var origToCard *Card
|
||||
if err := tx.Find(origToCard, original.ToCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if original.ToCardID == 0 {
|
||||
return ERROR_TRANSFER_FROMCARD_IDZERO
|
||||
}
|
||||
var origToCard Card
|
||||
if err := tx.Find(&origToCard, original.ToCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
diffCurs := origFromCard.CurrencyID != origToCard.CurrencyID
|
||||
if !diffCurs {
|
||||
origFromCard.Balance += original.Value
|
||||
if origToCard.Balance < original.Value {
|
||||
return ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
origToCard.Balance -= original.Value
|
||||
} else {
|
||||
if original.FromValue == 0 || original.ToValue == 0 {
|
||||
return ERROR_TRANSFER_CURRENCY_INCOSISTENCE
|
||||
}
|
||||
origFromCard.Balance += original.FromValue
|
||||
if origToCard.Balance < original.ToValue {
|
||||
return ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
origToCard.Balance -= original.ToValue
|
||||
}
|
||||
if err := tx.Save(origFromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if err := tx.Save(origToCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -112,25 +150,35 @@ func (t *Transfer) BeforeUpdate(tx *gorm.DB) error {
|
|||
if err := tx.Find(fromCard, t.FromCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if fromCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_FROMCARD_INVALID_USERID
|
||||
toCard := &Card{}
|
||||
if err := tx.Find(toCard, t.ToCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if fromCard.Balance < t.Value {
|
||||
return ERROR_TRANSFER_FROMCARD_INSUFFICIENT_BALANCE
|
||||
if err := t.validateTransfer(fromCard, toCard); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
t.HaveDifferentCurrencies = fromCard.CurrencyID != toCard.CurrencyID
|
||||
// on same CurrencyID fromCard and toCard should use Value
|
||||
if !t.HaveDifferentCurrencies {
|
||||
fromCard.Balance -= t.Value
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
//
|
||||
toCard := &Card{}
|
||||
if err := tx.Find(toCard, t.ToCardID).Error; err != nil {
|
||||
toCard.Balance += t.Value
|
||||
if err := tx.Save(toCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if toCard.UserID != t.UserID {
|
||||
return ERROR_TRANSFER_TOCARD_INVALID_USERID
|
||||
return nil
|
||||
}
|
||||
toCard.Balance += t.Value
|
||||
// on DIFFERENT CurrencyID fromCard should use FromValue and toCard should use ToValue
|
||||
fromCard.Balance -= t.FromValue
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
//
|
||||
toCard.Balance += t.ToValue
|
||||
if err := tx.Save(toCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -142,18 +190,31 @@ func (t *Transfer) AfterDelete(tx *gorm.DB) error {
|
|||
if err := tx.Find(fromCard, t.FromCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
fromCard.Balance += t.Value
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
toCard := &Card{}
|
||||
if err := tx.Find(toCard, t.ToCardID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
diffCurs := fromCard.CurrencyID != toCard.CurrencyID
|
||||
if !diffCurs {
|
||||
fromCard.Balance += t.Value
|
||||
if toCard.Balance < t.Value {
|
||||
return ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
toCard.Balance -= t.Value
|
||||
return nil
|
||||
} else {
|
||||
if t.FromValue == 0 || t.ToValue == 0 {
|
||||
return ERROR_TRANSFER_CURRENCY_INCOSISTENCE
|
||||
}
|
||||
fromCard.Balance += t.FromValue
|
||||
if toCard.Balance < t.ToValue {
|
||||
return ERROR_TRANSFER_TOCARD_INSUFFICIENT_BALANCE
|
||||
}
|
||||
toCard.Balance -= t.ToValue
|
||||
}
|
||||
if err := tx.Save(fromCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
if err := tx.Save(toCard).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user