currencies

Documentation

Index

• type Rate
• type Service
  • func NewService(db Store) *Service
  • func (s *Service) GetRate(base, target accounts.Currency, month string) float64
  • func (s *Service) SetRate(base, target accounts.Currency, month string, rate float64) error
• type Store
  • func NewGormStore(db *gorm.DB) Store

Types

type Rate

type Rate struct {
	Base      accounts.Currency `gorm:"primaryKey"`
	Target    accounts.Currency `gorm:"primaryKey"`
	YearMonth string            `gorm:"primaryKey"`
	Rate      float64
}

type Service

type Service struct {
	// contains filtered or unexported fields
}

Service represents currencies service.

func NewService

func NewService(db Store) *Service

NewService initializes new currencies service.

func (*Service) GetRate

func (s *Service) GetRate(base, target accounts.Currency, month string) float64

GetRate provides the conversion rate for requested currencies in specified month.

func (*Service) SetRate

func (s *Service) SetRate(base, target accounts.Currency, month string, rate float64) error

SetRate sets the conversion rate for requested currencies in specified month.

type Store

type Store interface {
	// SetRate saves conversion rate into the DB.
	SetRate(base, target accounts.Currency, month string, rate float64) error
	// GetRate retrieves conversion rate from the DB.
	GetRate(base, target accounts.Currency, month string) (*Rate, error)
}

Store is an interface for currencies DB API.

func NewGormStore

func NewGormStore(db *gorm.DB) Store