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currency_rates.go
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/
currency_rates.go
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package bbolt
import (
"context"
"encoding/json"
"fmt"
port "github.com/devdammit/shekel/cmd/unit/internal/ports/repositories/currency-rates"
"github.com/devdammit/shekel/internal/resources"
"github.com/devdammit/shekel/pkg/currency"
"github.com/devdammit/shekel/pkg/log"
"github.com/devdammit/shekel/pkg/types/datetime"
"go.etcd.io/bbolt"
)
var CurrencyRatesBucket = []byte("currency_rates")
type CurrencyRatesRepository struct {
db *resources.Bolt
data map[datetime.Date]currency.Rates
}
func NewCurrencyRatesRepository(bolt *resources.Bolt) *CurrencyRatesRepository {
return &CurrencyRatesRepository{
db: bolt,
data: make(map[datetime.Date]currency.Rates),
}
}
func (r *CurrencyRatesRepository) GetName() string {
return "currency_rates"
}
func (r *CurrencyRatesRepository) Start() error {
err := r.db.Update(func(tx *bbolt.Tx) error {
root := tx.Bucket(resources.BoltRootBucket)
_, err := root.CreateBucketIfNotExists(CurrencyRatesBucket)
if err != nil {
return fmt.Errorf("could not create skus bucket: %v", err)
}
return nil
})
if err != nil {
return err
}
return r.db.View(func(tx *bbolt.Tx) error {
bucket := tx.Bucket(resources.BoltRootBucket).Bucket(CurrencyRatesBucket)
err = bucket.ForEach(func(k, v []byte) error {
var data map[datetime.Date]currency.Rates
err = json.Unmarshal(v, &data)
if err != nil {
return err
}
r.data = data
return nil
})
if err != nil {
return err
}
log.Info("currency rates loaded", log.Int("count", len(r.data)))
return nil
})
}
func (r *CurrencyRatesRepository) GetCurrencyRateByDate(_ context.Context, code currency.Code, date datetime.Date) (float64, error) {
if r.data[date] == nil {
return 0, port.ErrRateNotFound
}
return r.data[date][code], nil
}