add cron job to sync currencies once in 24 hours

pkg/service/currency.go

@@ -0,0 +1,50 @@
+package service
+
+import (
+	"context"
+	"log"
+	"wallet-api/pkg/model"
+	"wallet-api/pkg/repository"
+	"wallet-api/pkg/utl/common"
+)
+
+type CurrencyService struct {
+	repository *repository.CurrencyRepository
+	logger     *log.Logger
+}
+
+func NewCurrencyService(repository *repository.CurrencyRepository, logger *log.Logger) *CurrencyService {
+	return &CurrencyService{
+		repository: repository,
+		logger:     logger,
+	}
+}
+
+/*
+GetFirst
+
+Gets first row from Currency table.
+
+	   	Args:
+	   		context.Context: Application context
+		Returns:
+			model.CurrencyModel: Currency object from database.
+*/
+func (as CurrencyService) Sync(ctx context.Context) {
+	resp, err := common.Fetch[model.ExchangeBody]("GET", "https://api.exchangerate-api.com/v4/latest/euro")
+	if err != nil {
+		as.logger.Println(err)
+		return
+	}
+	m := resp.Rates.(map[string]interface{})
+
+	rates := new([]model.Rate)
+
+	for k, v := range m {
+		rate := new(model.Rate)
+		rate.Code = k
+		rate.Rate = v.(float64)
+		*rates = append(*rates, *rate)
+	}
+	as.repository.SyncBulk(ctx, rates)
+}