refactor errors

core/email_queue.go

@@ -2,7 +2,6 @@ package core
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/config"
@@ -51,9 +50,9 @@ func NewSESClient() SESClient {
 }
 
 func (s *SESClient) SendEmail(email Email) error {
-
 	if _, exists := s.ResetCache.Get(email.Recipient); exists {
-		return fmt.Errorf("email already sent to %s with subject %s", email.Recipient, email.Subject)
+		log.Printf("email already sent to %s with subject %s", email.Recipient, email.Subject)
+		return ErrEmailAlreadySent
 	}
 
 	// Load AWS configuration
@@ -61,7 +60,7 @@ func (s *SESClient) SendEmail(email Email) error {
 	if err != nil {
 		errMsg := fmt.Sprintf("unable to load SDK config, %v", err)
 		log.Print(errMsg)
-		return errors.New(errMsg)
+		return err
 	}
 
 	// Create an SES client
@@ -93,7 +92,9 @@ func (s *SESClient) SendEmail(email Email) error {
 	resp, err := sesClient.SendEmail(context.TODO(), input)
 	if err != nil {
 		s.ResetCache.Delete(email.Recipient)
-		return fmt.Errorf("failed to send email, %v", err)
+		errMsg := fmt.Sprintf("failed to send email, %v", err)
+		log.Print(errMsg)
+		return err
 	}
 
 	// Output the message ID of the sent email