first commit

internal/email/sender.go

@@ -0,0 +1,44 @@
+package email
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/sony/gobreaker"
+)
+
+type Sender struct {
+	endpoint string
+	breaker  *gobreaker.CircuitBreaker
+}
+
+func NewSender(endpoint string) *Sender {
+	return &Sender{
+		endpoint: endpoint,
+		breaker: gobreaker.NewCircuitBreaker(gobreaker.Settings{
+			Name:        "email-service",
+			MaxRequests: 3,
+			Interval:    time.Minute,
+			Timeout:     10 * time.Second,
+		}),
+	}
+}
+
+func (s *Sender) SendInvite(ctx context.Context, email, teamName string) error {
+	_, err := s.breaker.Execute(func() (any, error) {
+		if s.endpoint == "" {
+			return nil, errors.New("email endpoint is empty")
+		}
+		if s.endpoint == "mock://email" {
+			return nil, nil
+		}
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case <-time.After(20 * time.Millisecond):
+			return nil, nil
+		}
+	})
+	return err
+}