feat(tem): implement domain waiter (#1447)

Author: quantumsheep

api/tem/v1alpha1/tem_utils.go

@@ -0,0 +1,66 @@
+package tem
+
+import (
+	"time"
+
+	"github.com/scaleway/scaleway-sdk-go/internal/async"
+	"github.com/scaleway/scaleway-sdk-go/internal/errors"
+	"github.com/scaleway/scaleway-sdk-go/scw"
+)
+
+const (
+	defaultTimeout       = 5 * time.Minute
+	defaultRetryInterval = 15 * time.Second
+)
+
+// WaitForDomainRequest is used by WaitForDomain method
+type WaitForDomainRequest struct {
+	DomainID      string
+	Region        scw.Region
+	Timeout       *time.Duration
+	RetryInterval *time.Duration
+}
+
+// WaitForDomain wait for the domain to be in a "terminal state" before returning.
+// This function can be used to wait for a domain to be checked for example.
+func (s *API) WaitForDomain(req *WaitForDomainRequest, opts ...scw.RequestOption) (*Domain, error) {
+	timeout := defaultTimeout
+	if req.Timeout != nil {
+		timeout = *req.Timeout
+	}
+	retryInterval := defaultRetryInterval
+	if req.RetryInterval != nil {
+		retryInterval = *req.RetryInterval
+	}
+
+	terminalStatus := map[DomainStatus]struct{}{
+		DomainStatusChecked:   {},
+		DomainStatusUnchecked: {},
+		DomainStatusInvalid:   {},
+		DomainStatusLocked:    {},
+		DomainStatusRevoked:   {},
+		DomainStatusUnknown:   {},
+	}
+
+	domain, err := async.WaitSync(&async.WaitSyncConfig{
+		Get: func() (interface{}, bool, error) {
+			img, err := s.GetDomain(&GetDomainRequest{
+				Region:   req.Region,
+				DomainID: req.DomainID,
+			}, opts...)
+			if err != nil {
+				return nil, false, err
+			}
+
+			_, isTerminal := terminalStatus[img.Status]
+
+			return img, isTerminal, err
+		},
+		Timeout:          timeout,
+		IntervalStrategy: async.LinearIntervalStrategy(retryInterval),
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "waiting for domain failed")
+	}
+	return domain.(*Domain), nil
+}