rdb: add wait function for instance logs

api/rdb/v1/rdb_utils.go

@@ -108,3 +108,49 @@ func (s *API) WaitForDatabaseBackup(req *WaitForDatabaseBackupRequest) (*Databas
 	}
 	return backup.(*DatabaseBackup), nil
 }
+
+type WaitForInstanceLogRequest struct {
+	InstanceLogID string
+	Region        scw.Region
+	Timeout       *time.Duration
+	RetryInterval *time.Duration
+}
+
+// WaitForInstanceLog waits for the instance logs to be in a "terminal state" before returning.
+// This function can be used to wait for an instance logs to be ready for example.
+func (s *API) WaitForInstanceLog(req *WaitForInstanceLogRequest) (*InstanceLog, error) {
+	timeout := defaultTimeout
+	if req.Timeout != nil {
+		timeout = *req.Timeout
+	}
+	retryInterval := defaultRetryInterval
+	if req.RetryInterval != nil {
+		retryInterval = *req.RetryInterval
+	}
+
+	terminalStatus := map[InstanceLogStatus]struct{}{
+		InstanceLogStatusReady: {},
+		InstanceLogStatusError: {},
+	}
+
+	logs, err := async.WaitSync(&async.WaitSyncConfig{
+		Get: func() (interface{}, bool, error) {
+			res, err := s.GetInstanceLog(&GetInstanceLogRequest{
+				Region: req.Region,
+			})
+
+			if err != nil {
+				return nil, false, err
+			}
+			_, isTerminal := terminalStatus[res.Status]
+
+			return res, isTerminal, nil
+		},
+		Timeout:          timeout,
+		IntervalStrategy: async.LinearIntervalStrategy(retryInterval),
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "waiting for instance logs failed")
+	}
+	return logs.(*InstanceLog), nil
+}