[WIP] API refactor (#1737)

* refactor openpitrix API

Signed-off-by: hongming <talonwan@yunify.com>

* add openpitrix mock client

Signed-off-by: hongming <talonwan@yunify.com>

* refactor tenant API

Signed-off-by: hongming <talonwan@yunify.com>

* refactor IAM API

Signed-off-by: hongming <talonwan@yunify.com>

* refactor IAM API

Signed-off-by: hongming <talonwan@yunify.com>

pkg/models/openpitrix/attachments.go

@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright 2019 The KubeSphere Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * /
+ */
+
+package openpitrix
+
+import (
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/klog"
+	"kubesphere.io/kubesphere/pkg/simple/client/openpitrix"
+	"openpitrix.io/openpitrix/pkg/pb"
+)
+
+type AttachmentInterface interface {
+	DescribeAttachment(id string) (*Attachment, error)
+}
+
+type attachmentOperator struct {
+	opClient openpitrix.Client
+}
+
+func newAttachmentOperator(opClient openpitrix.Client) AttachmentInterface {
+	return &attachmentOperator{
+		opClient: opClient,
+	}
+}
+
+func (c *attachmentOperator) DescribeAttachment(id string) (*Attachment, error) {
+	resp, err := c.opClient.GetAttachments(openpitrix.SystemContext(), &pb.GetAttachmentsRequest{
+		AttachmentId: []string{id},
+	})
+	if err != nil {
+		klog.Error(err)
+		return nil, err
+	}
+	if len(resp.Attachments) > 0 {
+		return convertAttachment(resp.Attachments[id]), nil
+	} else {
+		err := status.New(codes.NotFound, "resource not found").Err()
+		klog.Error(err)
+		return nil, err
+	}
+}