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| 1 | +/* |
| 2 | +Copyright 2023 The Karmada Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package clusterresourcebinding |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "encoding/json" |
| 22 | + "net/http" |
| 23 | + |
| 24 | + "github.com/google/uuid" |
| 25 | + "k8s.io/klog/v2" |
| 26 | + "sigs.k8s.io/controller-runtime/pkg/webhook/admission" |
| 27 | + |
| 28 | + workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2" |
| 29 | + "github.com/karmada-io/karmada/pkg/util" |
| 30 | +) |
| 31 | + |
| 32 | +// MutatingAdmission mutates API request if necessary. |
| 33 | +type MutatingAdmission struct { |
| 34 | + Decoder *admission.Decoder |
| 35 | +} |
| 36 | + |
| 37 | +// Check if our MutatingAdmission implements necessary interface |
| 38 | +var _ admission.Handler = &MutatingAdmission{} |
| 39 | + |
| 40 | +// Handle yields a response to an AdmissionRequest. |
| 41 | +func (a *MutatingAdmission) Handle(_ context.Context, req admission.Request) admission.Response { |
| 42 | + crb := &workv1alpha2.ClusterResourceBinding{} |
| 43 | + |
| 44 | + err := a.Decoder.Decode(req, crb) |
| 45 | + if err != nil { |
| 46 | + return admission.Errored(http.StatusBadRequest, err) |
| 47 | + } |
| 48 | + klog.V(2).Infof("Mutating clusterResourceBinding(%s) for request: %s", crb.Name, req.Operation) |
| 49 | + |
| 50 | + if util.GetLabelValue(crb.Labels, workv1alpha2.ClusterResourceBindingPermanentIDLabel) == "" { |
| 51 | + util.MergeLabel(crb, workv1alpha2.ClusterResourceBindingPermanentIDLabel, uuid.New().String()) |
| 52 | + } |
| 53 | + |
| 54 | + marshaledBytes, err := json.Marshal(crb) |
| 55 | + if err != nil { |
| 56 | + return admission.Errored(http.StatusInternalServerError, err) |
| 57 | + } |
| 58 | + |
| 59 | + return admission.PatchResponseFromRaw(req.Object.Raw, marshaledBytes) |
| 60 | +} |
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