mirror of https://github.com/knative/caching.git
74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
/*
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Copyright 2018 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package duck
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import (
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"encoding/json"
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jsonmergepatch "github.com/evanphx/json-patch"
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"github.com/mattbaird/jsonpatch"
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)
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func marshallBeforeAfter(before, after interface{}) ([]byte, []byte, error) {
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rawBefore, err := json.Marshal(before)
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if err != nil {
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return nil, nil, err
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}
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rawAfter, err := json.Marshal(after)
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if err != nil {
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return rawBefore, nil, err
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}
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return rawBefore, rawAfter, nil
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}
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// CreateMergePatch creates a json merge patch as specified in
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// http://tools.ietf.org/html/draft-ietf-appsawg-json-merge-patch-07
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func CreateMergePatch(before, after interface{}) ([]byte, error) {
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rawBefore, rawAfter, err := marshallBeforeAfter(before, after)
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if err != nil {
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return nil, err
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}
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return jsonmergepatch.CreateMergePatch(rawBefore, rawAfter)
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}
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// CreateBytePatch is a helper function that creates the same content as
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// CreatePatch, but returns in []byte format instead of JSONPatch.
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func CreateBytePatch(before, after interface{}) ([]byte, error) {
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patch, err := CreatePatch(before, after)
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if err != nil {
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return nil, err
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}
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return patch.MarshalJSON()
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}
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// CreatePatch creates a patch as specified in http://jsonpatch.com/
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func CreatePatch(before, after interface{}) (JSONPatch, error) {
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rawBefore, rawAfter, err := marshallBeforeAfter(before, after)
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if err != nil {
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return nil, err
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}
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return jsonpatch.CreatePatch(rawBefore, rawAfter)
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}
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type JSONPatch []jsonpatch.JsonPatchOperation
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func (p JSONPatch) MarshalJSON() ([]byte, error) {
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return json.Marshal([]jsonpatch.JsonPatchOperation(p))
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}
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