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84 lines
2.0 KiB
84 lines
2.0 KiB
//
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// DISCLAIMER
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//
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// Copyright 2017 ArangoDB GmbH, Cologne, Germany
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// Copyright holder is ArangoDB GmbH, Cologne, Germany
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//
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// Author Ewout Prangsma
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//
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package http
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import (
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"encoding/json"
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driver "github.com/arangodb/go-driver"
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)
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// mergeObject is a helper used to merge 2 objects into JSON.
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type mergeObject struct {
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Object interface{}
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Merge interface{}
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}
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func (m mergeObject) MarshalJSON() ([]byte, error) {
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m1, err := toMap(m.Object)
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if err != nil {
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return nil, driver.WithStack(err)
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}
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m2, err := toMap(m.Merge)
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if err != nil {
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return nil, driver.WithStack(err)
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}
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var merged map[string]interface{}
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// If m1 an empty object?
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if len(m1) == 0 {
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merged = m2
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} else if len(m2) == 0 {
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merged = m1
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} else {
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// Merge
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merged = make(map[string]interface{})
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for k, v := range m1 {
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merged[k] = v
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}
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for k, v := range m2 {
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merged[k] = v
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}
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}
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// Marshal merged map
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data, err := json.Marshal(merged)
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if err != nil {
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return nil, driver.WithStack(err)
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}
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return data, nil
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}
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// toMap converts the given object to a map (using JSON marshal/unmarshal when needed)
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func toMap(object interface{}) (map[string]interface{}, error) {
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if m, ok := object.(map[string]interface{}); ok {
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return m, nil
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}
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data, err := json.Marshal(object)
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if err != nil {
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return nil, driver.WithStack(err)
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}
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var m map[string]interface{}
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if err := json.Unmarshal(data, &m); err != nil {
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return nil, driver.WithStack(err)
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}
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return m, nil
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}
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