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// Copyright 2017-present The Hugo Authors. All rights reserved.
//
// 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 docshelper provides some helpers for the Hugo documentation, and
// is of limited interest for the general Hugo user.
package docshelper
import (
"encoding/json"
)
// DocProviders contains all DocProviders added to the system.
var DocProviders = make(map[string]DocProvider)
// AddDocProvider adds or updates the DocProvider for a given name.
func AddDocProvider(name string, provider DocProvider) {
if prev, ok := DocProviders[name]; !ok {
DocProviders[name] = provider
} else {
DocProviders[name] = merge(prev, provider)
}
}
// DocProvider is used to save arbitrary JSON data
// used for the generation of the documentation.
type DocProvider func() map[string]interface{}
// MarshalJSON returns a JSON representation of the DocProvider.
func (d DocProvider) MarshalJSON() ([]byte, error) {
return json.MarshalIndent(d(), "", " ")
}
func merge(a, b DocProvider) DocProvider {
next := a()
for k, v := range b() {
next[k] = v
}
return func() map[string]interface{} {
return next
}
}
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