mirror of
https://github.com/gohugoio/hugo.git
synced 2024-05-11 05:54:58 +00:00
128 lines
3.3 KiB
Go
128 lines
3.3 KiB
Go
// Copyright 2015 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 hugolib
|
|
|
|
import (
|
|
"reflect"
|
|
"sort"
|
|
"sync"
|
|
|
|
"github.com/gohugoio/hugo/tpl/math"
|
|
)
|
|
|
|
// Scratch is a writable context used for stateful operations in Page/Node rendering.
|
|
type Scratch struct {
|
|
values map[string]interface{}
|
|
mu sync.RWMutex
|
|
}
|
|
|
|
// Add will, for single values, add (using the + operator) the addend to the existing addend (if found).
|
|
// Supports numeric values and strings.
|
|
//
|
|
// If the first add for a key is an array or slice, then the next value(s) will be appended.
|
|
func (c *Scratch) Add(key string, newAddend interface{}) (string, error) {
|
|
|
|
var newVal interface{}
|
|
c.mu.RLock()
|
|
existingAddend, found := c.values[key]
|
|
c.mu.RUnlock()
|
|
if found {
|
|
var err error
|
|
|
|
addendV := reflect.ValueOf(existingAddend)
|
|
|
|
if addendV.Kind() == reflect.Slice || addendV.Kind() == reflect.Array {
|
|
nav := reflect.ValueOf(newAddend)
|
|
if nav.Kind() == reflect.Slice || nav.Kind() == reflect.Array {
|
|
newVal = reflect.AppendSlice(addendV, nav).Interface()
|
|
} else {
|
|
newVal = reflect.Append(addendV, nav).Interface()
|
|
}
|
|
} else {
|
|
newVal, err = math.DoArithmetic(existingAddend, newAddend, '+')
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
} else {
|
|
newVal = newAddend
|
|
}
|
|
c.mu.Lock()
|
|
c.values[key] = newVal
|
|
c.mu.Unlock()
|
|
return "", nil // have to return something to make it work with the Go templates
|
|
}
|
|
|
|
// Set stores a value with the given key in the Node context.
|
|
// This value can later be retrieved with Get.
|
|
func (c *Scratch) Set(key string, value interface{}) string {
|
|
c.mu.Lock()
|
|
c.values[key] = value
|
|
c.mu.Unlock()
|
|
return ""
|
|
}
|
|
|
|
// Get returns a value previously set by Add or Set
|
|
func (c *Scratch) Get(key string) interface{} {
|
|
c.mu.RLock()
|
|
val := c.values[key]
|
|
c.mu.RUnlock()
|
|
|
|
return val
|
|
}
|
|
|
|
// SetInMap stores a value to a map with the given key in the Node context.
|
|
// This map can later be retrieved with GetSortedMapValues.
|
|
func (c *Scratch) SetInMap(key string, mapKey string, value interface{}) string {
|
|
c.mu.Lock()
|
|
_, found := c.values[key]
|
|
if !found {
|
|
c.values[key] = make(map[string]interface{})
|
|
}
|
|
|
|
c.values[key].(map[string]interface{})[mapKey] = value
|
|
c.mu.Unlock()
|
|
return ""
|
|
}
|
|
|
|
// GetSortedMapValues returns a sorted map previously filled with SetInMap
|
|
func (c *Scratch) GetSortedMapValues(key string) interface{} {
|
|
c.mu.RLock()
|
|
|
|
if c.values[key] == nil {
|
|
c.mu.RUnlock()
|
|
return nil
|
|
}
|
|
|
|
unsortedMap := c.values[key].(map[string]interface{})
|
|
c.mu.RUnlock()
|
|
var keys []string
|
|
for mapKey := range unsortedMap {
|
|
keys = append(keys, mapKey)
|
|
}
|
|
|
|
sort.Strings(keys)
|
|
|
|
sortedArray := make([]interface{}, len(unsortedMap))
|
|
for i, mapKey := range keys {
|
|
sortedArray[i] = unsortedMap[mapKey]
|
|
}
|
|
|
|
return sortedArray
|
|
}
|
|
|
|
func newScratch() *Scratch {
|
|
return &Scratch{values: make(map[string]interface{})}
|
|
}
|