/
menus.go
135 lines (119 loc) · 3.47 KB
/
menus.go
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// Copyright 2016 NDP Systèmes. 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 menus
import (
"sort"
"strconv"
"sync"
"github.com/beevik/etree"
"github.com/labneco/doxa/doxa/actions"
)
// Registry is the menu Collection of the application
var (
Registry *Collection
bootstrapMap map[string]*Menu
)
// A Collection is a hierarchical and sortable Collection of menus
type Collection struct {
sync.RWMutex
Menus []*Menu
menusMap map[string]*Menu
}
func (mc *Collection) Len() int {
return len(mc.Menus)
}
func (mc *Collection) Swap(i, j int) {
mc.Menus[i], mc.Menus[j] = mc.Menus[j], mc.Menus[i]
}
func (mc *Collection) Less(i, j int) bool {
return mc.Menus[i].Sequence < mc.Menus[j].Sequence
}
// Add adds a menu to the menu Collection
func (mc *Collection) Add(m *Menu) {
if m.Action != nil {
m.HasAction = true
}
var targetCollection *Collection
if m.Parent != nil {
if m.Parent.Children == nil {
m.Parent.Children = NewCollection()
}
targetCollection = m.Parent.Children
m.Parent.HasChildren = true
} else {
targetCollection = mc
}
m.ParentCollection = targetCollection
targetCollection.Menus = append(targetCollection.Menus, m)
sort.Sort(targetCollection)
// We add the menu to the Registry which is the top collection
mc.Lock()
defer mc.Unlock()
Registry.menusMap[m.ID] = m
}
// GetByID returns the Menu with the given id
func (mc *Collection) GetByID(id string) *Menu {
return mc.menusMap[id]
}
// NewCollection returns a pointer to a new
// Collection instance
func NewCollection() *Collection {
res := Collection{
menusMap: make(map[string]*Menu),
}
return &res
}
// A Menu is the representation of a single menu item
type Menu struct {
ID string
Name string
ParentID string
Parent *Menu
ParentCollection *Collection
Children *Collection
Sequence uint8
ActionID string
Action *actions.Action
HasChildren bool
HasAction bool
names map[string]string
}
// TranslatedName returns the translated name of this menu
// in the given language
func (m Menu) TranslatedName(lang string) string {
res, ok := m.names[lang]
if !ok {
res = m.Name
}
return res
}
// LoadFromEtree reads the menu given etree.Element, creates or updates the menu
// and adds it to the menu registry if it not already.
func LoadFromEtree(element *etree.Element) {
AddMenuToMapFromEtree(element, bootstrapMap)
}
// AddMenuToMapFromEtree reads the menu from the given element
// and adds it to the given map.
func AddMenuToMapFromEtree(element *etree.Element, mMap map[string]*Menu) map[string]*Menu {
seq, _ := strconv.Atoi(element.SelectAttrValue("sequence", "10"))
menu := Menu{
ID: element.SelectAttrValue("id", "NO_ID"),
ActionID: element.SelectAttrValue("action", ""),
Name: element.SelectAttrValue("name", ""),
ParentID: element.SelectAttrValue("parent", ""),
Sequence: uint8(seq),
}
mMap[menu.ID] = &menu
return mMap
}