69 lines
1.2 KiB
Go
69 lines
1.2 KiB
Go
package component
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import (
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"html/template"
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"net/http"
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"sync/atomic"
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)
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// Menuable is a component that provides a menu
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type Menuable interface {
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Component
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Menu(r *http.Request) []MenuItem
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}
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type MenuItem struct {
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Title string
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Path template.URL
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Active bool
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Priority MenuPriority
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replaceID uint64 // internal id used to replace an item
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}
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var dummyCounter uint64
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// DummyMenuItem creates a new Dummy Menu Item to be replaced
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func DummyMenuItem() MenuItem {
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return MenuItem{
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replaceID: atomic.AddUint64(&dummyCounter, 1),
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}
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}
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// ReplaceWith replaces this MenuItem with a different MenuItem.
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// This method returns true if an appropriate DummyMenuItem exists.
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func (mi MenuItem) ReplaceWith(new MenuItem, items []MenuItem) bool {
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if mi.replaceID == 0 {
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// never replace non-dummy items
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return false
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}
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for i, item := range items {
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if mi.replaceID == item.replaceID {
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items[i] = new
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return true
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}
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}
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return false
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}
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func MenuItemSort(a, b MenuItem) int {
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return int(a.Priority) - int(b.Priority)
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}
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type MenuPriority int
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// Menu* indicates priorities of the menu
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const (
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MenuHome MenuPriority = iota
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MenuNews
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MenuResolver
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MenuUser
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MenuAdmin
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MenuAuth
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)
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const (
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SmallButton MenuPriority = -1
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)
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