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// Copyright 2019 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 (
"github.com/gohugoio/hugo/common/types"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/resources/page"
)
type pageTree struct {
p *pageState
}
func (pt pageTree) IsAncestor(other interface{}) (bool, error) {
if pt.p == nil {
return false, nil
}
pp, err := unwrapPage(other)
if err != nil || pp == nil {
return false, err
}
if pt.p.Kind() == page.KindPage && len(pt.p.SectionsEntries()) == len(pp.SectionsEntries()) {
// A regular page is never its section's ancestor.
return false, nil
}
return helpers.HasStringsPrefix(pp.SectionsEntries(), pt.p.SectionsEntries()), nil
}
func (pt pageTree) CurrentSection() page.Page {
p := pt.p
if p.IsHome() || p.IsSection() {
return p
}
return p.Parent()
}
func (pt pageTree) IsDescendant(other interface{}) (bool, error) {
if pt.p == nil {
return false, nil
}
pp, err := unwrapPage(other)
if err != nil || pp == nil {
return false, err
}
if pp.Kind() == page.KindPage && len(pt.p.SectionsEntries()) == len(pp.SectionsEntries()) {
// A regular page is never its section's descendant.
return false, nil
}
return helpers.HasStringsPrefix(pt.p.SectionsEntries(), pp.SectionsEntries()), nil
}
func (pt pageTree) FirstSection() page.Page {
p := pt.p
parent := p.Parent()
if types.IsNil(parent) || parent.IsHome() {
return p
}
for {
current := parent
parent = parent.Parent()
if types.IsNil(parent) || parent.IsHome() {
return current
}
}
}
func (pt pageTree) InSection(other interface{}) (bool, error) {
if pt.p == nil || types.IsNil(other) {
return false, nil
}
pp, err := unwrapPage(other)
if err != nil {
return false, err
}
if pp == nil {
return false, nil
}
return pp.CurrentSection().Eq(pt.p.CurrentSection()), nil
}
func (pt pageTree) Page() page.Page {
return pt.p
}
func (pt pageTree) Parent() page.Page {
return pt.p.parent
}
func (pt pageTree) Sections() page.Pages {
return pt.p.subSections
}
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