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// Copyright 2020 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 page
import (
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/hugofs/glob"
"github.com/mitchellh/mapstructure"
)
// A PageMatcher can be used to match a Page with Glob patterns.
// Note that the pattern matching is case insensitive.
type PageMatcher struct {
// A Glob pattern matching the content path below /content.
// Expects Unix-styled slashes.
// Note that this is the virtual path, so it starts at the mount root
// with a leading "/".
Path string
// A Glob pattern matching the Page's Kind(s), e.g. "{home,section}"
Kind string
// A Glob pattern matching the Page's language, e.g. "{en,sv}".
Lang string
}
// Matches returns whether p matches this matcher.
func (m PageMatcher) Matches(p Page) bool {
if m.Kind != "" {
g, err := glob.GetGlob(m.Kind)
if err == nil && !g.Match(p.Kind()) {
return false
}
}
if m.Lang != "" {
g, err := glob.GetGlob(m.Lang)
if err == nil && !g.Match(p.Lang()) {
return false
}
}
if m.Path != "" {
g, err := glob.GetGlob(m.Path)
// TODO(bep) Path() vs filepath vs leading slash.
p := strings.ToLower(filepath.ToSlash(p.Pathc()))
if !(strings.HasPrefix(p, "/")) {
p = "/" + p
}
if err == nil && !g.Match(p) {
return false
}
}
return true
}
// DecodeCascade decodes in which could be eiter a map or a slice of maps.
func DecodeCascade(in interface{}) (map[PageMatcher]maps.Params, error) {
m, err := maps.ToSliceStringMap(in)
if err != nil {
return map[PageMatcher]maps.Params{
{}: maps.ToStringMap(in),
}, nil
}
cascade := make(map[PageMatcher]maps.Params)
for _, vv := range m {
var m PageMatcher
if mv, found := vv["_target"]; found {
err := DecodePageMatcher(mv, &m)
if err != nil {
return nil, err
}
}
c, found := cascade[m]
if found {
// Merge
for k, v := range vv {
if _, found := c[k]; !found {
c[k] = v
}
}
} else {
cascade[m] = vv
}
}
return cascade, nil
}
// DecodePageMatcher decodes m into v.
func DecodePageMatcher(m interface{}, v *PageMatcher) error {
if err := mapstructure.WeakDecode(m, v); err != nil {
return err
}
v.Kind = strings.ToLower(v.Kind)
if v.Kind != "" {
if _, found := kindMap[v.Kind]; !found {
return errors.Errorf("%q is not a valid Page Kind", v.Kind)
}
}
v.Path = filepath.ToSlash(strings.ToLower(v.Path))
return nil
}
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