hugo/resources/page/page_matcher.go

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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 (
"fmt"
"path/filepath"
"strings"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/config"
"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
// A Glob pattern matching the Page's Environment, e.g. "{production,development}".
Environment 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
}
}
if m.Environment != "" {
g, err := glob.GetGlob(m.Environment)
if err == nil && !g.Match(p.Site().Hugo().Environment) {
return false
}
}
return true
}
func DecodeCascadeConfig(in any) (*config.ConfigNamespace[[]PageMatcherParamsConfig, map[PageMatcher]maps.Params], error) {
buildConfig := func(in any) (map[PageMatcher]maps.Params, any, error) {
cascade := make(map[PageMatcher]maps.Params)
if in == nil {
return cascade, []map[string]any{}, nil
}
ms, err := maps.ToSliceStringMap(in)
if err != nil {
return nil, nil, err
}
var cfgs []PageMatcherParamsConfig
for _, m := range ms {
m = maps.CleanConfigStringMap(m)
c, err := mapToPageMatcherParamsConfig(m)
if err != nil {
return nil, nil, err
}
cfgs = append(cfgs, c)
}
for _, cfg := range cfgs {
m := cfg.Target
c, found := cascade[m]
if found {
// Merge
for k, v := range cfg.Params {
if _, found := c[k]; !found {
c[k] = v
}
}
} else {
cascade[m] = cfg.Params
}
}
return cascade, cfgs, nil
}
return config.DecodeNamespace[[]PageMatcherParamsConfig](in, buildConfig)
}
// DecodeCascade decodes in which could be either a map or a slice of maps.
func DecodeCascade(in any) (map[PageMatcher]maps.Params, error) {
conf, err := DecodeCascadeConfig(in)
if err != nil {
return nil, err
}
return conf.Config, nil
}
func mapToPageMatcherParamsConfig(m map[string]any) (PageMatcherParamsConfig, error) {
var pcfg PageMatcherParamsConfig
for k, v := range m {
switch strings.ToLower(k) {
case "params":
// We simplified the structure of the cascade config in Hugo 0.111.0.
// There is a small chance that someone has used the old structure with the params keyword,
// those values will now be moved to the top level.
// This should be very unlikely as it would lead to constructs like .Params.params.foo,
// and most people see params as an Hugo internal keyword.
pcfg.Params = maps.ToStringMap(v)
case "_target", "target":
var target PageMatcher
if err := decodePageMatcher(v, &target); err != nil {
return pcfg, err
}
pcfg.Target = target
default:
// Legacy config.
if pcfg.Params == nil {
pcfg.Params = make(maps.Params)
}
pcfg.Params[k] = v
}
}
return pcfg, pcfg.init()
}
// decodePageMatcher decodes m into v.
func decodePageMatcher(m any, v *PageMatcher) error {
if err := mapstructure.WeakDecode(m, v); err != nil {
return err
}
v.Kind = strings.ToLower(v.Kind)
if v.Kind != "" {
g, _ := glob.GetGlob(v.Kind)
found := false
for _, k := range kindMap {
if g.Match(k) {
found = true
break
}
}
if !found {
return fmt.Errorf("%q did not match a valid Page Kind", v.Kind)
}
}
v.Path = filepath.ToSlash(strings.ToLower(v.Path))
return nil
}
type PageMatcherParamsConfig struct {
// Apply Params to all Pages matching Target.
Params maps.Params
Target PageMatcher
}
func (p *PageMatcherParamsConfig) init() error {
maps.PrepareParams(p.Params)
return nil
}