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// Copyright 2024 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 media
import (
"errors"
"fmt"
"reflect"
"sort"
"strings"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/config"
"github.com/mitchellh/mapstructure"
"github.com/spf13/cast"
)
// DefaultTypes is the default media types supported by Hugo.
var DefaultTypes Types
func init() {
ns, err := DecodeTypes(nil)
if err != nil {
panic(err)
}
DefaultTypes = ns.Config
// Initialize the Builtin types with values from DefaultTypes.
v := reflect.ValueOf(&Builtin).Elem()
for i := 0; i < v.NumField(); i++ {
f := v.Field(i)
builtinType := f.Interface().(Type)
defaultType, found := DefaultTypes.GetByType(builtinType.Type)
if !found {
panic(errors.New("missing default type for builtin type: " + builtinType.Type))
}
f.Set(reflect.ValueOf(defaultType))
}
}
// Hold the configuration for a given media type.
type MediaTypeConfig struct {
// The file suffixes used for this media type.
Suffixes []string
// Delimiter used before suffix.
Delimiter string
}
// DecodeTypes decodes the given map of media types.
func DecodeTypes(in map[string]any) (*config.ConfigNamespace[map[string]MediaTypeConfig, Types], error) {
buildConfig := func(v any) (Types, any, error) {
m, err := maps.ToStringMapE(v)
if err != nil {
return nil, nil, err
}
if m == nil {
m = map[string]any{}
}
m = maps.CleanConfigStringMap(m)
// Merge with defaults.
maps.MergeShallow(m, defaultMediaTypesConfig)
var types Types
for k, v := range m {
mediaType, err := FromString(k)
if err != nil {
return nil, nil, err
}
if err := mapstructure.WeakDecode(v, &mediaType); err != nil {
return nil, nil, err
}
mm := maps.ToStringMap(v)
suffixes, found := maps.LookupEqualFold(mm, "suffixes")
if found {
mediaType.SuffixesCSV = strings.TrimSpace(strings.ToLower(strings.Join(cast.ToStringSlice(suffixes), ",")))
}
if mediaType.SuffixesCSV != "" && mediaType.Delimiter == "" {
mediaType.Delimiter = DefaultDelimiter
}
InitMediaType(&mediaType)
types = append(types, mediaType)
}
sort.Sort(types)
return types, m, nil
}
ns, err := config.DecodeNamespace[map[string]MediaTypeConfig](in, buildConfig)
if err != nil {
return nil, fmt.Errorf("failed to decode media types: %w", err)
}
return ns, nil
}
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