ref: 2079a23dd89734cea39e523faf46e44201151279
dir: /hugolib/multilingual.go/
package hugolib
import (
"sync"
"sort"
"strings"
"errors"
"fmt"
"github.com/spf13/cast"
"github.com/spf13/viper"
)
type Language struct {
Lang string
Title string
Weight int
params map[string]interface{}
paramsInit sync.Once
}
func NewLanguage(lang string) *Language {
return &Language{Lang: lang, params: make(map[string]interface{})}
}
func newDefaultLanguage() *Language {
defaultLang := viper.GetString("DefaultContentLanguage")
if defaultLang == "" {
defaultLang = "en"
}
return NewLanguage(defaultLang)
}
type Languages []*Language
func NewLanguages(l ...*Language) Languages {
languages := make(Languages, len(l))
for i := 0; i < len(l); i++ {
languages[i] = l[i]
}
sort.Sort(languages)
return languages
}
func (l Languages) Len() int { return len(l) }
func (l Languages) Less(i, j int) bool { return l[i].Weight < l[j].Weight }
func (l Languages) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
type Multilingual struct {
Languages Languages
DefaultLang *Language
langMap map[string]*Language
langMapInit sync.Once
}
func (ml *Multilingual) Language(lang string) *Language {
ml.langMapInit.Do(func() {
ml.langMap = make(map[string]*Language)
for _, l := range ml.Languages {
ml.langMap[l.Lang] = l
}
})
return ml.langMap[lang]
}
func newMultiLingualFromSites(sites ...*Site) (*Multilingual, error) {
languages := make(Languages, len(sites))
for i, s := range sites {
if s.Language == nil {
return nil, errors.New("Missing language for site")
}
languages[i] = s.Language
}
return &Multilingual{Languages: languages, DefaultLang: newDefaultLanguage()}, nil
}
func newMultiLingualDefaultLanguage() *Multilingual {
return newMultiLingualForLanguage(newDefaultLanguage())
}
func newMultiLingualForLanguage(language *Language) *Multilingual {
languages := Languages{language}
return &Multilingual{Languages: languages, DefaultLang: language}
}
func (ml *Multilingual) enabled() bool {
return len(ml.Languages) > 1
}
func (l *Language) Params() map[string]interface{} {
l.paramsInit.Do(func() {
// Merge with global config.
// TODO(bep) consider making this part of a constructor func.
globalParams := viper.GetStringMap("Params")
for k, v := range globalParams {
if _, ok := l.params[k]; !ok {
l.params[k] = v
}
}
})
return l.params
}
func (l *Language) SetParam(k string, v interface{}) {
l.params[k] = v
}
func (l *Language) GetString(key string) string { return cast.ToString(l.Get(key)) }
func (ml *Language) GetStringMap(key string) map[string]interface{} {
return cast.ToStringMap(ml.Get(key))
}
func (l *Language) GetStringMapString(key string) map[string]string {
return cast.ToStringMapString(l.Get(key))
}
func (l *Language) Get(key string) interface{} {
if l == nil {
panic("language not set")
}
key = strings.ToLower(key)
if v, ok := l.params[key]; ok {
return v
}
return viper.Get(key)
}
func (s *Site) multilingualEnabled() bool {
return s.Multilingual != nil && s.Multilingual.enabled()
}
// TODO(bep) multilingo remove these
func (s *Site) currentLanguageString() string {
return s.currentLanguage().Lang
}
func (s *Site) currentLanguage() *Language {
return s.Language
}
func toSortedLanguages(l map[string]interface{}) (Languages, error) {
langs := make(Languages, len(l))
i := 0
for lang, langConf := range l {
langsMap, ok := langConf.(map[string]interface{})
if !ok {
return nil, fmt.Errorf("Language config is not a map: %v", langsMap)
}
language := NewLanguage(lang)
for k, v := range langsMap {
loki := strings.ToLower(k)
switch loki {
case "title":
language.Title = cast.ToString(v)
case "weight":
language.Weight = cast.ToInt(v)
}
// Put all into the Params map
// TODO(bep) ml reconsile with the type handling etc. from other params handlers.
language.SetParam(loki, v)
}
langs[i] = language
i++
}
sort.Sort(langs)
return langs, nil
}