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// Copyright 2017 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 i18n
import (
"errors"
"github.com/gohugoio/hugo/common/herrors"
"github.com/gohugoio/hugo/deps"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/source"
"github.com/nicksnyder/go-i18n/i18n/bundle"
"github.com/nicksnyder/go-i18n/i18n/language"
_errors "github.com/pkg/errors"
)
// TranslationProvider provides translation handling, i.e. loading
// of bundles etc.
type TranslationProvider struct {
t Translator
}
// NewTranslationProvider creates a new translation provider.
func NewTranslationProvider() *TranslationProvider {
return &TranslationProvider{}
}
// Update updates the i18n func in the provided Deps.
func (tp *TranslationProvider) Update(d *deps.Deps) error {
spec := source.NewSourceSpec(d.PathSpec, nil)
i18nBundle := bundle.New()
en := language.GetPluralSpec("en")
if en == nil {
return errors.New("the English language has vanished like an old oak table")
}
var newLangs []string
for _, dir := range d.BaseFs.I18n.Dirs {
src := spec.NewFilesystemFromFileMetaInfo(dir)
files, err := src.Files()
if err != nil {
return err
}
for _, r := range files {
currentSpec := language.GetPluralSpec(r.BaseFileName())
if currentSpec == nil {
// This may is a language code not supported by go-i18n, it may be
// Klingon or ... not even a fake language. Make sure it works.
newLangs = append(newLangs, r.BaseFileName())
}
}
if len(newLangs) > 0 {
language.RegisterPluralSpec(newLangs, en)
}
// The source files are ordered so the most important comes first. Since this is a
// last key win situation, we have to reverse the iteration order.
for i := len(files) - 1; i >= 0; i-- {
if err := addTranslationFile(i18nBundle, files[i]); err != nil {
return err
}
}
}
tp.t = NewTranslator(i18nBundle, d.Cfg, d.Log)
d.Translate = tp.t.Func(d.Language.Lang)
return nil
}
func addTranslationFile(bundle *bundle.Bundle, r source.File) error {
f, err := r.FileInfo().Meta().Open()
if err != nil {
return _errors.Wrapf(err, "failed to open translations file %q:", r.LogicalName())
}
err = bundle.ParseTranslationFileBytes(r.LogicalName(), helpers.ReaderToBytes(f))
f.Close()
if err != nil {
return errWithFileContext(_errors.Wrapf(err, "failed to load translations"), r)
}
return nil
}
// Clone sets the language func for the new language.
func (tp *TranslationProvider) Clone(d *deps.Deps) error {
d.Translate = tp.t.Func(d.Language.Lang)
return nil
}
func errWithFileContext(inerr error, r source.File) error {
fim, ok := r.FileInfo().(hugofs.FileMetaInfo)
if !ok {
return inerr
}
meta := fim.Meta()
realFilename := meta.Filename()
f, err := meta.Open()
if err != nil {
return inerr
}
defer f.Close()
err, _ = herrors.WithFileContext(
inerr,
realFilename,
f,
herrors.SimpleLineMatcher)
return err
}
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