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124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
package renderer
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import (
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"io/ioutil"
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"net/http"
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"os"
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"text/template"
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"github.com/caos/zitadel/internal/errors"
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"github.com/caos/zitadel/internal/i18n"
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"github.com/caos/logging"
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"golang.org/x/text/language"
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)
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const (
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TranslateFn = "t"
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templatesPath = "/templates"
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)
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type Renderer struct {
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Templates map[string]*template.Template
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translator *i18n.Translator
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}
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func NewRenderer(dir http.FileSystem, tmplMapping map[string]string, funcs map[string]interface{}, translatorConfig i18n.TranslatorConfig) (*Renderer, error) {
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var err error
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r := new(Renderer)
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r.translator, err = i18n.NewTranslator(dir, translatorConfig)
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if err != nil {
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return nil, err
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}
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err = r.loadTemplates(dir, tmplMapping, funcs)
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if err != nil {
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return nil, err
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}
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return r, nil
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}
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func (r *Renderer) RenderTemplate(w http.ResponseWriter, req *http.Request, tmpl *template.Template, data interface{}, reqFuncs map[string]interface{}) {
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reqFuncs = r.registerTranslateFn(req, reqFuncs)
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if err := tmpl.Funcs(reqFuncs).Execute(w, data); err != nil {
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logging.Log("RENDE-lF8F6w").WithError(err).WithField("template", tmpl.Name).Error("error rendering template")
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}
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}
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func (r *Renderer) Localize(id string, args map[string]interface{}) string {
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return r.translator.Localize(id, args)
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}
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func (r *Renderer) LocalizeFromRequest(req *http.Request, id string, args map[string]interface{}) string {
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return r.translator.LocalizeFromRequest(req, id, args)
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}
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func (r *Renderer) Lang(req *http.Request) language.Tag {
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return r.translator.Lang(req)
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}
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func (r *Renderer) loadTemplates(dir http.FileSystem, tmplMapping map[string]string, funcs map[string]interface{}) error {
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funcs = r.registerTranslateFn(nil, funcs)
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funcs[TranslateFn] = func(id string, args ...interface{}) string {
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return id
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}
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templatesDir, err := dir.Open(templatesPath)
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if err != nil {
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return errors.ThrowNotFound(err, "RENDE-G3aea", "path not found")
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}
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defer templatesDir.Close()
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files, err := templatesDir.Readdir(0)
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if err != nil {
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return errors.ThrowNotFound(err, "RENDE-dfR33", "cannot read dir")
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}
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tmpl := template.New("")
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for _, file := range files {
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if err := r.addFileToTemplate(dir, tmpl, tmplMapping, funcs, file); err != nil {
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return errors.ThrowNotFound(err, "RENDE-dfTe1", "cannot append file to templates")
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}
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}
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r.Templates = make(map[string]*template.Template, len(tmplMapping))
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for name, file := range tmplMapping {
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r.Templates[name] = tmpl.Lookup(file)
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}
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return nil
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}
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func (r *Renderer) addFileToTemplate(dir http.FileSystem, tmpl *template.Template, tmplMapping map[string]string, funcs map[string]interface{}, file os.FileInfo) error {
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f, err := dir.Open(templatesPath + "/" + file.Name())
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if err != nil {
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return err
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}
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defer f.Close()
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content, err := ioutil.ReadAll(f)
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if err != nil {
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return err
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}
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tmpl, err = tmpl.New(file.Name()).Funcs(funcs).Parse(string(content))
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if err != nil {
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return err
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}
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return nil
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}
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func (r *Renderer) registerTranslateFn(req *http.Request, funcs map[string]interface{}) map[string]interface{} {
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if funcs == nil {
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funcs = make(map[string]interface{})
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}
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funcs[TranslateFn] = func(id string, args ...interface{}) string {
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m := map[string]interface{}{}
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var key string
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for i, arg := range args {
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if i%2 == 0 {
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key = arg.(string)
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continue
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}
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m[key] = arg
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}
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if r == nil {
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return r.Localize(id, m)
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}
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return r.LocalizeFromRequest(req, id, m)
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}
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return funcs
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}
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