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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package template // import "miniflux.app/template"
import (
"bytes"
"html/template"
"time"
"miniflux.app/config"
"miniflux.app/errors"
"miniflux.app/locale"
"miniflux.app/logger"
"github.com/gorilla/mux"
)
// Engine handles the templating system.
type Engine struct {
templates map[string]*template.Template
translator *locale.Translator
funcMap *funcMap
}
func (e *Engine) parseAll() {
commonTemplates := ""
for _, content := range templateCommonMap {
commonTemplates += content
}
for name, content := range templateViewsMap {
logger.Debug("[Template] Parsing: %s", name)
e.templates[name] = template.Must(template.New("main").Funcs(e.funcMap.Map()).Parse(commonTemplates + content))
}
}
// Render process a template and write the ouput.
func (e *Engine) Render(name, language string, data interface{}) []byte {
tpl, ok := e.templates[name]
if !ok {
logger.Fatal("[Template] The template %s does not exists", name)
}
lang := e.translator.GetLanguage(language)
tpl.Funcs(template.FuncMap{
"elapsed": func(timezone string, t time.Time) string {
return elapsedTime(lang, timezone, t)
},
"t": func(key interface{}, args ...interface{}) string {
switch key.(type) {
case string:
return lang.Get(key.(string), args...)
case errors.LocalizedError:
return key.(errors.LocalizedError).Localize(lang)
case *errors.LocalizedError:
return key.(*errors.LocalizedError).Localize(lang)
case error:
return key.(error).Error()
default:
return ""
}
},
"plural": func(key string, n int, args ...interface{}) string {
return lang.Plural(key, n, args...)
},
})
var b bytes.Buffer
err := tpl.ExecuteTemplate(&b, "base", data)
if err != nil {
logger.Fatal("[Template] Unable to render template: %v", err)
}
return b.Bytes()
}
// NewEngine returns a new template engine.
func NewEngine(cfg *config.Config, router *mux.Router, translator *locale.Translator) *Engine {
tpl := &Engine{
templates: make(map[string]*template.Template),
translator: translator,
funcMap: newFuncMap(cfg, router),
}
tpl.parseAll()
return tpl
}
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