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miniflux/template/engine.go
2018-02-04 15:45:07 -08:00

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1.7 KiB
Go

// 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 (
"bytes"
"html/template"
"io"
"github.com/miniflux/miniflux/config"
"github.com/miniflux/miniflux/locale"
"github.com/miniflux/miniflux/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))
}
}
// SetLanguage change the language for template processing.
func (e *Engine) SetLanguage(language string) {
e.funcMap.Language = e.translator.GetLanguage(language)
}
// Execute process a template.
func (e *Engine) Execute(w io.Writer, name string, data interface{}) {
tpl, ok := e.templates[name]
if !ok {
logger.Fatal("[Template] The template %s does not exists", name)
}
var b bytes.Buffer
err := tpl.ExecuteTemplate(&b, "base", data)
if err != nil {
logger.Fatal("[Template] Unable to render template: %v", err)
}
b.WriteTo(w)
}
// 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, translator.GetLanguage("en_US")),
}
tpl.parseAll()
return tpl
}