/
pongor.go
108 lines (96 loc) · 2.33 KB
/
pongor.go
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// Copyright 2015 ipfans
//
// 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 pongor
import (
"io"
"path/filepath"
"sync"
"github.com/flosch/pongo2"
"github.com/insionng/vodka"
)
type PongorOption struct {
// Directory to load templates. Default is "templates"
Directory string
// Reload to reload templates everytime.
Reload bool
}
type Renderer struct {
PongorOption
templates map[string]*pongo2.Template
lock sync.RWMutex
}
func perparOption(options []PongorOption) PongorOption {
var opt PongorOption
if len(options) > 0 {
opt = options[0]
}
if len(opt.Directory) == 0 {
opt.Directory = "templates"
}
return opt
}
func Renderor(opt ...PongorOption) *Renderer {
o := perparOption(opt)
r := &Renderer{
PongorOption: o,
templates: make(map[string]*pongo2.Template),
}
return r
}
/*
func getContext(templateData interface{}) pongo2.Context {
if templateData == nil {
return nil
}
contextData, isMap := templateData.(map[string]interface{})
if isMap {
return contextData
}
return nil
}
*/
func (r *Renderer) buildTemplatesCache(name string) (t *pongo2.Template, err error) {
r.lock.Lock()
defer r.lock.Unlock()
t, err = pongo2.FromFile(filepath.Join(r.Directory, name))
if err != nil {
return
}
r.templates[name] = t
return
}
func (r *Renderer) getTemplate(name string) (t *pongo2.Template, err error) {
name = name + ".html"
if r.Reload {
return pongo2.FromFile(filepath.Join(r.Directory, name))
}
r.lock.RLock()
var ok bool
if t, ok = r.templates[name]; !ok {
r.lock.RUnlock()
t, err = r.buildTemplatesCache(name)
} else {
r.lock.RUnlock()
}
return
}
// Render 渲染
func (r *Renderer) Render(w io.Writer, name string, ctx vodka.Context) error {
template, err := r.getTemplate(name)
if err != nil {
return err
}
err = template.ExecuteWriter(ctx.GetStore(), w)
return err
}