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render.go
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render.go
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// Copyright 2014 GoIncremental Limited. 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 web
import (
"encoding/xml"
"html/template"
"net/http"
"strconv"
"time"
"github.com/goincremental/dal"
"github.com/unrolled/render"
)
type Renderer interface {
XML(w http.ResponseWriter, status int, v interface{})
HTML(w http.ResponseWriter, status int, name string, binding interface{})
JSON(w http.ResponseWriter, status int, v interface{})
}
type renderer struct {
renderer *render.Render
}
func (r *renderer) HTML(w http.ResponseWriter, status int, name string, binding interface{}) {
r.renderer.HTML(w, status, name, binding)
}
func (r *renderer) XML(w http.ResponseWriter, status int, v interface{}) {
r.renderer.XML(w, status, v)
}
func (r *renderer) JSON(w http.ResponseWriter, status int, v interface{}) {
r.renderer.JSON(w, status, v)
}
func getDateString(d time.Time) string {
if d.IsZero() {
return "Date TBC"
}
year, month, day := d.Date()
suffix := "th"
switch day % 10 {
case 1:
if day%100 != 11 {
suffix = "st"
}
case 2:
if day%100 != 12 {
suffix = "nd"
}
case 3:
if day%100 != 13 {
suffix = "rd"
}
}
return d.Weekday().String() + " " + strconv.Itoa(day) + suffix + " " +
month.String() + " " + strconv.Itoa(year)
}
func getID(ID dal.ObjectID) string {
return ID.Hex()
}
func add(x, y int) int {
return x + y
}
func NewRenderer() Renderer {
r := render.New(render.Options{
Layout: "index",
Delims: render.Delims{"[[", "]]"},
PrefixXML: []byte(xml.Header),
Funcs: []template.FuncMap{
{
"AsHTML": func(s string) template.HTML {
return template.HTML(s)
},
"AsDate": getDateString,
"AsID": getID,
"Add": add,
},
},
})
return &renderer{renderer: r}
}