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render.go
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render.go
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package request
import (
"fmt"
"html/template"
"net/http"
"time"
"github.com/Nigel2392/router/v3/templates"
)
var DEFAULT_DATA_FUNC func(r *Request)
var TEMPLATE_MANAGER *templates.Manager
// Template configuration must be set before calling this function!
// See the templates package for more information.
func (r *Request) Render(templateName string) error {
if TEMPLATE_MANAGER == nil {
panic("Template manager is nil, please set the template manager before calling Render()")
}
var t, name, err = TEMPLATE_MANAGER.Get(templateName)
if err != nil {
return err
}
return r.RenderTemplate(t, name)
}
// Render a string as a template
func (r *Request) RenderString(templateString string) error {
var t = template.New("string")
t, err := t.Parse(templateString)
if err != nil {
return err
}
// Render template
return r.RenderTemplate(t, "string")
}
// Render a template with the given name
func (r *Request) RenderTemplate(t *template.Template, name string) error {
var err = addDefaultData(r)
if err != nil {
return err
}
// Add default data
if DEFAULT_DATA_FUNC != nil {
DEFAULT_DATA_FUNC(r)
}
// Render template
return t.ExecuteTemplate(r.Response, name, r.Data)
}
// Add default data to the request
func addDefaultData(r *Request) error {
r.Data.Request.Next = r.Next()
// Get the messages from the session
if r.Session != nil {
var messages = r.Session.Get(MESSAGE_COOKIE_NAME)
if messages != nil {
var messagesCasted, ok = messages.(Messages)
if !ok {
return fmt.Errorf("Messages in session are not of type Messages, but %T", messages)
}
r.Data.Messages = append(r.Data.Messages, messagesCasted...)
r.Session.Delete(MESSAGE_COOKIE_NAME)
}
} else {
if cookie, err := r.Request.Cookie(MESSAGE_COOKIE_NAME); err == nil {
(&r.Data.Messages).Decode(cookie.Value)
// Delete the cookie.
http.SetCookie(r.Response, &http.Cookie{
Name: MESSAGE_COOKIE_NAME,
Value: "",
Expires: time.Now().Add(-time.Hour),
})
}
}
return nil
}