"github.com/pressly/chi/_examples/versions/presenter/v3"
"github.com/pressly/chi/render"
)
// Article presented in API version 2.
type Article struct {
*v3.Article `json:",inline" xml:",inline"`
// Additional fields.
SelfURL string `json:"self_url" xml:"self_url"`
// Omitted fields.
URL interface{} `json:"url,omitempty" xml:"url,omitempty"`
}
var Presenter = render.NewPresenter(ArticleV3ToV2)
func init() {
Presenter.CopyFrom(v3.Presenter)
}
func ArticleV3ToV2(r *http.Request, from *v3.Article) (*Article, error) {
to := &Article{
Article: from,
SelfURL: fmt.Sprintf("http://localhost:3333/v2?id=%v", from.ID),
}
to.APIVersion = "v2"
return to, nil
}
// Article presented in API version 2.
type Article struct {
*data.Article `json:",inline" xml:",inline"`
// Additional fields.
URL string `json:"url" xml:"url"`
ViewsCount int64 `json:"views_count" xml:"views_count"`
APIVersion string `json:"api_version" xml:"api_version"`
// Omitted fields.
// Show custom_data explicitly for auth'd users only.
CustomDataForAuthUsers interface{} `json:"custom_data,omitempty" xml:"custom_data,omitempty"`
}
var Presenter = render.NewPresenter(CatchAll, ArticleToV3, ArticleChanToV3Chan, ArticleSliceToV3Slice)
func ArticleToV3(r *http.Request, from *data.Article) (*Article, error) {
log.Printf("item presenter!")
rand.Seed(time.Now().Unix())
to := &Article{
Article: from,
ViewsCount: rand.Int63n(100000),
URL: fmt.Sprintf("http://localhost:3333/v3/?id=%v", from.ID),
APIVersion: "v3",
}
// Only show to auth'd user.
if _, ok := r.Context().Value("auth").(bool); ok {
to.CustomDataForAuthUsers = from.CustomDataForAuthUsers
}
import (
"fmt"
"net/http"
"github.com/pressly/chi/_examples/versions/presenter/v2"
"github.com/pressly/chi/render"
)
// Article presented in API version 1.
type Article struct {
*v2.Article `json:",inline" xml:",inline"`
Data map[string]bool `json:"data" xml:"data"`
}
var Presenter = render.NewPresenter(ArticleV2ToV1)
func init() {
Presenter.CopyFrom(v2.Presenter)
}
func ArticleV2ToV1(r *http.Request, from *v2.Article) (*Article, error) {
to := &Article{
Article: from,
Data: map[string]bool{},
}
to.SelfURL = fmt.Sprintf("http://localhost:3333/v1?id=%v", from.ID)
to.APIVersion = "v1"
for _, item := range from.Data {
to.Data[item] = true
}