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package http
import (
"fmt"
"net/http"
"github.com/gorilla/feeds"
"code.betamike.com/mediocregopher/mediocre-blog/src/http/apiutil"
"code.betamike.com/mediocregopher/mediocre-blog/src/post"
)
func (a *api) renderFeedHandler() http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
tag := r.FormValue("tag")
var (
posts []post.StoredPost
err error
)
if tag == "" {
posts, _, err = a.params.PostStore.Get(0, 20)
} else {
posts, err = a.params.PostStore.GetByTag(tag)
}
if err != nil {
apiutil.InternalServerError(rw, r, fmt.Errorf("fetching recent posts: %w", err))
return
}
author := &feeds.Author{
Name: "mediocregopher",
}
publicURL := a.params.PublicURL.String()
feed := feeds.Feed{
Title: "mediocregopher's lil web corner",
Link: &feeds.Link{Href: publicURL + "/"},
Author: author,
}
for _, post := range posts {
if post.PublishedAt.After(feed.Updated) {
feed.Updated = post.PublishedAt
}
if post.LastUpdatedAt.After(feed.Updated) {
feed.Updated = post.LastUpdatedAt
}
postURL := a.postURL(post.ID, true)
item := &feeds.Item{
Title: post.Title,
Link: &feeds.Link{Href: postURL},
Author: author,
Description: post.Description,
Id: postURL,
Created: post.PublishedAt,
}
feed.Items = append(feed.Items, item)
}
if err := feed.WriteAtom(rw); err != nil {
apiutil.InternalServerError(rw, r, fmt.Errorf("writing atom feed: %w", err))
return
}
})
}
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