From 4f01edb9230f58ff84b0dd892c931ec8ac9aad55 Mon Sep 17 00:00:00 2001
From: Brian Picciano <mediocregopher@gmail.com>
Date: Tue, 13 Sep 2022 12:56:08 +0200
Subject: move src out of srv, clean up default.nix and Makefile

---
 src/http/feed.go | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/http/feed.go

(limited to 'src/http/feed.go')

diff --git a/src/http/feed.go b/src/http/feed.go
new file mode 100644
index 0000000..8bb01c4
--- /dev/null
+++ b/src/http/feed.go
@@ -0,0 +1,77 @@
+package http
+
+import (
+	"fmt"
+	"net/http"
+	"path/filepath"
+
+	"github.com/gorilla/feeds"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/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:       "Mediocre Blog",
+			Link:        &feeds.Link{Href: publicURL + "/"},
+			Description: "A mix of tech, art, travel, and who knows what else.",
+			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 := publicURL + filepath.Join("/posts", post.ID)
+
+			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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