Add RSS feeds (#194)

Closes #179

Reviewed-on: https://codeberg.org/rimgo/rimgo/pulls/194
Reviewed-by: orangix <orangix@noreply.codeberg.org>
Co-authored-by: video-prize-ranch <cb.8a3w5@simplelogin.co>
Co-committed-by: video-prize-ranch <cb.8a3w5@simplelogin.co>

pages/rss.go

@@ -0,0 +1,136 @@
+package pages
+
+import (
+	"time"
+
+	"codeberg.org/rimgo/rimgo/api"
+	"codeberg.org/rimgo/rimgo/utils"
+	"github.com/gofiber/fiber/v2"
+	"github.com/gorilla/feeds"
+)
+
+func HandleTagRSS(c *fiber.Ctx) error {
+	utils.SetHeaders(c)
+
+	tag, err := ApiClient.FetchTag(c.Params("tag"), c.Query("sort"), "1")
+	if err != nil && err.Error() == "ratelimited by imgur" {
+		return c.Status(429).SendString("rate limited by imgur")
+	}
+	if err != nil {
+		return err
+	}
+	if tag.Display == "" {
+		return c.Status(404).SendString("tag not found")
+	}
+
+	instance := utils.GetInstanceUrl(c)
+
+	feed := &feeds.Feed{
+		Title:   tag.Display + " on Imgur",
+		Link:    &feeds.Link{Href: instance + "/t/" + c.Params("tag")},
+		Created: time.Now(),
+	}
+
+	return handleFeed(c, instance, feed, tag.Posts)
+}
+
+func HandleTrendingRSS(c *fiber.Ctx) error {
+	utils.SetHeaders(c)
+
+	section := c.Query("section")
+	switch section {
+	case "hot", "new", "top":
+	default:
+		section = "hot"
+	}
+	sort := c.Query("sort")
+	switch sort {
+	case "newest", "best", "popular":
+	default:
+		sort = "popular"
+	}
+
+	results, err := ApiClient.FetchTrending(section, sort, "1")
+	if err != nil {
+		return err
+	}
+
+	instance := utils.GetInstanceUrl(c)
+
+	feed := &feeds.Feed{
+		Title:   "Trending on Imgur",
+		Link:    &feeds.Link{Href: instance + "/trending"},
+		Created: time.Now(),
+	}
+
+	return handleFeed(c, instance, feed, results)
+}
+
+func HandleUserRSS(c *fiber.Ctx) error {
+	utils.SetHeaders(c)
+
+	user := c.Params("userID")
+
+	submissions, err := ApiClient.FetchSubmissions(user, "newest", "1")
+	if err != nil && err.Error() == "ratelimited by imgur" {
+		c.Status(429)
+		return utils.RenderError(c, 429)
+	}
+	if err != nil {
+		return err
+	}
+
+	instance := utils.GetInstanceUrl(c)
+
+	feed := &feeds.Feed{
+		Title:   user + " on Imgur",
+		Link:    &feeds.Link{Href: instance + "/user/" + user},
+		Created: time.Now(),
+	}
+
+	return handleFeed(c, instance, feed, submissions)
+}
+
+func handleFeed(c *fiber.Ctx, instance string, feed *feeds.Feed, posts []api.Submission) error {
+	feed.Items = []*feeds.Item{}
+
+	for _, post := range posts {
+		link := instance + post.Link
+
+		item := &feeds.Item{
+			Title:       post.Title,
+			Link:        &feeds.Link{Href: link},
+			Description: "<a href=\"" + link + "\"><img width=\"480\" src=\"" + instance + "/" + post.Cover.Id + ".jpeg" + "\"></a>",
+		}
+
+		if post.Cover.Type == "video" {
+			item.Description = "🎞️ Video<br><br>" + item.Description
+		}
+
+		feed.Items = append(feed.Items, item)
+	}
+
+	c.Type(c.Params("type"))
+	switch c.Params("type") {
+	case "atom":
+		body, err := feed.ToAtom()
+		if err != nil {
+			return err
+		}
+		return c.SendString(body)
+	case "json":
+		body, err := feed.ToJSON()
+		if err != nil {
+			return err
+		}
+		return c.JSON(body)
+	case "rss":
+		body, err := feed.ToRss()
+		if err != nil {
+			return err
+		}
+		return c.SendString(body)
+	default:
+		return c.Status(400).SendString("invalid type")
+	}
+}