feat: RSS feeds for {news,guide}

_views/guide.html

@@ -4,6 +4,10 @@
 
 {{define "body"}}
 <section>
+    <h2>
+        Feed RSS
+        <a href="/guide/feed"> <i class="fa-solid fa-rss"></i></a>
+    </h2>
     <h1>
         <i class="fa-solid fa-person-chalkboard"></i>
         Articoli

_views/news.html

@@ -4,6 +4,10 @@
 
 {{define "body"}}
 <section>
+    <h2>
+        Feed RSS
+        <a href="/news/feed"> <i class="fa-solid fa-rss"></i></a>
+    </h2>
     <h1>
         <i class="far fa-newspaper"></i>
         Notizie Importanti

go.mod

@@ -17,6 +17,7 @@ require (
 require (
 	github.com/andybalholm/brotli v1.0.4 // indirect
 	github.com/dlclark/regexp2 v1.4.0 // indirect
+	github.com/gorilla/feeds v1.1.1 // indirect
 	github.com/klauspost/compress v1.15.6 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.37.0 // indirect

go.sum

@@ -19,6 +19,8 @@ github.com/gofiber/fiber/v2 v2.34.0 h1:96BJMw6uaxQhJsHY54SFGOtGgp9pgombK5Hbi4JSE
 github.com/gofiber/fiber/v2 v2.34.0/go.mod h1:ozRQfS+D7EL1+hMH+gutku0kfx1wLX4hAxDCtDzpj4U=
 github.com/gofiber/redirect/v2 v2.1.23 h1:MqRyyeKyGqkF4GIFgTB4SuqIeeXviUglgRL2HCOFofM=
 github.com/gofiber/redirect/v2 v2.1.23/go.mod h1:IYF5pPLDLYrrHMcxajDyWV+nHMbyPd6agCXkCnfLxS0=
+github.com/gorilla/feeds v1.1.1 h1:HwKXxqzcRNg9to+BbvJog4+f3s/xzvtZXICcQGutYfY=
+github.com/gorilla/feeds v1.1.1/go.mod h1:Nk0jZrvPFZX1OBe5NPiddPw7CfwF6Q9eqzaBbaightA=
 github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
 github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/klauspost/compress v1.15.0/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=

handler/handler.go

@@ -9,6 +9,7 @@ import (
 	"git.phc.dm.unipi.it/phc/website/articles"
 	"git.phc.dm.unipi.it/phc/website/auth"
 	"git.phc.dm.unipi.it/phc/website/model"
+	"git.phc.dm.unipi.it/phc/website/rss"
 	"git.phc.dm.unipi.it/phc/website/templates"
 	"git.phc.dm.unipi.it/phc/website/util"
 )
@@ -27,6 +28,8 @@ type Service interface {
 	HandleProfilePage(w io.Writer, ctx Context) error
 	HandleNewsArticlePage(w io.Writer, articleID string, ctx Context) error
 	HandleGuideArticlePage(w io.Writer, articleID string, ctx Context) error
+	HandleNewsFeedPage(w io.Writer) error
+	HandleGuideFeedPage(w io.Writer) error
 }
 
 //
@@ -188,3 +191,25 @@ func (h *DefaultHandler) HandleGuideArticlePage(w io.Writer, articleID string, c
 		"ContentHTML": template.HTML(html),
 	})
 }
+
+func (h *DefaultHandler) HandleNewsFeedPage(w io.Writer) error {
+	registry, err := h.NewsArticlesRegistry.GetArticles()
+	if err != nil {
+		return err
+	}
+
+	newsFeed := rss.GenerateRssFeed(registry)
+
+	return newsFeed.WriteRss(w)
+}
+
+func (h *DefaultHandler) HandleGuideFeedPage(w io.Writer) error {
+	registry, err := h.GuideArticlesRegistry.GetArticles()
+	if err != nil {
+		return err
+	}
+
+	guideFeed := rss.GenerateRssFeed(registry)
+
+	return guideFeed.WriteRss(w)
+}

rss/feed.go

@@ -0,0 +1,31 @@
+package rss
+
+import (
+	"git.phc.dm.unipi.it/phc/website/articles"
+	"github.com/gorilla/feeds"
+)
+
+func GenerateRssFeed(entries []*articles.Article) *feeds.Feed {
+
+	// Initialize RSS Feed
+	feed := &feeds.Feed{}
+
+	var feedItems []*feeds.Item
+
+	// Add items to RSS feeds
+	for _, entry := range entries {
+
+		feedItems = append(feedItems,
+			&feeds.Item{
+				Id:          entry.Id,
+				Title:       entry.Title,
+				Link:        &feeds.Link{Href: entry.ArticlePath},
+				Description: entry.Description,
+				Created:     entry.PublishDate,
+			})
+	}
+
+	feed.Items = feedItems
+
+	return feed
+}

server/fiber.go

@@ -105,6 +105,16 @@ func routes(h handler.Service, r fiber.Router) {
 		return h.HandleGuidePage(c, CreateContext(c))
 	})
 
+	r.Get("/news/feed", func(c *fiber.Ctx) error {
+		c.Type("xml")
+		return h.HandleNewsFeedPage(c)
+	})
+
+	r.Get("/guide/feed", func(c *fiber.Ctx) error {
+		c.Type("xml")
+		return h.HandleGuideFeedPage(c)
+	})
+
 	r.Post("/login", func(c *fiber.Ctx) error {
 		var loginForm struct {
 			Provider string `form:"provider"`