Add support for RSS <media:category> element

internal/reader/media/media.go

@@ -13,11 +13,12 @@ var textLinkRegex = regexp.MustCompile(`(?mi)(\bhttps?:\/\/[-A-Z0-9+&@#\/%?=~_|!
 
 // Specs: https://www.rssboard.org/media-rss
 type MediaItemElement struct {
-	MediaGroups       []Group         `xml:"http://search.yahoo.com/mrss/ group"`
-	MediaContents     []Content       `xml:"http://search.yahoo.com/mrss/ content"`
-	MediaThumbnails   []Thumbnail     `xml:"http://search.yahoo.com/mrss/ thumbnail"`
-	MediaDescriptions DescriptionList `xml:"http://search.yahoo.com/mrss/ description"`
-	MediaPeerLinks    []PeerLink      `xml:"http://search.yahoo.com/mrss/ peerLink"`
+	MediaCategories   MediaCategoryList `xml:"http://search.yahoo.com/mrss/ category"`
+	MediaGroups       []Group           `xml:"http://search.yahoo.com/mrss/ group"`
+	MediaContents     []Content         `xml:"http://search.yahoo.com/mrss/ content"`
+	MediaThumbnails   []Thumbnail       `xml:"http://search.yahoo.com/mrss/ thumbnail"`
+	MediaDescriptions DescriptionList   `xml:"http://search.yahoo.com/mrss/ description"`
+	MediaPeerLinks    []PeerLink        `xml:"http://search.yahoo.com/mrss/ peerLink"`
 }
 
 // AllMediaThumbnails returns all thumbnail elements merged together.
@@ -173,3 +174,20 @@ func (dl DescriptionList) First() string {
 	}
 	return ""
 }
+
+type MediaCategoryList []MediaCategory
+
+func (mcl MediaCategoryList) Labels() []string {
+	var labels []string
+	for _, category := range mcl {
+		label := strings.TrimSpace(category.Label)
+		if label != "" {
+			labels = append(labels, label)
+		}
+	}
+	return labels
+}
+
+type MediaCategory struct {
+	Label string `xml:"label,attr"`
+}

internal/reader/rss/adapter.go

@@ -122,6 +122,7 @@ func (r *RSSAdapter) BuildFeed(feedURL string) *model.Feed {
 
 		// Populate entry categories.
 		entry.Tags = append(entry.Tags, item.Categories...)
+		entry.Tags = append(entry.Tags, item.MediaCategories.Labels()...)
 		entry.Tags = append(entry.Tags, r.rss.Channel.Categories...)
 		entry.Tags = append(entry.Tags, r.rss.Channel.GetItunesCategories()...)
 

internal/reader/rss/parser_test.go

@@ -1681,6 +1681,42 @@ func TestParseFeedWithGooglePlayCategory(t *testing.T) {
 	}
 }
 
+func TestParseEntryWithMediaCategories(t *testing.T) {
+	data := `<?xml version="1.0" encoding="utf-8"?>
+		<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/" version="2.0">
+		<channel>
+			<title>Example</title>
+			<link>https://example.org/</link>
+			<item>
+				<title>Test</title>
+				<link>https://example.org/item</link>
+				<media:category label="Visual Art">visual_art</media:category>
+				<media:category scheme="http://search.yahoo.com/mrss/category_ schema">music/artist/album/song</media:category>
+				<media:category scheme="urn:flickr:tags">ycantpark mobile</media:category>
+				<media:category scheme="http://dmoz.org" label="Ace Ventura - Pet Detective">Arts/Movies/Titles/A/Ace_Ventura_Series/Ace_Ventura_ -_Pet_Detective</media:category>
+			</item>
+		</channel>
+		</rss>`
+
+	feed, err := Parse("https://example.org/", bytes.NewReader([]byte(data)))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(feed.Entries[0].Tags) != 2 {
+		t.Errorf("Incorrect number of tags, got: %d", len(feed.Entries[0].Tags))
+	}
+
+	expected := []string{"Visual Art", "Ace Ventura - Pet Detective"}
+	result := feed.Entries[0].Tags
+
+	for i, tag := range result {
+		if tag != expected[i] {
+			t.Errorf("Incorrect tag, got: %q", tag)
+		}
+	}
+}
+
 func TestParseFeedWithTTLField(t *testing.T) {
 	data := `<?xml version="1.0" encoding="utf-8"?>
 		<rss version="2.0">