Add detailed-list style for RSS

internal/feed/rss.go

@@ -3,8 +3,11 @@ package feed
 import (
 	"context"
 	"fmt"
+	"html"
 	"log/slog"
+	"regexp"
 	"sort"
+	"strings"
 	"time"
 
 	"github.com/mmcdole/gofeed"
@@ -16,12 +19,34 @@ type RSSFeedItem struct {
 	Title       string
 	Link        string
 	ImageURL    string
+	Categories  []string
+	Description string
 	PublishedAt time.Time
 }
 
+// doesn't cover all cases but works the vast majority of the time
+var htmlTagsWithAttributesPattern = regexp.MustCompile(`<\/?[a-zA-Z0-9-]+ *(?:[a-zA-Z-]+=(?:"|').*?(?:"|') ?)* *\/?>`)
+var sequentialWhitespacePattern = regexp.MustCompile(`\s+`)
+
+func sanitizeFeedDescription(description string) string {
+	if description == "" {
+		return ""
+	}
+
+	description = strings.ReplaceAll(description, "\n", " ")
+	description = htmlTagsWithAttributesPattern.ReplaceAllString(description, "")
+	description = sequentialWhitespacePattern.ReplaceAllString(description, " ")
+	description = strings.TrimSpace(description)
+	description = html.UnescapeString(description)
+
+	return description
+}
+
 type RSSFeedRequest struct {
-	Url   string `yaml:"url"`
-	Title string `yaml:"title"`
+	Url             string `yaml:"url"`
+	Title           string `yaml:"title"`
+	HideCategories  bool   `yaml:"hide-categories"`
+	HideDescription bool   `yaml:"hide-description"`
 }
 
 type RSSFeedItems []RSSFeedItem
@@ -57,6 +82,36 @@ func getItemsFromRSSFeedTask(request RSSFeedRequest) ([]RSSFeedItem, error) {
 			Link:       item.Link,
 		}
 
+		if !request.HideDescription && item.Description != "" {
+			description, _ := limitStringLength(item.Description, 1000)
+			description = sanitizeFeedDescription(description)
+			description, limited := limitStringLength(description, 200)
+
+			if limited {
+				description += "…"
+			}
+
+			rssItem.Description = description
+		}
+
+		if !request.HideCategories {
+			var categories = make([]string, 0, 6)
+
+			for _, category := range item.Categories {
+				if len(categories) == 6 {
+					break
+				}
+
+				if len(category) == 0 || len(category) > 30 {
+					continue
+				}
+
+				categories = append(categories, category)
+			}
+
+			rssItem.Categories = categories
+		}
+
 		if request.Title != "" {
 			rssItem.ChannelName = request.Title
 		} else {

internal/feed/utils.go

@@ -77,3 +77,13 @@ func maybeCopySliceWithoutZeroValues[T int | float64](values []T) []T {
 
 	return values
 }
+
+func limitStringLength(s string, max int) (string, bool) {
+	asRunes := []rune(s)
+
+	if len(asRunes) > max {
+		return string(asRunes[:max]), true
+	}
+
+	return s, false
+}