ready to pass from server to monitor but monitor still needs save to disk and reload

Former-commit-id: 1cebef822fdc157f0622b4e0fb9f93db48e0e70d

rss/serialize.go

@@ -0,0 +1,52 @@
+package rss
+
+import (
+	"io"
+	"local/rssmon3/config"
+
+	"github.com/gorilla/feeds"
+)
+
+func TaggedFeeds(tag string) ([]*Feed, error) {
+	db := config.Values().DB
+	feedNames, err := db.List([]string{nsFeeds})
+	if err != nil {
+		return nil, err
+	}
+	results := []*Feed{}
+	for _, feedName := range feedNames {
+		f := newFeed(feedName)
+		if err := f.Load(); err != nil {
+			return nil, err
+		}
+		for i := range f.Tags {
+			if f.Tags[i] == tag {
+				results = append(results, f)
+			}
+		}
+	}
+	return results, nil
+}
+
+func WriteFeed(w io.Writer, tag string, items []*Item) error {
+	feed := &feeds.Feed{
+		Title:       tag,
+		Link:        &feeds.Link{},
+		Description: tag,
+		Items:       make([]*feeds.Item, len(items)),
+	}
+	for i, item := range items {
+		feed.Items[i] = &feeds.Item{
+			Title:       item.Title,
+			Link:        &feeds.Link{Href: item.Link},
+			Description: item.Content,
+			Created:     item.TS,
+		}
+	}
+	s, err := feed.ToRss()
+	if err != nil {
+		return err
+	}
+	w.Write([]byte(s))
+	return nil
+}