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// RSS rendering for the recommendations feed: hand-rolled RSS 2.0 via
// encoding/xml, no feed library. The render source is the runs.jsonl tail;
// items appear newest batch first, kept order within a batch. Guid embeds
// the original Miniflux entry ID (mf:<id>) for traceability.
package cmds
import (
"encoding/xml"
"fmt"
"time"
"fluxrec/core"
)
const rssXMLHeader = `<?xml version="1.0" encoding="UTF-8"?>` + "\n"
type rssGUID struct {
IsPermaLink bool `xml:"isPermaLink,attr"`
Value string `xml:",chardata"`
}
type rssItem struct {
Title string `xml:"title"`
Link string `xml:"link"`
GUID rssGUID `xml:"guid"`
PubDate string `xml:"pubDate"`
Description string `xml:"description"`
}
type rssChannel struct {
Title string `xml:"title"`
Description string `xml:"description"`
Items []rssItem `xml:"item"`
}
type rssDocument struct {
XMLName xml.Name `xml:"rss"`
Version string `xml:"version,attr"`
Channel rssChannel `xml:"channel"`
}
// RenderRSS renders runs (oldest to newest, as read from runs.jsonl) as an
// RSS 2.0 document. The source feed title prefixes each item description so
// provenance is visible in-reader; item content was already cleaned when
// the run row was written.
func RenderRSS(runs []core.RunRow) ([]byte, error) {
doc := rssDocument{
Version: "2.0",
Channel: rssChannel{
Title: "fluxrec recommendations",
Description: "Top-scored Miniflux entries, refreshed on a schedule.",
},
}
for i := len(runs) - 1; i >= 0; i-- {
for _, k := range runs[i].Kept {
doc.Channel.Items = append(doc.Channel.Items, rssItem{
Title: k.Title,
Link: k.URL,
GUID: rssGUID{IsPermaLink: false, Value: fmt.Sprintf("mf:%d", k.EntryID)},
PubDate: k.PublishedAt.Format(time.RFC1123Z),
Description: rssDescription(k),
})
}
}
body, err := xml.MarshalIndent(doc, "", " ")
if err != nil {
return nil, fmt.Errorf("marshaling RSS: %w", err)
}
return append([]byte(rssXMLHeader), body...), nil
}
// rssDescription builds the item body: source feed name on the first line,
// then the cleaned content (if any).
func rssDescription(k core.KeptItem) string {
if k.Content == "" {
return k.FeedTitle
}
if k.FeedTitle == "" {
return k.Content
}
return k.FeedTitle + "\n\n" + k.Content
}
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