rename packaages

src/parser/atom.go

@@ -0,0 +1,86 @@
+// Atom 1.0 parser
+package parser
+
+import (
+	"encoding/xml"
+	"html"
+	"io"
+	"strings"
+)
+
+type atomFeed struct {
+	XMLName xml.Name    `xml:"http://www.w3.org/2005/Atom feed"`
+	ID      string      `xml:"id"`
+	Title   atomText    `xml:"title"`
+	Links   atomLinks   `xml:"link"`
+	Entries []atomEntry `xml:"entry"`
+}
+
+type atomEntry struct {
+	ID        string    `xml:"id"`
+	Title     atomText  `xml:"title"`
+	Summary   atomText  `xml:"summary"`
+	Published string    `xml:"published"`
+	Updated   string    `xml:"updated"`
+	Links     atomLinks `xml:"link"`
+	Content   atomText  `xml:"content"`
+}
+
+type atomText struct {
+	Type string `xml:"type,attr"`
+	Data string `xml:",chardata"`
+	XML  string `xml:",innerxml"`
+}
+
+type atomLink struct {
+	Href string `xml:"href,attr"`
+	Rel  string `xml:"rel,attr"`
+}
+
+type atomLinks []atomLink
+
+func (a *atomText) String() string {
+	data := a.Data
+	if a.Type == "xhtml" {
+		data = a.XML
+	}
+	return html.UnescapeString(strings.TrimSpace(data))
+}
+
+func (links atomLinks) First(rel string) string {
+	for _, l := range links {
+		if l.Rel == rel {
+			return l.Href
+		}
+	}
+	return ""
+}
+
+func ParseAtom(r io.Reader) (*Feed, error) {
+	srcfeed := atomFeed{}
+
+	decoder := xmlDecoder(r)
+	if err := decoder.Decode(&srcfeed); err != nil {
+		return nil, err
+	}
+
+	dstfeed := &Feed{
+		Title:   srcfeed.Title.String(),
+		SiteURL: firstNonEmpty(srcfeed.Links.First("alternate"), srcfeed.Links.First("")),
+	}
+	for _, srcitem := range srcfeed.Entries {
+		imageUrl := ""
+		podcastUrl := ""
+
+		dstfeed.Items = append(dstfeed.Items, Item{
+			GUID:       firstNonEmpty(srcitem.ID),
+			Date:       dateParse(firstNonEmpty(srcitem.Published, srcitem.Updated)),
+			URL:        firstNonEmpty(srcitem.Links.First("alternate"), srcfeed.Links.First("")),
+			Title:      srcitem.Title.String(),
+			Content:    srcitem.Content.String(),
+			ImageURL:   imageUrl,
+			PodcastURL: podcastUrl,
+		})
+	}
+	return dstfeed, nil
+}