First commit

reader/opml/opml.go

@@ -0,0 +1,82 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package opml
+
+import "encoding/xml"
+
+type Opml struct {
+	XMLName  xml.Name  `xml:"opml"`
+	Version  string    `xml:"version,attr"`
+	Outlines []Outline `xml:"body>outline"`
+}
+
+type Outline struct {
+	Title    string    `xml:"title,attr,omitempty"`
+	Text     string    `xml:"text,attr"`
+	FeedURL  string    `xml:"xmlUrl,attr,omitempty"`
+	SiteURL  string    `xml:"htmlUrl,attr,omitempty"`
+	Outlines []Outline `xml:"outline,omitempty"`
+}
+
+func (o *Outline) GetTitle() string {
+	if o.Title != "" {
+		return o.Title
+	}
+
+	if o.Text != "" {
+		return o.Text
+	}
+
+	if o.SiteURL != "" {
+		return o.SiteURL
+	}
+
+	if o.FeedURL != "" {
+		return o.FeedURL
+	}
+
+	return ""
+}
+
+func (o *Outline) GetSiteURL() string {
+	if o.SiteURL != "" {
+		return o.SiteURL
+	}
+
+	return o.FeedURL
+}
+
+func (o *Outline) IsCategory() bool {
+	return o.Text != "" && o.SiteURL == "" && o.FeedURL == ""
+}
+
+func (o *Outline) Append(subscriptions SubcriptionList, category string) SubcriptionList {
+	if o.FeedURL != "" {
+		subscriptions = append(subscriptions, &Subcription{
+			Title:        o.GetTitle(),
+			FeedURL:      o.FeedURL,
+			SiteURL:      o.GetSiteURL(),
+			CategoryName: category,
+		})
+	}
+
+	return subscriptions
+}
+
+func (o *Opml) Transform() SubcriptionList {
+	var subscriptions SubcriptionList
+
+	for _, outline := range o.Outlines {
+		if outline.IsCategory() {
+			for _, element := range outline.Outlines {
+				subscriptions = element.Append(subscriptions, outline.Text)
+			}
+		} else {
+			subscriptions = outline.Append(subscriptions, "")
+		}
+	}
+
+	return subscriptions
+}