Add W3C GeoRSS in Rss and Atom

lib/domain/atom_item.dart

@@ -2,6 +2,7 @@ import 'package:webfeed/domain/atom_category.dart';
 import 'package:webfeed/domain/atom_link.dart';
 import 'package:webfeed/domain/atom_person.dart';
 import 'package:webfeed/domain/atom_source.dart';
+import 'package:webfeed/domain/geo/geo.dart';
 import 'package:webfeed/domain/media/media.dart';
 import 'package:webfeed/util/datetime.dart';
 import 'package:webfeed/util/xml.dart';
@@ -22,6 +23,7 @@ class AtomItem {
   final String summary;
   final String rights;
   final Media media;
+  final Geo geo;
 
   AtomItem({
     this.id,
@@ -37,6 +39,7 @@ class AtomItem {
     this.summary,
     this.rights,
     this.media,
+    this.geo,
   });
 
   factory AtomItem.parse(XmlElement element) {
@@ -64,6 +67,7 @@ class AtomItem {
       summary: findFirstElement(element, 'summary')?.text,
       rights: findFirstElement(element, 'rights')?.text,
       media: Media.parse(element),
+      geo: Geo.parse(element),
     );
   }
 }

lib/domain/geo/geo.dart

@@ -0,0 +1,25 @@
+import 'package:webfeed/util/xml.dart';
+import 'package:xml/xml.dart';
+
+class Geo {
+  final double lat;
+  final double long;
+
+  Geo(this.lat, this.long);
+
+  factory Geo.parse(XmlElement element) {
+    if (element == null) {
+      return null;
+    }
+
+    var lat = double.tryParse(findFirstElement(element, 'geo:lat')?.text ?? '');
+    var long =
+        double.tryParse(findFirstElement(element, 'geo:long')?.text ?? '');
+
+    if (lat == null || long == null) {
+      return null;
+    } else {
+      return Geo(lat, long);
+    }
+  }
+}

lib/domain/rss_item.dart

@@ -1,4 +1,5 @@
 import 'package:webfeed/domain/dublin_core/dublin_core.dart';
+import 'package:webfeed/domain/geo/geo.dart';
 import 'package:webfeed/domain/itunes/itunes.dart';
 import 'package:webfeed/domain/media/media.dart';
 import 'package:webfeed/domain/rss_category.dart';
@@ -25,6 +26,7 @@ class RssItem {
   final RssEnclosure enclosure;
   final DublinCore dc;
   final Itunes itunes;
+  final Geo geo;
 
   RssItem({
     this.title,
@@ -41,6 +43,7 @@ class RssItem {
     this.enclosure,
     this.dc,
     this.itunes,
+    this.geo,
   });
 
   factory RssItem.parse(XmlElement element) {
@@ -62,6 +65,7 @@ class RssItem {
       enclosure: RssEnclosure.parse(findFirstElement(element, 'enclosure')),
       dc: DublinCore.parse(element),
       itunes: Itunes.parse(element),
+      geo: Geo.parse(element),
     );
   }
 }

test/atom_test.dart

@@ -87,6 +87,9 @@ void main() {
     expect(item.summary, 'This is summary 1');
     expect(item.content, 'This is content 1');
     expect(item.rights, 'This is rights 1');
+
+    expect(item.geo.lat, 45.3);
+    expect(item.geo.long, -0.5);
   });
   test('parse Atom-Media.xml', () {
     var xmlString = File('test/xml/Atom-Media.xml').readAsStringSync();

test/rss_test.dart

@@ -89,6 +89,9 @@ void main() {
         '<img width="1000" height="690" src="https://test.com/image_link"/> Test content<br />');
     expect(
         feed.items.first.content.images.first, 'https://test.com/image_link');
+
+    expect(feed.items.first.geo.lat, 45.3);
+    expect(feed.items.first.geo.long, -0.5);
   });
   test('parse RSS-Media.xml', () {
     var xmlString = File('test/xml/RSS-Media.xml').readAsStringSync();

test/xml/Atom.xml

@@ -72,6 +72,8 @@
         <summary type="text">This is summary 1</summary>
         <content>This is content 1</content>
         <rights>This is rights 1</rights>
+        <geo:lat>45.3</geo:lat>
+        <geo:long>-0.5</geo:long>
     </entry>
     <entry>
         <id>foo-bar-entry-id-2</id>
@@ -113,5 +115,7 @@
         <summary type="text">This is summary 2</summary>
         <content>This is content 2</content>
         <rights>This is rights 2</rights>
+        <geo:lat>43.3</geo:lat>
+        <geo:long>3.5</geo:long>
     </entry>
 </feed>

test/xml/RSS.xml

@@ -49,6 +49,8 @@
             <comments>https://foo.bar.news/1/comments</comments>
             <content:encoded><![CDATA[<img width="1000" height="690" src="https://test.com/image_link"/> Test content<br />]]></content:encoded>
             <enclosure url="http://www.scripting.com/mp3s/weatherReportSuite.mp3" length="12216320" type="audio/mpeg" />
+            <geo:lat>45.3</geo:lat>
+            <geo:long>-0.5</geo:long>
         </item>
         <item>
             <title>Section 1.10.32 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC</title>
@@ -62,6 +64,8 @@
             <author>bob@foo.bar.news</author>
             <source url="https://foo.bar.news/2?source">Lorem Ipsum</source>
             <comments>https://foo.bar.news/2/comments</comments>
+            <geo:lat>49.4</geo:lat>
+            <geo:long>9.5</geo:long>
         </item>
     </channel>
 </rss>