added opml export

source/opml.xml.builder

@@ -0,0 +1,30 @@
+xml.instruct!
+xml.opml version: '1.1' do
+
+  modified_time = IO.popen(["git", "log", "--pretty=format:%ai", "#{root}/data/feeds.yml"]).read.split(/\n/).first.to_date rescue Time.now
+
+  xml.head do
+    xml.title data.site.name
+    xml.dateModified modified_time.to_s( :rfc822 ).strip
+    xml.ownerName { xml.name data.site.owner || data.site.name }.strip
+  end
+
+  feed_map = {}
+  title_map = {}
+
+  planet_feeds.each do |info|
+    next if feed_map[info[:feed_source]]
+    feed_map[info[:feed_source]] = info[:feed_url]
+    title_map[info[:feed_source]] = info[:feed_title]
+  end
+
+  xml.body do
+    data.feeds.each do |name, info|
+      xml.outline text: name.strip,
+        type: 'rss',
+        title: title_map[info[:feed].strip],
+        htmlUrl: feed_map[info[:feed].strip],
+        xmlUrl: info[:feed].strip
+    end
+  end
+end