Use enclosure_url when url is missing

Some feeds, especially the podcasts, don't have an URL for their
stories. That's fine, the url is not mandatory but we decided to link to
the media object when it is present and the url is not.

app/repositories/story_repository.rb

@@ -6,11 +6,9 @@ class StoryRepository
   extend UrlHelpers
 
   def self.add(entry, feed)
-    entry.url = normalize_url(entry.url, feed.url) unless entry.url.nil?
-
     Story.create(feed: feed,
                  title: extract_title(entry),
-                 permalink: entry.url,
+                 permalink: extract_url(entry, feed),
                  body: extract_content(entry),
                  is_read: false,
                  is_starred: false,
@@ -83,6 +81,12 @@ def self.read_count
     Story.where(is_read: true).count
   end
 
+  def self.extract_url(entry, feed)
+    return entry.enclosure_url if entry.url.nil? && entry.enclosure_url.present?
+
+    normalize_url(entry.url, feed.url) unless entry.url.nil?
+  end
+
   def self.extract_content(entry)
     sanitized_content = ""
 

spec/repositories/story_repository_spec.rb

@@ -26,6 +26,22 @@
     end
   end
 
+  describe ".extract_url" do
+    it "returns the url" do
+      feed = double(url: "http://github.com")
+      entry = double(url: "https://github.com/swanson/stringer")
+
+      expect(StoryRepository.extract_url(entry, feed)).to eq "https://github.com/swanson/stringer"
+    end
+
+    it "returns the enclosure_url when the url is nil" do
+      feed = double(url: "http://github.com")
+      entry = double(url: nil, enclosure_url: "https://github.com/swanson/stringer")
+
+      expect(StoryRepository.extract_url(entry, feed)).to eq "https://github.com/swanson/stringer"
+    end
+  end
+
   describe ".extract_title" do
     let(:entry) do
     end