FIX: skip invalid URLs when checking for audio/video in search blurbs

Fixes 500 errors on search queries introduced in 580a4a8

lib/search/grouped_search_results.rb

@@ -78,14 +78,16 @@ class Search
 
       urls = Set.new
       cooked.scan(URI.regexp(%w{http https})) { urls << $& }
-
       urls.each do |url|
+        begin
           case File.extname(URI(url).path || "")
           when Oneboxer::VIDEO_REGEX
             cooked.gsub!(url, I18n.t("search.video"))
           when Oneboxer::AUDIO_REGEX
             cooked.gsub!(url, I18n.t("search.audio"))
           end
+        rescue URI::InvalidURIError
+        end
       end
 
       if term

spec/lib/search_spec.rb

@@ -28,7 +28,7 @@ describe Search do
       expect(result).to eq("link to an external page: https://google.com/?u=bar link to an audio file: #{I18n.t("search.audio")} link to a video file: #{I18n.t("search.video")}")
     end
 
-    it "strips URLs correctly when blurb is" do
+    it "strips URLs correctly when blurb is longer than limit" do
       cooked = <<~RAW
         Here goes a test cooked with enough characters to hit the blurb limit.
 
@@ -41,6 +41,13 @@ describe Search do
       expect(result).to eq("Here goes a test cooked with enough characters to hit the blurb limit. Something is very interesting about this audio file. #{I18n.t("search.audio")}")
     end
 
+    it "does not fail on bad URLs" do
+      cooked = <<~RAW
+        invalid URL: http:error] should not trip up blurb generation.
+      RAW
+      result = Search::GroupedSearchResults.blurb_for(cooked)
+      expect(result).to eq("invalid URL: http:error] should not trip up blurb generation.")
+    end
   end
 
 end