AO3-6553 Bonus i18n for media on homepage

This is not strictly related to the a11y issue, but we're trying to add
i18n if we can when we touch a file.

The presence of `ts` in the original shows that we always intended to
translate media names. We don't usually translate tags, but the media
tags are a special case, because they're heavily used in site navigation

The locale preference is not transmitted at the moment, so we don't risk
caching the navigation in a non-English language for the entire site.

When we know what the parameters or settings look like, we should be
able to do something like add the locale key to the cache key, to have
one cache per locale.

app/models/media.rb

@@ -8,6 +8,10 @@ def child_types
     ['Fandom']
   end
 
+  def translation_key
+    name.parameterize(separator: "_")
+  end
+
   # The media tag for unwrangled fandoms
   def self.uncategorized
     tag = self.find_or_create_by_name(ArchiveConfig.MEDIA_UNCATEGORIZED_NAME)

app/views/home/_fandoms.html.erb

@@ -3,7 +3,7 @@
   <% cache "homepage-fandoms-version1", skip_digest: true do %>
     <% Media.for_menu.each do |medium| %>
       <% unless medium.id.nil? %>
-        <li><%= link_to ts("#{medium.name}"), medium_fandoms_path(medium) %></li>
+        <li><%= link_to t(".#{medium.translation_key}"), medium_fandoms_path(medium) %></li>
       <% end %>
     <% end %>
   <% end %>

config/locales/views/en.yml

@@ -431,6 +431,16 @@ en:
       page_title: Donate or Volunteer
     fandoms:
       all_fandoms: All Fandoms
+      anime_manga: Anime & Manga
+      books_literature: Books & Literature
+      cartoons_comics: Cartoons & Comics
+      movies: Movies
+      music_bands: Music & Bands
+      other_media: Other Media
+      real_people_celebrities: Real People & Celebrities
+      tv_shows: TV Shows
+      uncategorized_fandoms: Uncategorized Fandoms
+      video_games: Video Games
     index:
       browse_or_favorite: Browse fandoms by media or favorite up to %{count} tags to have them listed here!
       find_your_favorites: Find your favorites

spec/models/media_spec.rb

@@ -0,0 +1,10 @@
+require "spec_helper"
+
+describe Media do
+  describe "#translation_key" do
+    it "returns a parameterized version of the media name using underscore as a separator" do
+      media = create(:media, name: "Widgets; Tools & Doodads")
+      expect(media.translation_key).to eql("widgets_tools_doodads")
+    end
+  end
+end