Add rubygem download ranking

app/assets/stylesheets/layout.css

@@ -20,6 +20,9 @@
 .l-mb-4 {
   margin-bottom: 1rem; }
 
+.l-mb-6 {
+  margin-bottom: 1.5rem; }
+
 .l-mb-8 {
   margin-bottom: 2rem; }
 

app/assets/stylesheets/modules/gem.css

@@ -76,7 +76,6 @@
   margin-bottom: 6px; }
 
 .gem__downloads {
-  margin-bottom: 20px;
   display: block;
   font-weight: 800;
   font-size: 24px; }

app/assets/stylesheets/type.css

@@ -33,8 +33,7 @@
 
 .t-text--s {
   font-weight: 500;
-  font-size: 12px;
-  text-transform: uppercase; }
+  font-size: 12px; }
 
 .t-hidden {
   position: absolute !important;

app/models/rubygem.rb

@@ -183,6 +183,15 @@ def downloads
     gem_download&.count || 0
   end
 
+  def gem_rank
+    gem_ranking = update_gems_ranking
+
+    return gem_ranking[id] if gem_ranking.key?(id)
+
+    Rails.cache.delete("gems_ranking")
+    update_gems_ranking[id]
+  end
+
   def most_recent_version
     versions.most_recent
   end
@@ -446,4 +455,17 @@ def bulk_reorder_versions
     sanitized_query = ActiveRecord::Base.send(:sanitize_sql_array, update_query)
     ActiveRecord::Base.connection.execute(sanitized_query)
   end
+
+  def update_gems_ranking
+    Rails.cache.fetch("gems_ranking", expires_in: 24.hours) do
+      update_query = <<-SQL.squish
+        SELECT rubygem_id, row_number() OVER(ORDER BY count DESC) AS position
+        FROM gem_downloads
+        WHERE version_id = 0 AND rubygem_id <> 0
+      SQL
+      sanitized_query = ActiveRecord::Base.send(:sanitize_sql_array, [update_query])
+      pg_result = ActiveRecord::Base.connection.execute(sanitized_query)
+      pg_result.to_h { |row| [row["rubygem_id"], row["position"]] }
+    end
+  end
 end

app/views/profiles/show.html.erb

@@ -98,19 +98,19 @@
     </div>
 
     <div class="profile__downloads-wrap">
-      <h4 class="gem__downloads__heading t-text--s">
+      <h4 class="gem__downloads__heading t-text--s t-uppercase">
         <%= t('stats.index.total_gems') %>
       </h4>
 
-      <h2 id="profile-gems-count" class="gem__downloads">
+      <h2 id="profile-gems-count" class="gem__downloads l-mb-6">
         <%= @user.total_rubygems_count.to_s %>
       </h2>
 
-      <h4 id="downloads" class="gem__downloads__heading t-text--s">
+      <h4 id="downloads" class="gem__downloads__heading t-text--s t-uppercase">
         <%= t('stats.index.total_downloads') %>
       </h4>
 
-      <h2 id="downloads_count" class="gem__downloads">
+      <h2 id="downloads_count" class="gem__downloads l-mb-6">
         <%= number_with_delimiter(@user.total_downloads_count) %>
       </h2>
     </div>

app/views/rubygems/_aside.html.erb

@@ -10,10 +10,11 @@
 
   <div class="gem__downloads-wrap" data-href="<%= api_v1_download_path(@latest_version.full_name, :format => 'json') %>">
     <h2 class="gem__downloads__heading t-text--s">
-      <%= t('stats.index.total_downloads') %>
+      <span class="t-uppercase"><%= t('stats.index.total_downloads') %></span>
       <span class="gem__downloads"><%= number_with_delimiter(@rubygem.downloads) %></span>
+      <span class="gem__downloads t-text--s l-mb-6"><%= t('stats.index.ranking', count: number_with_delimiter(@rubygem.gem_rank), total: number_with_delimiter(Rubygem.total_count)) %></span>
     </h2>
-    <h2 class="gem__downloads__heading t-text--s">
+    <h2 class="gem__downloads__heading t-text--s t-uppercase">
       <%= t('.downloads_for_this_version') %>
       <span class="gem__downloads"><%= number_with_delimiter(@latest_version.downloads_count) %></span>
     </h2>

config/locales/de.yml

@@ -606,6 +606,7 @@ de:
       total_downloads: Downloads insgesamt
       total_gems: Gems insgesamt
       total_users: Benutzer insgesamt
+      ranking: "%{count} von %{total}"
   users:
     create:
       email_sent:

config/locales/en.yml

@@ -605,6 +605,7 @@ en:
       total_downloads: Total downloads
       total_gems: Total gems
       total_users: Total users
+      ranking: "%{count} of %{total}"
   users:
     create:
       email_sent: A confirmation mail has been sent to your email address.

config/locales/es.yml

@@ -650,6 +650,7 @@ es:
       total_downloads: Total de descargas
       total_gems: Gemas totales
       total_users: Usuarios totales
+      ranking: "%{count} de %{total}"
   users:
     create:
       email_sent: Se ha enviado un correo de confirmación a tu casilla de correo electrónico.

config/locales/fr.yml

@@ -657,6 +657,7 @@ fr:
       total_downloads: Total de téléchargements
       total_gems: Total de gems
       total_users: Total d'utilisateurs
+      ranking: "%{count} de %{total}"
   users:
     create:
       email_sent: Un email de confirmation a été envoyé sur votre adresse email.

config/locales/ja.yml

@@ -595,6 +595,7 @@ ja:
       total_downloads: 累計ダウンロード数
       total_gems: Gem総数
       total_users: ユーザー総数
+      ranking:
   users:
     create:
       email_sent: 確認メールがあなたのメールアドレスに送信されました。

config/locales/nl.yml

@@ -610,6 +610,7 @@ nl:
       total_downloads:
       total_gems:
       total_users:
+      ranking:
   users:
     create:
       email_sent: Een bevestigingsemail is naar je e-mailadres gestuurd

config/locales/pt-BR.yml

@@ -633,6 +633,7 @@ pt-BR:
       total_downloads: Total de downloads
       total_gems: Total de gems
       total_users: Total de usuários
+      ranking: "%{count} de %{total}"
   users:
     create:
       email_sent:

config/locales/zh-CN.yml

@@ -592,6 +592,7 @@ zh-CN:
       total_downloads: 下载总次数
       total_gems: Gems 总数
       total_users: 用户总数
+      ranking:
   users:
     create:
       email_sent: 确认邮件已发送到您的电子邮件地址。

config/locales/zh-TW.yml

@@ -593,6 +593,7 @@ zh-TW:
       total_downloads: 總下載次數
       total_gems: Gems 總數
       total_users: 總使用者數量
+      ranking:
   users:
     create:
       email_sent: 已發送確認信到你的信箱地址。

test/models/rubygem_test.rb

@@ -1102,4 +1102,41 @@ class RubygemTest < ActiveSupport::TestCase
       refute_predicate @version_three, :yanked?
     end
   end
+
+  context "#gem_rank" do
+    setup do
+      @rank_one = create(:rubygem, downloads: 5)
+      @rank_two = create(:rubygem, downloads: 1)
+
+      @dummy_rank = { @rank_one.id => 1, @rank_two.id => 2 }
+    end
+
+    should "write to cache" do
+      @rank_one.gem_rank
+
+      assert_equal Rails.cache.read("gems_ranking"), @dummy_rank
+    end
+
+    should "read from cache" do
+      @rank_two.gem_rank
+
+      GemDownload.increment(10, rubygem_id: @rank_two.id)
+
+      @rank_two.gem_rank
+
+      assert_equal Rails.cache.read("gems_ranking"), @dummy_rank
+    end
+
+    should "return the gem rank" do
+      assert_equal 1, @rank_one.gem_rank
+    end
+
+    should "update when rubygem not ranked" do
+      @rank_two.gem_rank
+
+      @rank_three = create(:rubygem, downloads: 3)
+
+      assert_equal(2, @rank_three.gem_rank)
+    end
+  end
 end