refact

lib/service/games_service.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class GamesService
+  def initialize(repo) = @repo = repo
+
+  def all = @repo.fetch
+end

lib/service/message_service.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class MessageService
+  def initialize(repo) = @repo = repo
+
+  def recent(count = 30) = @repo.last(count)
+  def count              = @repo.count
+
+  def post(username, text)
+    return :empty if text.strip.empty?
+    @repo.append(username, text.strip[0...200])
+    :ok
+  end
+end

lib/service/online_service.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class OnlineService
+  def initialize(repo) = @repo = repo
+
+  def add(session_id, username) = @repo.add(session_id, username)
+  def remove(session_id)        = @repo.remove(session_id)
+  def count                     = @repo.count
+  def user_list                 = @repo.snapshot.sort.map { |_, name| name }
+end

lib/service/wiki_service.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class WikiService
+  def initialize(repo) = @repo = repo
+
+  def list(category)         = @repo.list(category)
+  def content(page_id)       = @repo.content(page_id)
+  def page_url(locale, path) = @repo.page_url(locale, path)
+end