user: Add HTML templates for user menu

src/invidious/frontend/user_menu.cr

@@ -0,0 +1,112 @@
+module Invidious::Frontend::UserMenu
+  extend self
+
+  # -------------------
+  #  Menu items
+  # -------------------
+
+  enum UserContentMenu
+    Subscriptions
+    WatchHistory
+    Playlists
+  end
+
+  enum UserAccountMenu
+    Preferences
+    Account
+    ImportExport
+    LogOut
+  end
+
+  private alias UserMenuItem = UserContentMenu | UserAccountMenu
+
+  # -------------------
+  #  HTML templates
+  # -------------------
+
+  # Generates the following menu:
+  #
+  # ```
+  # <div class="user-menu"><ul>
+  #   <li class="user-menu-tab"><a href="#">Subscriptions</a></li>
+  #   <li class="user-menu-tab"><a href="#">Watch history</a></li>
+  #   <li class="user-menu-tab"><a href="#">Playlists</a></li>
+  # </ul></div>
+  #
+  # <div class="user-menu"><ul>
+  #   <li class="user-menu-tab"><p>Preferences</p></li>
+  #   <li class="user-menu-tab"><a href="#">Account</a></li>
+  #   <li class="user-menu-tab"><a href="#">Import &amp; Export</a></li>
+  #   <li class="user-menu-tab"><p>Log Out</p></li>
+  # </ul></div>
+  # ```
+  #
+  # The selected entry will have the "selected" class.
+  #
+  def make_menu(env : HTTP::Server::Context, selected_item : UserMenuItem) : String
+    # A capacity of 1500 is enough to store the HTML (empty)
+    # plus the URLs with parameters and the translated text.
+    str_builder = String::Builder.new(1500)
+
+    # TODO: Get variables from HTTP env
+    locale = env.get("preferences").as(Preferences).locale
+    params = nil
+
+    # Start of menu #1
+    str_builder << <<-HTML
+    <div class="user-menu"><ul>
+    HTML
+
+    # Menu items for the 1st menu
+    UserContentMenu.each do |menu_item|
+      case menu_item
+      when .subscriptions? then url = "/subscription_manager"
+      when .watch_history? then url = "/feed/history"
+      when .playlists?     then url = "/user/subscription_manager"
+      end
+
+      url += "?" + params if params
+
+      text = HTML.escape(translate(locale, "user_menu_item_" + menu_item.to_s.underscore))
+
+      if menu_item == selected_item
+        str_builder << "\t<li class=\"user-menu-tab selected\"><p>#{text}</p></li>\n"
+      else
+        str_builder << "\t<li class=\"user-menu-tab\"><a href=\"#{url}\">#{text}</a></li>\n"
+      end
+    end
+
+    # End of menu #1, start of menu #2
+    str_builder << <<-HTML
+    </ul></div>
+    <div class="user-menu"><ul>
+    HTML
+
+    # Menu items for the 2nd menu
+    UserAccountMenu.each do |menu_item|
+      case menu_item
+      when .preferences?   then url = "/preferences"
+      when .account?       then url = "/" # TODO
+      when .import_export? then url = "/data_control"
+      when .log_out?       then url = "/log_out"
+      end
+
+      url += "?" + params if params
+
+      text = HTML.escape(translate(locale, "user_menu_item_" + menu_item.to_s.underscore))
+
+      if menu_item == selected_item
+        str_builder << "\t<li class=\"user-menu-tab selected\"><p>#{text}</p></li>\n"
+      else
+        str_builder << "\t<li class=\"user-menu-tab\"><a href=\"#{url}\">#{text}</a></li>\n"
+      end
+    end
+
+    # End of menu #2
+    str_builder << <<-HTML
+    </ul></div>
+    HTML
+
+    return str_builder.to_s
+  end
+end