add preferences and customization (#171)

app/controllers/landing_controller.rb

@@ -55,6 +55,19 @@ class LandingController < ApplicationController
   end
   helper_method :admin?
 
+  def preferences
+    @user = current_user
+  end
+
+  def landing_background
+    if !current_user || !current_user.background? then
+      (ENV['LANDING_BACKGROUND'].present?) ? ENV['LANDING_BACKGROUND'] : 'greenlight_background.png'
+    else
+      current_user.background.url
+    end
+  end
+  helper_method :landing_background
+
   private
 
   def render_meeting

app/controllers/users_controller.rb

@@ -0,0 +1,41 @@
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2016 BigBlueButton Inc. and by respective authors (see below).
+#
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+class UsersController < ActionController::Base
+
+  # For updating a users background image.
+  def update
+
+    # Make sure they actually select a file.
+    if params[:user] then
+      @user = User.find(params[:id])
+      @user.assign_attributes(background: user_params[:background])
+      flash[:danger] = t('invalid_file') unless @user.save
+    else
+      flash[:danger] = t('no_file')
+    end
+
+    # Reload the page to apply changes and show flash messages.
+    redirect_back(fallback_location: root_path)
+  end
+
+  private
+
+  def user_params
+    params.require(:user).permit(:background)
+  end
+
+end