GRN2-6: Added the ability for admins to specify registration method (#520)

* Added the ability to invite users

* Small bug fix

* Added the ability to approve/decline users

* Small bug fixes

* More bug fixes

* More minor changes

* Final changes

app/models/invitation.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2018 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 Invitation < ApplicationRecord
+  has_secure_token :invite_token
+
+  scope :valid, -> { where(updated_at: (Time.now - 48.hours)..Time.now) }
+end

app/models/setting.rb

@@ -37,6 +37,8 @@ class Setting < ApplicationRecord
         Rails.configuration.branding_image_default
       when "Primary Color"
         Rails.configuration.primary_color_default
+      when "Registration Method"
+        Rails.configuration.registration_method_default
       end
     end
   end