make byots a plugin setting

refs CNVS-18526

test plan
 - remove ticketing system mL
 - it should use the plugin settings

Change-Id: Iaed00f254f3de500e518c38b57cf666898103836
Reviewed-on: https://gerrit.instructure.com/50566
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins
Product-Review: Rob Orton <rob@instructure.com>
QA-Review: Rob Orton <rob@instructure.com>

Author: roor0

app/views/plugins/_ticketing_system_settings.html.erb

@@ -0,0 +1,13 @@
+<%= fields_for :settings, OpenObject.new(settings) do |f| %>
+  <table style="width: 500px;" class="formtable">
+    <tr>
+      <td colspan="2">
+        <%= mt :description, "Ticketing System setup" %>
+      </td>
+    </tr>
+    <tr>
+      <td><%= f.blabel :type, :en => "Ticketing System type" %></td>
+      <td><%= f.select :type, Canvas::Plugin.all_for_tag(:byots).map { |p| [p.name, p.id] } %>
+    </tr>
+  </table>
+<% end %>

lib/canvas/plugins/default_plugins.rb

@@ -318,3 +318,12 @@
   :settings_partial => 'plugins/panda_pub_settings',
   :validator => 'PandaPubValidator'
 })
+Canvas::Plugin.register('byots', nil, {
+  :name => lambda{ t :name, 'Ticketing System' },
+  :description => lambda{ t :description, 'Ticketing system configurations' },
+  :author => 'Instructure',
+  :author_website => 'http://www.instructure.com',
+  :version => '1.0.0',
+  :settings_partial => 'plugins/ticketing_system_settings',
+  :validator => 'TicketingSystemValidator'
+})

lib/canvas/plugins/validators/ticketing_systerm_validator.rb

@@ -0,0 +1,27 @@
+#
+# Copyright (C) 2015 Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, version 3 of the License.
+#
+# Canvas 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 Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+module Canvas::Plugins::Validators::TicketingSystemValidator
+  def self.validate(settings, plugin_setting)
+    if Canvas::Plugin.find(settings[:type])
+      settings.slice(:type)
+    else
+      raise("could not find plugin for #{settings[:type]}")
+    end
+  end
+end