Add CurrentUser from OOD and toggle if user is mayaosu (#150)

Add CurrentUser from OOD and toggle if user is mayaosu. This
distingushes osu users from kent state users (who only have 2025
available).

Author: johrstrom

app/models/current_user.rb

@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+# The CurrentUser class represents the current user on the system from Etc.
+# It has a name, a home directory, gid, uid and so on.
+#
+#
+# It is a singleton for the simple reason that this is ran in a single
+# user context (i.e., the Per User Nginx).  And for convienence to do stuff
+# like User.home instead of User.new.home or OodSupport::User.new.home.
+class CurrentUser
+  include Singleton
+
+  class << self
+    delegate :name, :uid, :gid, :gecos, :dir, :shell, to: :instance
+    delegate :primary_group, :primary_group_name, :group_names, :groups, to: :instance
+
+    alias_method :home, :dir
+  end
+
+  attr_reader :pwuid
+  delegate :name, :uid, :gid, :gecos, :dir, :shell, to: :pwuid
+
+  def initialize
+    @pwuid = Etc.getpwuid
+  end
+
+  def primary_group
+    @primary_group ||= Etc.getgrgid(gid)
+  end
+
+  def primary_group_name
+    @primary_group_name ||= primary_group.name
+  end
+
+  def group_names
+    @group_names ||= groups.map(&:name)
+  end
+
+  def groups
+    @groups ||= begin
+
+      # let's guarentee that the first item in this list is the primary group
+      groups = Process.groups
+      groups.delete(primary_group.gid)
+      groups.unshift(primary_group.gid).map { |gid| Etc.getgrgid(gid) }
+    end
+  end
+end

app/models/maya_script.rb

@@ -26,10 +26,18 @@ def cluster
   end
 
   def available_versions
-    ['2025']
+    if accad?
+      ['2023', '2025']
+    else
+      ['2025']
+    end
   end
 
   def job_name
     'maya-render'
   end
+
+  def accad?
+    CurrentUser.group_names.include?('mayaosu')
+  end
 end