Module: Alberich::PermissionedObject

Extended by:
ActiveSupport::Concern
Included in:
BasePermissionObject
Defined in:
app/models/alberich/permissioned_object.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object

Any methods here will be able to use the context of the ActiveRecord model the module is included in.



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# File 'app/models/alberich/permissioned_object.rb', line 97

def self.included(base)
  base.class_eval do
    after_create :update_derived_permissions_for_ancestors

    # Returns the list of privilege target types that are relevant for
    # permission checking purposes. This is used in setting derived
    # permissions -- there's no need to create denormalized permissions
    # for a role which only grants Provider privileges on a Pool
    # object. By default, this is just the current object's type
    def self.active_privilege_target_types
      [self.default_privilege_target_type] + self.additional_privilege_target_types
    end
    def self.additional_privilege_target_types
      []
    end
    def self.default_privilege_target_type
      self
    end
    def self.list_for_user(permission_session, user, action,
                           target_type=self.default_privilege_target_type)
      if permission_session.nil? or user.nil? or action.nil? or target_type.nil?
        return where("1=0")
      end
      if BasePermissionObject.general_permission_scope.
          has_privilege(permission_session, user, action, target_type)
        scoped
      else
        includes([:derived_permissions => {:role => :privileges,
                                           :entity => :session_entities}]).
          where("alberich_session_entities.user_id=:user and
                 alberich_session_entities.permission_session_id=:permission_session_id and
                 alberich_privileges.target_type=:target_type and
                 alberich_privileges.action=:action",
                {:user => user.id,
                 :permission_session_id => permission_session.id,
                 :target_type => target_type.name,
                 :action => action})
      end
    end
  end
end

Instance Method Details

#assign_owner_roles(user) ⇒ Object

assign owner role so that the creating user has permissions on the object Any roles defined on default_privilege_target_type with assign_to_owner==true will be assigned to the passed-in user on this object



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# File 'app/models/alberich/permissioned_object.rb', line 84

def assign_owner_roles(user)
  roles = Role.find(:all, :conditions => ["assign_to_owner =:assign and scope=:scope",
                                          { :assign => true,
                                            :scope => self.class.default_privilege_target_type.name}])
  roles.each do |role|
    Permission.create!(:role => role, :entity => Entity.for_target(user),
                       :permission_object => self)
  end
  self.reload
end

#derived_subtree(role = nil) ⇒ Object

Returns the list of objects to generate derived permissions for – by default just this object



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# File 'app/models/alberich/permissioned_object.rb', line 55

def derived_subtree(role = nil)
  [self]
end

#has_privilege(permission_session, user, action, target_type = nil) ⇒ Object 



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# File 'app/models/alberich/permissioned_object.rb', line 18

def has_privilege(permission_session, user, action, target_type=nil)
  return false if permission_session.nil? or user.nil? or action.nil?
  target_type = self.class.default_privilege_target_type if target_type.nil?
  if derived_permissions.includes(:role => :privileges,
                                  :entity => :session_entities).where(
    ["alberich_session_entities.user_id=:user and
      alberich_session_entities.permission_session_id=:permission_session_id and
      alberich_privileges.target_type=:target_type and
      alberich_privileges.action=:action",
      { :user => user.id,
        :permission_session_id => permission_session.id,
        :target_type => target_type.name,
        :action => action}]).any?
    return true
  else
    BasePermissionObject.general_permission_scope.permissions.
      includes(:role => :privileges,
               :entity => :session_entities).where(
    ["alberich_session_entities.user_id=:user and
      alberich_session_entities.permission_session_id=:permission_session_id and
      alberich_privileges.target_type=:target_type and
      alberich_privileges.action=:action",
      { :user => user.id,
        :permission_session_id => permission_session,
        :target_type => target_type.name,
        :action => action}]).any?
  end
end

#perm_ancestors ⇒ Object

Returns the list of objects to check for permissions on – by default this is empty (we don’t denormalize Global permissions as they’re handled as a separate case.)



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# File 'app/models/alberich/permissioned_object.rb', line 50

def perm_ancestors
  []
end

#update_derived_permissions_for_ancestors ⇒ Object

on obj creation, set inherited permissions for new object



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# File 'app/models/alberich/permissioned_object.rb', line 59

def update_derived_permissions_for_ancestors
  # for create hook this should normally be empty
  old_derived_permissions = Hash[derived_permissions.map{|p| [p.permission.id,p]}]
  perm_ancestors.each do |perm_obj|
    perm_obj.permissions.each do |permission|
      if permission.role.privilege_target_match(self.class.default_privilege_target_type)
        unless old_derived_permissions.delete(permission.id)
          derived_permissions.create(:entity_id => permission.entity_id,
                                     :role_id => permission.role_id,
                                     :permission => permission)
        end
      end
    end
  end
  # anything remaining in old_derived_permissions should be removed,
  # as would be expected if this hook is triggered by removing a
  # catalog entry for a deployable
  old_derived_permissions.each do |id, derived_perm|
    derived_perm.destroy
  end
  #reload
end