services/api/app/models/group.rb

   1 # Copyright (C) The Arvados Authors. All rights reserved.
   2 #
   3 # SPDX-License-Identifier: AGPL-3.0
   4
   5 require 'can_be_an_owner'
   6 require 'trashable'
   7
   8 class Group < ArvadosModel
   9   include HasUuid
  10   include KindAndEtag
  11   include CommonApiTemplate
  12   include CanBeAnOwner
  13   include Trashable
  14
  15   # Posgresql JSONB columns should NOT be declared as serialized, Rails 5
  16   # already know how to properly treat them.
  17   attribute :properties, :jsonbHash, default: {}
  18
  19   validate :ensure_filesystem_compatible_name
  20   validate :check_group_class
  21   before_create :assign_name
  22   after_create :after_ownership_change
  23   after_create :update_trash
  24
  25   before_update :before_ownership_change
  26   after_update :after_ownership_change
  27
  28   after_create :add_role_manage_link
  29
  30   after_update :update_trash
  31   before_destroy :clear_permissions_and_trash
  32
  33   api_accessible :user, extend: :common do |t|
  34     t.add :name
  35     t.add :group_class
  36     t.add :description
  37     t.add :writable_by
  38     t.add :delete_at
  39     t.add :trash_at
  40     t.add :is_trashed
  41     t.add :properties
  42   end
  43
  44   def ensure_filesystem_compatible_name
  45     # project groups need filesystem-compatible names, but others
  46     # don't.
  47     super if group_class == 'project'
  48   end
  49
  50   def check_group_class
  51     if group_class != 'project' && group_class != 'role'
  52       errors.add :group_class, "value must be one of 'project' or 'role', was '#{group_class}'"
  53     end
  54     if group_class_changed? && !group_class_was.nil?
  55       errors.add :group_class, "cannot be modified after record is created"
  56     end
  57   end
  58
  59   def update_trash
  60     if saved_change_to_trash_at? or saved_change_to_owner_uuid?
  61       # The group was added or removed from the trash.
  62       #
  63       # Strategy:
  64       #   Compute project subtree, propagating trash_at to subprojects
  65       #   Remove groups that don't belong from trash
  66       #   Add/update groups that do belong in the trash
  67
  68       temptable = "group_subtree_#{rand(2**64).to_s(10)}"
  69       ActiveRecord::Base.connection.exec_query %{
  70 create temporary table #{temptable} on commit drop
  71 as select * from project_subtree_with_trash_at($1, LEAST($2, $3)::timestamp)
  72 },
  73                                                'Group.update_trash.select',
  74                                                [[nil, self.uuid],
  75                                                 [nil, TrashedGroup.find_by_group_uuid(self.owner_uuid).andand.trash_at],
  76                                                 [nil, self.trash_at]]
  77
  78       ActiveRecord::Base.connection.exec_delete %{
  79 delete from trashed_groups where group_uuid in (select target_uuid from #{temptable} where trash_at is NULL);
  80 },
  81                                             "Group.update_trash.delete"
  82
  83       ActiveRecord::Base.connection.exec_query %{
  84 insert into trashed_groups (group_uuid, trash_at)
  85   select target_uuid as group_uuid, trash_at from #{temptable} where trash_at is not NULL
  86 on conflict (group_uuid) do update set trash_at=EXCLUDED.trash_at;
  87 },
  88                                             "Group.update_trash.insert"
  89     end
  90   end
  91
  92   def before_ownership_change
  93     if owner_uuid_changed? and !self.owner_uuid_was.nil?
  94       MaterializedPermission.where(user_uuid: owner_uuid_was, target_uuid: uuid).delete_all
  95       update_permissions self.owner_uuid_was, self.uuid, REVOKE_PERM
  96     end
  97   end
  98
  99   def after_ownership_change
 100     if saved_change_to_owner_uuid?
 101       update_permissions self.owner_uuid, self.uuid, CAN_MANAGE_PERM
 102     end
 103   end
 104
 105   def clear_permissions_and_trash
 106     MaterializedPermission.where(target_uuid: uuid).delete_all
 107     ActiveRecord::Base.connection.exec_delete %{
 108 delete from trashed_groups where group_uuid=$1
 109 }, "Group.clear_permissions_and_trash", [[nil, self.uuid]]
 110
 111   end
 112
 113   def assign_name
 114     if self.new_record? and (self.name.nil? or self.name.empty?)
 115       self.name = self.uuid
 116     end
 117     true
 118   end
 119
 120   def ensure_owner_uuid_is_permitted
 121     if group_class == "role"
 122       @requested_manager_uuid = nil
 123       if new_record?
 124         @requested_manager_uuid = owner_uuid
 125         self.owner_uuid = system_user_uuid
 126         return true
 127       end
 128       if self.owner_uuid != system_user_uuid
 129         raise "Owner uuid for role must be system user"
 130       end
 131       raise PermissionDeniedError unless current_user.can?(manage: uuid)
 132       true
 133     else
 134       super
 135     end
 136   end
 137
 138   def add_role_manage_link
 139     if group_class == "role" && @requested_manager_uuid
 140       act_as_system_user do
 141        Link.create!(tail_uuid: @requested_manager_uuid,
 142                     head_uuid: self.uuid,
 143                     link_class: "permission",
 144                     name: "can_manage")
 145       end
 146     end
 147   end
 148 end