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   before_create :assign_name
  21   after_create :after_ownership_change
  22   after_create :update_trash
  23
  24   before_update :before_ownership_change
  25   after_update :after_ownership_change
  26
  27   after_update :update_trash
  28   before_destroy :clear_permissions_and_trash
  29
  30   api_accessible :user, extend: :common do |t|
  31     t.add :name
  32     t.add :group_class
  33     t.add :description
  34     t.add :writable_by
  35     t.add :delete_at
  36     t.add :trash_at
  37     t.add :is_trashed
  38     t.add :properties
  39   end
  40
  41   def ensure_filesystem_compatible_name
  42     # project groups need filesystem-compatible names, but others
  43     # don't.
  44     super if group_class == 'project'
  45   end
  46
  47   def update_trash
  48     if trash_at_changed? or owner_uuid_changed?
  49       # The group was added or removed from the trash.
  50       #
  51       # Strategy:
  52       #   Compute project subtree, propagating trash_at to subprojects
  53       #   Remove groups that don't belong from trash
  54       #   Add/update groups that do belong in the trash
  55
  56       temptable = "group_subtree_#{rand(2**64).to_s(10)}"
  57       ActiveRecord::Base.connection.exec_query %{
  58 create temporary table #{temptable} on commit drop
  59 as select * from project_subtree_with_trash_at($1, LEAST($2, $3)::timestamp)
  60 },
  61                                                'Group.update_trash.select',
  62                                                [[nil, self.uuid],
  63                                                 [nil, TrashedGroup.find_by_group_uuid(self.owner_uuid).andand.trash_at],
  64                                                 [nil, self.trash_at]]
  65
  66       ActiveRecord::Base.connection.exec_delete %{
  67 delete from trashed_groups where group_uuid in (select target_uuid from #{temptable} where trash_at is NULL);
  68 },
  69                                             "Group.update_trash.delete"
  70
  71       ActiveRecord::Base.connection.exec_query %{
  72 insert into trashed_groups (group_uuid, trash_at)
  73   select target_uuid as group_uuid, trash_at from #{temptable} where trash_at is not NULL
  74 on conflict (group_uuid) do update set trash_at=EXCLUDED.trash_at;
  75 },
  76                                             "Group.update_trash.insert"
  77     end
  78   end
  79
  80   def before_ownership_change
  81     if owner_uuid_changed? and !self.owner_uuid_was.nil?
  82       MaterializedPermission.where(user_uuid: owner_uuid_was, target_uuid: uuid).delete_all
  83       update_permissions self.owner_uuid_was, self.uuid, REVOKE_PERM
  84     end
  85   end
  86
  87   def after_ownership_change
  88     if owner_uuid_changed?
  89       update_permissions self.owner_uuid, self.uuid, CAN_MANAGE_PERM
  90     end
  91   end
  92
  93   def clear_permissions_and_trash
  94     MaterializedPermission.where(target_uuid: uuid).delete_all
  95     ActiveRecord::Base.connection.exec_delete %{
  96 delete from trashed_groups where group_uuid=$1
  97 }, "Group.clear_permissions_and_trash", [[nil, self.uuid]]
  98
  99   end
 100
 101   def assign_name
 102     if self.new_record? and (self.name.nil? or self.name.empty?)
 103       self.name = self.uuid
 104     end
 105     true
 106   end
 107 end