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