services/api/lib/current_api_client.rb

   1 module CurrentApiClient
   2   def current_user
   3     Thread.current[:user]
   4   end
   5
   6   def current_api_client
   7     Thread.current[:api_client]
   8   end
   9
  10   def current_api_client_authorization
  11     Thread.current[:api_client_authorization]
  12   end
  13
  14   def current_api_base
  15     Thread.current[:api_url_base]
  16   end
  17
  18   def current_default_owner
  19     # owner_uuid for newly created objects
  20     ((current_api_client_authorization &&
  21       current_api_client_authorization.default_owner_uuid) ||
  22      (current_user && current_user.default_owner_uuid) ||
  23      (current_user && current_user.uuid) ||
  24      nil)
  25   end
  26
  27   # Where is the client connecting from?
  28   def current_api_client_ip_address
  29     Thread.current[:api_client_ip_address]
  30   end
  31
  32   def system_user_uuid
  33     [Server::Application.config.uuid_prefix,
  34      User.uuid_prefix,
  35      '000000000000000'].join('-')
  36   end
  37
  38   def system_group_uuid
  39     [Server::Application.config.uuid_prefix,
  40      Group.uuid_prefix,
  41      '000000000000000'].join('-')
  42   end
  43
  44   def anonymous_group_uuid
  45     [Server::Application.config.uuid_prefix,
  46      Group.uuid_prefix,
  47      'anonymouspublic'].join('-')
  48   end
  49
  50   def anonymous_user_uuid
  51     [Server::Application.config.uuid_prefix,
  52      User.uuid_prefix,
  53      'anonymouspublic'].join('-')
  54   end
  55
  56   def system_user
  57     if not $system_user
  58       real_current_user = Thread.current[:user]
  59       Thread.current[:user] = User.new(is_admin: true,
  60                                        is_active: true,
  61                                        uuid: system_user_uuid)
  62       $system_user = User.where('uuid=?', system_user_uuid).first
  63       if !$system_user
  64         $system_user = User.new(uuid: system_user_uuid,
  65                                 is_active: true,
  66                                 is_admin: true,
  67                                 email: 'root',
  68                                 first_name: 'root',
  69                                 last_name: '')
  70         $system_user.save!
  71         $system_user.reload
  72       end
  73       Thread.current[:user] = real_current_user
  74     end
  75     $system_user
  76   end
  77
  78   def system_group
  79     if not $system_group
  80       act_as_system_user do
  81         ActiveRecord::Base.transaction do
  82           $system_group = Group.
  83             where(uuid: system_group_uuid).first_or_create do |g|
  84             g.update_attributes(name: "System group",
  85                                 description: "System group")
  86             User.all.collect(&:uuid).each do |user_uuid|
  87               Link.create(link_class: 'permission',
  88                           name: 'can_manage',
  89                           tail_kind: 'arvados#group',
  90                           tail_uuid: system_group_uuid,
  91                           head_kind: 'arvados#user',
  92                           head_uuid: user_uuid)
  93             end
  94           end
  95         end
  96       end
  97     end
  98     $system_group
  99   end
 100
 101   def act_as_system_user
 102     if block_given?
 103       act_as_user system_user do
 104         yield
 105       end
 106     else
 107       Thread.current[:user] = system_user
 108     end
 109   end
 110
 111   def act_as_user user
 112     user_was = Thread.current[:user]
 113     Thread.current[:user] = user
 114     begin
 115       yield
 116     ensure
 117       Thread.current[:user] = user_was
 118     end
 119   end
 120
 121   def anonymous_group
 122     if not $anonymous_group
 123       act_as_system_user do
 124         ActiveRecord::Base.transaction do
 125           $anonymous_group = Group.
 126           where(uuid: anonymous_group_uuid).first_or_create do |g|
 127             g.update_attributes(name: "Anonymous group",
 128                                 description: "Anonymous group")
 129           end
 130         end
 131       end
 132     end
 133     $anonymous_group
 134   end
 135
 136   def anonymous_user
 137     if not $anonymous_user
 138       act_as_system_user do
 139         $anonymous_user = User.where('uuid=?', anonymous_user_uuid).first
 140         if !$anonymous_user
 141           $anonymous_user = User.new(uuid: anonymous_user_uuid,
 142                                      is_active: false,
 143                                      is_admin: false,
 144                                      email: 'anonymouspublic',
 145                                      first_name: 'anonymouspublic',
 146                                      last_name: 'anonymouspublic')
 147           $anonymous_user.save!
 148           $anonymous_user.reload
 149         end
 150
 151         group_perms = Link.where(tail_uuid: anonymous_user_uuid,
 152                                  head_uuid: anonymous_group_uuid,
 153                                  link_class: 'permission',
 154                                  name: 'can_read')
 155
 156         if !group_perms.any?
 157           group_perm = Link.create!(tail_uuid: anonymous_user_uuid,
 158                                     head_uuid: anonymous_group_uuid,
 159                                     link_class: 'permission',
 160                                     name: 'can_read')
 161         end
 162       end
 163     end
 164     $anonymous_user
 165   end
 166
 167   def empty_collection_uuid
 168     'd41d8cd98f00b204e9800998ecf8427e+0'
 169   end
 170
 171   def empty_collection
 172     if not $empty_collection
 173       act_as_system_user do
 174         ActiveRecord::Base.transaction do
 175           $empty_collection = Collection.
 176             where(portable_data_hash: empty_collection_uuid).
 177             first_or_create!(manifest_text: '', owner_uuid: anonymous_group.uuid)
 178         end
 179       end
 180     end
 181     $empty_collection
 182   end
 183 end