X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/f12986389693d4155847204210d9c84492ac6837..41f2b53c35ec79498a513cce2e2fd9019e769c70:/services/api/lib/current_api_client.rb

diff --git a/services/api/lib/current_api_client.rb b/services/api/lib/current_api_client.rb
index 94bd2b56a8..eaf54da143 100644
--- a/services/api/lib/current_api_client.rb
+++ b/services/api/lib/current_api_client.rb
@@ -98,20 +98,47 @@ module CurrentApiClient
     $system_group
   end
 
+  def all_users_group_uuid
+    [Server::Application.config.uuid_prefix,
+     Group.uuid_prefix,
+     'fffffffffffffff'].join('-')
+  end
+
+  def all_users_group
+    if not $all_users_group
+      act_as_system_user do
+        ActiveRecord::Base.transaction do
+          $system_group = Group.
+            where(uuid: all_users_group_uuid).first_or_create do |g|
+            g.update_attributes(name: "All users",
+                                description: "All users")
+          end
+        end
+      end
+    end
+    $all_users_group
+  end
+
   def act_as_system_user
     if block_given?
-      user_was = Thread.current[:user]
-      Thread.current[:user] = system_user
-      begin
+      act_as_user system_user do
         yield
-      ensure
-        Thread.current[:user] = user_was
       end
     else
       Thread.current[:user] = system_user
     end
   end
 
+  def act_as_user user
+    user_was = Thread.current[:user]
+    Thread.current[:user] = user
+    begin
+      yield
+    ensure
+      Thread.current[:user] = user_was
+    end
+  end
+
   def anonymous_group
     if not $anonymous_group
       act_as_system_user do
@@ -158,4 +185,20 @@ module CurrentApiClient
     $anonymous_user
   end
 
+  def empty_collection_uuid
+    'd41d8cd98f00b204e9800998ecf8427e+0'
+  end
+
+  def empty_collection
+    if not $empty_collection
+      act_as_system_user do
+        ActiveRecord::Base.transaction do
+          $empty_collection = Collection.
+            where(portable_data_hash: empty_collection_uuid).
+            first_or_create!(manifest_text: '', owner_uuid: anonymous_group.uuid)
+        end
+      end
+    end
+    $empty_collection
+  end
 end