X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/343892aa0ef79cf607abbfd85a04a612990022e1..0b1fb2bd766d117745188ea321de08c904711c49:/services/api/app/models/arvados_model.rb

diff --git a/services/api/app/models/arvados_model.rb b/services/api/app/models/arvados_model.rb
index 2999b52713..8ee14b7936 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -1,3 +1,4 @@
+require 'assign_uuid'
 class ArvadosModel < ActiveRecord::Base
   self.abstract_class = true
 
@@ -13,6 +14,7 @@ class ArvadosModel < ActiveRecord::Base
   before_create :update_modified_by_fields
   before_update :maybe_update_modified_by_fields
   validate :ensure_serialized_attribute_type
+  validate :normalize_collection_uuids
 
   has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
 
@@ -57,6 +59,21 @@ class ArvadosModel < ActiveRecord::Base
     end
   end
 
+  def self.readable_by user
+    uuid_list = [user.uuid, *user.groups_i_can(:read)]
+    sanitized_uuid_list = uuid_list.
+      collect { |uuid| sanitize(uuid) }.join(', ')
+    or_references_me = ''
+    if self == Link and user
+      or_references_me = "OR (#{table_name}.link_class in (#{sanitize 'permission'}, #{sanitize 'resources'}) AND #{sanitize user.uuid} IN (#{table_name}.head_uuid, #{table_name}.tail_uuid))"
+    end
+    joins("LEFT JOIN links permissions ON permissions.head_uuid in (#{table_name}.owner_uuid, #{table_name}.uuid) AND permissions.tail_uuid in (#{sanitized_uuid_list}) AND permissions.link_class='permission'").
+      where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
+            true, user.is_admin,
+            uuid_list,
+            user.uuid)
+  end
+
   protected
 
   def ensure_permission_to_create
@@ -140,4 +157,48 @@ class ArvadosModel < ActiveRecord::Base
       end
     end
   end
+
+  def foreign_key_attributes
+    attributes.keys.select { |a| a.match /_uuid$/ }
+  end
+
+  def normalize_collection_uuids
+    foreign_key_attributes.each do |attr|
+      attr_value = send attr
+      if attr_value.is_a? String and
+          attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
+        begin
+          send "#{attr}=", Collection.normalize_uuid(attr_value)
+        rescue
+          # TODO: abort instead of silently accepting unnormalizable value?
+        end
+      end
+    end
+  end
+
+  def self.resource_class_for_uuid(uuid)
+    if uuid.is_a? ArvadosModel
+      return uuid.class
+    end
+    unless uuid.is_a? String
+      return nil
+    end
+    if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
+      return Collection
+    end
+    resource_class = nil
+
+    Rails.application.eager_load!
+    uuid.match /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/ do |re|
+      ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
+        if k.respond_to?(:uuid_prefix)
+          if k.uuid_prefix == re[1]
+            return k
+          end
+        end
+      end
+    end
+    nil
+  end
+
 end