+require 'assign_uuid'
class ArvadosModel < ActiveRecord::Base
self.abstract_class = true
attr_protected :modified_at
before_create :ensure_permission_to_create
before_update :ensure_permission_to_update
- before_create :update_modified_by_fields
- before_update :maybe_update_modified_by_fields
+ before_destroy :ensure_permission_to_destroy
+
+ before_validation :maybe_update_modified_by_fields
validate :ensure_serialized_attribute_type
+ validate :normalize_collection_uuids
+ validate :ensure_valid_uuids
has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
class PermissionDeniedError < StandardError
+ def http_status
+ 403
+ end
+ end
+
+ class UnauthorizedError < StandardError
+ def http_status
+ 401
+ end
end
def self.kind_class(kind)
- kind.match(/^arvados\#(.+?)(_list|List)?$/)[1].pluralize.classify.constantize rescue nil
- end
-
- def eager_load_associations
- self.class.columns.each do |col|
- re = col.name.match /^(.*)_kind$/
- if (re and
- self.respond_to? re[1].to_sym and
- (auuid = self.send((re[1] + '_uuid').to_sym)) and
- (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
- (aobject = aclass.where('uuid=?', auuid).first))
- self.instance_variable_set('@'+re[1], aobject)
+ kind.match(/^arvados\#(.+)$/)[1].classify.safe_constantize rescue nil
+ end
+
+ def href
+ "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
+ end
+
+ def self.searchable_columns operator
+ textonly_operator = !operator.match(/[<=>]/)
+ self.columns.collect do |col|
+ if col.name == 'owner_uuid'
+ nil
+ elsif [:string, :text].index(col.type)
+ col.name
+ elsif !textonly_operator and [:datetime, :integer].index(col.type)
+ col.name
end
+ end.compact
+ end
+
+ def self.attribute_column attr
+ self.columns.select { |col| col.name == attr.to_s }.first
+ end
+
+ # def eager_load_associations
+ # self.class.columns.each do |col|
+ # re = col.name.match /^(.*)_kind$/
+ # if (re and
+ # self.respond_to? re[1].to_sym and
+ # (auuid = self.send((re[1] + '_uuid').to_sym)) and
+ # (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
+ # (aobject = aclass.where('uuid=?', auuid).first))
+ # self.instance_variable_set('@'+re[1], aobject)
+ # end
+ # 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
end
end
+ def ensure_permission_to_destroy
+ raise PermissionDeniedError unless permission_to_destroy
+ end
+
+ def permission_to_destroy
+ permission_to_update
+ end
+
def maybe_update_modified_by_fields
- update_modified_by_fields if self.changed?
+ update_modified_by_fields if self.changed? or self.new_record?
end
def update_modified_by_fields
self.created_at ||= Time.now
- self.owner_uuid ||= current_default_owner
+ self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
self.modified_at = Time.now
self.modified_by_user_uuid = current_user ? current_user.uuid : nil
self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
end
end
end
+
+ def foreign_key_attributes
+ attributes.keys.select { |a| a.match /_uuid$/ }
+ end
+
+ def skip_uuid_read_permission_check
+ %w(modified_by_client_uuid)
+ end
+
+ def normalize_collection_uuids
+ foreign_key_attributes.each do |attr|
+ attr_value = send attr
+ if attr_value.is_a? String and
+ attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
+ begin
+ send "#{attr}=", Collection.normalize_uuid(attr_value)
+ rescue
+ # TODO: abort instead of silently accepting unnormalizable value?
+ end
+ end
+ end
+ end
+
+ @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
+
+ @@prefixes_hash = nil
+ def self.uuid_prefixes
+ unless @@prefixes_hash
+ @@prefixes_hash = {}
+ ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
+ if k.respond_to?(:uuid_prefix)
+ @@prefixes_hash[k.uuid_prefix] = k
+ end
+ end
+ end
+ @@prefixes_hash
+ end
+
+ def self.uuid_like_pattern
+ "_____-#{uuid_prefix}-_______________"
+ end
+
+ def ensure_valid_uuids
+ specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
+
+ foreign_key_attributes.each do |attr|
+ begin
+ if new_record? or send (attr + "_changed?")
+ attr_value = send attr
+ r = ArvadosModel::resource_class_for_uuid attr_value if attr_value
+ r = r.readable_by(current_user) if r and not skip_uuid_read_permission_check.include? attr
+ if r and r.where(uuid: attr_value).count == 0 and not specials.include? attr_value
+ errors.add(attr, "'#{attr_value}' not found")
+ end
+ end
+ rescue Exception => e
+ bt = e.backtrace.join("\n")
+ errors.add(attr, "'#{attr_value}' error '#{e}'\n#{bt}\n")
+ end
+ end
+ end
+
+ def self.resource_class_for_uuid(uuid)
+ if uuid.is_a? ArvadosModel
+ return uuid.class
+ end
+ unless uuid.is_a? String
+ return nil
+ end
+ if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
+ return Collection
+ end
+ resource_class = nil
+
+ Rails.application.eager_load!
+ uuid.match @@UUID_REGEX do |re|
+ return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]
+ end
+ nil
+ end
+
end
projects / arvados.git / blobdiff