X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/43c411ec1441ee1710dc33389d7451f7414a170f..926625e0650d6e055ee098798694af3006ae34a9:/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 a4a0148d84..4f2aa72161 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -1,22 +1,50 @@
+require 'assign_uuid'
 class ArvadosModel < ActiveRecord::Base
   self.abstract_class = true
 
   include CurrentApiClient      # current_user, current_api_client, etc.
 
   attr_protected :created_at
-  attr_protected :modified_by_user
-  attr_protected :modified_by_client
+  attr_protected :modified_by_user_uuid
+  attr_protected :modified_by_client_uuid
   attr_protected :modified_at
   before_create :ensure_permission_to_create
   before_update :ensure_permission_to_update
+  before_destroy :ensure_permission_to_destroy
   before_create :update_modified_by_fields
   before_update :maybe_update_modified_by_fields
   validate :ensure_serialized_attribute_type
 
+  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 href
+    "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
+  end
+
+  def self.searchable_columns
+    self.columns.collect do |col|
+      if [:string, :text].index(col.type) && col.name != 'owner_uuid'
+        col.name
+      end
+    end.compact
+  end
+
   def eager_load_associations
     self.class.columns.each do |col|
       re = col.name.match /^(.*)_kind$/
@@ -30,18 +58,33 @@ 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
-    raise "Permission denied" unless permission_to_create
+    raise PermissionDeniedError unless permission_to_create
   end
 
   def permission_to_create
-    current_user
+    current_user.andand.is_active
   end
 
   def ensure_permission_to_update
-    raise "Permission denied" unless permission_to_update
+    raise PermissionDeniedError unless permission_to_update
   end
 
   def permission_to_update
@@ -49,41 +92,53 @@ class ArvadosModel < ActiveRecord::Base
       logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
       return false
     end
+    if !current_user.is_active
+      logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
+      return false
+    end
+    return true if current_user.is_admin
     if self.uuid_changed?
       logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
       return false
     end
-    return true if current_user.is_admin
-    if self.owner_changed?
-      if current_user.uuid == self.owner or
-          current_user.can? write: self.owner
+    if self.owner_uuid_changed?
+      if current_user.uuid == self.owner_uuid or
+          current_user.can? write: self.owner_uuid
         # current_user is, or has :write permission on, the new owner
       else
-        logger.warn "User #{current_user.uuid} tried to change owner of #{self.class.to_s} #{self.uuid} to #{self.owner} but does not have permission to write to #{self.owner}"
+        logger.warn "User #{current_user.uuid} tried to change owner_uuid of #{self.class.to_s} #{self.uuid} to #{self.owner_uuid} but does not have permission to write to #{self.owner_uuid}"
         return false
       end
     end
-    if current_user.uuid == self.owner_was or
+    if current_user.uuid == self.owner_uuid_was or
         current_user.uuid == self.uuid or
-        current_user.can? write: self.owner_was
+        current_user.can? write: self.owner_uuid_was
       # current user is, or has :write permission on, the previous owner
       return true
     else
-      logger.warn "User #{current_user.uuid} tried to modify #{self.class.to_s} #{self.uuid} but does not have permission to write #{self.owner_was}"
+      logger.warn "User #{current_user.uuid} tried to modify #{self.class.to_s} #{self.uuid} but does not have permission to write #{self.owner_uuid_was}"
       return false
     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?
   end
 
   def update_modified_by_fields
     self.created_at ||= Time.now
-    self.owner ||= current_default_owner
+    self.owner_uuid ||= current_default_owner
     self.modified_at = Time.now
-    self.modified_by_user = current_user ? current_user.uuid : nil
-    self.modified_by_client = current_api_client ? current_api_client.uuid : nil
+    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
 
   def ensure_serialized_attribute_type
@@ -101,4 +156,30 @@ class ArvadosModel < ActiveRecord::Base
       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