X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/4f552c0187f8c31d94ff74485c57ef7f9888597e..e537bd8dd1ac786164f192374e0d076bdc0327f3:/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 493cf828d1..c87a909e06 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -8,11 +8,16 @@ class ArvadosModel < ActiveRecord::Base
   attr_protected :modified_by_user_uuid
   attr_protected :modified_by_client_uuid
   attr_protected :modified_at
+  after_initialize :log_start_state
   before_create :ensure_permission_to_create
   before_update :ensure_permission_to_update
   before_destroy :ensure_permission_to_destroy
 
-  before_validation :maybe_update_modified_by_fields
+  before_create :update_modified_by_fields
+  before_update :maybe_update_modified_by_fields
+  after_create :log_create
+  after_update :log_update
+  after_destroy :log_destroy
   validate :ensure_serialized_attribute_type
   validate :normalize_collection_uuids
   validate :ensure_valid_uuids
@@ -74,14 +79,48 @@ class ArvadosModel < ActiveRecord::Base
     sanitized_uuid_list = uuid_list.
       collect { |uuid| sanitize(uuid) }.join(', ')
     or_references_me = ''
-    if self == Link and user
+
+    if self == User
+      or_row_is_me = "OR (#{table_name}.uuid=#{sanitize user.uuid})"
+    end
+
+    if self == Link
       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)
+
+    if self == Log
+      or_object_uuid = ", #{table_name}.object_uuid"
+      or_object_owner = "OR (#{table_name}.object_owner_uuid in (#{sanitized_uuid_list}))"
+    end
+
+    # Link head points to this row, or to the owner of this row (the thing to be read)
+    # (or the object described by this row, for logs table only)
+    # Link tail originates from this user, or a group that is readable by this
+    # user (the identity with authorization to read)
+    # Link is any permission link ('write' and 'manage' implicitly include 'read')
+    # The existence of such a link is tested in the where clause as permissions.head_uuid IS NOT NULL.
+    # or
+    # User is admin
+    # or
+    # This row is owned by this user, or owned by a group readable by this user
+    # or
+    # This is the users table
+    # This row uuid is equal this user uuid
+    # or
+    # This is the links table
+    # This row is a permission link
+    # The current user is referenced in either the head or tail of the link
+    # or
+    # This is the logs table
+    # This object described by this row is owned by this user, or owned by a group readable by this user
+
+    joins("LEFT JOIN links permissions ON permissions.head_uuid in (#{table_name}.owner_uuid, #{table_name}.uuid #{or_object_uuid}) AND permissions.tail_uuid in (#{sanitized_uuid_list}) AND permissions.link_class='permission'").
+      where("permissions.head_uuid IS NOT NULL OR ?=? OR #{table_name}.owner_uuid in (?) #{or_row_is_me} #{or_references_me} #{or_object_owner}",
+            user.is_admin, true, uuid_list).uniq
+  end
+
+  def logged_attributes
+    attributes
   end
 
   protected
@@ -145,7 +184,7 @@ class ArvadosModel < ActiveRecord::Base
   end
 
   def update_modified_by_fields
-    self.created_at ||= Time.now
+    self.updated_at = Time.now
     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
@@ -176,6 +215,10 @@ class ArvadosModel < ActiveRecord::Base
     %w(modified_by_client_uuid)
   end
 
+  def skip_uuid_existence_check
+    []
+  end
+
   def normalize_collection_uuids
     foreign_key_attributes.each do |attr|
       attr_value = send attr
@@ -213,22 +256,42 @@ class ArvadosModel < ActiveRecord::Base
     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")
+      if new_record? or send (attr + "_changed?")
+        next if skip_uuid_existence_check.include? attr
+        attr_value = send attr
+        next if specials.include? attr_value
+        if attr_value
+          if (r = ArvadosModel::resource_class_for_uuid attr_value)
+            unless skip_uuid_read_permission_check.include? attr
+              r = r.readable_by(current_user)
+            end
+            if r.where(uuid: attr_value).count == 0
+              errors.add(attr, "'#{attr_value}' not found")
+            end
           end
         end
-      rescue Exception => e
-        bt = e.backtrace.join("\n")
-        errors.add(attr, "'#{attr_value}' error '#{e}'\n#{bt}\n")
       end
     end
   end
 
+  class Email
+    def self.kind
+      "email"
+    end
+
+    def kind
+      self.class.kind
+    end
+
+    def self.readable_by (u)
+      self
+    end
+
+    def self.where (u)
+      [{:uuid => u[:uuid]}]
+    end
+  end
+
   def self.resource_class_for_uuid(uuid)
     if uuid.is_a? ArvadosModel
       return uuid.class
@@ -245,7 +308,45 @@ class ArvadosModel < ActiveRecord::Base
     uuid.match @@UUID_REGEX do |re|
       return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]
     end
+
+    if uuid.match /.+@.+/
+      return Email
+    end
+
     nil
   end
 
+  def log_start_state
+    @old_etag = etag
+    @old_attributes = logged_attributes
+  end
+
+  def log_change(event_type)
+    log = Log.new(event_type: event_type).fill_object(self)
+    yield log
+    log.save!
+    connection.execute "NOTIFY logs, '#{log.id}'"
+    log_start_state
+  end
+
+  def log_create
+    log_change('create') do |log|
+      log.fill_properties('old', nil, nil)
+      log.update_to self
+    end
+  end
+
+  def log_update
+    log_change('update') do |log|
+      log.fill_properties('old', @old_etag, @old_attributes)
+      log.update_to self
+    end
+  end
+
+  def log_destroy
+    log_change('destroy') do |log|
+      log.fill_properties('old', @old_etag, @old_attributes)
+      log.update_to nil
+    end
+  end
 end