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# frozen_string_literal: true
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
module Redmine
module SafeAttributes
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
# Declares safe attributes
# An optional Proc can be given for conditional inclusion
#
# Example:
# safe_attributes 'title', 'pages'
# safe_attributes 'isbn', :if => {|book, user| book.author == user}
def safe_attributes(*args)
@safe_attributes ||= []
if args.empty?
if superclass.include?(Redmine::SafeAttributes)
@safe_attributes + superclass.safe_attributes
else
@safe_attributes
end
else
options = args.last.is_a?(Hash) ? args.pop : {}
@safe_attributes << [args, options]
end
end
end
# Returns an array that can be safely set by user or current user
#
# Example:
# book.safe_attributes # => ['title', 'pages']
# book.safe_attributes(book.author) # => ['title', 'pages', 'isbn']
def safe_attribute_names(user=nil)
return @safe_attribute_names if @safe_attribute_names && user.nil?
names = []
self.class.safe_attributes.collect do |attrs, options|
if options[:if].nil? || options[:if].call(self, user || User.current)
names += attrs.collect(&:to_s)
end
end
names.uniq!
@safe_attribute_names = names if user.nil?
names
end
# Returns true if attr can be set by user or the current user
def safe_attribute?(attr, user=nil)
safe_attribute_names(user).include?(attr.to_s)
end
# Returns a hash with unsafe attributes removed
# from the given attrs hash
#
# Example:
# book.delete_unsafe_attributes({'title' => 'My book', 'foo' => 'bar'})
# # => {'title' => 'My book'}
def delete_unsafe_attributes(attrs, user=User.current)
safe = safe_attribute_names(user)
attrs.dup.delete_if {|k,v| !safe.include?(k.to_s)}
end
# Sets attributes from attrs that are safe
# attrs is a Hash with string keys
def safe_attributes=(attrs, user=User.current)
if attrs.respond_to?(:to_unsafe_hash)
attrs = attrs.to_unsafe_hash
end
return unless attrs.is_a?(Hash)
self.attributes = delete_unsafe_attributes(attrs, user)
end
end
end
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