actionview/lib/action_view/helpers/tags/base.rb
# frozen_string_literal: true
module ActionView
module Helpers
module Tags # :nodoc:
class Base # :nodoc:
include Helpers::ActiveModelInstanceTag, Helpers::TagHelper, Helpers::FormTagHelper
attr_reader :object
def initialize(object_name, method_name, template_object, options = {})
@object_name, @method_name = object_name.to_s.dup, method_name.to_s.dup
@template_object = template_object
@object_name.sub!(/\[\]$/, "") || @object_name.sub!(/\[\]\]$/, "]")
@object = retrieve_object(options.delete(:object))
@skip_default_ids = options.delete(:skip_default_ids)
@allow_method_names_outside_object = options.delete(:allow_method_names_outside_object)
@options = options
if Regexp.last_match
@generate_indexed_names = true
@auto_index = retrieve_autoindex(Regexp.last_match.pre_match)
else
@generate_indexed_names = false
@auto_index = nil
end
end
# This is what child classes implement.
def render
raise NotImplementedError, "Subclasses must implement a render method"
end
private
def value
return unless object
if @allow_method_names_outside_object
object.public_send @method_name if object.respond_to?(@method_name)
else
object.public_send @method_name
end
end
def value_before_type_cast
return unless object
method_before_type_cast = @method_name + "_before_type_cast"
if value_came_from_user? && object.respond_to?(method_before_type_cast)
object.public_send(method_before_type_cast)
else
value
end
end
def value_came_from_user?
method_name = "#{@method_name}_came_from_user?"
!object.respond_to?(method_name) || object.public_send(method_name)
end
def retrieve_object(object)
if object
object
elsif @template_object.instance_variable_defined?("@#{@object_name}")
@template_object.instance_variable_get("@#{@object_name}")
end
rescue NameError
# As @object_name may contain the nested syntax (item[subobject]) we need to fallback to nil.
nil
end
def retrieve_autoindex(pre_match)
object = self.object || @template_object.instance_variable_get("@#{pre_match}")
if object && object.respond_to?(:to_param)
object.to_param
else
raise ArgumentError, "object[] naming but object param and @object var don't exist or don't respond to to_param: #{object.inspect}"
end
end
def add_default_name_and_id_for_value(tag_value, options)
if tag_value.nil?
add_default_name_and_id(options)
else
specified_id = options["id"]
add_default_name_and_id(options)
if specified_id.blank? && options["id"].present?
options["id"] += "_#{sanitized_value(tag_value)}"
end
end
end
def add_default_name_and_id(options)
index = name_and_id_index(options)
options["name"] = options.fetch("name") { tag_name(options["multiple"], index) }
if generate_ids?
options["id"] = options.fetch("id") { tag_id(index, options.delete("namespace")) }
if namespace = options.delete("namespace")
options["id"] = options["id"] ? "#{namespace}_#{options['id']}" : namespace
end
end
end
def tag_name(multiple = false, index = nil)
@template_object.field_name(@object_name, sanitized_method_name, multiple: multiple, index: index)
end
def tag_id(index = nil, namespace = nil)
@template_object.field_id(@object_name, @method_name, index: index, namespace: namespace)
end
def sanitized_method_name
@sanitized_method_name ||= @method_name.delete_suffix("?")
end
def sanitized_value(value)
value.to_s.gsub(/[\s.]/, "_").gsub(/[^-[[:word:]]]/, "").downcase
end
def name_and_id_index(options)
if options.key?("index")
options.delete("index") || ""
elsif @generate_indexed_names
@auto_index || ""
end
end
def generate_ids?
!@skip_default_ids
end
end
end
end
end