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module ActionView
module Helpers
module Tags # :nodoc:
class Base # :nodoc:
include Helpers::ActiveModelInstanceTag, Helpers::TagHelper, Helpers::FormTagHelper
include FormOptionsHelper
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))
@options = options
@auto_index = Regexp.last_match ? retrieve_autoindex(Regexp.last_match.pre_match) : nil
end
# This is what child classes implement.
def render
raise NotImplementedError, "Subclasses must implement a render method"
end
private
def value(object)
object.public_send @method_name if object
end
def value_before_type_cast(object)
unless object.nil?
method_before_type_cast = @method_name + "_before_type_cast"
if value_came_from_user?(object) && object.respond_to?(method_before_type_cast)
object.public_send(method_before_type_cast)
else
value(object)
end
end
end
def value_came_from_user?(object)
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) }
options["id"] = options.fetch("id"){ tag_id(index) }
if namespace = options.delete("namespace")
options["id"] = options["id"] ? "#{namespace}_#{options['id']}" : namespace
end
end
def tag_name(multiple = false, index = nil)
# a little duplication to construct less strings
if index
"#{@object_name}[#{index}][#{sanitized_method_name}]#{"[]" if multiple}"
else
"#{@object_name}[#{sanitized_method_name}]#{"[]" if multiple}"
end
end
def tag_id(index = nil)
# a little duplication to construct less strings
if index
"#{sanitized_object_name}_#{index}_#{sanitized_method_name}"
else
"#{sanitized_object_name}_#{sanitized_method_name}"
end
end
def sanitized_object_name
@sanitized_object_name ||= @object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").sub(/_$/, "")
end
def sanitized_method_name
@sanitized_method_name ||= @method_name.sub(/\?$/,"")
end
def sanitized_value(value)
value.to_s.gsub(/\s/, "_").gsub(/[^-\w]/, "").downcase
end
def select_content_tag(option_tags, options, html_options)
html_options = html_options.stringify_keys
add_default_name_and_id(html_options)
if placeholder_required?(html_options)
raise ArgumentError, "include_blank cannot be false for a required field." if options[:include_blank] == false
options[:include_blank] ||= true unless options[:prompt]
end
value = options.fetch(:selected) { value(object) }
select = content_tag("select", add_options(option_tags, options, value), html_options)
if html_options["multiple"] && options.fetch(:include_hidden, true)
tag("input", disabled: html_options["disabled"], name: html_options["name"], type: "hidden", value: "") + select
else
select
end
end
def placeholder_required?(html_options)
# See https://html.spec.whatwg.org/multipage/forms.html#attr-select-required
html_options["required"] && !html_options["multiple"] && html_options.fetch("size", 1).to_i == 1
end
def add_options(option_tags, options, value = nil)
if options[:include_blank]
option_tags = tag_builder.content_tag_string("option", options[:include_blank].kind_of?(String) ? options[:include_blank] : nil, value: "") + "\n" + option_tags
end
if value.blank? && options[:prompt]
option_tags = tag_builder.content_tag_string("option", prompt_text(options[:prompt]), value: "") + "\n" + option_tags
end
option_tags
end
def name_and_id_index(options)
options.key?("index") ? options.delete("index") || "" : @auto_index
end
end
end
end
end
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