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# frozen_string_literal: true
require_relative "configuration"
module Necromancer
# Abstract converter used internally as a base for other converters
#
# @api private
class Converter
# Create an abstract converter
#
# @param [Object] source
# the source object type
#
# @param [Object] target
# the target object type
#
# @api public
def initialize(source = nil, target = nil)
@source = source if source
@target = target if target
@config ||= Configuration.new
end
# Run converter
#
# @api private
def call(*)
raise NotImplementedError
end
# Creates anonymous converter
#
# @api private
def self.create(&block)
Class.new(self) do
define_method(:initialize) { |*a| block.(self, *a) }
define_method(:call) { |value| convert.(value) }
end.new
end
# Fail with conversion type error
#
# @param [Object] value
# the value that cannot be converted
#
# @api private
def raise_conversion_type(value)
raise ConversionTypeError, "'#{value}' could not be converted " \
"from `#{source}` into `#{target}`"
end
attr_accessor :source
attr_accessor :target
attr_accessor :convert
# protected
attr_reader :config
end # Converter
end # Necromancer
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