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# frozen_string_literal: true
require_relative "../converter"
require_relative "../null_converter"
module Necromancer
# Container for Boolean converter classes
module BooleanConverters
TRUE_MATCHER = /^(yes|y|on|t(rue)?|1)$/i.freeze
FALSE_MATCHER = /^(no|n|off|f(alse)?|0)$/i.freeze
# An object that converts a String to a Boolean
class StringToBooleanConverter < Converter
# Convert value to boolean type including range of strings
#
# @param [Object] value
#
# @example
# converter.call("True") # => true
#
# other values converted to true are:
# 1, t, T, TRUE, true, True, y, Y, YES, yes, Yes, on, ON
#
# @example
# converter.call("False") # => false
#
# other values coerced to false are:
# 0, f, F, FALSE, false, False, n, N, NO, no, No, off, OFF
#
# @api public
def call(value, strict: config.strict)
case value.to_s
when TRUE_MATCHER then true
when FALSE_MATCHER then false
else strict ? raise_conversion_type(value) : value
end
end
end
# An object that converts an Integer to a Boolean
class IntegerToBooleanConverter < Converter
# Convert integer to boolean
#
# @example
# converter.call(1) # => true
#
# @example
# converter.call(0) # => false
#
# @api public
def call(value, strict: config.strict)
!value.zero?
rescue StandardError
strict ? raise_conversion_type(value) : value
end
end
# An object that converts a Boolean to an Integer
class BooleanToIntegerConverter < Converter
# Convert boolean to integer
#
# @example
# converter.call(true) # => 1
#
# @example
# converter.call(false) # => 0
#
# @api public
def call(value, strict: config.strict)
if %w[TrueClass FalseClass].include?(value.class.name)
value ? 1 : 0
else
strict ? raise_conversion_type(value) : value
end
end
end
def self.load(conversions)
[
StringToBooleanConverter.new(:string, :boolean),
IntegerToBooleanConverter.new(:integer, :boolean),
BooleanToIntegerConverter.new(:boolean, :integer),
NullConverter.new(:boolean, :boolean)
].each do |converter|
conversions.register converter
end
end
end # BooleanConverters
end # Necromancer
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