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# frozen_string_literal: true
require_relative "../converter"
require_relative "../null_converter"
module Necromancer
# Container for Numeric converter classes
module NumericConverters
INTEGER_MATCHER = /^\s*[-+]?\s*(\d[\d\s]*)?$/.freeze
FLOAT_MATCHER = /^\s*[-+]?([\d\s]*)(\.[\d\s]+)?([eE]?[-+]?[\d\s]+)?$/.freeze
# An object that converts a String to an Integer
class StringToIntegerConverter < Converter
# Convert string value to integer
#
# @example
# converter.call("1abc") # => 1
#
# @api public
def call(value, strict: config.strict)
Integer(value)
rescue StandardError
strict ? raise_conversion_type(value) : value.to_i
end
end
# An object that converts an Integer to a String
class IntegerToStringConverter < Converter
# Convert integer value to string
#
# @example
# converter.call(1) # => "1"
#
# @api public
def call(value, **_)
value.to_s
end
end
# An object that converts a String to a Float
class StringToFloatConverter < Converter
# Convert string to float value
#
# @example
# converter.call("1.2") # => 1.2
#
# @api public
def call(value, strict: config.strict)
Float(value)
rescue StandardError
strict ? raise_conversion_type(value) : value.to_f
end
end
# An object that converts a String to a Numeric
class StringToNumericConverter < Converter
# Convert string to numeric value
#
# @example
# converter.call("1.0") # => 1.0
#
# @example
# converter.call("1") # => 1
#
# @api public
def call(value, strict: config.strict)
case value
when INTEGER_MATCHER
StringToIntegerConverter.new(:string, :integer).(value, strict: strict)
when FLOAT_MATCHER
StringToFloatConverter.new(:string, :float).(value, strict: strict)
else
strict ? raise_conversion_type(value) : value
end
end
end
def self.load(conversions)
[
StringToIntegerConverter.new(:string, :integer),
IntegerToStringConverter.new(:integer, :string),
NullConverter.new(:integer, :integer),
StringToFloatConverter.new(:string, :float),
NullConverter.new(:float, :float),
StringToNumericConverter.new(:string, :numeric)
].each do |converter|
conversions.register converter
end
end
end # Conversion
end # Necromancer
|
