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# frozen_string_literal: true
module Dry
module Types
# Common coercion functions used by the built-in `Params` and `JSON` types
#
# @api public
module Coercions
include Dry::Core::Constants
# @param [String, Object] input
#
# @return [nil] if the input is an empty string or nil
#
# @raise CoercionError
#
# @api public
def to_nil(input, &_block)
if input.nil? || empty_str?(input)
nil
elsif block_given?
yield
else
raise CoercionError, "#{input.inspect} is not nil"
end
end
# @param [#to_str, Object] input
#
# @return [Date, Object]
#
# @see Date.parse
#
# @api public
def to_date(input, &block)
if input.respond_to?(:to_str)
begin
::Date.parse(input)
rescue ArgumentError, RangeError => e
CoercionError.handle(e, &block)
end
elsif input.is_a?(::Date)
input
elsif block_given?
yield
else
raise CoercionError, "#{input.inspect} is not a string"
end
end
# @param [#to_str, Object] input
#
# @return [DateTime, Object]
#
# @see DateTime.parse
#
# @api public
def to_date_time(input, &block)
if input.respond_to?(:to_str)
begin
::DateTime.parse(input)
rescue ArgumentError => e
CoercionError.handle(e, &block)
end
elsif input.is_a?(::DateTime)
input
elsif block_given?
yield
else
raise CoercionError, "#{input.inspect} is not a string"
end
end
# @param [#to_str, Object] input
#
# @return [Time, Object]
#
# @see Time.parse
#
# @api public
def to_time(input, &block)
if input.respond_to?(:to_str)
begin
::Time.parse(input)
rescue ArgumentError => e
CoercionError.handle(e, &block)
end
elsif input.is_a?(::Time)
input
elsif block_given?
yield
else
raise CoercionError, "#{input.inspect} is not a string"
end
end
# @param [#to_sym, Object] input
#
# @return [Symbol, Object]
#
# @raise CoercionError
#
# @api public
def to_symbol(input, &block)
input.to_sym
rescue NoMethodError => e
CoercionError.handle(e, &block)
end
private
# Checks whether String is empty
#
# @param [String, Object] value
#
# @return [Boolean]
#
# @api private
def empty_str?(value)
EMPTY_STRING.eql?(value)
end
end
end
end
|
