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# frozen_string_literal: true
module RuboCop
module Cop
module Money
class ZeroMoney < Cop
# `Money.zero` and it's alias `empty`, with or without currency
# argument is removed in favour of the more explicit Money.new
# syntax. Supplying it with a real currency is preferred for
# additional currency safety checks.
#
# If no currency was supplied, it defaults to
# Money::NULL_CURRENCY which was the default setting of
# Money.default_currency and should effectively be the same. The cop
# can be configured with a ReplacementCurrency in case that is more
# appropriate for your application.
#
# @example
#
# # bad
# Money.zero
#
# # good when configured with `ReplacementCurrency: CAD`
# Money.new(0, 'CAD')
#
MSG = 'Money.zero is removed, use `Money.new(0, %<currency>s)`.'
def_node_matcher :money_zero, <<~PATTERN
(send (const {nil? cbase} :Money) {:zero :empty} $...)
PATTERN
def on_send(node)
money_zero(node) do |currency_arg|
add_offense(node, message: format(MSG, currency: replacement_currency(currency_arg)))
end
end
def autocorrect(node)
receiver, _ = *node
lambda do |corrector|
money_zero(node) do |currency_arg|
replacement_currency = replacement_currency(currency_arg)
corrector.replace(
node.loc.expression,
"#{receiver.source}.new(0, #{replacement_currency})"
)
end
end
end
private
def replacement_currency(currency_arg)
return currency_arg.first.source unless currency_arg.empty?
return "'#{cop_config['ReplacementCurrency']}'" if cop_config['ReplacementCurrency']
'Money::NULL_CURRENCY'
end
end
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems