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module IceCube
module Validations::MonthlyInterval
def interval(interval)
interval = normalized_interval(interval)
verify_alignment(interval, :month, :interval) { |error| raise error }
@interval = interval
replace_validations_for(:interval, [Validation.new(@interval)])
clobber_base_validations(:month)
self
end
class Validation
attr_reader :interval
def initialize(interval)
@interval = interval
end
def type
:month
end
def dst_adjust?
true
end
def validate(step_time, start_time)
t0, t1 = start_time, step_time
months = (t1.month - t0.month) +
(t1.year - t0.year) * 12
offset = (months % interval).nonzero?
interval - offset if offset
end
def build_s(builder)
builder.base = IceCube::I18n.t('ice_cube.each_month', count: interval)
end
def build_hash(builder)
builder[:interval] = interval
end
def build_ical(builder)
builder['FREQ'] << 'MONTHLY'
builder['INTERVAL'] << interval unless interval == 1
end
end
end
end
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