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module Chronic
class RepeaterWeekday < Repeater #:nodoc:
DAY_SECONDS = 86400 # (24 * 60 * 60)
DAYS = {
:sunday => 0,
:monday => 1,
:tuesday => 2,
:wednesday => 3,
:thursday => 4,
:friday => 5,
:saturday => 6
}
def initialize(type)
super
end
def next(pointer)
super
direction = pointer == :future ? 1 : -1
if !@current_weekday_start
@current_weekday_start = Chronic.construct(@now.year, @now.month, @now.day)
@current_weekday_start += direction * DAY_SECONDS
until is_weekday?(@current_weekday_start.wday)
@current_weekday_start += direction * DAY_SECONDS
end
else
loop do
@current_weekday_start += direction * DAY_SECONDS
break if is_weekday?(@current_weekday_start.wday)
end
end
Span.new(@current_weekday_start, @current_weekday_start + DAY_SECONDS)
end
def this(pointer = :future)
super
case pointer
when :past
self.next(:past)
when :future, :none
self.next(:future)
end
end
def offset(span, amount, pointer)
direction = pointer == :future ? 1 : -1
num_weekdays_passed = 0; offset = 0
until num_weekdays_passed == amount
offset += direction * DAY_SECONDS
num_weekdays_passed += 1 if is_weekday?((span.begin+offset).wday)
end
span + offset
end
def width
DAY_SECONDS
end
def to_s
super << '-weekday'
end
private
def is_weekend?(day)
day == symbol_to_number(:saturday) || day == symbol_to_number(:sunday)
end
def is_weekday?(day)
!is_weekend?(day)
end
def symbol_to_number(sym)
DAYS[sym] || raise("Invalid symbol specified")
end
end
end
|
