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module RiCal
#- ©2009 Rick DeNatale, All rights reserved. Refer to the file README.txt for the license
#
# RequireTimezones collects the timezones used by a given calendar component or set of calendar components
# For each timezone we collect it's id, and the earliest and latest times which reference the zone
class RequiredTimezones #:nodoc:
# A required timezone represents a single timezone and the earliest and latest times which reference it.
class RequiredTimezone #:nodoc:
attr_reader :first_time, :last_time, :timezone
def initialize(tzid)
@timezone = RiCal::Component::TZInfoTimezone.new(TZInfo::Timezone.get(tzid))
end
def tzid
@timezone.identifier
end
def add_datetime(date_time)
if @first_time
@first_time = date_time if date_time < @first_time
else
@first_time = date_time
end
if @last_time
@last_time = date_time if date_time > @last_time
else
@last_time = date_time
end
end
end
def required_timezones
@required_zones ||= {}
end
def required_zones
required_timezones.values
end
def export_to(export_stream)
required_zones.each do |z|
tzinfo_timezone =z.timezone
tzinfo_timezone.export_local_to(export_stream, z.first_time, z.last_time)
end
end
def add_datetime(date_time, tzid)
(required_timezones[tzid] ||= RequiredTimezone.new(tzid)).add_datetime(date_time)
end
end
end
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