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module TimeSpecs
class SubTime < Time; end
class MethodHolder
class << self
define_method(:now, &Time.method(:now))
define_method(:new, &Time.method(:new))
end
end
class Timezone
def initialize(options)
@offset = options[:offset]
end
def local_to_utc(t)
t - @offset
end
def utc_to_local(t)
t + @offset
end
end
class TimezoneMethodCallRecorder < Timezone
def initialize(options, &blk)
super(options)
@blk = blk
end
def local_to_utc(t)
@blk.call(t)
super
end
def utc_to_local(t)
@blk.call(t)
super
end
end
class TimeLikeArgumentRecorder
def self.result
arguments = []
zone = TimeSpecs::TimezoneMethodCallRecorder.new(offset: 0) do |obj|
arguments << obj
end
# ensure timezone's methods are called at least once
Time.new(2000, 1, 1, 12, 0, 0, zone)
return arguments[0]
end
end
Z = Struct.new(:offset, :abbr)
Zone = Struct.new(:std, :dst, :dst_range)
Zones = {
"Asia/Colombo" => Zone[Z[5*3600+30*60, "MMT"], nil, nil],
"Europe/Kiev" => Zone[Z[2*3600, "EET"], Z[3*3600, "EEST"], 4..10],
"PST" => Zone[Z[(-9*60*60), "PST"], nil, nil],
}
class TimezoneWithName < Timezone
attr_reader :name
def initialize(options)
@name = options[:name]
@std, @dst, @dst_range = *Zones[@name]
end
def dst?(t)
@dst_range&.cover?(t.mon)
end
def zone(t)
(dst?(t) ? @dst : @std)
end
def utc_offset(t)
zone(t)&.offset || 0
end
def abbr(t)
zone(t)&.abbr
end
def local_to_utc(t)
t - utc_offset(t)
end
def utc_to_local(t)
t + utc_offset(t)
end
end
class TimeWithFindTimezone < Time
def self.find_timezone(name)
TimezoneWithName.new(name: name.to_s)
end
end
TimezoneWithAbbr = TimezoneWithName
end
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