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anonymous /business_hours.rb Secret
Created May 26, 2010

#!/usr/bin/env ruby
# require dependencies
require 'time'
require 'date'
class BusinessHours
DAYS = [:sun, :mon, :tue, :wed, :thu, :fri, :sat]
ONE_DAY = 24*60*60
class Day
attr_accessor :opening, :closing, :date
def initialize(opening_time, closing_time, date=nil)
self.update(opening_time, closing_time, date)
end
def close
self.opening, self.closing = nil, nil
end
def closed?
self.opening.nil?
end
def update(opening_time, closing_time, date=nil)
self.opening, self.closing, self.date = opening_time, closing_time, date
end
end
attr_accessor :business_hours, :exceptions
def initialize(opening_time, closing_time)
self.business_hours, self.exceptions = {}, {}
DAYS.each do |day|
self.business_hours[day] = Day.new(opening_time, closing_time)
end
end
def update(day, opening_time, closing_time)
if day.is_a?(Symbol)
self.business_hours[day].update(opening_time, closing_time)
else # string expected, it's a special date case
date = Date.parse(day)
self.exceptions[date.to_s] = Day.new(opening_time, closing_time)
end
end
def closed(*days)
days.each do |day|
if day.is_a?(Symbol)
self.business_hours[day].close
else
date = Date.parse(day)
self.exceptions[date.to_s] = Day.new(nil, nil)
end
end
end
def calculate_deadline(interval, starting_time)
start_at = time = Time.parse(starting_time)
date = time.strftime('%Y-%m-%d')
weekday = time.strftime('%a').downcase.to_sym
remaining_time = interval
while remaining_time.is_a?(Integer) && remaining_time > 0
d = self.exceptions[date] || self.business_hours[weekday]
unless d.closed?
from = Time.parse(date + ' ' + d.opening)
to = Time.parse(date + ' ' + d.closing)
if (from..to).include?(start_at)
from = start_at
end
remaining_time = deduct(remaining_time, (from..to))
end
return remaining_time unless remaining_time.is_a?(Integer)
time = time + ONE_DAY
date = time.strftime('%Y-%m-%d')
weekday = time.strftime('%a').downcase.to_sym
end
end
private
def deduct(count, range)
total = (range.last-range.first).to_i
if count >= total
count - total
else
range.first + count
end
end
end
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