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module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Time #:nodoc:
# Enables the use of time calculations within Time itself
module Calculations
# Seconds since midnight: Time.now.seconds_since_midnight
def seconds_since_midnight
self.hour.hours + self.min.minutes + self.sec + (self.usec/1.0e+6)
end
# Returns a new Time where one or more of the elements have been changed according to the +options+ parameter. The time options
# (hour, minute, sec, usec) reset cascadingly, so if only the hour is passed, then minute, sec, and usec is set to 0. If the hour and
# minute is passed, then sec and usec is set to 0.
def change(options, time_factory_method = :local)
::Time.send(
time_factory_method,
options[:year] || self.year,
options[:month] || self.month,
options[:mday] || self.mday,
options[:hour] || self.hour,
options[:min] || (options[:hour] ? 0 : self.min),
options[:sec] || ((options[:hour] || options[:min]) ? 0 : self.sec),
options[:usec] || ((options[:hour] || options[:min] || options[:usec]) ? 0 : self.usec)
)
end
# Returns a new Time representing the time a number of seconds ago, this is basically a wrapper around the Numeric extension
# Do not use this method in combination with x.months, use months_ago instead!
def ago(seconds)
seconds.until(self)
end
# Returns a new Time representing the time a number of seconds since the instance time, this is basically a wrapper around
#the Numeric extension. Do not use this method in combination with x.months, use months_since instead!
def since(seconds)
seconds.since(self)
end
# Returns a new Time representing the time a number of specified months ago
def months_ago(months, time_factory_method = :local)
if months >= self.month
change({ :year => self.year - 1, :month => 12 }, time_factory_method).months_ago(months - self.month)
else
change({ :year => self.year, :month => self.month - months }, time_factory_method)
end
end
def months_since(months, time_factory_method = :local)
if months + self.month > 12
change({ :year => self.year + 1, :month => 1 }, time_factory_method).months_since(
months - (self.month == 1 ? 12 : (self.month + 1))
)
else
change({ :year => self.year, :month => self.month + months }, time_factory_method)
end
end
# Returns a new Time representing the "start" of this week (sunday, 0:00)
def beginning_of_week
(self - self.wday.days).midnight
end
alias :sunday :beginning_of_week
alias :at_beginning_of_week :beginning_of_week
# Returns a new Time representing the start of the day (0:00)
def beginning_of_day
self - self.seconds_since_midnight
end
alias :midnight :beginning_of_day
alias :at_midnight :beginning_of_day
alias :at_beginning_of_day :beginning_of_day
# Returns a new Time representing the start of the month (1st of the month, 0:00)
def beginning_of_month
self - ((self.mday-1).days + self.seconds_since_midnight)
end
alias :at_beginning_of_month :beginning_of_month
# Convenience method which returns a new Time representing the time 1 day ago
def yesterday
self.ago(1.day)
end
# Convenience method which returns a new Time representing the time 1 day since the instance time
def tomorrow
self.since(1.day)
end
# Returns a new Time of the current day at 9:00 (am) in the morning
def in_the_morning(time_factory_method = :local)
change({:hour => 9}, time_factory_method)
end
# Returns a new Time of the current day at 14:00 in the afternoon
def in_the_afternoon(time_factory_method = :local)
change({:hour => 14}, time_factory_method)
end
end
end
end
end
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