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.send(
self.utc? ? :utc : :local,
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
alias :in :since
# Returns a new Time representing the time a number of specified months ago
def months_ago(months)
if months >= self.month
change(:year => self.year - 1, :month => 12).months_ago(months - self.month)
else
change(:year => self.year, :month => self.month - months)
end
end
def months_since(months)
if months + self.month > 12
change(:year => self.year + 1, :month => 1).months_since(months - (self.month == 1 ? 12 : (self.month + 1)))
else
change(:year => self.year, :month => self.month + months)
end
end
# Returns a new Time representing the time a number of specified years ago
def years_ago(years)
change(:year => self.year - years)
end
def years_since(years)
change(:year => self.year + years)
end
# Short-hand for months_ago(1)
def last_year
years_since(1)
end
# Short-hand for months_since(1)
def next_year
years_since(1)
end
# Short-hand for months_ago(1)
def last_month
months_ago(1)
end
# Short-hand for months_since(1)
def next_month
months_since(1)
end
# Returns a new Time representing the "start" of this week (Monday, 0:00)
def beginning_of_week
(self - self.wday.days).midnight + 1.day
end
alias :monday :beginning_of_week
alias :at_beginning_of_week :beginning_of_week
# Returns a new Time representing the start of the given day in next week (default is Monday).
def next_week(day = :monday)
days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
since(1.week).beginning_of_week.since(days_into_week[day].day).change(:hour => 0)
end
# 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)
change(:mday => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
end
alias :at_beginning_of_month :beginning_of_month
# Returns a new Time representing the start of the year (1st of january, 0:00)
def beginning_of_year
change(:month => 1,:mday => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
end
alias :at_beginning_of_year :beginning_of_year
# 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
end
end
end
end
