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require "date"
require "active_support/inflector/methods"
require "active_support/core_ext/date/zones"
require "active_support/core_ext/module/remove_method"
class Date
DATE_FORMATS = {
short: "%d %b",
long: "%B %d, %Y",
db: "%Y-%m-%d",
number: "%Y%m%d",
long_ordinal: lambda { |date|
day_format = ActiveSupport::Inflector.ordinalize(date.day)
date.strftime("%B #{day_format}, %Y") # => "April 25th, 2007"
},
rfc822: "%d %b %Y",
iso8601: lambda { |date| date.iso8601 }
}
# Ruby 1.9 has Date#to_time which converts to localtime only.
remove_method :to_time
# Ruby 1.9 has Date#xmlschema which converts to a string without the time
# component. This removal may generate an issue on FreeBSD, that's why we
# need to use remove_possible_method here
remove_possible_method :xmlschema
# Convert to a formatted string. See DATE_FORMATS for predefined formats.
#
# This method is aliased to <tt>to_s</tt>.
#
# date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
#
# date.to_formatted_s(:db) # => "2007-11-10"
# date.to_s(:db) # => "2007-11-10"
#
# date.to_formatted_s(:short) # => "10 Nov"
# date.to_formatted_s(:number) # => "20071110"
# date.to_formatted_s(:long) # => "November 10, 2007"
# date.to_formatted_s(:long_ordinal) # => "November 10th, 2007"
# date.to_formatted_s(:rfc822) # => "10 Nov 2007"
# date.to_formatted_s(:iso8601) # => "2007-11-10"
#
# == Adding your own date formats to to_formatted_s
# You can add your own formats to the Date::DATE_FORMATS hash.
# Use the format name as the hash key and either a strftime string
# or Proc instance that takes a date argument as the value.
#
# # config/initializers/date_formats.rb
# Date::DATE_FORMATS[:month_and_year] = '%B %Y'
# Date::DATE_FORMATS[:short_ordinal] = ->(date) { date.strftime("%B #{date.day.ordinalize}") }
def to_formatted_s(format = :default)
if formatter = DATE_FORMATS[format]
if formatter.respond_to?(:call)
formatter.call(self).to_s
else
strftime(formatter)
end
else
to_default_s
end
end
alias_method :to_default_s, :to_s
alias_method :to_s, :to_formatted_s
# Overrides the default inspect method with a human readable one, e.g., "Mon, 21 Feb 2005"
def readable_inspect
strftime("%a, %d %b %Y")
end
alias_method :default_inspect, :inspect
alias_method :inspect, :readable_inspect
# Converts a Date instance to a Time, where the time is set to the beginning of the day.
# The timezone can be either :local or :utc (default :local).
#
# date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
#
# date.to_time # => 2007-11-10 00:00:00 0800
# date.to_time(:local) # => 2007-11-10 00:00:00 0800
#
# date.to_time(:utc) # => 2007-11-10 00:00:00 UTC
#
# NOTE: The :local timezone is Ruby's *process* timezone, i.e. ENV['TZ'].
# If the *application's* timezone is needed, then use +in_time_zone+ instead.
def to_time(form = :local)
raise ArgumentError, "Expected :local or :utc, got #{form.inspect}." unless [:local, :utc].include?(form)
::Time.send(form, year, month, day)
end
# Returns a string which represents the time in used time zone as DateTime
# defined by XML Schema:
#
# date = Date.new(2015, 05, 23) # => Sat, 23 May 2015
# date.xmlschema # => "2015-05-23T00:00:00+04:00"
def xmlschema
in_time_zone.xmlschema
end
end
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