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require 'date'
require 'active_support/core_ext/time/calculations'
class String
# Converts a string to a Time value.
# The +form+ can be either :utc or :local (default :local).
#
# The time is parsed using Time.parse method.
# If +form+ is :local, then the time is in the system timezone.
# If the date part is missing then the current date is used and if
# the time part is missing then it is assumed to be 00:00:00.
#
# "13-12-2012".to_time # => 2012-12-13 00:00:00 +0100
# "06:12".to_time # => 2012-12-13 06:12:00 +0100
# "2012-12-13 06:12".to_time # => 2012-12-13 06:12:00 +0100
# "2012-12-13T06:12".to_time # => 2012-12-13 06:12:00 +0100
# "2012-12-13T06:12".to_time(:utc) # => 2012-12-13 05:12:00 UTC
def to_time(form = :local)
parts = Date._parse(self, false)
return if parts.empty?
now = Time.now
offset = parts[:offset]
utc_offset = form == :utc ? 0 : now.utc_offset
adjustment = offset ? offset - utc_offset : 0
Time.send(
form,
parts.fetch(:year, now.year),
parts.fetch(:mon, now.month),
parts.fetch(:mday, now.day),
parts.fetch(:hour, 0),
parts.fetch(:min, 0),
parts.fetch(:sec, 0) + parts.fetch(:sec_fraction, 0)
) - adjustment
end
# Converts a string to a Date value.
#
# "1-1-2012".to_date #=> Sun, 01 Jan 2012
# "01/01/2012".to_date #=> Sun, 01 Jan 2012
# "2012-12-13".to_date #=> Thu, 13 Dec 2012
# "12/13/2012".to_date #=> ArgumentError: invalid date
def to_date
::Date.parse(self, false) unless blank?
end
# Converts a string to a DateTime value.
#
# "1-1-2012".to_datetime #=> Sun, 01 Jan 2012 00:00:00 +0000
# "01/01/2012 23:59:59".to_datetime #=> Sun, 01 Jan 2012 23:59:59 +0000
# "2012-12-13 12:50".to_datetime #=> Thu, 13 Dec 2012 12:50:00 +0000
# "12/13/2012".to_datetime #=> ArgumentError: invalid date
def to_datetime
::DateTime.parse(self, false) unless blank?
end
end
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