class Ourdate
Convert a string into a single date (helped by String.thedate
)
Attributes
thedate[R]
Public Class Methods
build_datetime(year, month = 1, day = 1, hour = 0, min = 0, sec = 0, usec = 0)
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Construct a daylight saving time safe datetime, with arguments
# File lib/ndr_support/ourdate/build_datetime.rb, line 10 def self.build_datetime(year, month = 1, day = 1, hour = 0, min = 0, sec = 0, usec = 0) return nil if year.nil? default_timezone = ActiveRecord.default_timezone if default_timezone == :local # Time.local_time(year, month, day, hour, min, sec, usec).to_datetime # Behave like oracle_adapter.rb seconds = sec + Rational(usec, 10**6) time_array = [year, month, day, hour, min, seconds] begin #-- # TODO: Fails unit tests unless we .to_datetime here # but the risk is we lose the usec component unnecesssarily. # Investigate removing .to_datetime below. #++ Time.send(default_timezone, *time_array).to_datetime rescue zone_offset = default_timezone == :local ? DateTime.now.offset : 0 # Append zero calendar reform start to account for dates skipped by calendar reform DateTime.new(*time_array[0..5] << zone_offset << 0) rescue nil end else # Only supports fake GMT time -- needs improvement # Maybe use Time.zone.local or Time.local_time(year, month, day) Time.utc(year, month, day, hour, min, sec, usec).to_datetime end end
date_difference_in_years(date2, date1)
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Compute date difference in years (e.g. patient age), as an integer For a positive result, the later date should be the first argument. Leap days are treated as for age calculations.
# File lib/ndr_support/ourdate.rb, line 63 def self.date_difference_in_years(date2, date1) (date2.strftime('%Y%m%d').sub(/0229$/, '0228').to_i - date1.strftime('%Y%m%d').sub(/0229$/, '0228').to_i) / 10_000 end
new(x = nil)
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# File lib/ndr_support/ourdate.rb, line 30 def initialize(x = nil) if x.is_a?(Date) @thedate = x elsif x.is_a?(Time) @thedate = x.to_datetime elsif x.is_a?(String) self.source = x else @thedate = nil end end
today()
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We need a daylight saving time safe was of defining the date today.
# File lib/ndr_support/ourdate.rb, line 13 def self.today current_time = Time.now #-- # TODO: Use Ourdate.build_datetime everywhere below: #++ default_timezone = ActiveRecord.default_timezone if default_timezone == :local build_datetime(current_time.year, current_time.month, current_time.day) else #-- # Only supports fake GMT time -- needs improvement # Maybe use Time.zone.local or Time.local_time(year, month, day) #++ Time.gm(current_time.year, current_time.month, current_time.day, 0, 0, 0, 0).to_datetime end end
Public Instance Methods
empty?()
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# File lib/ndr_support/ourdate.rb, line 46 def empty? # An unspecified date will be empty. A valid date will not. @thedate.nil? end
to_s()
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# File lib/ndr_support/ourdate.rb, line 42 def to_s @thedate ? @thedate.to_date.to_formatted_s(:ui) : '' end
Private Instance Methods
source=(s)
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# File lib/ndr_support/ourdate.rb, line 51 def source=(s) dr = Daterange.new(s) if dr.date1 == dr.date2 @thedate = dr.date1 else @thedate = nil end end