class Chronic::Scalar

Constants

DAY_PORTIONS

Public Class Methods

make_year(year, bias) click to toggle source

Build a year from a 2 digit suffix

@example

make_year(96, 50) #=> 1996
make_year(79, 20) #=> 2079
make_year(00, 50) #=> 2000

@param [Integer] year The two digit year to build from @param [Integer] bias The amount of future years to bias @return [Integer] The 4 digit year

# File lib/chronic/scalar.rb, line 78
def self.make_year(year, bias)
  return year if year.to_s.size > 2
  start_year = Chronic.time_class.now.year - bias
  century = (start_year / 100) * 100
  full_year = century + year
  full_year += 100 if full_year < start_year
  full_year
end
scan(tokens, options) click to toggle source

Scan an Array of {Token}s and apply any necessary Scalar tags to each token

@param [Array<Token>] tokens Array of tokens to scan @param [Hash] options Options specified in {Chronic.parse} @return [Array] list of tokens

# File lib/chronic/scalar.rb, line 11
def self.scan(tokens, options)
  tokens.each_index do |i|
    if t = scan_for_scalars(tokens[i], tokens[i + 1]) then tokens[i].tag(t) end
    if t = scan_for_days(tokens[i], tokens[i + 1]) then tokens[i].tag(t) end
    if t = scan_for_months(tokens[i], tokens[i + 1]) then tokens[i].tag(t) end
    if t = scan_for_years(tokens[i], tokens[i + 1], options) then tokens[i].tag(t) end
  end
end
scan_for_days(token, post_token) click to toggle source

@param [Token] token @param [Token] post_token @return [ScalarDay, nil]

# File lib/chronic/scalar.rb, line 34
def self.scan_for_days(token, post_token)
  if token.word =~ %r^\d\d?$/
    toi = token.word.to_i
    unless toi > 31 || toi < 1 || (post_token && DAY_PORTIONS.include?(post_token.word))
      return ScalarDay.new(toi)
    end
  end
end
scan_for_months(token, post_token) click to toggle source

@param [Token] token @param [Token] post_token @return [ScalarMonth, nil]

# File lib/chronic/scalar.rb, line 46
def self.scan_for_months(token, post_token)
  if token.word =~ %r^\d\d?$/
    toi = token.word.to_i
    unless toi > 12 || toi < 1 || (post_token && DAY_PORTIONS.include?(post_token.word))
      return ScalarMonth.new(toi)
    end
  end
end
scan_for_scalars(token, post_token) click to toggle source

@param [Token] token @param [Token] post_token @return [Scalar, nil]

# File lib/chronic/scalar.rb, line 23
def self.scan_for_scalars(token, post_token)
  if token.word =~ %r^\d*$/
    unless post_token && DAY_PORTIONS.include?(post_token.word)
      return Scalar.new(token.word.to_i)
    end
  end
end
scan_for_years(token, post_token, options) click to toggle source

@param [Token] token @param [Token] post_token @param [Hash] options Options specified in {Chronic.parse} @return [ScalarYear, nil]

# File lib/chronic/scalar.rb, line 59
def self.scan_for_years(token, post_token, options)
  if token.word =~ %r^([1-9]\d)?\d\d?$/
    unless post_token && DAY_PORTIONS.include?(post_token.word)
      year = make_year(token.word.to_i, options[:ambiguous_year_future_bias])
      return ScalarYear.new(year.to_i)
    end
  end
end

Public Instance Methods

to_s() click to toggle source
# File lib/chronic/scalar.rb, line 87
def to_s
  'scalar'
end