Module: Irc::Utils::ParseTime

Defined in:
lib/rbot/core/utils/parse_time.rb

Constant Summary collapse

FLOAT_RX = 
/((?:\d*\.)?\d+)/
ONE_TO_NINE = 
{
  :one => 1,
  :two => 2,
  :three => 3,
  :four => 4,
  :five => 5,
  :six => 6,
  :seven => 7,
  :eight => 8,
  :nine => 9,
}
ONE_TO_NINE_RX = 
Regexp.new ONE_TO_NINE.keys.join('|')
TEENS_ETC = 
{
  :an => 1,
  :a => 1,
  :ten => 10,
  :eleven => 11,
  :twelve => 12,
  :thirteen => 13,
  :fourteen => 14,
  :fifteen => 15,
  :sixteen => 16,
  :seventeen => 17,
  :eighteen => 18,
  :nineteen => 19,
}
TEENS_ETC_RX = 
Regexp.new TEENS_ETC.keys.join('|')
ENTIES = 
{
  :twenty => 20,
  :thirty => 30,
  :forty => 40,
  :fifty => 50,
  :sixty => 60,
}
ENTIES_RX = 
Regexp.new ENTIES.keys.join('|')
LITNUM_RX = 
/(#{ONE_TO_NINE_RX})|(#{TEENS_ETC_RX})|(#{ENTIES_RX})\s*(#{ONE_TO_NINE_RX})?/
FRACTIONS = 
{
  :"half" => 0.5,
  :"half a" => 0.5,
  :"half an" => 0.5,
  :"a half" => 0.5,
  :"a quarter" => 0.25,
  :"a quarter of" => 0.25,
  :"a quarter of a" => 0.25,
  :"a quarter of an" => 0.25,
  :"three quarter" => 0.75,
  :"three quarters" => 0.75,
  :"three quarter of" => 0.75,
  :"three quarters of" => 0.75,
  :"three quarter of a" => 0.75,
  :"three quarters of a" => 0.75,
  :"three quarter of an" => 0.75,
  :"three quarters of an" => 0.75,
}
FRACTION_RX = 
Regexp.new FRACTIONS.keys.join('|')
UNITSPEC_RX = 
/(years?|months?|s(?:ec(?:ond)?s?)?|m(?:in(?:ute)?s?)?|h(?:(?:ou)?rs?)?|d(?:ays?)?|weeks?)/

Class Method Summary collapse

Class Method Details

.parse_period(str) ⇒ Object

example: half an hour, two and a half weeks, 5 seconds, an hour and 5 minutes



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# File 'lib/rbot/core/utils/parse_time.rb', line 107

def ParseTime.parse_period(str)
  clean = str.gsub(/\s+/, ' ').strip

  sofar = 0
  until clean.empty?
    if clean.sub!(/^(#{FRACTION_RX})\s+#{UNITSPEC_RX}/, '')
      # fraction followed by unit
      num = FRACTIONS[$1.intern]
      unit = ParseTime.time_unit($2)
    elsif clean.sub!(/^#{FLOAT_RX}\s*(?:\s+and\s+(#{FRACTION_RX})\s+)?#{UNITSPEC_RX}/, '')
      # float plus optional fraction followed by unit
      num = $1.to_f
      frac = $2
      unit = ParseTime.time_unit($3)
      clean.strip!
      if frac.nil? and clean.sub!(/^and\s+(#{FRACTION_RX})/, '')
        frac = $1
      end
      if frac
        num += FRACTIONS[frac.intern]
      end
    elsif clean.sub!(/^(?:#{LITNUM_RX})\s+(?:and\s+(#{FRACTION_RX})\s+)?#{UNITSPEC_RX}/, '')
      if $1
        num = ONE_TO_NINE[$1.intern]
      elsif $2
        num = TEENS_ETC[$2.intern]
      elsif $3
        num = ENTIES[$3.intern]
        if $4
          num += ONE_TO_NINE[$4.intern]
        end
      end
      frac = $5
      unit = ParseTime.time_unit($6)
      clean.strip!
      if frac.nil? and clean.sub!(/^and\s+(#{FRACTION_RX})/, '')
        frac = $1
      end
      if frac
        num += FRACTIONS[frac.intern]
      end
    else
      raise "invalid time string: #{clean} (parsed #{sofar} so far)"
    end
    sofar += num * unit
    clean.sub!(/^and\s+/, '')
  end
  return sofar
end

.time_unit(str) ⇒ Object

str must much UNITSPEC_RX



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# File 'lib/rbot/core/utils/parse_time.rb', line 83

def ParseTime.time_unit(str)
  case str[0,1].intern
  when :s
    1
  when :m
    if str[1,1] == 'o'
      # months
      3600*24*30
    else
      #minutes
      60
    end
  when :h
    3600
  when :d
    3600*24
  when :w
    3600*24*7
  when :y
    3600*24*365
  end
end