Class: Embulk::Guess::TimeFormatGuess::GuessPattern

Inherits:
Object
  • Object
show all
Includes:
Parts
Defined in:
lib/embulk/guess/time_format_guess.rb

Constant Summary collapse

YMD =

yyyy-MM-dd

/(?<year>#{YEAR})(?<date_delim>#{date_delims})(?<month>#{MONTH})\k<date_delim>(?<day>#{DAY})/
YMD_NODELIM = 
/(?<year>#{YEAR})(?<month>#{MONTH_NODELIM})(?<day>#{DAY_NODELIM})/
DMY =

dd/MM/yyyy

/(?<year>#{YEAR})(?<date_delim>#{date_delims})(?<month>#{MONTH})\k<date_delim>(?<day>#{DAY})/
DMY_NODELIM = 
/(?<year>#{YEAR})(?<month>#{MONTH_NODELIM})(?<day>#{DAY_NODELIM})/
TIME = 
/(?<hour>#{HOUR})(?<time_delim>#{time_delims})(?<minute>#{MINUTE})(?:\k<time_delim>(?<second>#{SECOND})(?:(?<frac_delim>#{frac_delims})(?<frac>#{frac}))?)?/
TIME_NODELIM = 
/(?<hour>#{HOUR_NODELIM})(?<minute>#{MINUTE_NODELIM})((?<second>#{SECOND_NODELIM})(?:(?<frac_delim>#{frac_delims})(?<frac>#{frac}))?)?/
TZ = 
/(?<zone_space> )?(?<zone>(?<zone_off>[\-\+]\d\d(?::?\d\d)?)|(?<zone_abb>[A-Z]{3}))|(?<z>Z)/

Constants included from Parts

Parts::DAY, Parts::DAY_NODELIM, Parts::HOUR, Parts::HOUR_NODELIM, Parts::MINUTE, Parts::MINUTE_NODELIM, Parts::MONTH, Parts::MONTH_NAME_FULL, Parts::MONTH_NAME_SHORT, Parts::MONTH_NODELIM, Parts::WEEKDAY_NAME_FULL, Parts::WEEKDAY_NAME_SHORT, Parts::YEAR

Instance Method Summary collapse

Instance Method Details

#match(text) ⇒ Object 



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# File 'lib/embulk/guess/time_format_guess.rb', line 161

def match(text)
  delimiters = []
  parts = []
  part_options = []

  if dm = (/^#{YMD}(?<rest>.*?)$/.match(text) or /^#{YMD_NODELIM}(?<rest>.*?)$/.match(text))
    date_delim = dm["date_delim"] rescue ""

    parts << :year
    part_options << nil
    delimiters << date_delim

    parts << :month
    part_options << part_heading_option(dm["month"])
    delimiters << date_delim

    parts << :day
    part_options << part_heading_option(dm["day"])

  elsif dm = (/^#{DMY}(?<rest>.*?)$/.match(text) or /^#{DMY_NODELIM}(?<rest>.*?)$/.match(text))
    date_delim = dm["date_delim"] rescue ""

    parts << :day
    part_options << part_heading_option(dm["day"])
    delimiters << date_delim

    parts << :month
    part_options << part_heading_option(dm["month"])
    delimiters << date_delim

    parts << :year
    part_options << nil
    delimiters << date_delim

  else
    date_delim = ""
    return nil
  end
  rest = dm["rest"]

  date_time_delims = /[ _T]/
  if tm = (
        /^(?<date_time_delim>#{date_time_delims})#{TIME}(?<rest>.*?)?$/.match(rest) or
        /^(?<date_time_delim>#{date_time_delims})#{TIME_NODELIM}(?<rest>.*?)?$/.match(rest) or
        (date_delim == "" && /^#{TIME_NODELIM}(?<rest>.*?)?$/.match(rest))
      )
    date_time_delim = tm["date_time_delim"] rescue ""
    time_delim = tm["time_delim"] rescue ""

    delimiters << date_time_delim
    parts << :hour
    part_options << part_heading_option(tm["hour"])

    delimiters << time_delim
    parts << :minute
    part_options << part_heading_option(tm["minute"])

    if tm["second"]
      delimiters << time_delim
      parts << :second
      part_options << part_heading_option(tm["second"])
    end

    if tm["frac"]
      delimiters << tm["frac_delim"]
      parts << :frac
      part_options << tm["frac"].size
    end

    rest = tm["rest"]
  end

  if zm = /^#{TZ}$/.match(rest)
    delimiters << zm["zone_space"] || ''
    if zm["z"]
      # TODO ISO 8601
      parts << :zone_off
    elsif zm["zone_off"]
      parts << :zone_off
    else
      parts << :zone_abb
    end
    part_options << nil

    return GuessMatch.new(delimiters, parts, part_options)

  elsif rest =~ /^\s*$/
    return GuessMatch.new(delimiters, parts, part_options)

  else
    return nil
  end
end

#part_heading_option(text) ⇒ Object 



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# File 'lib/embulk/guess/time_format_guess.rb', line 255

def part_heading_option(text)
  if text[0] == '0'
    :zero
  elsif text[0] == ' '
    :blank
  elsif text.size == 1
    :none
  else
    nil
  end
end