Class: Ddate::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/ddate/cli.rb

Constant Summary collapse

FORMAT_RE = 
%r{\A\+(.*)\z}
OPTION_RE = 
%r{\A\-(\S)\z}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/ddate/cli.rb', line 11

def initialize
  self.formatter = Ddate::Formatter.new
end

Instance Attribute Details

#formatter ⇒ Object

Returns the value of attribute formatter.



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# File 'lib/ddate/cli.rb', line 9

def formatter
  @formatter
end

Instance Method Details

#handle_options(option) ⇒ Object 



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# File 'lib/ddate/cli.rb', line 50

def handle_options(option)
  case option.downcase
  when 'h'
    Ddate::USAGE
  when 'f'
    Ddate::FORMATTER_USAGE
  when 'v'
    Ddate::VERSION_STRING
  else
    raise DdateException.new "unknown option: #{option}"
  end
end

#run(args) ⇒ Object 



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# File 'lib/ddate/cli.rb', line 15

def run(args)

  num_args = args.count
  case num_args
  when 0
    # no arguments, run with today's date
    today = Date.today
    year, month, day = today.year, today.month, today.day
  when 1
    arg = args.shift.to_s
    if (help = arg.to_s.match(OPTION_RE) {|m| handle_options($1)})
      return help
    elsif (self.formatter = arg.to_s.match(FORMAT_RE) {|m| Ddate::Formatter.new($1)})
      # do nothing, drop through
    else
      raise DdateException.new "not enough arguments"
    end
    today = Date.today
    year, month, day = today.year, today.month, today.day
  when 3
    year, month, day = args.map { |i| Integer(i) }
  when 4
    fmt = args.shift.to_s
    if (self.formatter = fmt.match(FORMAT_RE) {|m| Ddate::Formatter.new($1)})
      # do nothing, drop through
    else
      raise DdateException.new "first argument when 4 given must be a format"
    end
    year, month, day = args.map { |i| Integer(i) }
  else
    raise DdateException.new "wrong number of arguments"
  end
  Ddate::Converter.new(year, month, day, formatter).to_s
end