Class: Calrom::OptionParser

Inherits:
Object
  • Object
show all
Defined in:
lib/calrom/option_parser.rb

Overview

Parses command line options, produces Config.

Defined Under Namespace

Classes: CustomizedOptionParser

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.call(argv) ⇒ Object 



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# File 'lib/calrom/option_parser.rb', line 15

def self.call(argv)
  self.new.call(argv)
end

Instance Method Details

#call(argv) ⇒ Object 



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# File 'lib/calrom/option_parser.rb', line 19

def call(argv)
  config = Config.new

  today = config.today
  year = today.year
  month = today.month
  day = nil
  another_day = nil

  range_type = nil

  opt_parser = CustomizedOptionParser.new do |opts|
    opts.banner = <<~EOS
    Usage: calrom [options] [arg1 [arg2]]

    Specifying date range (cal/ncal-compatible):

      calrom             - current month
      calrom -m 5        - May of the current year
      calrom -m 5p       - May of the previous year
      calrom -m 5f       - May of the following year
      calrom -m 5 2000   - May 2000
      calrom 5 2000      - also May 2000
      calrom 2000        - whole year 2000
      calrom -y 2000     - also whole year 2000
      calrom -y          - whole current year

    Specifying date range (not cal-compatible):

      calrom 2000-05-31              - specified day (only)
      calrom 2000-05-31 2000-07-01   - arbitrary date range
      calrom (--yesterday|--today|--tomorrow)

    EOS

    opts.separator 'Configuration files'

    opts.on('--config=CONFIG', 'load configuration from file (may be used multiple times, all specified files will be loaded)') do |value|
      config.configs << value
    end

    opts.separator 'Options selecting date range'

    # cal
    opts.on('-m MONTH', '--month=MONTH', 'display the specified month. \'f\' or \'p\' can be appended to display the same month of the following or previous year respectively') do |value|
      range_type = :month
      if value =~ /^(\d+)([pf])$/
        month = $1
        year = validate_year(year) + ($2 == 'f' ? 1 : -1)
      else
        month = value
      end
    end

    # cal
    opts.on('-y', '--year', 'display specified (or current) year') do |value|
      range_type = :year
    end

    opts.on('--yesterday', 'display previous day') do |value|
      day = Date.today - 1
      range_type = :day
    end

    opts.on('--today', 'display current day') do |value|
      day = Date.today
      range_type = :day
    end

    opts.on('--tomorrow', 'display following day') do |value|
      day = Date.today + 1
      range_type = :day
    end

    opts.separator "Options configuring liturgical calendar"

    opts.on('-c CAL', '--calendar=CAL', 'specify (sanctorale) calendar to use. If repeated, layers all specified calendars one over another') do |value|
      config.sanctorale << value
    end

    locales_help = I18n.available_locales.join(', ')
    opts.on('--locale=LOCALE', "override language in which temporale celebration titles are rendered (supported: #{locales_help})") do |value|
      config.locale = value.to_sym
    end

    opts.separator 'Options affecting presentation'

    opts.on('-l', '--list', 'display detailed listing of days and celebrations (synonym to --format=list)') do
      config.formatter = :list
    end

    supported_formats = %i(overview list csv json)
    formats_help = supported_formats.join(', ')
    opts.on('--format=FORMAT', supported_formats, "specify output format (supported: #{formats_help})") do |value|
      config.formatter = value
    end

    # cal
    opts.on('-e', '--easter', 'display date of Easter (only)') do
      config.formatter = :easter
    end

    opts.on('--calendars', 'list bundled calendars') do |value|
      config.formatter = :calendars
    end

    opts.on('--[no-]color', 'enable/disable colours (enabled by default)') do |value|
      config.colours = value
    end

    opts.separator 'Debugging options'

    # cal
    opts.on('-d YM', '--current-month=YM', 'use given month (YYYY-MM) as the current month (for debugging of date range selection)') do |value|
      year, month = value.split '-'
    end

    # cal
    opts.on('-H DATE', '--highlight-date=DATE', 'use given date as the current date (for debugging of highlighting)') do |value|
      config.today = validate_day value
    end

    opts.separator 'Information regarding calrom'

    opts.on('-V', '--version', 'display calrom version') do
      puts 'calrom v' + Calrom::VERSION
      exit
    end

    # Normally optparse defines this option by default, but once -H option is added,
    # for some reason -h (if not defined explicitly) is treated as -H.
    opts.on('-h', '--help', 'display this help') do
      puts opts
      exit
    end
  end

  arguments = opt_parser.parse argv

  iso_date_regexp = /^(\d{4}-\d{2}-\d{2})$/
  match(arguments) do
    with(_[iso_date_regexp.(date)]) do
      range_type = :day
      day = date
    end

    with(_[iso_date_regexp.(date), iso_date_regexp.(another_date)]) do
      range_type = :free
      day = date
      another_day = another_date
    end

    with(_[y]) do
      range_type ||= :year
      year = y
    end

    with(_[m, y]) do
      range_type = :month
      month, year = m, y
    end

    with([]) {}

    with(_) do
      raise InputError.new('too many arguments')
    end
  end

  config.date_range =
    build_date_range(
      range_type,
      validate_year(year),
      validate_month(month),
      day && validate_day(day),
      another_day && validate_day(another_day)
    )

  config.freeze
end