class Clamp::Option::Definition

# File lib/clamp/option/definition.rb, line 13
def initialize(switches, type, description, options = {})
  @switches = Array(switches)
  @type = type
  @description = description
  super(options)
  @multivalued = options[:multivalued]

  return unless options.key?(:required)

  @required = options[:required]
  # Do some light validation for conflicting settings.
  raise ArgumentError, "Specifying a :default value with :required doesn't make sense" if options.key?(:default)
  raise ArgumentError, "A required flag (boolean) doesn't make sense." if type == :flag
end

# File lib/clamp/option/definition.rb, line 64
def default_conversion_block
  Clamp.method(:truthy?) if flag?
end

# File lib/clamp/option/definition.rb, line 54
def extract_value(switch, arguments)
  if flag?
    flag_set?(switch)
  else
    raise ArgumentError, Clamp.message(:no_value_provided) if arguments.empty?

    arguments.shift
  end
end

# File lib/clamp/option/definition.rb, line 38
def flag?
  @type == :flag
end

# File lib/clamp/option/definition.rb, line 42
def flag_set?(switch)
  !(switch =~ /^--no-(.*)/ && switches.member?("--[no-]#{Regexp.last_match(1)}"))
end

# File lib/clamp/option/definition.rb, line 34
def handles?(switch)
  recognised_switches.member?(switch)
end

# File lib/clamp/option/definition.rb, line 68
def help_lhs
  lhs = switches.join(", ")
  lhs += " #{type}" unless flag?
  lhs
end

# File lib/clamp/option/definition.rb, line 30
def long_switch
  switches.find { |switch| switch =~ /^--/ }
end

# File lib/clamp/option/definition.rb, line 46
def read_method
  if flag?
    "#{super}?"
  else
    super
  end
end

# File lib/clamp/option/definition.rb, line 86
def infer_attribute_name
  raise Clamp::DeclarationError, "You must specify either a long-switch or an :attribute_value" unless long_switch

  inferred_name = long_switch.sub(/^--(\[no-\])?/, "").tr("-", "_")
  inferred_name += "_list" if multivalued?
  inferred_name
end

# File lib/clamp/option/definition.rb, line 76
def recognised_switches
  switches.map do |switch|
    if switch =~ /^--\[no-\](.*)/
      ["--#{Regexp.last_match(1)}", "--no-#{Regexp.last_match(1)}"]
    else
      switch
    end
  end.flatten
end

# File lib/clamp/option/definition.rb, line 94
def required_indicator
  Clamp.message(:required) if required?
end