Class: Choosy::Verifier

Inherits:
Object
  • Object
show all
Defined in:
lib/choosy/verifier.rb

Instance Method Summary collapse

Instance Method Details

#convert!(option, result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 81

def convert!(option, result)
  value = result[option.name]
  if exists? value
    result[option.name] = Converter.convert(option.cast_to, value)
  end
end

#populate!(option, result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 65

def populate!(option, result)
  return if special?(option)

  if !result.options.has_key?(option.name) # Not already set
    if !option.default_value.nil? # Has default?
      result[option.name] = option.default_value
    elsif option.cast_to == :boolean
      result[option.name] = false
    elsif option.arity.max > 1
      result[option.name] = []
    else
      result[option.name] = nil
    end
  end
end

#required?(option, result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/choosy/verifier.rb', line 59

def required?(option, result)
  if option.required? && result[option.name].nil?
    raise ValidationError.new("required option missing: '#{option.long_flag}'")
  end
end

#restricted?(option, result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/choosy/verifier.rb', line 88

def restricted?(option, result)
  return unless option.restricted?
  
  value = result[option.name]
  if option.arity.max > 1
    value.each do |val|
      check(option.allowable_values, val)
    end
  else
    check(option.allowable_values, value)
  end
end

#validate!(option, result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 101

def validate!(option, result)
  value = result[option.name]
  if option.validation_step && exists?(value)
    option.validation_step.call(value, result.options)
  end
end

#verify!(result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 3

def verify!(result)
  result.command.options.each do |option|
    required?(option, result)
    populate!(option, result)
    convert!(option, result)
    restricted?(option, result)
    validate!(option, result)
  end

  verify_arguments!(result)
end

#verify_arguments!(result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 23

def verify_arguments!(result)
  if result.command.is_a?(Choosy::Command)
    prefix = if result.subresult?
               "#{result.command.name}: "
             else
               ""
             end

    if result.command.arguments
      arguments = result.command.arguments

      result.args.map! do |value|
        Converter.convert(arguments.cast_to, value)
      end

      if result.args.length < arguments.arity.min
        raise Choosy::ValidationError.new("#{prefix}too few arguments (minimum is #{arguments.arity.min})")
      elsif result.args.length > arguments.arity.max
        raise Choosy::ValidationError.new("#{prefix}too many arguments (max is #{arguments.arity.max}): '#{result.args[arguments.arity.max]}'")
      end 

      result.args.each do |val|
        check(arguments.allowable_values, val)
      end if arguments.restricted?

      if arguments.validation_step
        arguments.validation_step.call(result.args, result.options)
      end
    else
      if result.args.length > 0
        raise Choosy::ValidationError.new("#{prefix}no arguments allowed: #{result.args.join(' ')}")
      end
    end
  end
end

#verify_special!(result) ⇒ Object 



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# File 'lib/choosy/verifier.rb', line 15

def verify_special!(result)
  result.command.options.each do |option|
    if special?(option)
      validate!(option, result) 
    end
  end
end