Class: OptParseValidator::OptBase

Inherits:
Object
  • Object
show all
Defined in:
lib/opt_parse_validator/opts/base.rb

Overview

Base Option This Option should not be called, children should be used.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(option, attrs = {}) ⇒ OptBase

Note:

The :default and :normalize ‘logics’ are done in OptParseValidator::OptParser#add_option

Returns a new instance of OptBase.

Parameters:

  • option (Array) —

    See OptionParser#on

  • attrs (Hash) (defaults to: {})

Options Hash (attrs):

  • :required (Boolean)
  • :default (Mixed) —

    The default value to use if the option is not supplied

  • :value_if_empty (Mixed) —

    The value to use if no argument has been supplied

  • :normalize (Array<Symbol>) —

    See #normalize



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# File 'lib/opt_parse_validator/opts/base.rb', line 17

def initialize(option, attrs = {})
  @option = option
  @attrs  = attrs

  # TODO: incompatible attributes, ie required and require_unless at the same time

  append_help_messages
end

Instance Attribute Details

#attrs ⇒ Object (readonly)

Returns the value of attribute attrs.



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# File 'lib/opt_parse_validator/opts/base.rb', line 6

def attrs
  @attrs
end

#option ⇒ Object (readonly)

Returns the value of attribute option.



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# File 'lib/opt_parse_validator/opts/base.rb', line 6

def option
  @option
end

#required=(value) ⇒ Object (writeonly)

Sets the attribute required

Parameters:

  • value —

    the value to set the attribute required to.



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# File 'lib/opt_parse_validator/opts/base.rb', line 5

def required=(value)
  @required = value
end

Instance Method Details

#append_help_messages ⇒ Void

Returns:

  • (Void) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 27

def append_help_messages
  option << "Default: #{default}" if default
  option << "Value if no argument supplied: #{value_if_empty}" if value_if_empty
  option << 'This option is mandatory' if required?
  option << "This option is mandatory unless #{required_unless.join(' or ')} is/are supplied" unless required_unless.empty?
end

#choices ⇒ Array<Mixed>

Returns:

  • (Array<Mixed>) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 49

def choices
  attrs[:choices]
end

#default ⇒ Mixed

Returns:

  • (Mixed) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 44

def default
  attrs[:default]
end

#help_messages ⇒ Array<String>

Returns:

  • (Array<String>) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 115

def help_messages
  first_message_index = option.index { |e| e[0] != '-' }

  return [] unless first_message_index

  option[first_message_index..-1]
end

#normalize(value) ⇒ Mixed

Apply each methods from attrs to the value if possible User input should not be used in this attrs

e.g: normalize: :to_sym will return the symbol of the value

normalize: [:to_sym, :upcase] Will return the upercased symbol

Parameters:

  • value (Mixed)

Returns:

  • (Mixed) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 76

def normalize(value)
  [*attrs[:normalize]].each do |method|
    next unless method.is_a?(Symbol)

    value = value.send(method) if value.respond_to?(method)
  end

  value
end

#required? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 35

def required?
  @required ||= attrs[:required]
end

#required_unless ⇒ Object 



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# File 'lib/opt_parse_validator/opts/base.rb', line 39

def required_unless
  @required_unless ||= [*attrs[:required_unless]]
end

#to_long ⇒ String

Returns The raw long option (e.g: –proxy).

Returns:

  • (String) —

    The raw long option (e.g: –proxy)



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# File 'lib/opt_parse_validator/opts/base.rb', line 99

def to_long
  option.each do |option_attr|
    if option_attr =~ /^--/
      return option_attr.gsub(/ .*$/, '')
                        .gsub(/\[[^\]]+\]/, '')
    end
  end
  nil
end

#to_s ⇒ String

Returns:

  • (String) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 110

def to_s
  to_sym.to_s
end

#to_sym ⇒ Symbol

Returns:

  • (Symbol) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 87

def to_sym
  unless @symbol
    long_option = to_long

    raise Error, "Could not find option symbol for #{option}" unless long_option

    @symbol = long_option.gsub(/^--/, '').tr('-', '_').to_sym
  end
  @symbol
end

#validate(value) ⇒ Object

Parameters:

  • value (String) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 59

def validate(value)
  if value.nil? || value.to_s.empty?
    raise Error, 'Empty option value supplied' if value_if_empty.nil?
    return value_if_empty
  end
  value
end

#value_if_empty ⇒ Mixed

Returns:

  • (Mixed) 


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# File 'lib/opt_parse_validator/opts/base.rb', line 54

def value_if_empty
  attrs[:value_if_empty]
end