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Contents
module OptParseValidator
# Implementation of the Choice Option
class OptChoice < OptBase
# @param [ Array ] option See OptBase#new
# @param [ Hash ] attrs
# :choices [ Array ] The available choices (mandatory)
# :case_sensitive [ Boolean ] Default: false
def initialize(option, attrs = {})
raise Error, 'The :choices attribute is mandatory' unless attrs.key?(:choices)
raise Error, 'The :choices attribute must be an array' unless attrs[:choices].is_a?(Array)
super(option, attrs)
end
# @return [ Void ]
def append_help_messages
super
option << "Available choices: #{choices.join(', ')}"
end
# @return [ String ]
# If :case_sensitive if false (or nil), the downcased value of the choice
# will be returned
def validate(value)
value = value.to_s
unless attrs[:case_sensitive]
value.downcase!
choices.map!(&:downcase)
end
unless choices.include?(value)
raise Error, "'#{value}' is not a valid choice, expected one " \
"of the followings: #{choices.join(',')}"
end
value
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems