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Contents
module Pio
# User options utility.
class Options
def self.mandatory_option(name)
if const_defined?(:MANDATORY_OPTIONS)
const_get(:MANDATORY_OPTIONS) << name
else
const_set(:MANDATORY_OPTIONS, [name])
end
end
def self.option(name)
const_set(:OPTIONS, []) unless const_defined?(:OPTIONS)
const_get(:OPTIONS) << name
end
private
def validate(user_options)
check_unknown user_options
check_mandatory user_options
end
def mandatory_options
klass = self.class
if klass.const_defined?(:MANDATORY_OPTIONS)
klass.const_get(:MANDATORY_OPTIONS)
else
[]
end
end
def options
klass = self.class
if klass.const_defined?(:OPTIONS)
klass.const_get(:OPTIONS)
else
[]
end
end
def check_unknown(user_options)
valid_options = mandatory_options + options
user_options.keys.each do |each|
fail "Unknown option: #{each}." unless valid_options.include?(each)
end
end
def check_mandatory(user_options)
self.class.const_get(:MANDATORY_OPTIONS).each do |each|
check_existence(user_options, each)
end
end
def check_existence(user_options, key)
value = user_options.fetch(key) do |missing_key|
fail ArgumentError, "The #{missing_key} option should be passed."
end
return if value
fail(ArgumentError, "The #{key} option shouldn't be #{value.inspect}.")
end
end
end
Version data entries
38 entries across 38 versions & 1 rubygems