Module: InsaneHook::ClassMethods

Includes:
Constants, Errors
Defined in:
lib/insane_hook/class_methods.rb

Constant Summary

Constants included from Constants

InsaneHook::Constants::ARGS_VAR, InsaneHook::Constants::NO_ARG, InsaneHook::Constants::OPTIONAL_ARGS, InsaneHook::Constants::REQUIRED_ARGS, InsaneHook::Constants::RESULT_VAR

Instance Method Summary collapse

Instance Method Details

#call(**args, &block) ⇒ Object 



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# File 'lib/insane_hook/class_methods.rb', line 39

def call(**args, &block)
  if block_given?
    raise "Block cannot take arguments" if block.arity > 0
    raise "call method already defined" if self.instance_methods.include?(:call)
    define_method(:call) do
      result(nil)
      instance_eval(&block)
      self
    end
  else
    new(**args).call
  end
end

#fallbacks(key) ⇒ Object 



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# File 'lib/insane_hook/class_methods.rb', line 32

def fallbacks(key)
  fail "#{key} is not a symbol" unless key.is_a? Symbol
  args = self.class_variable_get(ARGS_VAR)
  args[OPTIONAL_ARGS] << key
  self.class_variable_set(ARGS_VAR, args)
end

#new(**args) ⇒ Object 



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# File 'lib/insane_hook/class_methods.rb', line 9

def new(**args)
  obj = self.allocate
  self.class_variable_get(ARGS_VAR)[REQUIRED_ARGS].each do |var|
    value = args.fetch(var) { raise(MissingArgumentError, "#{var} not provided in #{self.class}") }
    obj.instance_variable_set("@#{var}", value)
    obj.class.class_eval{attr_reader var}
  end
  self.class_variable_get(ARGS_VAR)[OPTIONAL_ARGS].each do |var|
    value = args.fetch(var, nil)
    obj.instance_variable_set("@#{var}", value)
    obj.class.class_eval{attr_reader var}
  end
  obj.send :initialize
  obj
end

#requires(key) ⇒ Object 



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# File 'lib/insane_hook/class_methods.rb', line 25

def requires(key)
  fail "#{key} is not a symbol" unless key.is_a? Symbol
  args = self.class_variable_get(ARGS_VAR)
  args[REQUIRED_ARGS] << key
  self.class_variable_set(ARGS_VAR, args)
end