module Usable class ModExtender attr_reader :name attr_accessor :copy, :mod, :options def initialize(mod, options = {}) @mod = mod @options = options @options[:method] ||= :include if has_spec? @copy = mod.const_get(:UsableSpec).dup @name = "#{mod.name}UsableSpec" else @copy = mod.dup @name = mod.name end end def call override copy end # @note Destructive, as it changes the dup'd mod def override unwanted = options[:only] ? copy.instance_methods - Array(options[:only]) : [] unwanted.each do |method_name| copy.send :remove_method, method_name end end # @description Directly include a module whose methods you want made available in +usable_config.available_methods+ # Gives the module a name when including so that it shows up properly in the list of ancestors def use!(target) const_name = "#{mod_name}Used" override target.send :remove_const, const_name if target.const_defined? const_name, false target.const_set const_name, copy target.usable_config.modules << copy target.send options[:method], copy end # @description Sends the method to the target with the original module def use_original!(target) return unless has_spec? target.usable_config.modules << mod target.send options[:method], mod end def has_spec? mod.const_defined?(:UsableSpec) end def mod_name if name name.split('::').last else "UsableMod#{Time.now.strftime('%s')}" end end end end