Module: Redstruct::Utils::Scriptable::ClassMethods

Defined in:
lib/redstruct/utils/scriptable.rb

Overview

Class methods added when the module is included at the class level (i.e. extend)

Instance Method Summary collapse

Instance Method Details

#defscript(id, script) ⇒ Object

Creates a method with the given id, which will create a constant and a method in the class. This allows you to use defscript as a macro for your lua scripts, which gets translated to Ruby code at compile time.

Parameters:

  • id (String) —

    the script ID

  • script (String) —

    the lua script source

Raises:

  • (ArgumentError) 


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# File 'lib/redstruct/utils/scriptable.rb', line 21

def defscript(id, script)
  raise ArgumentError, 'no script given' unless script && !script.empty?

  script = script.strip
  constant = "SCRIPT_#{id.upcase}"

  if const_defined?(constant)
    Redstruct.logger.warn("cowardly aborting defscript #{id}; constant with name #{constant} already exists!")
    return
  end

  if method_defined?(id)
    Redstruct.logger.warn("cowardly aborting defscript #{id}; method with name #{id} already exists!")
    return
  end

  class_eval <<~METHOD, __FILE__, __LINE__ + 1
    #{constant} = { script: %(#{script}).freeze, sha1: Digest::SHA1.hexdigest(%(#{script})).freeze }.freeze
      def #{id}(keys: [], argv: [])
        return @factory.script(#{constant}[:script], sha1: #{constant}[:sha1]).eval(keys: keys, argv: argv)
      end
  METHOD
end