Class: RubyAwaitNodejs::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-await-nodejs/context.rb

Instance Method Summary collapse

Constructor Details

#initialize(runtime, src = "", options = {}) ⇒ Context

runtime is an instance of RubyAwaitNodejs src is the js code to be eval()‘d in the nodejs context



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# File 'lib/ruby-await-nodejs/context.rb', line 11

def initialize(runtime, src = "", options = {})
  @runtime = runtime
  @execution_timeout = options[:execution_timeout] || 60 # seconds

  # compile context source, in most cases
  # this is something like the CoffeeScript compiler
  # or the SASS compiler
  eval(src)
end

Instance Method Details

#call(identifier, *args) ⇒ Object 



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# File 'lib/ruby-await-nodejs/context.rb', line 53

def call(identifier, *args)
  eval "#{identifier}.apply(this, #{::JSON.generate(args)})"
end

#eval(src) ⇒ Object 



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# File 'lib/ruby-await-nodejs/context.rb', line 21

def eval(src)
  if /\S/ =~ src #IMPORTANT! /\S/ =~ "()" => 0
    exec(src)
  end
end

#exec(src) ⇒ Object 



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# File 'lib/ruby-await-nodejs/context.rb', line 31

def exec(src)
  return "" unless src.length > 0

  src = src.encode('UTF-8', :undef => :replace, :replace => '')
  src = compile_source(src)

  # src is either an empty object
  # OR a valid JSON string in the form
  #   ['ok', 'result-of-coffeescript-or-sass-compiler']
  # OR if an error occured
  #   ['err', 'some sort of error to be presented to the developer as a sprockets error']
  #
  status, value = src.empty? ? [] : ::JSON.parse(src, create_additions: false)
  if status == "ok"
    value
  elsif value =~ /SyntaxError:/
    raise RuntimeError, value
  else
    raise ProgramError, value
  end
end

#load(path) ⇒ Object 



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# File 'lib/ruby-await-nodejs/context.rb', line 27

def load(path)
  exec("require(#{path.to_json})")
end