Module: Humid

Extended by:
Humid
Includes:
ActiveSupport::Configurable
Included in:
Humid
Defined in:
lib/humid.rb,
lib/humid/version.rb,
lib/humid/log_subscriber.rb,
lib/humid/controller_runtime.rb

Defined Under Namespace

Modules: ControllerRuntime Classes: FileNotFound, LogSubscriber, RenderError

Constant Summary collapse

VERSION = 
"0.0.5".freeze
@@context = 
nil

Instance Method Summary collapse

Instance Method Details

#context ⇒ Object 



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# File 'lib/humid.rb', line 82

def context
  if @@context && Webpacker.env.development?
    handle_stale_files
  end

  @@context
end

#create_context ⇒ Object 



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# File 'lib/humid.rb', line 97

def create_context
  ctx = MiniRacer::Context.new(config.context_options)
  ctx.attach("console.log", proc { |err| logger.debug(err.to_s) })
  ctx.attach("console.info", proc { |err| logger.info(err.to_s) })
  ctx.attach("console.error", proc { |err| logger.error(err.to_s) })
  ctx.attach("console.warn", proc { |err| logger.warn(err.to_s) })

  js = ""
  js << remove_functions
  js << renderer
  ctx.eval(js)

  public_path = Webpacker.config.public_path

  webpack_source_file = Webpacker.manifest.lookup(config.server_rendering_pack)
  if webpack_source_file.nil?
    raise FileNotFound.new("Humid could not find a built pack for #{config.server_rendering_pack}")
  end

  if config.use_source_map
    webpack_source_map = Webpacker.manifest.lookup("#{config.server_rendering_pack}.map")
    map_path = public_path.join(webpack_source_map[1..-1])
    ctx.attach("readSourceMap", proc { File.read(map_path) })
  end

  source_path = public_path.join(webpack_source_file[1..-1])
  filename = File.basename(source_path.to_s)
  @@current_filename = filename
  ctx.eval(File.read(source_path), filename: filename)

  @@context = ctx
end

#dispose ⇒ Object 



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# File 'lib/humid.rb', line 90

def dispose
  if @@context
    @@context.dispose
    @@context = nil
  end
end

#handle_stale_files ⇒ Object 



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# File 'lib/humid.rb', line 66

def handle_stale_files
  if Webpacker.compiler.stale?
    Webpacker.compiler.compile
  end

  public_path = Webpacker.config.public_path
  server_rendering_pack = config.server_rendering_pack
  source_path = public_path.join(Webpacker.manifest.lookup(server_rendering_pack)[1..-1])
  filename = File.basename(source_path.to_s)

  if @@current_filename != filename
    dispose
    create_context
  end
end

#logger ⇒ Object 



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# File 'lib/humid.rb', line 53

def logger
  config.logger
end

#remove_functions ⇒ Object 



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# File 'lib/humid.rb', line 42

def remove_functions
  <<~JS
    delete this.setTimeout;
    delete this.setInterval;
    delete this.clearTimeout;
    delete this.clearInterval;
    delete this.setImmediate;
    delete this.clearImmediate;
  JS
end

#render(*args) ⇒ Object 



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# File 'lib/humid.rb', line 130

def render(*args)
  ActiveSupport::Notifications.instrument("render.humid") do
    context.call("__renderer", *args)
  rescue MiniRacer::RuntimeError => e
    message = ([e.message] + e.backtrace.filter {|x| x.starts_with? "JavaScript"}).join("\n")
    render_error = Humid::RenderError.new(message)

    if config.raise_render_errors
      raise render_error
    else
      config.logger.error(render_error.inspect)
      ""
    end
  end
end

#renderer ⇒ Object 



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# File 'lib/humid.rb', line 57

def renderer
  <<~JS
    var __renderer;
    function setHumidRenderer(fn) {
      __renderer = fn;
    }
  JS
end