Module: Roda::RodaPlugins::Component::InstanceMethods

Defined in:
lib/roda/plugins/component.rb

Instance Method Summary collapse

Instance Method Details

#component(name, options = {}, &block) ⇒ Object Also known as: comp, roda_component 



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# File 'lib/roda/plugins/component.rb', line 101

def component name, options = {}, &block
  comp = load_component name

  action  = options.delete(:call)    || :display
  trigger = options.delete(:trigger) || false

  # call action
  # TODO: make sure the single method parameter isn't a block
  if trigger
    comp_response = comp.trigger trigger, options
  else
    # We want to make sure it's not a method that already exists in ruba
    # otherwise that would give us a false positive.
    if comp.respond_to?(action) && !"#{comp.method(action)}"[/\(Kernel\)/]
      if comp.method(action).parameters.length > 0
        comp_response = comp.send(action, options, &block)
      else
        comp_response = comp.send(action, &block)
      end
    else
      fail "##{action} doesn't exist for #{comp.class}"
    end
  end

  load_component_js comp, action

  if comp_response.is_a? Roda::Component::DOM
    comp_response = comp_response.to_xml
  end

  if comp_response.is_a?(String) && js = options.delete(:js)
    comp_response << component_js
  end

  comp_response
end

#component_js ⇒ Object 



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# File 'lib/roda/plugins/component.rb', line 140

def component_js
  loaded_component_js.join('\n').to_s
end

#component_opts ⇒ Object 



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# File 'lib/roda/plugins/component.rb', line 57

def component_opts
  @_component_opts || self.class.component_opts.dup
end

#load_component(name) ⇒ Object 



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# File 'lib/roda/plugins/component.rb', line 65

def load_component name
  Object.const_get(
    component_opts[:class_name][name.to_s]
  ).new self
end

#load_component_js(comp, action = :display) ⇒ Object 



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# File 'lib/roda/plugins/component.rb', line 71

def load_component_js comp, action = :display
  # grab a copy of the cache
  cache = comp.class.cache.dup
  # remove html and dom cache as we don't need that for the client
  cache.delete :html
  cache.delete :dom
  cache.delete :cache

  cache     = Base64.encode64 cache.to_json
  options   = Base64.encode64 options.to_json
  comp_name = comp.class._name

  js = <<-EOF
    unless $faye
      $faye = Roda::Component::Faye.new('/faye')
    end

    unless $component_opts[:comp][:"#{comp_name}"]
      Document.ready? do
        c = $component_opts[:comp][:"#{comp_name}"] = #{comp.class}.new
        c.instance_variable_set(:@_cache, JSON.parse(Base64.decode64('#{cache}')))
        c.#{action}(JSON.parse(Base64.decode64('#{options}')))
        c.events.trigger_jquery_events
      end
    end
  EOF

  loaded_component_js << ("<script>" + Opal.compile(js) + "</script>")
end

#loaded_component_js ⇒ Object 



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# File 'lib/roda/plugins/component.rb', line 61

def loaded_component_js
  request.env['loaded_component_js'] ||= []
end