Class: JsRender::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/js_render/renderer.rb

Constant Summary collapse

GLOBAL_CONTEXT = 
<<-JS
  var global = global || this;
  var self = self || this;
  var window = window || this;
JS

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(component_name, data) ⇒ Renderer

Returns a new instance of Renderer.



14
15
16
17
18
19
20
21
22
 
# File 'lib/js_render/renderer.rb', line 14

def initialize(component_name, data)
  @component_name = component_name
  unless data.is_a?(String)
    transform_keys(data)
    data = data.to_json
  end
  @json_data = data
  @uuid = SecureRandom.uuid
end

Instance Attribute Details

#component_name ⇒ Object (readonly)

Returns the value of attribute component_name.



6
7
8
 
# File 'lib/js_render/renderer.rb', line 6

def component_name
  @component_name
end

#json_data ⇒ Object (readonly)

Returns the value of attribute json_data.



6
7
8
 
# File 'lib/js_render/renderer.rb', line 6

def json_data
  @json_data
end

#uuid ⇒ Object (readonly)

Returns the value of attribute uuid.



6
7
8
 
# File 'lib/js_render/renderer.rb', line 6

def uuid
  @uuid
end

Instance Method Details

#generate_client_script ⇒ Object 



48
49
50
51
52
53
54
55
 
# File 'lib/js_render/renderer.rb', line 48

def generate_client_script
  func_name = JsRender.config.client_render_function.gsub('*', @component_name)
  <<-HTML
    <script>
      typeof #{func_name} === 'function' && #{func_name}('#{@uuid}', #{@json_data});
    </script>
  HTML
end

#generate_html ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/js_render/renderer.rb', line 31

def generate_html
  return "<span id=\"#{@uuid}\"></span>" unless JsRender.config.should_server_render

  func_name = JsRender.config.server_render_function.gsub('*', @component_name)
  server_code = <<-JS
    (function () {
      var serverStr = typeof #{func_name} === 'function' ? #{func_name}(#{@json_data}) : '';
      return '<span id="#{@uuid}">' + serverStr + '</span>';
    })()
  JS
  renderer_code = asset_finder.read_files(@component_name)
  context = ::ExecJS.compile(GLOBAL_CONTEXT + renderer_code)
  context.eval(server_code)
rescue ExecJS::RuntimeError, ExecJS::ProgramError => error
  raise Errors::ServerRenderError::new(@component_name, @json_data, error)
end

#render_component ⇒ Object 



24
25
26
27
28
29
 
# File 'lib/js_render/renderer.rb', line 24

def render_component
  server_html = generate_html
  client_script = generate_client_script
  component = (server_html + client_script)
  component.respond_to?(:html_safe) ? component.html_safe : component
end