ruby-hyperloop.io/source/tutorials/chat_app_source.html at old_source · ruby-hyperloop/ruby-hyperloop.io · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Hello React</title>
    <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.5/marked.min.js"></script>
    <script src="https://rawgit.com/reactrb/reactrb-express/master/reactrb-express.js"></script>
    <script src="http://ruby-hyperloop.io/javascripts/test_chat_service.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>

    <style type="text/css">
      /* most styles will come from bootstrap, but we will be adding a
        few extra styles here */
    </style>

    <script type="text/ruby">
      class App < React::Component::Base

        before_mount do
         @chat_service = ChatService.new do | messages |
           state.messages! ((state.messages || []) + messages)
           puts "state messages updated.  state.messages: #{state.messages}"
         end
        end

        def render
          div do
            Nav login: method(:login).to_proc
            if online?
              Messages messages: state.messages
              InputBox chat_service: @chat_service
            end
          end
        end

        def login(user_name)
          @chat_service.login(user_name)
        end

        def online?
          state.messages
        end
      end

      class Nav < React::Component::Base
        param :login, type: Proc

        before_mount do
          state.current_user_name! nil
          state.user_name_input! ""
        end

        def render
          div.navbar.navbar_inverse.navbar_fixed_top do
            div.container do
              div.collapse.navbar_collapse(id: "navbar") do
                form.navbar_form.navbar_left(role: :search) do
                  div.form_group do
                    input.form_control(type: :text, value: state.user_name_input, placeholder: "Enter Your Handle"
                    ).on(:change) do |e|
                      state.user_name_input! e.target.value
                    end
                    button.btn.btn_default(type: :button) { "login!" }.on(:click) do
                      login!
                    end if valid_new_input?
                  end
                end
              end
            end
          end
        end

        def valid_new_input?
          state.user_name_input.present? && state.user_name_input != state.current_user_name
        end

        def login!
           state.current_user_name! state.user_name_input
           params.login(state.user_name_input)
        end
      end

      class Messages < React::Component::Base
        param :messages, type: [Hash]

        def render
          div.container do # add the bootstrap .container class here.
            params.messages.each do |message|
              Message message: message
            end
          end
        end
      end

      class Message < React::Component::Base
        param :message, type: Hash

        after_mount :scroll_to_bottom
        after_update :scroll_to_bottom

        def render
         div.row.alternating.message do
           div.col_sm_2 { params.message[:from] }
           FormattedDiv class: "col-sm-8", markdown: params.message[:message]
           div.col_sm_2 { Time.at(params.message[:time]).to_s }
         end
        end

        def scroll_to_bottom
          Element['html, body'].animate({scrollTop: Element[Document].height}, :slow)
        end
      end

      class InputBox < React::Component::Base
        param :chat_service, type: ChatService

        before_mount { state.composition! "" }

        def render
          div.row.form_group.input_box.navbar.navbar_inverse.navbar_fixed_bottom do
            div.col_sm_1.white {"Say: "}
            textarea.col_sm_5(rows: rows,
                value: state.composition,
                placeholder: "Ctrl-Enter to post"
            ).on(:change) do |e|
              state.composition! e.target.value
            end.on(:key_down) do |e|
              send_message if is_send_key?(e)
            end
            FormattedDiv class: "col-sm-5 white", markdown: state.composition
          end
        end

        def rows
          [state.composition.count("\n") + 1,20].min
        end

        def is_send_key?(e)
          #(e.char_code == 13 || e.key_code == 13)
          (e.char_code == 13 || e.key_code == 13) && (e.meta_key || e.ctrl_key)
        end

        def send_message
          params.chat_service.send(
            message: state.composition!(""),
            time: Time.now.to_i,
            from: params.chat_service.id
          )
        end
      end

      class FormattedDiv < React::Component::Base
        param :markdown, type: String
        collect_other_params_as :attributes

        def render
          div(params.attributes) do # send whatever class is specified on to the outer div
            div({dangerously_set_inner_HTML: { __html: `marked(#{params.markdown}, {sanitize: true })`}})
          end
        end
      end
      </script>

  </head>
  <body>
    <!-- Tell inline reactive ruby to mount App here -->
    <div data-reactrb-mount="App"></div>
  </body>
</html>