wait for moderator with action cable

app/assets/javascripts/application.js

@@ -14,4 +14,5 @@
 //= require jquery-ui
 //= require bootstrap-sprockets
 //= require turbolinks
+//= require_self
 //= require_tree .

app/assets/javascripts/channels/moderator_joins.js

@@ -0,0 +1,27 @@
+(function() {
+
+  var initRooms = function() {
+    App.messages = App.cable.subscriptions.create({
+      channel: 'ModeratorJoinsChannel',
+      username: window.location.pathname.split('/').pop()
+    },
+    {
+      received: function(data) {
+        if (!Meeting.getInstance().getModJoined()) {
+          Meeting.getInstance().setModJoined(true);
+          if (Meeting.getInstance().getWaitingForMod()) {
+            loopJoin();
+          }
+        }
+      }
+    });
+  };
+
+  $(document).on("turbolinks:load", function() {
+    if ($("body[data-controller=landing]").get(0)) {
+      if ($("body[data-action=rooms]").get(0)) {
+        initRooms();
+      }
+    }
+  });
+}).call(this);

app/assets/javascripts/landing.js

@@ -1,21 +1,35 @@
 (function() {
+  var waitForModerator = function(url) {
+    $.get(url + "/wait", function(html) {
+      $(".center-panel-wrapper").html(html);
+    });
+    if (!Meeting.getInstance().getWaitingForMod()) {
+      Meeting.getInstance().setWaitingForMod(true);
+      if (Meeting.getInstance().getModJoined()) {
+        loopJoin();
+      }
+    }
+  };
+
   var init = function() {
 
     $('.meeting-join').click (function (event) {
       var url = $('.meeting-url').val();
       var name = $('.meeting-user-name').val();
-      $.ajax({
-        url : url + "/join?name=" + name,
-        dataType : "json",
-        type : 'GET',
-        success : function(data) {
+      Meeting.getInstance().setURL(url);
+      Meeting.getInstance().setName(name);
+      var jqxhr = Meeting.getInstance().getjoinMeetingURL();
+
+      jqxhr.done(function(data) {
+        if (data.messageKey === 'wait_for_moderator') {
+          waitForModerator(url);
+        } else {
           $(location).attr("href", data.response.join_url);
-        },
-        error : function(xhr, status, error) {
-        },
-        complete : function(xhr, status) {
         }
       });
+      jqxhr.fail(function(xhr, status, error) {
+        console.info("meeting join failed");
+      });
     });
 
     $('.meeting-url-copy').click (function (e) {

app/assets/javascripts/shared.js

@@ -0,0 +1,55 @@
+var meetingInstance = null;
+class Meeting {
+  constructor(url, name) {
+    this.url = url;
+    this.name = name;
+  }
+
+  static getInstance() {
+    if (meetingInstance) {
+      return meetingInstance;
+    }
+    var url = $('.meeting-url').val();
+    var name = $('.meeting-user-name').val();
+    meetingInstance = new Meeting(url, name);
+    return meetingInstance;
+  }
+
+  getjoinMeetingURL() {
+    return $.get(this.url + "/join?name=" + this.name, function() {
+    });
+  };
+
+  setURL(url) {
+    this.url = url;
+  }
+  setName(name) {
+    this.name = name;
+  }
+  setModJoined(modJoined) {
+    this.modJoined = modJoined;
+  }
+  getModJoined() {
+    return this.modJoined;
+  }
+  setWaitingForMod(wMod) {
+    this.waitingForMod = wMod;
+  }
+  getWaitingForMod() {
+    return this.waitingForMod;
+  }
+}
+
+var loopJoin = function() {
+  var jqxhr = Meeting.getInstance().getjoinMeetingURL();
+  jqxhr.done(function(data) {
+    if (data.messageKey === 'wait_for_moderator') {
+      setTimeout(loopJoin, 5000);
+    } else {
+      $(location).attr("href", data.response.join_url);
+    }
+  });
+  jqxhr.fail(function(xhr, status, error) {
+    console.info("meeting join failed");
+  });
+}

app/assets/stylesheets/shared.scss

@@ -27,7 +27,7 @@ html, body {
   border: 0;
 }
 
-.content-box {
+.center-panel {
   .center-block {
     float: none;
   }

app/channels/moderator_joins_channel.rb

@@ -0,0 +1,5 @@
+class ModeratorJoinsChannel < ApplicationCable::Channel
+  def subscribed
+    stream_from "moderator_#{params[:username]}_join_channel"
+  end
+end

app/controllers/bbb_controller.rb

@@ -2,9 +2,9 @@ class BbbController < ApplicationController
 
   # GET /:resource/:id/join
   def join
-    if ( !params[:id] )
+    if ( params[:id].blank? )
       render_response("missing_parameter", "meeting token was not included", :bad_request)
-    elsif ( !params[:name] )
+    elsif ( params[:name].blank? )
       render_response("missing_parameter", "user name was not included", :bad_request)
     else
       user = User.find_by username: params[:id]
@@ -25,6 +25,12 @@ class BbbController < ApplicationController
         options
       )
 
+
+      if bbb_res[:returncode] && current_user && current_user == user
+        ActionCable.server.broadcast "moderator_#{user.username}_join_channel",
+          moderator: "joined"
+      end
+
       render_response bbb_res[:messageKey], bbb_res[:message], bbb_res[:status], bbb_res[:response]
     end
   end
@@ -35,6 +41,6 @@ class BbbController < ApplicationController
     @message = message
     @status = status
     @response = response
-    render status: @status && return
+    render status: @status
   end
 end

app/controllers/landing_controller.rb

@@ -10,6 +10,10 @@ class LandingController < ApplicationController
     end
   end
 
+  def wait_for_moderator
+    render layout: false
+  end
+
   def admin?
     @user == current_user
   end
@@ -20,7 +24,7 @@ class LandingController < ApplicationController
   def render_meeting
     @meeting_id = params[:id]
     params[:action] = 'meetings'
-    render :action => 'meeting'
+    render :action => 'meetings'
   end
 
   def render_room
@@ -30,7 +34,7 @@ class LandingController < ApplicationController
       redirect_to root_path
       return
     end
-    render :action => 'room'
+    render :action => 'rooms'
   end
 
 end

app/helpers/bbb_helper.rb

@@ -29,11 +29,12 @@ module BbbHelper
       begin
         bbb_meeting_info = bbb.get_meeting_info( meeting_id, nil )
       rescue BigBlueButton::BigBlueButtonException => exc
+        # This means that is not created
+
         if options[:wait_for_moderator] && !options[:user_is_moderator]
           return wait_moderator_res
         end
 
-        # This means that is not created
         logger.info "Message for the log file #{exc.key}: #{exc.message}"
 
         # Prepare parameters for create
@@ -79,7 +80,7 @@ module BbbHelper
   def wait_moderator_res
     {
       returncode: false,
-      messageKey: "WaitModerator",
+      messageKey: "wait_for_moderator",
       message: "Waiting for moderator",
       status: :ok
     }
@@ -88,7 +89,7 @@ module BbbHelper
   def call_invalid_res
     {
       returncode: false,
-      messageKey: "BBBAPICallInvalid",
+      messageKey: "BBB_API_call_invalid",
       message: "BBB API call invalid.",
       status: :internal_server_error
     }

app/views/landing/meetings.html.erb

@@ -1,5 +1,3 @@
-
-
 <% content_for :title do %>
   <div class="title">
     Hi Everyone

app/views/landing/rooms.html.erb

@@ -21,16 +21,18 @@
 
     <%= render 'shared/title', title: page_title %>
 
-    <%= render layout: 'shared/center_panel' do %>
-      <div class="center-block col-sm-8">
-        <% if current_user == @user %>
-          <%= render 'shared/meeting_url', hidden: false %>
-        <% else %>
-          <%= render 'shared/meeting_url', hidden: true %>
-        <% end %>
-        <%= render 'shared/join_form', user: current_user %>
-      </div>
-    <% end %>
+    <div class="center-panel-wrapper">
+      <%= render layout: 'shared/center_panel' do %>
+        <div class="center-block col-sm-8">
+          <% if current_user == @user %>
+            <%= render 'shared/meeting_url', hidden: false %>
+          <% else %>
+            <%= render 'shared/meeting_url', hidden: true %>
+          <% end %>
+          <%= render 'shared/join_form', user: current_user %>
+        </div>
+      <% end %>
+    </div>
 
   </div>
 </div>

app/views/landing/wait_for_moderator.html.erb

@@ -0,0 +1,11 @@
+<% content_for :title do %>
+  <div class="title">
+    Looks like you're the first one here...
+  </div>
+  <small>
+    You will automatically join when the meeting starts
+  </small>
+<% end %>
+
+<%= render layout: 'shared/center_panel' do %>
+<% end %>

app/views/layouts/application.html.erb

@@ -3,6 +3,7 @@
   <head>
     <title>Greenlight</title>
     <%= csrf_meta_tags %>
+    <%= action_cable_meta_tag %>
 
     <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
     <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

app/views/shared/_center_panel.html.erb

@@ -1,4 +1,4 @@
-<div class="content-box">
+<div class="center-panel">
   <div class="row">
     <div class="center-block col-sm-4">
       <div class="panel panel-default">

config/environments/development.rb

@@ -31,6 +31,12 @@ Rails.application.configure do
 
   config.action_mailer.perform_caching = false
 
+  # action cable socket URI
+  config.action_cable.url = "ws://localhost/cable"
+
+  # allowed action cable origins
+  Rails.application.config.action_cable.allowed_request_origins = ['http://localhost']
+
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 

config/routes.rb

@@ -1,4 +1,7 @@
+# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 Rails.application.routes.draw do
+  mount ActionCable.server => '/cable'
+
   resources :users, only: [:edit, :update]
   get '/users/logout', to: 'sessions#destroy', as: :user_logout
 
@@ -7,9 +10,9 @@ Rails.application.routes.draw do
   # There are two resources [meetings|rooms]
   # meetings offer a landing page for NON authenticated users to create and join session in BigBlueButton
   # rooms offer a customized landing page for authenticated users to create and join session in BigBlueButton
-  get '/:resource(/:id)', to: 'landing#index', as: :resource
+  get '/:resource/:id', to: 'landing#index', as: :resource
   get '/:resource/:id/join', to: 'bbb#join', as: :bbb_join, defaults: { :format => 'json' }
+  get '/:resource/:id/wait', to: 'landing#wait_for_moderator'
 
   root to: 'landing#index', :resource => "meetings"
-  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 end