add specs and use i18n

app/controllers/broadcasts_controller.rb

@@ -1,5 +1,4 @@
 class BroadcastsController < ApplicationController
-  require 'microsoft_graph'
   layout "project"
 
   before_action :set_project

app/controllers/conference_meetings_controller.rb

@@ -1,4 +1,6 @@
 class ConferenceMeetingsController < ApplicationController
+  require 'microsoft_graph'
+
   def show
     authorize broadcast = Broadcast.find(params[:broadcast_id])
     case broadcast.conference_option
@@ -18,6 +20,7 @@ class ConferenceMeetingsController < ApplicationController
           subject = "#{broadcast.name} Online Meeting"
           teams_meeting = graph_api.create_teams_meeting(subject)
           join_url = teams_meeting['joinUrl']
+
           if join_url.present?
             broadcast.conference_join_url = join_url
             broadcast.save
@@ -26,17 +29,17 @@ class ConferenceMeetingsController < ApplicationController
           end
         rescue ActionController::InvalidAuthenticityToken => e
           Rails.logger.error(e.message)
-          redirect_to project_broadcast_url(broadcast.project, broadcast), alert: 'You are not authenticated via Microsoft, please authenticate and try again'
+          redirect_to project_broadcast_url(broadcast.project, broadcast), alert: t('.alerts.not_authenticated')
           return
         rescue StandardError => e
           Rails.logger.error(e.message)
-          redirect_to project_broadcast_url(broadcast.project, broadcast), alert: 'Failed to join conference'
+          redirect_to project_broadcast_url(broadcast.project, broadcast), alert: t('.alerts.failed_to_join')
           return
         end
       end
       redirect_to broadcast.conference_join_url
     else
-      redirect_to project_broadcast_url(broadcast.project, broadcast), alert: 'Unknown conference option'
+      redirect_to project_broadcast_url(broadcast.project, broadcast), alert: t('.alerts.unknown_conference_option')
     end
   end
 end