add delete button to the files in broadcast page

app/controllers/broadcasts_controller.rb

@@ -3,7 +3,7 @@ class BroadcastsController < ApplicationController
 
   before_action :set_project
   before_action :build_broadcast, only: [:new, :create]
-  before_action :set_broadcast, only: [:show, :destroy, :update]
+  before_action :set_broadcast, only: [:show, :destroy, :update, :destroy_file]
   before_action :set_multi_view_broadcasts, only: [:show]
   before_action :show_splash_screen, only: :index
 
@@ -39,10 +39,7 @@ class BroadcastsController < ApplicationController
     end
 
     @broadcast.update(broadcast_params)
-    @files = @broadcast.files.order("created_at DESC").paginate(page: 1)
-
-    pagination_content = ApplicationController.render html: helpers.will_paginate(@files, params: { active_tab: params[:active_tab], page: params[:page], active_files_tab: params[:active_files_tab] })
-    BroadcastsChannel.broadcast_file_upload_updates(@broadcast, @files, pagination_content)
+    update_files_section
   end
 
   def destroy
@@ -53,8 +50,23 @@ class BroadcastsController < ApplicationController
     end
   end
 
+  def destroy_file
+    authorize Broadcast
+    file = ActiveStorage::Attachment.find(params[:file_id])
+    file.purge
+
+    update_files_section
+  end
+
   private
 
+  def update_files_section
+    @files = @broadcast.files.order("created_at DESC").paginate(page: 1)
+
+    pagination_content = ApplicationController.render html: helpers.will_paginate(@files, params: { active_tab: params[:active_tab], page: params[:page], active_files_tab: params[:active_files_tab] })
+    BroadcastsChannel.broadcast_file_upload_updates(@broadcast, @files, pagination_content)
+  end
+
   def show_splash_screen
     render :splash if broadcasts.count.zero?
   end