fix bugs

app/controllers/application_controller.rb

 class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception
-  before_action :authenticate_user!
   helper_method :clear_session_candidate
 
   def clear_session_candidate

app/controllers/applies_controller.rb

 class AppliesController < ApplicationController
+  before_action :authenticate_user!
   def apply
     session[:job_id] = params[:job_id] if params[:job_id]
     if session[:candidate].present?

app/controllers/favorites_controller.rb

 class FavoritesController < ApplicationController
+  before_action :authenticate_user!
   def index
     @jobs = current_user.liked_jobs.includes(:company)
   end
 
   def user_like_job
     job = Job.find(params[:job_id])
-    flash[:notice] = 'You have favorited this job already'
-
-    unless current_user.liked?(job)
-      current_user.like_job(job)
     flash[:notice] = 'Successfully favorited...'
-    end
+    flash[:notice] = 'You have favorited this job already' unless current_user.like_job(job)
     redirect_back(fallback_location: root_path)
   end
 

app/controllers/jobs_controller.rb

 class JobsController < ApplicationController
   before_action :set_job, only: [:show]
-  skip_before_action :authenticate_user!, only: [:index, :city, :industry, :company, :show]
-
   def index
     @jobs = Job.top_list.includes(:company)
     @cities = City.top_cities.includes(:country)

app/models/user.rb

@@ -20,7 +20,9 @@ class User < ApplicationRecord
   validates_size_of :cv, maximum: 5.megabytes, message: 'size should be less than 5MB'
 
   def like_job(job)
+    return false if liked?(job)
     liked_jobs << job
+    true
   end
 
   def unlike_job(job)

app/views/jobs/show.html.erb

 <div class="row">
   <div class="container">
     <ol class="breadcrumb">
-      <li><%= link_to "TOP", root_path, class: "btn btn-primary" %></li>
+      <li><%= link_to "TOP", root_path %></li>
       <li>
         <%- @job.cities.each_with_index do |city, index| -%>
           <%= "#{index > 0 ? ',' : ''}" %>