Refactor page header code

app/helpers/application_helper.rb

@@ -3,6 +3,10 @@ module ApplicationHelper
     bootstrap_classes[flash_type] || flash_type.to_s
   end
 
+  def page_header
+    content_for(:title) || ''
+  end
+
   private
 
   def bootstrap_classes

app/views/application/_navbar.html.slim

@@ -10,8 +10,7 @@
       = link_to 'Creddit', root_path, class: 'navbar-brand'
     .collapse.navbar-collapse
       ul.nav.navbar-nav
-        - if @subcreddit && @subcreddit.name
+        li= page_header
-          li= link_to @subcreddit.name, @subcreddit
       ul.nav.navbar-nav.navbar-right
         - if logged_in?
           li= link_to 'Sign Out', signout_path

app/views/comments/show.html.slim

@@ -1,3 +1,4 @@
+- content_for(:title, link_to(@subcreddit.name, @subcreddit))
 == render 'posts/post', post: @post
 .alert.alert-info.in-page
   p you are viewing a single comment's thread.

app/views/posts/show.html.slim

@@ -1,3 +1,4 @@
+- content_for(:title, link_to(@subcreddit.name, @subcreddit))
 == render 'post', post: @post
 - if @post.comments?
   .title= "all #{@post.comments_count} comments"

app/views/subcreddits/show.html.slim

@@ -1,3 +1,4 @@
+- content_for(:title) { link_to @subcreddit.name, @subcreddit }
 - if @subcreddit.closed?
   = "Board has been closed"
 - else

app/views/users/show.html.slim

@@ -1,4 +1,4 @@
-h1 #{@user.username}
+- content_for(:title, link_to(@user.username, @user))
 
 .comments.contents
   - @comments.each do |comment|

spec/helpers/application_helper_spec.rb

@@ -26,4 +26,20 @@ describe ApplicationHelper do
       end
     end
   end
+
+  describe '#page_header' do
+    context 'when title is provided' do
+      it 'should return the set title' do
+        allow(helper).to receive(:content_for).with(:title).and_return('Test')
+
+        expect(helper.page_header).to eq 'Test'
+      end
+    end
+
+    context 'when title is not provided' do
+      it 'should return blank' do
+        expect(helper.page_header).to be_blank
+      end
+    end
+  end
 end