refractor code into different files

app/helpers/paths_helper.rb

@@ -0,0 +1,42 @@
+module PathsHelper
+  ##
+  # Includes functions related to links or redirects
+  ##
+  def link_if_alive(version, link_text, link_url)
+    version.item ? link_to(link_text, link_url) : link_text
+  end
+
+  def link_to_user(user_id)
+    user = User.find_by(id: user_id)
+    if user
+      link_to user.name, admin_user_path(id: user_id)
+    else
+      'Someone (probably via the console)'
+    end
+  end
+
+  def sign_in_path
+    if ENV['OSEM_ICHAIN_ENABLED'] == 'true'
+      new_user_ichain_session_path
+    else
+      new_user_session_path
+    end
+  end
+
+  def active_nav_li(link)
+    if current_page?(link)
+      return 'active'
+    else
+      return ''
+    end
+  end
+
+  # Same as redirect_to(:back) if there is a valid HTTP referer, otherwise redirect_to()
+  def redirect_back_or_to(options = {}, response_status = {})
+    if request.env['HTTP_REFERER']
+      redirect_to :back
+    else
+      redirect_to options, response_status
+    end
+  end
+end