Dynamically update user list

app/helpers/home_helper.rb

@@ -1,2 +1,23 @@
+require 'open3'
+
 module HomeHelper
+
+  def list_all_users
+    stdout, stderr, status = Open3.capture3('getent', 'passwd')
+    return [] unless status.success?
+    valid_users = stdout.split("\n").select { |user| user.start_with?(/\w/) }.map(&:split).map(&:first)
+    valid_users.map do |user|
+      user.split(':')[0]
+    end
+  end
+
+  def users_with_public_html(users)
+    users.select do |user|
+      home_dir = Dir.home(user)
+      File.exist?(File.join(home_dir, 'public_html'))
+    end
+  end
+
+  users = list_all_users
+  users_with_public_html(users)
 end