Prefill original title and content from projecteuler.net

app/jobs/pull_problem_content_job.rb

@@ -0,0 +1,21 @@
+require 'open-uri'
+
+class PullProblemContentJob < ApplicationJob
+  queue_as :default
+
+  def perform(problem)
+    html = URI.open("https://projecteuler.net/minimal=#{problem.id}").read
+    html.strip!
+
+    # Linked problems
+    html.gsub!('<a href="problem=', '<a href="/problem=')
+    # Linked about pages
+    html.gsub!('<a href="about=', '<a href="/about=')
+    # Linked txt resources
+    html.gsub!('<a href="project/resources/', '<a href="https://projecteuler.net/project/resources/')
+    # Included images
+    html.gsub!('<img src="project/images/', '<img src="https://projecteuler.net/project/images/')
+
+    problem.update(original_content: html, pulled_at: Time.current())
+  end
+end