Review changes

app/models/competition_tab.rb

@@ -1,8 +1,5 @@
 # frozen_string_literal: true
 
-require 'net/http'
-require 'uri'
-
 class CompetitionTab < ApplicationRecord
   belongs_to :competition
 
@@ -37,30 +34,12 @@ def slug
     competition.tabs.where("display_order > ?", display_order).update_all("display_order = display_order - 1")
   end
 
-  private def url_exists?(url, max_redirects = 5)
-    uri = URI(url)
-    Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https') do |http|
-      request = Net::HTTP::Get.new(uri)
-      response = http.request(request)
-      if (300..399).cover?(response.code.to_i) && max_redirects > 0
-        location = response['location']
-        return url_exists?(location, max_redirects - 1)
-      else
-        return response.code == '200'
-      end
-    end
-  end
-
-  validate :verify_if_urls_are_valid, on: :update
-  private def verify_if_urls_are_valid
-    base_url = Rails.application.routes.url_helpers.competitions_url + '/'
-    content.scan(/\[(.*?)\]\((.*?)\)/) do |match|
-      hyperlink = match[1]
-      unless hyperlink.starts_with?('http') # Validation is to be done only for the relative hyperlinks.
-        url = base_url + hyperlink
-        unless url_exists?(url)
-          errors.add(:content, "URL #{url} does not exist.")
-        end
+  validate :verify_if_urls_are_full_urls, on: :update
+  private def verify_if_urls_are_full_urls
+    content.scan(/\[(.*?)\]\((.*?)\)/).any? do |match|
+      url = match[1]
+      unless url.starts_with?('http://', 'https://')
+        errors.add(:content, I18n.t('competition_tabs.not_full_url_error_message', url: url))
       end
     end
   end

config/locales/en.yml

@@ -2080,6 +2080,7 @@ en:
       tabs_introduction_text: "Here you can add and edit tabs which are shown on the competition info page."
     edit:
       edit_tab_title: "Edit %{tab_name} tab"
+    not_full_url_error_message: "You have a relative URL (%{url}) in the content. Please enter full URLs with prefix http:// or https://."
   #context: Key used for results (rankings, records, etc.)
   results:
     #context: On the rankings page