AO3-6529 Prevent work imports from AO3 (#4981)

* AO3-6529 Prevent work imports from AO3

* AO3-6529 Shut up rubocop

* AO3-6529 Moved code to StoryParser

app/models/story_parser.rb

@@ -799,6 +799,8 @@ def download_with_timeout(location, limit = 10)
         # we do a little cleanup here in case the user hasn't included the 'http://'
         # or if they've used capital letters or an underscore in the hostname
         uri = UrlFormatter.new(location).standardized
+        raise Error, I18n.t("story_parser.on_archive") if ArchiveConfig.PERMITTED_HOSTS.include?(uri.host)
+
         response = Net::HTTP.get_response(uri)
         case response
         when Net::HTTPSuccess

config/config.yml

@@ -676,7 +676,8 @@ HIT_COUNT_ROLLOVER_HOUR: 3
 # The batch size for calculating a work's filters from its tags:
 FILTER_UPDATE_BATCH_SIZE: 100
 
-# URLs for which we should not display the proxy notice. Alphabetical by
+# URLs for which we should not display the proxy notice. URLs from these hosts
+# are allowed in Abuse reports and disallowed in Work imports. Alphabetical by
 # environment.
 PERMITTED_HOSTS: [
   # Production

config/locales/models/en.yml

@@ -260,5 +260,7 @@ en:
         closed_ticket: must not be closed.
         invalid_department: must be in your department.
         required: must exist and not be spam.
+  story_parser:
+    on_archive: URL is for a work on the Archive. Please bookmark it directly instead.
   subscriptions:
     deleted: Deleted item

features/importing/work_import_errors.feature

@@ -15,3 +15,12 @@ Feature: Import Works
     Then I should see "We couldn't successfully import that work, sorry: We couldn't download anything from http://no-content. Please make sure that the URL is correct and complete, and try again."
     When I go to my works page
     Then I should see "Drafts (0)"
+
+  Scenario: Cannot import works from the current archive
+    Given I set up importing
+      And I fill in "urls" with "https://archiveofourown.org/works/54711364"
+      And I select "English" from "Choose a language"
+    And I press "Import"
+    Then I should see "We couldn't successfully import that work, sorry: URL is for a work on the Archive. Please bookmark it directly instead."
+    When I go to my works page
+    Then I should see "Drafts (0)"