AO3-7294 Maintenance task to reset bookmark-only tags

app/jobs/enqueue_bookmarks_tags_job.rb

@@ -0,0 +1,19 @@
+class EnqueueBookmarksTagsJob < ApplicationJob
+  queue_as :low
+
+  def perform
+    base_scope = Tag.nonsynonymous
+                    .where(canonical: false)
+                    .where("NOT EXISTS (
+                      SELECT 1 FROM taggings 
+                      WHERE taggings.tagger_id = tags.id 
+                      AND taggings.taggable_type IN ('Work', 'ExternalWork')
+                    )")
+                    .limit(5000)
+                    .pluck(:id)
+
+    base_scope.each_slice(1000) do |batch_ids|
+      ResetBookmarkTagsJob.perform_later(batch_ids)
+    end
+  end
+end

app/jobs/reset_bookmark_tags_job.rb

@@ -0,0 +1,23 @@
+class ResetBookmarkTagsJob < ApplicationJob
+  queue_as :low
+
+  def perform(tag_ids)
+    base_scope = Tag.nonsynonymous
+                    .where(canonical: false)
+                    .where("NOT EXISTS (
+                      SELECT 1 FROM taggings 
+                      WHERE taggings.tagger_id = tags.id 
+                      AND taggings.taggable_type IN ('Work', 'ExternalWork')
+                    )")
+
+    base_scope.where(id: tag_ids).each do |tag|
+      has_type = tag.type.present? && tag.type != "Tag"
+      has_parents = tag.common_taggings.exists?
+
+      next unless has_type || has_parents
+
+      tag.common_taggings.destroy_all
+      tag.update(type: "Tag")
+    end
+  end
+end

config/resque_schedule.yml

@@ -122,3 +122,10 @@ disable_admin_post_comments:
   description: >-
     Disables all comments on admin (news) posts older than the
     configured window.
+
+reset_bookmark_tags_job:
+  cron: "0 0 1 */3 *"
+  class: "EnqueueBookmarksTagsJob"
+  queue: low
+  description: Reset bookmark-only tags to unsorted quarterly
+

spec/jobs/reset_bookmark_tags_job_spec.rb

@@ -0,0 +1,51 @@
+require "spec_helper"
+
+describe ResetBookmarkTagsJob do
+  describe "#perform" do
+    it "resets a non-canonical tag with no work uses" do
+      fandom = create(:fandom, canonical: true)
+
+      dirty_tag = create(:tag,
+                         name: "Dirty Tag",
+                         type: "Character",
+                         canonical: false,
+                         taggings_count_cache: 0)
+
+      create(:common_tagging, common_tag: dirty_tag, filterable: fandom)
+      ResetBookmarkTagsJob.perform_now(Tag.pluck(:id))
+
+      dirty_tag.reload
+      expect(dirty_tag.type).to eq("Tag")
+      expect(dirty_tag.common_taggings.count).to eq(0)
+    end
+
+    it "does not reset a non-canonical tag with work uses" do
+      fandom = create(:fandom, canonical: true)
+
+      work_tag = create(:character,
+                        name: "Work Tag",
+                        type: "Character",
+                        canonical: false,
+                        taggings_count_cache: 5)
+
+      create(:common_tagging, common_tag: work_tag, filterable: fandom)
+      ResetBookmarkTagsJob.perform_now(Tag.pluck(:id))
+
+      work_tag.reload
+      expect(work_tag.common_taggings.count).to eq(1)
+      expect(work_tag.type).to eq("Character")
+    end
+
+    it "does not reset a canonical tag" do
+      canonical_tag = create(:fandom,
+                             name: "Official Fandom",
+                             canonical: true)
+
+      ResetBookmarkTagsJob.perform_now(Tag.pluck(:id))
+
+      canonical_tag.reload
+      expect(canonical_tag.canonical).to be_truthy
+      expect(canonical_tag.type).to eq("Fandom")
+    end
+  end
+end