From 8f1276b0137b8612ca7d1209ff6260ed5def8224 Mon Sep 17 00:00:00 2001
From: evazion <noizave@gmail.com>
Date: Sun, 16 Aug 2020 16:56:30 -0500
Subject: [PATCH] appeals: crosspost appeals to deletion appeal thread.

Crosspost pending appeals to the deletion appeal thread. We do this once
per hour so we can batch together multiple appeals into one post.
---
 app/logical/danbooru_maintenance.rb      |  1 +
 app/logical/post_appeal_forum_updater.rb | 26 ++++++++++++++++++++++
 test/unit/danbooru_maintenance_test.rb   | 28 ++++++++++++++++++++++++
 3 files changed, 55 insertions(+)
 create mode 100644 app/logical/post_appeal_forum_updater.rb

diff --git a/app/logical/danbooru_maintenance.rb b/app/logical/danbooru_maintenance.rb
index 0d66ed948..c990dcfae 100644
--- a/app/logical/danbooru_maintenance.rb
+++ b/app/logical/danbooru_maintenance.rb
@@ -4,6 +4,7 @@ module DanbooruMaintenance
   def hourly
     safely { Upload.prune! }
     safely { PostPruner.prune! }
+    safely { PostAppealForumUpdater.update_forum! }
     safely { regenerate_post_counts! }
   end
 
diff --git a/app/logical/post_appeal_forum_updater.rb b/app/logical/post_appeal_forum_updater.rb
new file mode 100644
index 000000000..cbb3881c5
--- /dev/null
+++ b/app/logical/post_appeal_forum_updater.rb
@@ -0,0 +1,26 @@
+module PostAppealForumUpdater
+  APPEAL_TOPIC_TITLE = "Deletion appeal thread"
+
+  def self.update_forum!
+    return if pending_appeals.empty?
+
+    CurrentUser.scoped(User.system) do
+      topic = ForumTopic.order(:id).create_with(creator: User.system).find_or_create_by!(title: APPEAL_TOPIC_TITLE)
+      ForumPost.create!(creator: User.system, topic: topic, body: forum_post_body)
+    end
+  end
+
+  def self.pending_appeals
+    PostAppeal.pending.where(created_at: (1.hour.ago..Time.zone.now)).order(post_id: :asc)
+  end
+
+  def self.forum_post_body
+    pending_appeals.map do |appeal|
+      if appeal.reason.present?
+        "post ##{appeal.post_id}: #{appeal.reason}"
+      else
+        "post ##{appeal.post_id}"
+      end
+    end.join("\n")
+  end
+end
diff --git a/test/unit/danbooru_maintenance_test.rb b/test/unit/danbooru_maintenance_test.rb
index c6f73b924..b7f24eb27 100644
--- a/test/unit/danbooru_maintenance_test.rb
+++ b/test/unit/danbooru_maintenance_test.rb
@@ -38,4 +38,32 @@ class DanbooruMaintenanceTest < ActiveSupport::TestCase
       end
     end
   end
+
+  context "PostAppealForumUpdater" do
+    should "work when there are no pending appeals" do
+      assert_nothing_raised do
+        PostAppealForumUpdater.update_forum!
+      end
+    end
+
+    should "post pending appeals to the deletion appeal thread" do
+      @topic = as(create(:user)) { create(:forum_topic, title: PostAppealForumUpdater::APPEAL_TOPIC_TITLE) }
+      @appeal1 = create(:post_appeal, reason: "test")
+      @appeal2 = create(:post_appeal, reason: "")
+      @appeal3 = create(:post_appeal, created_at: 2.hours.ago)
+
+      PostAppealForumUpdater.update_forum!
+
+      assert_equal(@topic.id, ForumPost.last.topic_id)
+      assert_equal("post ##{@appeal1.post_id}: #{@appeal1.reason}\npost ##{@appeal2.post_id}", ForumPost.last.body)
+    end
+
+    should "create the deletion appeal thread if it doesn't already exist" do
+      @appeal = create(:post_appeal, reason: "")
+      PostAppealForumUpdater.update_forum!
+
+      assert_equal(PostAppealForumUpdater::APPEAL_TOPIC_TITLE, ForumPost.last.topic.title)
+      assert_equal("post ##{@appeal.post_id}", ForumPost.last.body)
+    end
+  end
 end