FIX: Perform a toxicity check after a post gets edited.

We need to check for toxicity after editing to prevent users from posting toxic content after the original post gets created.

plugin.rb

@@ -24,6 +24,12 @@
     end
   end
 
+  on(:post_edited) do |post|
+    if SiteSetting.perspective_flag_post_min_toxicity_enable? && DiscoursePerspective.should_check_post?(post)
+      Jobs.enqueue(:flag_toxic_post, post_id: post.id)
+    end
+  end
+
   register_post_custom_field_type(DiscoursePerspective.post_score_field_name, :float)
 
   require_dependency "application_controller"

spec/plugin_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe 'scanning posts using the porspective API' do
+
+  before do
+    SiteSetting.perspective_enabled = true
+  end
+
+  describe 'when a post is edited' do
+    let(:post) { Fabricate(:post) }
+
+    it 'queues the post for a toxicity check' do
+      expect {
+        PostRevisor.new(post).revise!(
+          post.user,
+          { raw: 'updated body' }
+        )
+      }.to change(Jobs::FlagToxicPost.jobs, :size).by(1)
+    end
+  end
+end