FEATURE: allow disabling self-deletions of posts (#11668)

https://meta.discourse.org/t/restoring-deleted-messages/173647/6?u=techapj

spec/requests/posts_controller_spec.rb

@@ -203,6 +203,15 @@ describe PostsController do
         expect(response).to be_forbidden
       end
 
+      it "raises an error when the self deletions are disabled" do
+        SiteSetting.max_post_deletions_per_day = 0
+        post = Fabricate(:post, user: user, topic: topic, post_number: 3)
+        sign_in(user)
+
+        delete "/posts/#{post.id}.json"
+        expect(response).to be_forbidden
+      end
+
       it "uses a PostDestroyer" do
         post = Fabricate(:post, topic_id: topic.id, post_number: 3)
         sign_in(moderator)
@@ -306,6 +315,15 @@ describe PostsController do
         expect(response).to be_forbidden
       end
 
+      it "raises an error when self deletion/recovery is disabled" do
+        SiteSetting.max_post_deletions_per_day = 0
+        post = Fabricate(:post, user: user, topic: topic, post_number: 3)
+        sign_in(user)
+
+        put "/posts/#{post.id}/recover.json"
+        expect(response).to be_forbidden
+      end
+
       it "recovers a post correctly" do
         topic_id = create_post.topic_id
         post = create_post(topic_id: topic_id)