From 253da275bdc8abe372a3b4a3407596f839e5f432 Mon Sep 17 00:00:00 2001
From: href <href@random.sh>
Date: Fri, 30 Nov 2018 18:19:22 +0100
Subject: [PATCH] Pleroma.Config.delete/1

---
 lib/pleroma/config.ex | 14 ++++++++++++++
 test/config_test.exs  | 15 +++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/lib/pleroma/config.ex b/lib/pleroma/config.ex
index 15f771b6..3876ddf1 100644
--- a/lib/pleroma/config.ex
+++ b/lib/pleroma/config.ex
@@ -39,4 +39,18 @@ defmodule Pleroma.Config do
   def put(key, value) do
     Application.put_env(:pleroma, key, value)
   end
+
+  def delete([key]), do: delete(key)
+
+  def delete([parent_key | keys]) do
+    {_, parent} =
+      Application.get_env(:pleroma, parent_key)
+      |> get_and_update_in(keys, fn _ -> :pop end)
+
+    Application.put_env(:pleroma, parent_key, parent)
+  end
+
+  def delete(key) do
+    Application.delete_env(:pleroma, key)
+  end
 end
diff --git a/test/config_test.exs b/test/config_test.exs
index 0124544c..837cbb30 100644
--- a/test/config_test.exs
+++ b/test/config_test.exs
@@ -53,4 +53,19 @@ defmodule Pleroma.ConfigTest do
     assert Pleroma.Config.get([:instance, :config_test]) == true
     assert Pleroma.Config.get([:instance, :config_nested_test, :x]) == true
   end
+
+  test "delete/1 with a key" do
+    Pleroma.Config.put([:delete_me], :delete_me)
+    Pleroma.Config.delete([:delete_me])
+    assert Pleroma.Config.get([:delete_me]) == nil
+  end
+
+  test "delete/2 with a list of keys" do
+    Pleroma.Config.put([:delete_me], hello: "world", world: "Hello")
+    Pleroma.Config.delete([:delete_me, :world])
+    assert Pleroma.Config.get([:delete_me]) == [hello: "world"]
+    Pleroma.Config.put([:delete_me, :delete_me], hello: "world", world: "Hello")
+    Pleroma.Config.delete([:delete_me, :delete_me, :world])
+    assert Pleroma.Config.get([:delete_me, :delete_me]) == [hello: "world"]
+  end
 end