From f8e0942745636f0f51e5ff57d1b40f79ee82f87b Mon Sep 17 00:00:00 2001
From: William Pitcock <nenolod@dereferenced.org>
Date: Thu, 7 Jun 2018 00:04:03 +0000
Subject: [PATCH] twitter api: add approve/deny endpoints

---
 lib/pleroma/web/router.ex                     |  2 +
 .../web/twitter_api/twitter_api_controller.ex | 44 +++++++++++++++++-
 .../twitter_api_controller_test.exs           | 46 +++++++++++++++++++
 3 files changed, 90 insertions(+), 2 deletions(-)

diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index ea134bbff..6f8b427b5 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -248,6 +248,8 @@ def user_fetcher(username) do
     post("/statuses/destroy/:id", TwitterAPI.Controller, :delete_post)
 
     get("/pleroma/friend_requests", TwitterAPI.Controller, :friend_requests)
+    post("/pleroma/friendships/approve", TwitterAPI.Controller, :approve_friend_request)
+    post("/pleroma/friendships/deny", TwitterAPI.Controller, :deny_friend_request)
 
     post("/friendships/create", TwitterAPI.Controller, :follow)
     post("/friendships/destroy", TwitterAPI.Controller, :unfollow)
diff --git a/lib/pleroma/web/twitter_api/twitter_api_controller.ex b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
index 123d20177..b29687df5 100644
--- a/lib/pleroma/web/twitter_api/twitter_api_controller.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
@@ -4,6 +4,7 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
   alias Pleroma.Web.CommonAPI
   alias Pleroma.{Repo, Activity, User, Notification}
   alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.ActivityPub.Utils
   alias Ecto.Changeset
 
   require Logger
@@ -332,14 +333,53 @@ def friends(conn, params) do
   end
 
   def friend_requests(conn, params) do
-    with {:ok, user} <- TwitterAPI.get_user(conn.assigns.user, params),
+    with {:ok, user} <- TwitterAPI.get_user(conn.assigns[:user], params),
          {:ok, friend_requests} <- User.get_follow_requests(user) do
-      render(conn, UserView, "index.json", %{users: friend_requests, for: user})
+      render(conn, UserView, "index.json", %{users: friend_requests, for: conn.assigns[:user]})
     else
       _e -> bad_request_reply(conn, "Can't get friend requests")
     end
   end
 
+  def approve_friend_request(conn, %{"user_id" => uid} = params) do
+    with followed <- conn.assigns[:user],
+         uid when is_number(uid) <- String.to_integer(uid),
+         %User{} = follower <- Repo.get(User, uid),
+         {:ok, follower} <- User.maybe_follow(follower, followed),
+         %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
+         {:ok, follow_activity} <- Utils.update_follow_state(follow_activity, "accept"),
+         {:ok, _activity} <-
+           ActivityPub.accept(%{
+             to: [follower.ap_id],
+             actor: followed.ap_id,
+             object: follow_activity.data["id"],
+             type: "Accept"
+           }) do
+      render(conn, UserView, "show.json", %{user: follower, for: followed})
+    else
+      e -> bad_request_reply(conn, "Can't approve user: #{inspect(e)}")
+    end
+  end
+
+  def deny_friend_request(conn, %{"user_id" => uid} = params) do
+    with followed <- conn.assigns[:user],
+         uid when is_number(uid) <- String.to_integer(uid),
+         %User{} = follower <- Repo.get(User, uid),
+         %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
+         {:ok, follow_activity} <- Utils.update_follow_state(follow_activity, "reject"),
+         {:ok, _activity} <-
+           ActivityPub.reject(%{
+             to: [follower.ap_id],
+             actor: followed.ap_id,
+             object: follow_activity.data["id"],
+             type: "Reject"
+           }) do
+      render(conn, UserView, "show.json", %{user: follower, for: followed})
+    else
+      e -> bad_request_reply(conn, "Can't deny user: #{inspect(e)}")
+    end
+  end
+
   def friends_ids(%{assigns: %{user: user}} = conn, _params) do
     with {:ok, friends} <- User.get_friends(user) do
       ids =
diff --git a/test/web/twitter_api/twitter_api_controller_test.exs b/test/web/twitter_api/twitter_api_controller_test.exs
index ac8ccfbc3..bd11551df 100644
--- a/test/web/twitter_api/twitter_api_controller_test.exs
+++ b/test/web/twitter_api/twitter_api_controller_test.exs
@@ -980,4 +980,50 @@ test "it lists friend requests" do
       assert other_user.id == relationship["id"]
     end
   end
+
+  describe "POST /api/pleroma/friendships/approve" do
+    test "it approves a friend request" do
+      user = insert(:user, %{info: %{"locked" => true}})
+      other_user = insert(:user)
+
+      {:ok, activity} = ActivityPub.follow(other_user, user)
+
+      user = Repo.get(User, user.id)
+      other_user = Repo.get(User, other_user.id)
+
+      assert User.following?(other_user, user) == false
+
+      conn =
+        build_conn()
+        |> assign(:user, user)
+        |> post("/api/pleroma/friendships/approve", %{"user_id" => to_string(other_user.id)})
+
+      assert relationship = json_response(conn, 200)
+      assert other_user.id == relationship["id"]
+      assert relationship["follows_you"] == true
+    end
+  end
+
+  describe "POST /api/pleroma/friendships/deny" do
+    test "it denies a friend request" do
+      user = insert(:user, %{info: %{"locked" => true}})
+      other_user = insert(:user)
+
+      {:ok, activity} = ActivityPub.follow(other_user, user)
+
+      user = Repo.get(User, user.id)
+      other_user = Repo.get(User, other_user.id)
+
+      assert User.following?(other_user, user) == false
+
+      conn =
+        build_conn()
+        |> assign(:user, user)
+        |> post("/api/pleroma/friendships/deny", %{"user_id" => to_string(other_user.id)})
+
+      assert relationship = json_response(conn, 200)
+      assert other_user.id == relationship["id"]
+      assert relationship["follows_you"] == false
+    end
+  end
 end