From 422d0f324fa18743129ce81139319ead7cb579ce Mon Sep 17 00:00:00 2001
From: Roger Braun <roger@rogerbraun.net>
Date: Sun, 17 Sep 2017 13:09:49 +0200
Subject: [PATCH] MastodonAPI: Add user favorites endpoint.

---
 lib/pleroma/web/activity_pub/activity_pub.ex            |  7 +++++++
 lib/pleroma/web/mastodon_api/mastodon_api_controller.ex | 12 ++++++++++++
 lib/pleroma/web/router.ex                               |  2 ++
 test/web/mastodon_api/mastodon_api_controller_test.exs  | 17 +++++++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index c4f7f432c..0cfd22d7b 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -147,6 +147,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
   defp restrict_type(query, _), do: query
 
+  defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
+    from activity in query,
+      where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
+  end
+  defp restrict_favorited_by(query, _), do: query
+
   def fetch_activities(recipients, opts \\ %{}) do
     base_query = from activity in Activity,
       limit: 20,
@@ -160,6 +166,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_max(opts)
     |> restrict_actor(opts)
     |> restrict_type(opts)
+    |> restrict_favorited_by(opts)
     |> Repo.all
     |> Enum.reverse
   end
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index c231ff7f8..dd1044024 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -312,6 +312,18 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     json(conn, res)
   end
 
+  def favourites(%{assigns: %{user: user}} = conn, params) do
+    params = conn
+    |> Map.put("type", "Create")
+    |> Map.put("favorited_by", user.ap_id)
+
+    activities = ActivityPub.fetch_activities([], params)
+    |> Enum.reverse
+
+    conn
+    |> render(StatusView, "index.json", %{activities: activities, for: user, as: :activity})
+  end
+
   def relationship_noop(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     Logger.debug("Unimplemented, returning unmodified relationship")
     with %User{} = target <- Repo.get(User, id) do
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 38ad3ebcb..6abf234c6 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -58,6 +58,8 @@ defmodule Pleroma.Web.Router do
 
     get "/timelines/home", MastodonAPIController, :home_timeline
 
+    get "/favourites", MastodonAPIController, :favourites
+
     post "/statuses", MastodonAPIController, :post_status
     delete "/statuses/:id", MastodonAPIController, :delete_status
 
diff --git a/test/web/mastodon_api/mastodon_api_controller_test.exs b/test/web/mastodon_api/mastodon_api_controller_test.exs
index 4261ac6b1..56888140d 100644
--- a/test/web/mastodon_api/mastodon_api_controller_test.exs
+++ b/test/web/mastodon_api/mastodon_api_controller_test.exs
@@ -341,4 +341,21 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
     [account] = results["accounts"]
     assert account["acct"] == "shp@social.heldscal.la"
   end
+
+  test "returns the favorites of a user", %{conn: conn} do
+    user = insert(:user)
+    other_user = insert(:user)
+
+    {:ok, _} = CommonAPI.post(other_user, %{"status" => "bla"})
+    {:ok, activity} = CommonAPI.post(other_user, %{"status" => "traps are happy"})
+
+    {:ok, _, _} = CommonAPI.favorite(activity.id, user)
+
+    conn = conn
+    |> assign(:user, user)
+    |> get("/api/v1/favourites")
+
+    assert [status] = json_response(conn, 200)
+    assert status["id"] == activity.id
+  end
 end