Add deletion to masto api.

lib/pleroma/web/common_api/common_api.ex

+defmodule Pleroma.Web.CommonAPI do
+  alias Pleroma.{Repo, Activity, Object}
+  alias Pleroma.Web.ActivityPub.ActivityPub
+
+  def delete(activity_id, user) do
+    with %Activity{data: %{"object" => %{"id" => object_id}}} <- Repo.get(Activity, activity_id),
+         %Object{} = object <- Object.get_by_ap_id(object_id),
+           true <- user.ap_id == object.data["actor"],
+         {:ok, delete} <- ActivityPub.delete(object) do
+      {:ok, delete}
+    end
+  end
+end

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   alias Pleroma.Web.MastodonAPI.{StatusView, AccountView}
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.TwitterAPI.TwitterAPI
+  alias Pleroma.Web.CommonAPI
 
   def create_app(conn, params) do
     with cs <- App.register_changeset(%App{}, params) |> IO.inspect,
@@ -68,4 +69,15 @@ def post_status(%{assigns: %{user: user}} = conn, %{"status" => status} = params
       render conn, StatusView, "status.json", %{activity: activity, for: user, as: :activity}
     end
   end
+
+  def delete_status(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+    with {:ok, %Activity{}} <- CommonAPI.delete(id, user) do
+      json(conn, %{})
+    else
+      _e ->
+        conn
+        |> put_status(403)
+        |> json(%{error: "Can't delete this post"})
+    end
+  end
 end

lib/pleroma/web/router.ex

@@ -56,6 +56,7 @@ def user_fetcher(username) do
     get "/timelines/home", MastodonAPIController, :home_timeline
 
     post "/statuses", MastodonAPIController, :post_status
+    delete "/statuses/:id", MastodonAPIController, :delete_status
   end
 
   scope "/api", Pleroma.Web do

lib/pleroma/web/twitter_api/twitter_api_controller.ex

@@ -2,6 +2,7 @@ defmodule Pleroma.Web.TwitterAPI.Controller do
   use Pleroma.Web, :controller
   alias Pleroma.Web.TwitterAPI.{TwitterAPI, UserView}
   alias Pleroma.Web.TwitterAPI.Representers.ActivityRepresenter
+  alias Pleroma.Web.CommonAPI
   alias Pleroma.{Repo, Activity, User, Object}
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Ecto.Changeset
@@ -95,10 +96,7 @@ def follow(%{assigns: %{user: user}} = conn, params) do
   end
 
   def delete_post(%{assigns: %{user: user}} = conn, %{"id" => id}) do
-    with %Activity{data: %{"object" => %{"id" => object_id}}} <- Repo.get(Activity, id),
-         %Object{} = object <- Object.get_by_ap_id(object_id),
-         true <- user.ap_id == object.data["actor"],
-         {:ok, delete} <- ActivityPub.delete(object) |> IO.inspect do
+    with {:ok, delete} <- CommonAPI.delete(id, user) do
       json = ActivityRepresenter.to_json(delete, %{user: user, for: user})
       conn
       |> json_reply(200, json)

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -93,4 +93,32 @@ test "get a status", %{conn: conn} do
     assert %{"id" => id} = json_response(conn, 200)
     assert id == activity.id
   end
+
+  describe "deleting a status" do
+    test "when you created it", %{conn: conn} do
+      activity = insert(:note_activity)
+      author = User.get_by_ap_id(activity.data["actor"])
+
+      conn = conn
+      |> assign(:user, author)
+      |> delete("/api/v1/statuses/#{activity.id}")
+
+      assert %{} = json_response(conn, 200)
+
+      assert Repo.get(Activity, activity.id) == nil
+    end
+
+    test "when you didn't create it", %{conn: conn} do
+      activity = insert(:note_activity)
+      user = insert(:user)
+
+      conn = conn
+      |> assign(:user, user)
+      |> delete("/api/v1/statuses/#{activity.id}")
+
+      assert %{"error" => _} = json_response(conn, 403)
+
+      assert Repo.get(Activity, activity.id) == activity
+    end
+  end
 end