Add media upload endpoint.

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -199,6 +199,15 @@ def relationships(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     render conn, AccountView, "relationships.json", %{user: user, targets: targets}
   end
 
+  def upload(%{assigns: %{user: user}} = conn, %{"file" => file}) do
+    with {:ok, object} <- ActivityPub.upload(file) do
+      data = object.data
+      |> Map.put("id", object.id)
+
+      render conn, StatusView, "attachment.json", %{attachment: data}
+    end
+  end
+
   def empty_array(conn, _) do
     Logger.debug("Unimplemented, returning an empty array")
     json(conn, [])

lib/pleroma/web/router.ex

@@ -55,6 +55,8 @@ def user_fetcher(username) do
     post "/statuses/:id/unfavourite", MastodonAPIController, :unfav_status
 
     get "/notifications", MastodonAPIController, :notifications
+
+    post "/media", MastodonAPIController, :upload
   end
 
   scope "/api/v1", Pleroma.Web.MastodonAPI do

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -213,4 +213,18 @@ test "account fetching", %{conn: conn} do
 
     assert %{"error" => "Can't find user"} = json_response(conn, 404)
   end
+
+  test "media upload", %{conn: conn} do
+    file = %Plug.Upload{content_type: "image/jpg", path: Path.absname("test/fixtures/image.jpg"), filename: "an_image.jpg"}
+
+    user = insert(:user)
+
+    conn = conn
+    |> assign(:user, user)
+    |> post("/api/v1/media", %{"file" => file})
+
+    assert media = json_response(conn, 200)
+
+    assert media["type"] == "image"
+  end
 end

test/web/mastodon_api/status_view_test.exs

@@ -76,5 +76,9 @@ test "attachments" do
     }
 
     assert expected == StatusView.render("attachment.json", %{attachment: object})
+
+    # If theres a "id", use that instead of the generated one
+    object = Map.put(object, "id", 2)
+    assert %{id: 2} = StatusView.render("attachment.json", %{attachment: object})
   end
 end