Merge branch 'develop' into refactor/discoverable_user_field

[akkoma] / lib / pleroma / uploaders / uploader.ex

diff --git a/lib/pleroma/uploaders/uploader.ex b/lib/pleroma/uploaders/uploader.ex
index 49da6e9a9afdc8ae23b6b255ae178f1e4aec003c..6249eceb1b9a51175023d6d176628db64c39aefd 100644 (file)
--- a/lib/pleroma/uploaders/uploader.ex
+++ b/lib/pleroma/uploaders/uploader.ex
@@ -1,8 +1,10 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Uploaders.Uploader do
+  import Pleroma.Web.Gettext
+
   @moduledoc """
   Defines the contract to put and get an uploaded file to any backend.
   """
@@ -10,7 +12,7 @@ defmodule Pleroma.Uploaders.Uploader do
   @doc """
   Instructs how to get the file from the backend.
 
-  Used by `Pleroma.Plugs.UploadedMedia`.
+  Used by `Pleroma.Web.Plugs.UploadedMedia`.
   """
   @type get_method :: {:static_dir, directory :: String.t()} | {:url, url :: String.t()}
   @callback get_file(file :: String.t()) :: {:ok, get_method()}
@@ -27,18 +29,54 @@ defmodule Pleroma.Uploaders.Uploader do
     This allows to correctly proxy or redirect requests to the backend, while allowing to migrate backends without breaking any URL.
   * `{url, url :: String.t}` to bypass `get_file/2` and use the `url` directly in the activity.
   * `{:error, String.t}` error information if the file failed to be saved to the backend.
-
+  * `:wait_callback` will wait for an http post request at `/api/pleroma/upload_callback/:upload_path` and call the uploader's `http_callback/3` method.
 
   """
+  @type file_spec :: {:file | :url, String.t()}
   @callback put_file(Pleroma.Upload.t()) ::
-              :ok | {:ok, {:file | :url, String.t()}} | {:error, String.t()}
+              :ok | {:ok, file_spec()} | {:error, String.t()} | :wait_callback
+
+  @callback delete_file(file :: String.t()) :: :ok | {:error, String.t()}
 
-  @spec put_file(module(), Pleroma.Upload.t()) ::
-          {:ok, {:file | :url, String.t()}} | {:error, String.t()}
+  @callback http_callback(Plug.Conn.t(), Map.t()) ::
+              {:ok, Plug.Conn.t()}
+              | {:ok, Plug.Conn.t(), file_spec()}
+              | {:error, Plug.Conn.t(), String.t()}
+  @optional_callbacks http_callback: 2
+
+  @spec put_file(module(), Pleroma.Upload.t()) :: {:ok, file_spec()} | {:error, String.t()}
   def put_file(uploader, upload) do
     case uploader.put_file(upload) do
       :ok -> {:ok, {:file, upload.path}}
-      other -> other
+      :wait_callback -> handle_callback(uploader, upload)
+      {:ok, _} = ok -> ok
+      {:error, _} = error -> error
+    end
+  end
+
+  defp handle_callback(uploader, upload) do
+    :global.register_name({__MODULE__, upload.path}, self())
+
+    receive do
+      {__MODULE__, pid, conn, params} ->
+        case uploader.http_callback(conn, params) do
+          {:ok, conn, ok} ->
+            send(pid, {__MODULE__, conn})
+            {:ok, ok}
+
+          {:error, conn, error} ->
+            send(pid, {__MODULE__, conn})
+            {:error, error}
+        end
+    after
+      callback_timeout() -> {:error, dgettext("errors", "Uploader callback timeout")}
+    end
+  end
+
+  defp callback_timeout do
+    case Mix.env() do
+      :test -> 1_000
+      _ -> 30_000
     end
   end
 end