mastodon api: support descriptions in media api, add PUT endpoint for updating metadata about a media upload

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -1,6 +1,6 @@
 defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   use Pleroma.Web, :controller
-  alias Pleroma.{Repo, Activity, User, Notification, Stats}
+  alias Pleroma.{Repo, Object, Activity, User, Notification, Stats}
   alias Pleroma.Web
   alias Pleroma.Web.MastodonAPI.{StatusView, AccountView, MastodonView, ListView}
   alias Pleroma.Web.ActivityPub.ActivityPub
@@ -428,16 +428,43 @@ def relationships(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     render(conn, AccountView, "relationships.json", %{user: user, targets: targets})
   end
 
-  def upload(%{assigns: %{user: _}} = conn, %{"file" => file}) do
-    with {:ok, object} <- ActivityPub.upload(file) do
+  def update_media(%{assigns: %{user: _}} = conn, data) do
+    with %Object{} = object <- Repo.get(Object, data["id"]),
+         true <- is_binary(data["description"]),
+         description <- data["description"] do
+      new_data = %{object.data | "name" => description}
+
+      change = Object.change(object, %{data: new_data})
+      {:ok, media_obj} = Repo.update(change)
+
       data =
-        object.data
+        new_data
         |> Map.put("id", object.id)
 
       render(conn, StatusView, "attachment.json", %{attachment: data})
     end
   end
 
+  def upload(%{assigns: %{user: _}} = conn, %{"file" => file} = data) do
+    with {:ok, object} <- ActivityPub.upload(file) do
+      objdata =
+        if Map.has_key?(data, "description") do
+          Map.put(object.data, "name", data["description"])
+        else
+          object.data
+        end
+
+      change = Object.change(object, %{data: objdata})
+      {:ok, object} = Repo.update(change)
+
+      objdata =
+        objdata
+        |> Map.put("id", object.id)
+
+      render(conn, StatusView, "attachment.json", %{attachment: objdata})
+    end
+  end
+
   def favourited_by(conn, %{"id" => id}) do
     with %Activity{data: %{"object" => %{"likes" => likes}}} <- Repo.get(Activity, id) do
       q = from(u in User, where: u.ap_id in ^likes)

lib/pleroma/web/router.ex

@@ -127,6 +127,7 @@ def user_fetcher(username) do
     get("/notifications/:id", MastodonAPIController, :get_notification)
 
     post("/media", MastodonAPIController, :upload)
+    put("/media/:id", MastodonAPIController, :update_media)
 
     get("/lists", MastodonAPIController, :get_lists)
     get("/lists/:id", MastodonAPIController, :get_list)