Fix order of args for block/2

lib/pleroma/user/import.ex

@@ -31,7 +31,7 @@ defmodule Pleroma.User.Import do
       identifiers,
       fn identifier ->
         with {:ok, %User{} = blocked} <- User.get_or_fetch(identifier),
-             {:ok, _block} <- CommonAPI.block(blocker, blocked) do
+             {:ok, _block} <- CommonAPI.block(blocked, blocker) do
           blocked
         else
           error -> handle_error(:blocks_import, identifier, error)

lib/pleroma/web/common_api.ex

@@ -27,7 +27,7 @@ defmodule Pleroma.Web.CommonAPI do
   require Logger
 
   @spec block(User.t(), User.t()) :: {:ok, Activity.t()} | {:error, any()}
-  def block(blocker, blocked) do
+  def block(blocked, blocker) do
     with {:ok, block_data, _} <- Builder.block(blocker, blocked),
          {:ok, block, _} <- Pipeline.common_pipeline(block_data, local: true) do
       {:ok, block}

lib/pleroma/web/mastodon_api/controllers/account_controller.ex

@@ -495,7 +495,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
 
   @doc "POST /api/v1/accounts/:id/block"
   def block(%{assigns: %{user: blocker, account: blocked}} = conn, _params) do
-    with {:ok, _activity} <- CommonAPI.block(blocker, blocked) do
+    with {:ok, _activity} <- CommonAPI.block(blocked, blocker) do
       render(conn, "relationship.json", user: blocker, target: blocked)
     else
       {:error, message} -> json_response(conn, :forbidden, %{error: message})