Rename UPLOADS folder with custom WP_CONTENT_DIR

For version control purpose, our client has a WordPress app with directory structure like this:

.
|_____app
|  |_____themes
|  |_____plugins
|  |_____uploads
|_____index.php
|_____WordPress
|_____wp-config.php

In wp-config.php:

define('WP_CONTENT_DIR', __DIR__ . '/app');
define('WP_CONTENT_URL', WP_HOME . '/app');

Now, she want to rename all default WordPress folders in app directory.

With plugins and themes we can do it easily by using WP_PLUGIN_DIR and register_theme_directory(). But, somehow, it’s not easy to rename uploads folder.

I have tried many modifications with UPLOADS constant, but it can’t help because custom uploads folder is always created inside WordPress directory.

Are there any ways to workaround this problem?

After digging around, I ended up with using upload_dir filter.

Here is what I tried in functions.php to change uploads to media. Hope it can help someone too 🙂

 add_filter('upload_dir', function($uploads)
 {
     $custom = [];

     foreach ($uploads as $key => $value) {
         if ( false !== strpos($value, '/app/uploads') ) {
             $custom[$key] = str_replace('/app/uploads', '/app/media', $value);
         } else {
             $custom[$key] = $value;
         }
     }

     return $custom;
 });

Many thanks to @gmazzap for the guidelines and the suggestion about upload_dir filter!