Hook attach

[drzraf]

Provide a hook to allow developer omitting file download for whatever reason (like reusing already existing local directory).
Sample implementation of this hook:

<?php


add_filter( 'wxr_importer.process_attachment.uploaded', function( $uploaded, $remote_url, $post, $meta ) {
    $filepath = wp_upload_dir()['basedir'] . '/' . $post['upload_date'] . '/' . basename( $remote_url );
    if ( file_exists( $filepath ) && ($filesize = filesize( $filepath ))) {
        $wp_url = wp_upload_dir()['baseurl'] . '/' . $post['upload_date'] . '/' . basename( $remote_url );
        $id = attachment_url_to_postid( $wp_url );
        if ( $id ) {
            $metadata = wp_get_attachment_metadata( $id );
            $metadata['url'] = $wp_url;
			printf(
				__( 'unmanaged media "%s" already registered (id: %d, %d bytes).', 'wordpress-importer' ) . PHP_EOL,
				$post['post_title'], $id, $filesize
			);
            return $metadata;
        } else {
			printf(
				__( 'unmanaged media "%s" already exists (%d bytes).', 'wordpress-importer' ) . PHP_EOL,
				$post['post_title'], $filesize
			);

            return [ 'file' => $filepath, 'url' => $wp_url ];
        }
    }
    return $uploaded;
}, 10, 4);