bp_document_get_edit_activity_data( $activity )

function bp_document_get_edit_activity_data( $activity ) {

	if ( ! empty( $activity['id'] ) ) {

		// Fetch document ids of activity.
		$document_ids = bp_activity_get_meta( $activity['id'], 'bp_document_ids', true );

		if ( ! empty( $document_ids ) ) {
			$activity['document'] = array();

			$document_ids = explode( ',', $document_ids );

			foreach( $document_ids as $document_id ) {
				$document = new BP_Document( $document_id );

				$activity['document'][] = array(
						'id'            => $document_id,
						'doc_id'        => $document->attachment_id,
						'name'          => $document->title,
						'group_id'      => $document->group_id,
						'folder_id'      => $document->folder_id,
						'activity_id'   => $document->activity_id,
						'type'          => 'document',
						'url'           => wp_get_attachment_url( $document->attachment_id ),
						'size'           => filesize( get_attached_file( ( $document->attachment_id ) ) ),
						'saved'         => true,
						'menu_order'    => $document->menu_order,
				);
			}
		}
	}

	return $activity;
}