BSF_Rollback_Version_Manager::bsf_download_rollback_version()

	public function bsf_download_rollback_version() {

		if ( ! current_user_can( 'update_plugins' ) ) {
			return false;
		}

		if ( empty( $_GET['version_no'] ) || empty( $_GET['product_id'] ) || ! isset( $_GET['action'] ) ) {
			return false;
		}

		check_admin_referer( 'bsf_rollback' );

		$bsf_update_manager  = new BSF_Update_Manager();
		$version_no          = sanitize_text_field( $_GET['version_no'] );
		$product_id          = sanitize_text_field( $_GET['product_id'] );
		$product_details     = get_brainstorm_product( $product_id );
		$plugin_slug         = ! empty( $product_details['slug'] ) ? $product_details['slug'] : '';
		$plugin_name         = ! empty( $product_details['template'] ) ? $product_details['template'] : '';
		$bundled_plugin_name = ! empty( $product_details['init'] ) ? $product_details['init'] : '';
		$purchase_key        = $bsf_update_manager->get_purchse_key( $product_id );
		$product_title       = ! empty( $product_details['name'] ) ? $product_details['name'] : '';
		$plugin_name         = ! empty( $plugin_name ) ? $plugin_name : $bundled_plugin_name;

		$download_params = array(
			'version_no'   => $version_no,
			'purchase_key' => $purchase_key,
			'site_url'     => get_site_url(),
		);

		$download_url = bsf_get_api_site( false, true ) . 'download/' . $product_id . '?' . http_build_query( $download_params );

		$rollback = new BSF_Rollback_Version(
			array(
				'version'       => $version_no,
				'plugin_name'   => $plugin_name,
				'plugin_slug'   => $plugin_slug,
				'package_url'   => $download_url,
				'product_title' => $product_title,
				'product_id'    => $product_id,
			)
		);
		$rollback->run();
		// Delete product versions transient data after update.
		bsf_clear_versions_cache( $product_id );
		wp_die();
	}