Provide way to limit commands that can be scheduled

Gruntfile.js

@@ -9,7 +9,7 @@ module.exports = function( grunt ) {
 
 		addtextdomain: {
 			options: {
-				textdomain: 'wp-cli-via-cron-control',
+				textdomain: 'wp-cli-cron-control-offload',
 			},
 			update_all_domains: {
 				options: {
@@ -31,8 +31,8 @@ module.exports = function( grunt ) {
 			target: {
 				options: {
 					domainPath: '/languages',
-					mainFile: 'wp-cli-via-cron-control.php',
-					potFilename: 'wp-cli-via-cron-control.pot',
+					mainFile: 'wp-cli-cron-control-offload.php',
+					potFilename: 'wp-cli-cron-control-offload.pot',
 					potHeaders: {
 						poedit: true,
 						'x-poedit-keywordslist': true

includes/utils.php

+<?php
+
+namespace Automattic\WP\WP_CLI_Cron_Control_Offload;
+
+/**
+ * Check if subcommand is allowed
+ *
+ * @param string $subcommand
+ * @return bool
+ */
+function is_subcommand_allowed( $subcommand ) {
+	return in_array( $subcommand, get_subcommand_whitelist(), true ) && ! in_array( $subcommand, get_subcommand_blacklist(), true );
+}
+
+/**
+ * Most commands must be whitelisted
+ *
+ * @return array
+ */
+function get_subcommand_whitelist() {
+	return array();
+}
+
+/**
+ * Certain commands should never be supported
+ *
+ * @return array
+ */
+function get_subcommand_blacklist() {
+	return array(
+		'cli',
+		'config',
+		'core',
+		'cron',
+		'db',
+		'eval',
+		'eval-file',
+		'scaffold',
+		'server',
+	);
+}

wp-cli-cron-control-offload.php

 <?php
 /**
- * Plugin Name:     WP-CLI Via Cron Control
+ * Plugin Name:     WP-CLI Cron Control Offload
  * Plugin URI:      https://automattic.com/
  * Description:     Schedule WP-CLI tasks to run via Cron Control
  * Author:          Erick Hitter, Automattic
  * Author URI:      https://vip.wordpress.com/
- * Text Domain:     wp-cli-via-cron-control
+ * Text Domain:     wp-cli-cron-control-offload
  * Domain Path:     /languages
  * Version:         0.1.0
  *
@@ -16,5 +16,6 @@ namespace Automattic\WP\WP_CLI_Cron_Control_Offload;
 
 const ACTION = 'wp_cli_cron_control_offload';
 
+require_once __DIR__ . '/includes/utils.php';
 require_once __DIR__ . '/includes/schedule.php';
 require_once __DIR__ . '/includes/run.php';