Make nullable parameters explicitly nullable

classes/ActionScheduler_QueueCleaner.php

@@ -39,10 +39,10 @@ class ActionScheduler_QueueCleaner {
 	/**
 	 * ActionScheduler_QueueCleaner constructor.
 	 *
-	 * @param ActionScheduler_Store $store      The store instance.
-	 * @param int                   $batch_size The batch size.
+	 * @param ActionScheduler_Store|null $store      The store instance.
+	 * @param int                        $batch_size The batch size.
 	 */
-	public function __construct( ActionScheduler_Store $store = null, $batch_size = 20 ) {
+	public function __construct( ?ActionScheduler_Store $store = null, $batch_size = 20 ) {
 		$this->store      = $store ? $store : ActionScheduler_Store::instance();
 		$this->batch_size = $batch_size;
 	}

classes/ActionScheduler_QueueRunner.php

@@ -47,12 +47,12 @@ public static function instance() {
 	/**
 	 * ActionScheduler_QueueRunner constructor.
 	 *
-	 * @param ActionScheduler_Store                    $store Store object.
-	 * @param ActionScheduler_FatalErrorMonitor        $monitor Monitor object.
-	 * @param ActionScheduler_QueueCleaner             $cleaner Cleaner object.
-	 * @param ActionScheduler_AsyncRequest_QueueRunner $async_request Async request runner object.
+	 * @param ActionScheduler_Store|null                    $store Store object.
+	 * @param ActionScheduler_FatalErrorMonitor|null        $monitor Monitor object.
+	 * @param ActionScheduler_QueueCleaner|null             $cleaner Cleaner object.
+	 * @param ActionScheduler_AsyncRequest_QueueRunner|null $async_request Async request runner object.
 	 */
-	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null, ActionScheduler_AsyncRequest_QueueRunner $async_request = null ) {
+	public function __construct( ?ActionScheduler_Store $store = null, ?ActionScheduler_FatalErrorMonitor $monitor = null, ?ActionScheduler_QueueCleaner $cleaner = null, ?ActionScheduler_AsyncRequest_QueueRunner $async_request = null ) {
 		parent::__construct( $store, $monitor, $cleaner );
 
 		if ( is_null( $async_request ) ) {

classes/WP_CLI/ActionScheduler_WPCLI_QueueRunner.php

@@ -33,13 +33,13 @@ class ActionScheduler_WPCLI_QueueRunner extends ActionScheduler_Abstract_QueueRu
 	/**
 	 * ActionScheduler_WPCLI_QueueRunner constructor.
 	 *
-	 * @param ActionScheduler_Store             $store Store object.
-	 * @param ActionScheduler_FatalErrorMonitor $monitor Monitor object.
-	 * @param ActionScheduler_QueueCleaner      $cleaner Cleaner object.
+	 * @param ActionScheduler_Store|null             $store Store object.
+	 * @param ActionScheduler_FatalErrorMonitor|null $monitor Monitor object.
+	 * @param ActionScheduler_QueueCleaner|null      $cleaner Cleaner object.
 	 *
 	 * @throws Exception When this is not run within WP CLI.
 	 */
-	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null ) {
+	public function __construct( ?ActionScheduler_Store $store = null, ?ActionScheduler_FatalErrorMonitor $monitor = null, ?ActionScheduler_QueueCleaner $cleaner = null ) {
 		if ( ! ( defined( 'WP_CLI' ) && WP_CLI ) ) {
 			/* translators: %s php class name */
 			throw new Exception( sprintf( __( 'The %s class can only be run within WP CLI.', 'action-scheduler' ), __CLASS__ ) );

classes/abstracts/ActionScheduler_Abstract_QueueRunner.php

@@ -39,11 +39,11 @@ abstract class ActionScheduler_Abstract_QueueRunner extends ActionScheduler_Abst
 	/**
 	 * ActionScheduler_Abstract_QueueRunner constructor.
 	 *
-	 * @param ActionScheduler_Store             $store Store object.
-	 * @param ActionScheduler_FatalErrorMonitor $monitor Monitor object.
-	 * @param ActionScheduler_QueueCleaner      $cleaner Cleaner object.
+	 * @param ActionScheduler_Store|null             $store Store object.
+	 * @param ActionScheduler_FatalErrorMonitor|null $monitor Monitor object.
+	 * @param ActionScheduler_QueueCleaner|null      $cleaner Cleaner object.
 	 */
-	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null ) {
+	public function __construct( ?ActionScheduler_Store $store = null, ?ActionScheduler_FatalErrorMonitor $monitor = null, ?ActionScheduler_QueueCleaner $cleaner = null ) {
 
 		$this->created_time = microtime( true );
 

classes/abstracts/ActionScheduler_Abstract_RecurringSchedule.php

@@ -41,7 +41,7 @@ abstract class ActionScheduler_Abstract_RecurringSchedule extends ActionSchedule
 	 * @param mixed         $recurrence The data used to determine the schedule's recurrence.
 	 * @param DateTime|null $first (Optional) The date & time the first instance of this interval schedule ran. Default null, meaning this is the first instance.
 	 */
-	public function __construct( DateTime $date, $recurrence, DateTime $first = null ) {
+	public function __construct( DateTime $date, $recurrence, ?DateTime $first = null ) {
 		parent::__construct( $date );
 		$this->first_date = empty( $first ) ? $date : $first;
 		$this->recurrence = $recurrence;

classes/abstracts/ActionScheduler_Logger.php

@@ -30,13 +30,13 @@ public static function instance() {
 	/**
 	 * Create log entry.
 	 *
-	 * @param string   $action_id Action ID.
-	 * @param string   $message   Log message.
-	 * @param DateTime $date      Log date.
+	 * @param string        $action_id Action ID.
+	 * @param string        $message   Log message.
+	 * @param DateTime|null $date      Log date.
 	 *
 	 * @return string The log entry ID
 	 */
-	abstract public function log( $action_id, $message, DateTime $date = null );
+	abstract public function log( $action_id, $message, ?DateTime $date = null );
 
 	/**
 	 * Get action's log entry.
@@ -215,7 +215,7 @@ public function log_ignored_action( $action_id, $context = '' ) {
 	 * @param string         $action_id Action ID.
 	 * @param null|Exception $exception The exception which occurred when fetching the action. NULL by default for backward compatibility.
 	 */
-	public function log_failed_fetch_action( $action_id, Exception $exception = null ) {
+	public function log_failed_fetch_action( $action_id, ?Exception $exception = null ) {
 
 		if ( ! is_null( $exception ) ) {
 			/* translators: %s: exception message */

classes/abstracts/ActionScheduler_Store.php

@@ -37,7 +37,7 @@ abstract class ActionScheduler_Store extends ActionScheduler_Store_Deprecated {
 	 *
 	 * @return int The action ID
 	 */
-	abstract public function save_action( ActionScheduler_Action $action, DateTime $scheduled_date = null );
+	abstract public function save_action( ActionScheduler_Action $action, ?DateTime $scheduled_date = null );
 
 	/**
 	 * Get action.
@@ -202,14 +202,14 @@ abstract public function get_date( $action_id );
 	/**
 	 * Make a claim.
 	 *
-	 * @param int      $max_actions Maximum number of actions to claim.
-	 * @param DateTime $before_date Claim only actions schedule before the given date. Defaults to now.
-	 * @param array    $hooks       Claim only actions with a hook or hooks.
-	 * @param string   $group       Claim only actions in the given group.
+	 * @param int           $max_actions Maximum number of actions to claim.
+	 * @param DateTime|null $before_date Claim only actions schedule before the given date. Defaults to now.
+	 * @param array         $hooks       Claim only actions with a hook or hooks.
+	 * @param string        $group       Claim only actions in the given group.
 	 *
 	 * @return ActionScheduler_ActionClaim
 	 */
-	abstract public function stake_claim( $max_actions = 10, DateTime $before_date = null, $hooks = array(), $group = '' );
+	abstract public function stake_claim( $max_actions = 10, ?DateTime $before_date = null, $hooks = array(), $group = '' );
 
 	/**
 	 * Get claim count.
@@ -298,7 +298,7 @@ protected function validate_sql_comparator( $comparison_operator ) {
 	 * @param null|DateTime          $scheduled_date Action's schedule date (optional).
 	 * @return string
 	 */
-	protected function get_scheduled_date_string( ActionScheduler_Action $action, DateTime $scheduled_date = null ) {
+	protected function get_scheduled_date_string( ActionScheduler_Action $action, ?DateTime $scheduled_date = null ) {
 		$next = is_null( $scheduled_date ) ? $action->get_schedule()->get_date() : $scheduled_date;
 
 		if ( ! $next ) {
@@ -313,11 +313,11 @@ protected function get_scheduled_date_string( ActionScheduler_Action $action, Da
 	/**
 	 * Get the time MySQL formatted date/time string for an action's (next) scheduled date.
 	 *
-	 * @param ActionScheduler_Action $action Action.
-	 * @param null|DateTime          $scheduled_date Action's scheduled date (optional).
+	 * @param ActionScheduler_Action|null $action Action.
+	 * @param null|DateTime               $scheduled_date Action's scheduled date (optional).
 	 * @return string
 	 */
-	protected function get_scheduled_date_string_local( ActionScheduler_Action $action, DateTime $scheduled_date = null ) {
+	protected function get_scheduled_date_string_local( ActionScheduler_Action $action, ?DateTime $scheduled_date = null ) {
 		$next = is_null( $scheduled_date ) ? $action->get_schedule()->get_date() : $scheduled_date;
 
 		if ( ! $next ) {

classes/actions/ActionScheduler_Action.php

@@ -53,7 +53,7 @@ class ActionScheduler_Action {
 	 * @param null|ActionScheduler_Schedule $schedule Action's schedule.
 	 * @param string                        $group Action's group.
 	 */
-	public function __construct( $hook, array $args = array(), ActionScheduler_Schedule $schedule = null, $group = '' ) {
+	public function __construct( $hook, array $args = array(), ?ActionScheduler_Schedule $schedule = null, $group = '' ) {
 		$schedule = empty( $schedule ) ? new ActionScheduler_NullSchedule() : $schedule;
 		$this->set_hook( $hook );
 		$this->set_schedule( $schedule );

classes/actions/ActionScheduler_CanceledAction.php

@@ -16,7 +16,7 @@ class ActionScheduler_CanceledAction extends ActionScheduler_FinishedAction {
 	 * @param null|ActionScheduler_Schedule $schedule Action's schedule.
 	 * @param string                        $group Action's group.
 	 */
-	public function __construct( $hook, array $args = array(), ActionScheduler_Schedule $schedule = null, $group = '' ) {
+	public function __construct( $hook, array $args = array(), ?ActionScheduler_Schedule $schedule = null, $group = '' ) {
 		parent::__construct( $hook, $args, $schedule, $group );
 		if ( is_null( $schedule ) ) {
 			$this->set_schedule( new ActionScheduler_NullSchedule() );

classes/actions/ActionScheduler_NullAction.php

@@ -12,7 +12,7 @@ class ActionScheduler_NullAction extends ActionScheduler_Action {
 	 * @param mixed[]                       $args Action arguments.
 	 * @param null|ActionScheduler_Schedule $schedule Action schedule.
 	 */
-	public function __construct( $hook = '', array $args = array(), ActionScheduler_Schedule $schedule = null ) {
+	public function __construct( $hook = '', array $args = array(), ?ActionScheduler_Schedule $schedule = null ) {
 		$this->set_schedule( new ActionScheduler_NullSchedule() );
 	}
 

classes/data-stores/ActionScheduler_DBLogger.php

@@ -12,13 +12,13 @@ class ActionScheduler_DBLogger extends ActionScheduler_Logger {
 	/**
 	 * Add a record to an action log.
 	 *
-	 * @param int      $action_id Action ID.
-	 * @param string   $message Message to be saved in the log entry.
-	 * @param DateTime $date Timestamp of the log entry.
+	 * @param int           $action_id Action ID.
+	 * @param string        $message Message to be saved in the log entry.
+	 * @param DateTime|null $date Timestamp of the log entry.
 	 *
 	 * @return int     The log entry ID.
 	 */
-	public function log( $action_id, $message, DateTime $date = null ) {
+	public function log( $action_id, $message, ?DateTime $date = null ) {
 		if ( empty( $date ) ) {
 			$date = as_get_datetime_object();
 		} else {

classes/data-stores/ActionScheduler_DBStore.php

@@ -59,25 +59,25 @@ public function init() {
 	 * Save an action, checks if this is a unique action before actually saving.
 	 *
 	 * @param ActionScheduler_Action $action         Action object.
-	 * @param \DateTime              $scheduled_date Optional schedule date. Default null.
+	 * @param DateTime|null          $scheduled_date Optional schedule date. Default null.
 	 *
 	 * @return int                  Action ID.
 	 * @throws RuntimeException     Throws exception when saving the action fails.
 	 */
-	public function save_unique_action( ActionScheduler_Action $action, \DateTime $scheduled_date = null ) {
+	public function save_unique_action( ActionScheduler_Action $action, ?DateTime $scheduled_date = null ) {
 		return $this->save_action_to_db( $action, $scheduled_date, true );
 	}
 
 	/**
 	 * Save an action. Can save duplicate action as well, prefer using `save_unique_action` instead.
 	 *
 	 * @param ActionScheduler_Action $action Action object.
-	 * @param \DateTime              $scheduled_date Optional schedule date. Default null.
+	 * @param DateTime|null          $scheduled_date Optional schedule date. Default null.
 	 *
 	 * @return int Action ID.
 	 * @throws RuntimeException     Throws exception when saving the action fails.
 	 */
-	public function save_action( ActionScheduler_Action $action, \DateTime $scheduled_date = null ) {
+	public function save_action( ActionScheduler_Action $action, ?DateTime $scheduled_date = null ) {
 		return $this->save_action_to_db( $action, $scheduled_date, false );
 	}
 
@@ -91,7 +91,7 @@ public function save_action( ActionScheduler_Action $action, \DateTime $schedule
 	 * @return int Action ID.
 	 * @throws \RuntimeException     Throws exception when saving the action fails.
 	 */
-	private function save_action_to_db( ActionScheduler_Action $action, DateTime $date = null, $unique = false ) {
+	private function save_action_to_db( ActionScheduler_Action $action, ?DateTime $date = null, $unique = false ) {
 		global $wpdb;
 
 		try {
@@ -847,14 +847,14 @@ protected function get_date_gmt( $action_id ) {
 	/**
 	 * Stake a claim on actions.
 	 *
-	 * @param int       $max_actions Maximum number of action to include in claim.
-	 * @param \DateTime $before_date Jobs must be schedule before this date. Defaults to now.
-	 * @param array     $hooks Hooks to filter for.
-	 * @param string    $group Group to filter for.
+	 * @param int           $max_actions Maximum number of action to include in claim.
+	 * @param DateTime|null $before_date Jobs must be schedule before this date. Defaults to now.
+	 * @param array         $hooks Hooks to filter for.
+	 * @param string        $group Group to filter for.
 	 *
 	 * @return ActionScheduler_ActionClaim
 	 */
-	public function stake_claim( $max_actions = 10, \DateTime $before_date = null, $hooks = array(), $group = '' ) {
+	public function stake_claim( $max_actions = 10, ?DateTime $before_date = null, $hooks = array(), $group = '' ) {
 		$claim_id = $this->generate_claim_id();
 
 		$this->claim_before_date = $before_date;
@@ -914,17 +914,17 @@ public function get_claim_filter( $filter_name ) {
 	/**
 	 * Mark actions claimed.
 	 *
-	 * @param string    $claim_id Claim Id.
-	 * @param int       $limit Number of action to include in claim.
-	 * @param \DateTime $before_date Should use UTC timezone.
-	 * @param array     $hooks Hooks to filter for.
-	 * @param string    $group Group to filter for.
+	 * @param string        $claim_id Claim Id.
+	 * @param int           $limit Number of action to include in claim.
+	 * @param DateTime|null $before_date Should use UTC timezone.
+	 * @param array         $hooks Hooks to filter for.
+	 * @param string        $group Group to filter for.
 	 *
 	 * @return int The number of actions that were claimed.
 	 * @throws \InvalidArgumentException Throws InvalidArgumentException if group doesn't exist.
 	 * @throws \RuntimeException Throws RuntimeException if unable to claim action.
 	 */
-	protected function claim_actions( $claim_id, $limit, \DateTime $before_date = null, $hooks = array(), $group = '' ) {
+	protected function claim_actions( $claim_id, $limit, ?DateTime $before_date = null, $hooks = array(), $group = '' ) {
 		/**
 		 * Global.
 		 *

classes/data-stores/ActionScheduler_HybridStore.php

@@ -54,9 +54,9 @@ class ActionScheduler_HybridStore extends Store {
 	/**
 	 * ActionScheduler_HybridStore constructor.
 	 *
-	 * @param Config $config Migration config object.
+	 * @param Config|null $config Migration config object.
 	 */
-	public function __construct( Config $config = null ) {
+	public function __construct( ?Config $config = null ) {
 		$this->demarkation_id = (int) get_option( self::DEMARKATION_OPTION, 0 );
 		if ( empty( $config ) ) {
 			$config = Controller::instance()->get_migration_config_object();
@@ -240,7 +240,7 @@ public function action_counts() {
 	 *
 	 * @return ActionScheduler_ActionClaim
 	 */
-	public function stake_claim( $max_actions = 10, DateTime $before_date = null, $hooks = array(), $group = '' ) {
+	public function stake_claim( $max_actions = 10, ?DateTime $before_date = null, $hooks = array(), $group = '' ) {
 		$claim = $this->secondary_store->stake_claim( $max_actions, $before_date, $hooks, $group );
 
 		$claimed_actions = $claim->get_actions();
@@ -266,11 +266,11 @@ private function migrate( $action_ids ) {
 	 * Save an action to the primary store.
 	 *
 	 * @param ActionScheduler_Action $action Action object to be saved.
-	 * @param DateTime               $date Optional. Schedule date. Default null.
+	 * @param DateTime|null          $date Optional. Schedule date. Default null.
 	 *
 	 * @return int The action ID
 	 */
-	public function save_action( ActionScheduler_Action $action, DateTime $date = null ) {
+	public function save_action( ActionScheduler_Action $action, ?DateTime $date = null ) {
 		return $this->primary_store->save_action( $action, $date );
 	}
 

classes/data-stores/ActionScheduler_wpCommentLogger.php

@@ -10,13 +10,13 @@ class ActionScheduler_wpCommentLogger extends ActionScheduler_Logger {
 	/**
 	 * Create log entry.
 	 *
-	 * @param string   $action_id Action ID.
-	 * @param string   $message   Action log's message.
-	 * @param DateTime $date      Action log's timestamp.
+	 * @param string        $action_id Action ID.
+	 * @param string        $message   Action log's message.
+	 * @param DateTime|null $date      Action log's timestamp.
 	 *
 	 * @return string The log entry ID
 	 */
-	public function log( $action_id, $message, DateTime $date = null ) {
+	public function log( $action_id, $message, ?DateTime $date = null ) {
 		if ( empty( $date ) ) {
 			$date = as_get_datetime_object();
 		} else {