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<?php

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namespace WPForms\Tasks;

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/**

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* Class Task.

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* @since 1.5.9

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class Task {

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/**

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* This task is async (runs asap).

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* @since 1.5.9

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const TYPE_ASYNC = 'async';

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/**

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* This task is a recurring.

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* @since 1.5.9

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const TYPE_RECURRING = 'scheduled';

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/**

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* This task is run once.

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* @since 1.5.9

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const TYPE_ONCE = 'once';

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/**

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* Type of the task.

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* @since 1.5.9

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* @var string

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private $type;

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/**

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* Action that will be used as a hook.

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* @since 1.5.9

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* @var string

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private $action;

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/**

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* Task meta ID.

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* @since 1.5.9

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* @var int

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private $meta_id;

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/**

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* All the params that should be passed to the hook.

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* @since 1.5.9

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* @var array

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private $params;

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/**

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* When the first instance of the job will run.

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* Used for ONCE ane RECURRING tasks.

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* @since 1.5.9

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* @var int

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private $timestamp;

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/**

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* How long to wait between runs.

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* Used for RECURRING tasks.

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* @since 1.5.9

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* @var int

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private $interval;

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/**

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* Task meta.

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* @since 1.7.0

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* @var Meta

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private $meta;

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/**

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* Task constructor.

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* @since 1.5.9

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* @param string $action Action of the task.

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* @throws \InvalidArgumentException When action is not a string.

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* @throws \UnexpectedValueException When action is empty.

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public function __construct( $action ) {

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if ( ! is_string( $action ) ) {

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throw new \InvalidArgumentException( 'Task action should be a string.' );

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}

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$this->action = sanitize_key( $action );

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$this->meta = new Meta();

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if ( empty( $this->action ) ) {

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throw new \UnexpectedValueException( 'Task action cannot be empty.' );

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}

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}

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/**

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* Define the type of the task as async.

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* @since 1.5.9

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* @return \WPForms\Tasks\Task

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public function async() {

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$this->type = self::TYPE_ASYNC;

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return $this;

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}

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/**

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* Define the type of the task as recurring.

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* @since 1.5.9

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* @param int $timestamp When the first instance of the job will run.

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* @param int $interval How long to wait between runs.

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* @return \WPForms\Tasks\Task

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public function recurring( $timestamp, $interval ) {

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$this->type = self::TYPE_RECURRING;

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$this->timestamp = (int) $timestamp;

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$this->interval = (int) $interval;

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return $this;

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}

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/**

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* Define the type of the task as one-time.

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* @since 1.5.9

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* @param int $timestamp When the first instance of the job will run.

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* @return \WPForms\Tasks\Task

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public function once( $timestamp ) {

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$this->type = self::TYPE_ONCE;

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$this->timestamp = (int) $timestamp;

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return $this;

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}

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/**

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* Pass any number of params that should be saved to Meta table.

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* @since 1.5.9

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* @return \WPForms\Tasks\Task

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public function params() {

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$this->params = func_get_args();

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return $this;

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}

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/**

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* Register the action.

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* Should be the final call in a chain.

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* @since 1.5.9

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* @return null|string Action ID.

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public function register() {

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$action_id = null;

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// No processing if ActionScheduler is not usable.

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if ( ! wpforms()->get( 'tasks' )->is_usable() ) {

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return $action_id;

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}

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// Save data to tasks meta table.

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if ( $this->params !== null ) {

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$this->meta_id = $this->meta->add(

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[

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'action' => $this->action,

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'data' => $this->params,

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]

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);

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if ( empty( $this->meta_id ) ) {

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return $action_id;

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}

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}

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// Prevent 500 errors when Action Scheduler tables don't exist.

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try {

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switch ( $this->type ) {

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case self::TYPE_ASYNC:

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$action_id = $this->register_async();

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break;

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case self::TYPE_RECURRING:

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$action_id = $this->register_recurring();

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break;

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case self::TYPE_ONCE:

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$action_id = $this->register_once();

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break;

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}

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} catch ( \RuntimeException $exception ) {

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$action_id = null;

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}

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return $action_id;

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}

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/**

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* Register the async task.

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* @since 1.5.9

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* @return null|string Action ID.

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protected function register_async() {

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if ( ! function_exists( 'as_enqueue_async_action' ) ) {

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return null;

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}

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return as_enqueue_async_action(

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$this->action,

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[ 'tasks_meta_id' => $this->meta_id ],

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Tasks::GROUP

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);

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}

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/**

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* Register the recurring task.

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* @since 1.5.9

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* @return null|string Action ID.

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protected function register_recurring() {

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if ( ! function_exists( 'as_schedule_recurring_action' ) ) {

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return null;

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}

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return as_schedule_recurring_action(

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$this->timestamp,

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$this->interval,

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$this->action,

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[ 'tasks_meta_id' => $this->meta_id ],

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Tasks::GROUP

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);

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}

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/**

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* Register the one-time task.

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* @since 1.5.9

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* @return null|string Action ID.

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protected function register_once() {

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if ( ! function_exists( 'as_schedule_single_action' ) ) {

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return null;

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}

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return as_schedule_single_action(

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$this->timestamp,

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$this->action,

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[ 'tasks_meta_id' => $this->meta_id ],

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Tasks::GROUP

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);

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}

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/**

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* Cancel all occurrences of this task.

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* @since 1.6.1

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* @return null|bool|string Null if no matching action found,

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* false if AS library is missing,

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* true if scheduled task has no params,

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* string of the scheduled action ID if a scheduled action was found and unscheduled.

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public function cancel() {

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if ( ! function_exists( 'as_unschedule_all_actions' ) ) {

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return false;

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}

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if ( $this->params === null ) {

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as_unschedule_all_actions( $this->action );

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return true;

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}

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$this->meta_id = $this->meta->get_meta_id( $this->action, $this->params );

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if ( $this->meta_id === null ) {

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return null;

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}

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return as_unschedule_action( $this->action, [ 'tasks_meta_id' => $this->meta_id ], Tasks::GROUP );

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}

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}

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