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<?php |
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namespace Wordlift\Dataset\Background; |
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use Wordlift\Dataset\Sync_Object_Adapter_Factory; |
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use Wordlift\Dataset\Sync_Service; |
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/** |
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* Class Sync_Background_Process |
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* |
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* The background process has the following states: |
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* - STOPPING |
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* - STOPPED |
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* - STARTING |
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* - STARTED |
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* |
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* @package Wordlift\Dataset\Background |
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*/ |
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class Sync_Background_Process extends \Wordlift_Plugin_WP_Background_Process { |
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const STATE_STARTED = 'started'; |
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const STATE_STOPPED = 'stopped'; |
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protected $action = 'wl_dataset__sync'; |
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/** |
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* @var Sync_Service |
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*/ |
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private $sync_service; |
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/** |
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* @var Sync_Object_Adapter_Factory |
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*/ |
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private $sync_object_adapter_factory; |
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/** |
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* @var \Wordlift_Log_Service |
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*/ |
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private $log; |
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/** |
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* @var Sync_Background_Process_State |
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*/ |
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private $state; |
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/** |
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* Sync_Background_Process constructor. |
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* |
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* @param Sync_Service $sync_service A {@link Sync_Service} instance providing the supporting functions to this background process. |
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* @param Sync_Object_Adapter_Factory $sync_object_adapter_factory |
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*/ |
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public function __construct( $sync_service, $sync_object_adapter_factory ) { |
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parent::__construct(); |
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$this->log = \Wordlift_Log_Service::get_logger( get_class() ); |
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$this->sync_service = $sync_service; |
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$this->sync_object_adapter_factory = $sync_object_adapter_factory; |
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// Set the current state. |
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if ( self::STATE_STARTED === $this->get_state() ) { |
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$this->state = new Sync_Background_Process_Started_State( $this, $this->sync_service, $this->sync_object_adapter_factory ); |
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} else { |
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$this->state = new Sync_Background_Process_Stopped_State( $this ); |
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} |
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} |
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/** |
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* This function is called: |
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* - To start a new Synchronization, by passing a {@link Sync_Start_Message} instance. |
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* - To synchronize a post, by passing a numeric ID. |
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* |
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* This function returns the parameter for the next call or NULL if there are no more posts to process. |
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* |
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* @param mixed $item Queue item to iterate over. |
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* |
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* @return int[]|false The next post IDs or false if there are no more. |
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*/ |
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protected function task( $item ) { |
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return $this->state->task( $item ); |
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} |
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/** |
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* Transition to the started state. |
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*/ |
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public function start() { |
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$this->state->leave(); |
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$this->state = new Sync_Background_Process_Started_State( $this, $this->sync_service, $this->sync_object_adapter_factory ); |
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$this->state->enter(); |
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} |
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/** |
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* Transition to the stopped state. |
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*/ |
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public function stop() { |
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$this->state->leave(); |
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$this->state = new Sync_Background_Process_Stopped_State( $this ); |
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$this->state->enter(); |
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} |
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/** |
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* Get the current state. |
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* |
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* @return string Either self::STARTED_STATE or self::STOPPED_STATE (default). |
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*/ |
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public function get_state() { |
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return get_option( '_wl_sync_background_process_state', self::STATE_STOPPED ); |
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} |
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/** |
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* Persist the current state. |
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* |
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* @param string $value |
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* |
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* @return bool |
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*/ |
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public function set_state( $value ) { |
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return null === $value |
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? delete_option( '_wl_sync_background_process_state' ) |
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: update_option( '_wl_sync_background_process_state', $value, true ); |
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} |
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public function get_info() { |
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return $this->state->get_info(); |
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} |
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} |
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insideout10 /
wordlift-plugin
