MarqueeTask.php

<?php

namespace shoghicp\MinecraftSimulator\task;

use pocketmine\Player;
use pocketmine\scheduler\PluginTask;
use shoghicp\MinecraftSimulator\Loader;

class MarqueeTask extends PluginTask{

	const MAX_LEN = 35;

	private $scheduler;
	private $player;
	private $nextString;
	private $message;
	private $index;
	private $delay;
	private $format;

	public function __construct(Loader $plugin, Player $player, $message, $step = null, $format = ""){
		parent::__construct($plugin);
		$this->player = $player;
		$this->scheduler = $plugin->getServer()->getScheduler();
		$this->delay = $step === null ? (strlen($message) > self::MAX_LEN ? 2 : 3) : $step;
		$this->message = str_repeat(" ", self::MAX_LEN) . $message . str_repeat(" ", self::MAX_LEN);
		$this->index = 0;
		$this->format = $format;
		$this->scheduleNext();
	}

	public function onRun($currentTick){
		if($this->message === null or !$this->player->isConnected()){
			return;
		}

		$this->player->sendPopup($this->format . $this->nextString);

		$this->scheduleNext();
	}

	private function scheduleNext(){
		$entry = $this->nextEntry();
		if($entry){
			$this->scheduler->scheduleDelayedTask($this, $this->delay);
		}else{
			$this->message = null;
		}

	}

	private function nextEntry(){
		if($this->index > strlen($this->message)){
			return false;
		}

		$this->nextString = substr($this->message, $this->index, self::MAX_LEN);
		++$this->index;

		return true;
	}
}