A snapshot of LegionPE hub's core code

LegionPE Hub Core.php

<?php
class HubPlugin extends PluginBase{
	public function onChat(PlayerChatEvent $event){ // if session is not self::HUB, monitor it. if session is self::HUB, prevent typing password here
		$p = $event->getPlayer();
		if(($s = $this->sessions[$p->getID()]) < self::HUB or $s >= self::LOGIN){ // if not authed
			$event->setCancelled(true);
		}
		elseif($this->getDb($p)->get("pw-hash") === $this->hash($event->getMessage())){ // if authed but is telling password
			$event->setCancelled(true);
			$p->sendMessage("Never talk loudly to others your password!");
		}
		if($s === self::REGISTER){ // request repeat password: registry wizard step 1
			$this->tmpPws[$p->getID()] = $event->getMessage();
			$p->sendMessage("Step 2:");
			$p->sendMessage("Please enter your password again to confirm.");
			$this->sessions[$p->getID()] ++;
		}
		elseif($s === self::REGISTER + 1){ // check repeated password: registry wizard step 2
			if($this->tmpPws[$p->getID()] === $event->getMessage()){ // choose team, if matches password
				$p->sendMessage("The password matches! Type this password into your chat and send it next time you login.");
				$p->sendMessage("LegionPE registry wizard closed!");
				$this->getDb($p)->set("pw-hash", $this->hash($event->getMessage()));
				var_export($this->hash($event->getMessage()));
				var_export($this->hash($event->getMessage()));
				$this->getDb($p)->save();
				$this->sessions[$p->getID()]++;
				unset($this->tmpPws[$p->getID()]);
				console($p->getDisplayName()." successfully registered!");
				$this->onRegistered($p);
			}
			else{ // if password different
				$p->sendMessage("Password doesn't match! Going back to step 1.");
				$p->sendMessage("Please type your password in the chat.");
				$this->sessions[$p->getID()] = self::REGISTER;
			}
		}
		elseif($s >= self::LOGIN){ // check password, if session is waiting login
			$hash = $this->getDb($p)->get("pw-hash");
			if($this->hash($event->getMessage()) === $hash){ // auth, if password matches
				if($this->getDb($p)->get("ip-auth") !== false){ // update IP
					$this->getDb($p)->set("ip-auth", $p->getAddress());
					$p->sendMessage("Your IP address has been updated to \"{$p->getAddress()}\".");
				}
				$this->onAuthPlayer($p);
			}
			else{ // add session, if password doesn't match
				$p->sendMessage("Password doesn't match! Please try again.");
				$this->sessions[$p->getID()]++;
				if($s >= self::LOGIN_MAX){ // if reaches maximum trials of login
					$p->sendMessage("You exceeded the max number of trials to login! You are being kicked.");
					$this->getServer()->getScheduler()->scheduleDelayedTask(
						new CallbackPluginTask(array($p, "close"), $this, array("Failing to auth.", "Auth failure"), true), 80);
				}
			}
		}
	}
}
?>
<?php
class Hub{
	protected function joinMg(Player $p, MgMain $mg){
		$TID = $this->hub->getDb($p)->get("team");
		if(($reason = $mg->isJoinable($p, $TID)) === true){
			$this->server->getScheduler()->scheduleDelayedTask(new CallbackPluginTask(array($p, "teleport"), $this->hub, $mg->getSpawn($p, $TID)), 40);
			$p->teleport($mg->getSpawn($p, $TID));
			$p->sendMessage("You are teleported to the");
			$p->sendMessage("  ".$mg->getName()." world! You might lag!");
			$this->teleports[$p->getID()] = time();
			$this->hub->sessions[$p->getID()] = $mg->getSessionId();
			if(!$this->hub->getDb($p)->get("mute")){
				$this->setChannel($p, $mg->getDefaultChatChannel($p, $TID));
			}
			$mg->onJoinMg($p);
		}
		else{
			$p->sendMessage("{$mg->getName()} cannot be joined currently due to $reason!");
			$p->teleport(RL::spawn());
		}
	}
	public function parseChannel(Player $player, $chan){
		$t = $this->hub->getDb($player)->get("team");
		$s = $this->hub->getSession($player);
		$spleef = ($s === HubPlugin::SPLEEF);
		switch(strtolower($chan)){
			case "general":
			case "gen":
			case "g":
			case "public":
			case "pub":
			case "p":
				$ch = "public";
				break;
			case "team":
			case  "t":
				$ch = $t;
				break;
			case "arena":
			case "a":
			case "at":
			case "arenateam":
			case "teamarena":
			case "ta":
				if($spleef){
					$ch = Spleef::get()->getArena($player);
					if($ch !== false){
						$ch = "s".$ch.((stripos($chan, "t") !== false) ? (".t".$t):"");
						break;
					}
				}
				$player->sendMessage("You are not in a spleef arena! Your chat channel will be set to the default one in your minigame.");
				$ch = $this->getMgClass($player);
				eval("return $ch::get()->getDefaultChatChannel(\$player, \$t);");
				break;
			default:
				$player->sendMessage("Unidentified chat channel identifier $chan. Your chat channel will be set to the default one in your minigame.");
				$ch = $this->getMgClass($player);
				eval("return $ch::get()->getDefaultChatChannel(\$player, \$t);");
				break;
		}
		return "legionpe.chat.".$this->getMgClass($player, true, true).$ch;
	}
}
?>
<?php
abstract class MgMain{
	public abstract  function onJoinMg(Player $player);
	public abstract function onQuitMg(Player $player);
	public abstract function getName();
	public abstract function getSessionId();
	/**
	 * @return \pocketmine\level\Position
	 */
	public abstract function getSpawn(Player $player, $TID);
	/**
	 * @return string
	 */
	public abstract function getDefaultChatChannel(Player $player, $TID);
	/**
	 * @return bool
	 */
	public abstract function isJoinable();
	/**
	 * @return string|bool|null string stat message, boolean false or null
	 */
	public abstract function getStats(Player $player, array $args = []);
//	public abstract static function init();
	/**
	 * @return self
	 */
//	public abstract static function get();
}
?>