Lectern.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\block;
 
use pocketmine\block\tile\Lectern as TileLectern;
use pocketmine\block\utils\FacesOppositePlacingPlayerTrait;
use pocketmine\block\utils\SupportType;
use pocketmine\data\runtime\RuntimeDataDescriber;
use pocketmine\item\Item;
use pocketmine\item\WritableBookBase;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\sound\LecternPlaceBookSound;
use function count;
 
class Lectern extends Transparent{
    use FacesOppositePlacingPlayerTrait;
 
    protected int $viewedPage = 0;
    protected ?WritableBookBase $book = null;
 
    protected bool $producingSignal = false;
 
    protected function describeBlockOnlyState(RuntimeDataDescriber $w) : void{
        $w->horizontalFacing($this->facing);
        $w->bool($this->producingSignal);
    }
 
    public function readStateFromWorld() : Block{
        parent::readStateFromWorld();
        $tile = $this->position->getWorld()->getTile($this->position);
        if($tile instanceof TileLectern){
            $this->viewedPage = $tile->getViewedPage();
            $this->book = $tile->getBook();
        }
 
        return $this;
    }
 
    public function writeStateToWorld() : void{
        parent::writeStateToWorld();
        $tile = $this->position->getWorld()->getTile($this->position);
        if($tile instanceof TileLectern){
            $tile->setViewedPage($this->viewedPage);
            $tile->setBook($this->book);
        }
    }
 
    public function getFlammability() : int{
        return 30;
    }
 
    public function getDrops(Item $item) : array{
        $drops = parent::getDrops($item);
        if($this->book !== null){
            $drops[] = clone $this->book;
        }
 
        return $drops;
    }
 
    protected function recalculateCollisionBoxes() : array{
        return [AxisAlignedBB::one()->trim(Facing::UP, 0.1)];
    }
 
    public function getSupportType(int $facing) : SupportType{
        return SupportType::NONE;
    }
 
    public function isProducingSignal() : bool{ return $this->producingSignal; }
 
    public function setProducingSignal(bool $producingSignal) : self{
        $this->producingSignal = $producingSignal;
        return $this;
    }
 
    public function getViewedPage() : int{
        return $this->viewedPage;
    }
 
    public function setViewedPage(int $viewedPage) : self{
        $this->viewedPage = $viewedPage;
        return $this;
    }
 
    public function getBook() : ?WritableBookBase{
        return $this->book !== null ? clone $this->book : null;
    }
 
    public function setBook(?WritableBookBase $book) : self{
        $this->book = $book !== null && !$book->isNull() ? (clone $book)->setCount(1) : null;
        $this->viewedPage = 0;
        return $this;
    }
 
    public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null, array &$returnedItems = []) : bool{
        if($this->book === null && $item instanceof WritableBookBase){
            $world = $this->position->getWorld();
            $world->setBlock($this->position, $this->setBook($item));
            $world->addSound($this->position, new LecternPlaceBookSound());
            $item->pop();
        }
        return true;
    }
 
    public function onAttack(Item $item, int $face, ?Player $player = null) : bool{
        if($this->book !== null){
            $world = $this->position->getWorld();
            $world->dropItem($this->position->up(), $this->book);
            $world->setBlock($this->position, $this->setBook(null));
        }
        return false;
    }
 
    public function onPageTurn(int $newPage) : bool{
        if($newPage === $this->viewedPage){
            return true;
        }
        if($this->book === null || $newPage >= count($this->book->getPages()) || $newPage < 0){
            return false;
        }
 
        $this->viewedPage = $newPage;
        $world = $this->position->getWorld();
        if(!$this->producingSignal){
            $this->producingSignal = true;
            $world->scheduleDelayedBlockUpdate($this->position, 1);
        }
 
        $world->setBlock($this->position, $this);
 
        return true;
    }
 
    public function onScheduledUpdate() : void{
        if($this->producingSignal){
            $this->producingSignal = false;
            $this->position->getWorld()->setBlock($this->position, $this);
        }
    }
}