AbstractMap.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\GlobalScreen\Collector\Map;
 
use ArrayObject;
use Closure;
use ILIAS\GlobalScreen\Identification\IdentificationInterface;
use ILIAS\GlobalScreen\isGlobalScreenItem;
 
abstract class AbstractMap implements Filterable, Walkable
{
    protected ArrayObject $raw;
    protected array $filters = [];
    protected ArrayObject $filtered;
 
    public function __construct()
    {
        $this->raw = new ArrayObject();
    }
 
    protected function getTitleSorter(): Closure
    {
        return static fn(isGlobalScreenItem $item_one, isGlobalScreenItem $item_two): int => 0;
    }
 
    protected function getPositionSorter(): Closure
    {
        return static fn(isGlobalScreenItem $item_one, isGlobalScreenItem $item_two): int => 0;
    }
 
    public function add(isGlobalScreenItem $item): void
    {
        $serialize = $item->getProviderIdentification()->serialize();
        if (0 < strlen($serialize)) {
            $this->raw[$serialize] = $item;
        }
    }
 
    public function addMultiple(isGlobalScreenItem ...$items): void
    {
        foreach ($items as $item) {
            $this->add($item);
        }
    }
 
    public function getSingleItemFromRaw(IdentificationInterface $identification): ?isGlobalScreenItem
    {
        if ($this->raw->offsetExists($identification->serialize())) {
            $item = $this->raw->offsetGet($identification->serialize());
 
            return $item ?? $this->getLostItem($identification);
        }
        return $this->getLostItem($identification);
    }
 
    public function getSingleItemFromFilter(IdentificationInterface $identification): ?isGlobalScreenItem
    {
        $this->applyFilters();
 
        if ($this->filtered->offsetExists($identification->serialize())) {
            $item = $this->filtered->offsetGet($identification->serialize());
        }
 
        return $item ?? $this->getLostItem($identification);
    }
 
    public function remove(IdentificationInterface $identification): void
    {
        $this->raw->offsetUnset($identification->serialize());
    }
 
    public function existsInFilter(IdentificationInterface $identification): bool
    {
        $this->applyFilters();
 
        return $this->filtered->offsetExists($identification->serialize());
    }
 
    public function has(): bool
    {
        return $this->raw->count() > 0;
    }
 
    protected function applyFilters(): void
    {
        if (!isset($this->filtered)) {
            $this->filtered = new ArrayObject($this->raw->getArrayCopy());
        }
        if ($this->filters !== []) {
            $filter_copy = isset($this->filtered) ? $this->filtered->getArrayCopy() : $this->raw->getArrayCopy();
            foreach ($this->filters as $filter) {
                $filter_copy = array_filter($filter_copy, $filter);
            }
            $this->filtered->exchangeArray($filter_copy);
            $this->filters = [];
        }
    }
 
    public function getAllFromRaw(): \Generator
    {
        yield from $this->raw;
    }
 
    public function getAllFromFilter(): \Generator
    {
        $this->applyFilters();
 
        yield from $this->filtered;
    }
 
    public function walk(Closure $c): void
    {
        $this->applyFilters();
        $to_walk = (array) $this->filtered->getArrayCopy();
        array_walk($to_walk, $c);
        $this->filtered = new ArrayObject($to_walk);
    }
 
    public function filter(Closure $c): void
    {
        $this->filters[] = $c;
    }
 
    public function sort(): void
    {
        $this->applyFilters();
 
        $this->filtered->uasort($this->getTitleSorter());
        $this->filtered->uasort($this->getPositionSorter());
    }
 
 
 
    protected function getLostItem(IdentificationInterface $identification): ?isGlobalScreenItem
    {
        return null;
    }
}