Collection.php

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<?php

declare(strict_types=1);
namespace ILIAS\GlobalScreen\ScreenContext\AdditionalData;

use LogicException;

class Collection
{
    private $values = [];

    public function getData() : array
    {
        return $this->values;
    }

    public function add(string $key, $value) : void
    {
        if ($this->exists($key)) {
            throw new LogicException("Key $key already exists.");
        }
        $this->values[$key] = $value;
    }

    public function get(string $key)
    {
        return $this->values[$key];
    }

    public function is(string $key, $expected_value) : bool
    {
        return ($this->exists($key) && $this->get($key) === $expected_value);
    }

    public function exists(string $key) : bool
    {
        return isset($this->values[$key]);
    }

    public function replace(string $key, $value) : void
    {
        if (!$this->exists($key)) {
            throw new LogicException("Key $key does not exists.");
        }
        $this->values[$key] = $value;
    }
}