Collection.php

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<?php namespace ILIAS\GlobalScreen\ScreenContext\AdditionalData;
 
use LogicException;
 
class Collection
{
 
    private $values = [];
 
 
    public function getData() : array
    {
        return $this->values;
    }
 
 
    public function add(string $key, $value)
    {
        if ($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, $value)
    {
        if (!$this->exists($key)) {
            throw new LogicException("Key {$key} does not exists.");
        }
        $this->values[$key] = $value;
    }
}