CallableObjective.php

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<?php

/* Copyright (c) 2019 Richard Klees <richard.klees@concepts-and-training.de> Extended GPL, see docs/LICENSE */

namespace ILIAS\Setup;

use ILIAS\UI;

class CallableObjective implements Objective
{
    protected $callable;

    protected $label;

    protected $is_notable;

    protected $preconditions;

    public function __construct(callable $callable, string $label, bool $is_notable, Objective ...$preconditions)
    {
        $this->callable = $callable;
        $this->label = $label;
        $this->is_notable = $is_notable;
        $this->preconditions = $preconditions;
    }

    public function getHash() : string
    {
        return hash(
            "sha256",
            spl_object_hash($this)
        );
    }

    public function getLabel() : string
    {
        return $this->label;
    }

    public function isNotable() : bool
    {
        return $this->is_notable;
    }

    public function getPreconditions(Environment $environment) : array
    {
        return $this->preconditions;
    }

    public function achieve(Environment $environment) : Environment
    {
        $res = call_user_func($this->callable, $environment);
        if ($res instanceof Environment) {
            return $res;
        }
        return $environment;
    }
}