ProblemBuilder.php

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<?php

declare(strict_types=1);

namespace ILIAS\Refinery;

use Closure;

trait ProblemBuilder
{
    abstract protected function getError();

    final public function withProblemBuilder(callable $builder): self
    {
        $clone = clone $this;
        $clone->error = $builder;
        return $clone;
    }

    final public function getErrorMessage($value): string
    {
        $error = $this->getError();
        if (!is_callable($error)) {
            return $error;
        }
        $lng_closure = $this->getLngClosure();
        return $error($lng_closure, $value);
    }

    final protected function getLngClosure(): Closure
    {
        return function (string $lang_var, ...$args): string {
            $error = $this->lng->txt($lang_var);

            if ($args === []) {
                return $error;
            }

            return sprintf($error, ...array_map(function ($v) {
                if (is_array($v)) {
                    return "array";
                } elseif (is_null($v)) {
                    return "null";
                } elseif (is_object($v) && !method_exists($v, "__toString")) {
                    return get_class($v);
                }
                return $v;
            }, $args));
        };
    }
}