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<?php

namespace Laminas\I18n\Translator\Loader;

use Laminas\I18n\Exception;
use Laminas\I18n\Translator\Plural\Rule as PluralRule;
use Laminas\I18n\Translator\TextDomain;

use function gettype;
use function is_array;
use function is_file;
use function is_readable;
use function sprintf;
use function stream_resolve_include_path;

/**
 * PHP array loader.
 */
class PhpArray extends AbstractFileLoader
{
    /**
     * load(): defined by FileLoaderInterface.
     *
     * @see    FileLoaderInterface::load()
     *
     * @param  string $locale
     * @param  string $filename
     * @return TextDomain
     * @throws Exception\InvalidArgumentException
     */
    public function load($locale, $filename)
    {
        $resolvedIncludePath = stream_resolve_include_path($filename);
        $fromIncludePath     = $resolvedIncludePath !== false ? $resolvedIncludePath : $filename;
        if (! $fromIncludePath || ! is_file($fromIncludePath) || ! is_readable($fromIncludePath)) {
            throw new Exception\InvalidArgumentException(sprintf(
                'Could not find or open file %s for reading',
                $filename
            ));
        }

        $messages = include $fromIncludePath;

        if (! is_array($messages)) {
            throw new Exception\InvalidArgumentException(sprintf(
                'Expected an array, but received %s',
                gettype($messages)
            ));
        }

        $textDomain = new TextDomain($messages);

        if ($textDomain->offsetExists('')) {
            if (isset($textDomain['']['plural_forms'])) {
                $textDomain->setPluralRule(
                    PluralRule::fromString($textDomain['']['plural_forms'])
                );
            }

            unset($textDomain['']);
        }

        return $textDomain;
    }
}