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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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declare(strict_types=1);
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namespace Dotenv\Repository\Adapter;
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use PhpOption\Option;
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use PhpOption\Some;
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final class EnvConstAdapter implements AdapterInterface
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{
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    /**
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     * Create a new env const adapter instance.
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     *
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     * @return void
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     */
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    private function __construct()
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    {
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        //
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    }
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    /**
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     * Create a new instance of the adapter, if it is available.
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     *
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     * @return \PhpOption\Option<\Dotenv\Repository\Adapter\AdapterInterface>
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     */
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    public static function create()
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    {
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        /** @var \PhpOption\Option<AdapterInterface> */
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        return Some::create(new self());
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    }
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    /**
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     * Read an environment variable, if it exists.
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     *
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     * @param non-empty-string $name
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     *
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     * @return \PhpOption\Option<string>
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     */
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    public function read(string $name)
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    {
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        /** @var \PhpOption\Option<string> */
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        return Option::fromArraysValue($_ENV, $name)
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            ->filter(static function ($value) {
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                return \is_scalar($value);
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            })
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            ->map(static function ($value) {
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                if ($value === false) {
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                    return 'false';
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                }
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                if ($value === true) {
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                    return 'true';
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                }
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                /** @psalm-suppress PossiblyInvalidCast */
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                return (string) $value;
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            });
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    }
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    /**
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     * Write to an environment variable, if possible.
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     *
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     * @param non-empty-string $name
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     * @param string           $value
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     *
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     * @return bool
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     */
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    public function write(string $name, string $value)
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    {
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        $_ENV[$name] = $value;
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        return true;
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    }
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    /**
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     * Delete an environment variable, if possible.
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     *
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     * @param non-empty-string $name
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     *
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     * @return bool
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     */
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    public function delete(string $name)
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    {
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        unset($_ENV[$name]);
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        return true;
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    }
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}