public function getObjectAsync()

in src/S3/Crypto/S3EncryptionClientV2.php [324:402]
69 lines of code
8 McCabe index (conditional complexity)

    public function getObjectAsync(array $args)
    {
        $provider = $this->getMaterialsProvider($args);
        unset($args['@MaterialsProvider']);

        $instructionFileSuffix = $this->getInstructionFileSuffix($args);
        unset($args['@InstructionFileSuffix']);

        $strategy = $this->getMetadataStrategy($args, $instructionFileSuffix);
        unset($args['@MetadataStrategy']);

        if (!isset($args['@SecurityProfile'])
            || !in_array($args['@SecurityProfile'], self::$supportedSecurityProfiles)
        ) {
            throw new CryptoException("@SecurityProfile is required and must be"
                . " set to 'V2' or 'V2_AND_LEGACY'");
        }

        // Only throw this legacy warning once per client
        if (in_array($args['@SecurityProfile'], self::$legacySecurityProfiles)
            && $this->legacyWarningCount < 1
        ) {
            $this->legacyWarningCount++;
            trigger_error(
                "This S3 Encryption Client operation is configured to"
                    . " read encrypted data with legacy encryption modes. If you"
                    . " don't have objects encrypted with these legacy modes,"
                    . " you should disable support for them to enhance security. ",
                E_USER_WARNING
            );
        }

        $saveAs = null;
        if (!empty($args['SaveAs'])) {
            $saveAs = $args['SaveAs'];
        }

        $promise = $this->client->getObjectAsync($args)
            ->then(
                function ($result) use (
                    $provider,
                    $instructionFileSuffix,
                    $strategy,
                    $args
                ) {
                    if ($strategy === null) {
                        $strategy = $this->determineGetObjectStrategy(
                            $result,
                            $instructionFileSuffix
                        );
                    }

                    $envelope = $strategy->load($args + [
                        'Metadata' => $result['Metadata']
                    ]);

                    $result['Body'] = $this->decrypt(
                        $result['Body'],
                        $provider,
                        $envelope,
                        $args
                    );
                    return $result;
                }
            )->then(
                function ($result) use ($saveAs) {
                    if (!empty($saveAs)) {
                        file_put_contents(
                            $saveAs,
                            (string)$result['Body'],
                            LOCK_EX
                        );
                    }
                    return $result;
                }
            );

        return $promise;
    }