<?php
namespace Aws\S3\Crypto;
use Aws\Crypto\MaterialsProvider;
use Aws\Crypto\MetadataEnvelope;
use Aws\Crypto\MetadataStrategyInterface;
trait CryptoParamsTrait
{
protected function getMaterialsProvider(array $args)
{
if ($args['@MaterialsProvider'] instanceof MaterialsProvider) {
return $args['@MaterialsProvider'];
}
throw new \InvalidArgumentException('An instance of MaterialsProvider'
. ' must be passed in the "MaterialsProvider" field.');
}
protected function getInstructionFileSuffix(array $args)
{
return !empty($args['@InstructionFileSuffix'])
? $args['@InstructionFileSuffix']
: $this->instructionFileSuffix;
}
protected function determineGetObjectStrategy(
$result,
$instructionFileSuffix
) {
if (isset($result['Metadata'][MetadataEnvelope::CONTENT_KEY_V2_HEADER])) {
return new HeadersMetadataStrategy();
}
return new InstructionFileMetadataStrategy(
$this->client,
$instructionFileSuffix
);
}
protected function getMetadataStrategy(array $args, $instructionFileSuffix)
{
if (!empty($args['@MetadataStrategy'])) {
if ($args['@MetadataStrategy'] instanceof MetadataStrategyInterface) {
return $args['@MetadataStrategy'];
}
if (is_string($args['@MetadataStrategy'])) {
switch ($args['@MetadataStrategy']) {
case HeadersMetadataStrategy::class:
return new HeadersMetadataStrategy();
case InstructionFileMetadataStrategy::class:
return new InstructionFileMetadataStrategy(
$this->client,
$instructionFileSuffix
);
default:
throw new \InvalidArgumentException('Could not match the'
. ' specified string in "MetadataStrategy" to a'
. ' predefined strategy.');
}
} else {
throw new \InvalidArgumentException('The metadata strategy that'
. ' was passed to "MetadataStrategy" was unrecognized.');
}
} elseif ($instructionFileSuffix) {
return new InstructionFileMetadataStrategy(
$this->client,
$instructionFileSuffix
);
}
return null;
}
}