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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Common\Attribute;
use function array_key_exists;
use function count;
use function is_array;
use function is_string;
use function mb_substr;
use OpenTelemetry\API\Behavior\LogsMessagesTrait;
/**
* @internal
*/
final class AttributesBuilder implements AttributesBuilderInterface
{
use LogsMessagesTrait;
private array $attributes;
private ?int $attributeCountLimit;
private ?int $attributeValueLengthLimit;
private int $droppedAttributesCount;
private AttributeValidatorInterface $attributeValidator;
public function __construct(
array $attributes,
?int $attributeCountLimit,
?int $attributeValueLengthLimit,
int $droppedAttributesCount,
?AttributeValidatorInterface $attributeValidator
) {
$this->attributes = $attributes;
$this->attributeCountLimit = $attributeCountLimit;
$this->attributeValueLengthLimit = $attributeValueLengthLimit;
$this->droppedAttributesCount = $droppedAttributesCount;
$this->attributeValidator = $attributeValidator ?? new AttributeValidator();
}
public function build(): AttributesInterface
{
return new Attributes($this->attributes, $this->droppedAttributesCount);
}
public function offsetExists($offset): bool
{
return array_key_exists($offset, $this->attributes);
}
/**
* @phan-suppress PhanUndeclaredClassAttribute
*/
#[\ReturnTypeWillChange]
public function offsetGet($offset)
{
return $this->attributes[$offset] ?? null;
}
/**
* @phan-suppress PhanUndeclaredClassAttribute
*/
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
if ($offset === null) {
return;
}
if ($value === null) {
unset($this->attributes[$offset]);
return;
}
if (!$this->attributeValidator->validate($value)) {
self::logWarning($this->attributeValidator->getInvalidMessage() . ': ' . $offset);
$this->droppedAttributesCount++;
return;
}
if (count($this->attributes) === $this->attributeCountLimit && !array_key_exists($offset, $this->attributes)) {
$this->droppedAttributesCount++;
return;
}
$this->attributes[$offset] = $this->normalizeValue($value);
//@todo "There SHOULD be a message printed in the SDK's log to indicate to the user that an attribute was
// discarded due to such a limit. To prevent excessive logging, the message MUST be printed at most
// once per <thing> (i.e., not per discarded attribute)."
}
/**
* @phan-suppress PhanUndeclaredClassAttribute
*/
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
unset($this->attributes[$offset]);
}
private function normalizeValue($value)
{
if (is_string($value) && $this->attributeValueLengthLimit !== null) {
return mb_substr($value, 0, $this->attributeValueLengthLimit);
}
if (is_array($value)) {
foreach ($value as $k => $v) {
$processed = $this->normalizeValue($v);
if ($processed !== $v) {
$value[$k] = $processed;
}
}
return $value;
}
return $value;
}
}
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