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<?php /** * Whoops - php errors for cool kids * @author Filipe Dobreira <http://github.com/filp> */
namespace Whoops\Exception;
use ArrayAccess; use ArrayIterator; use Countable; use IteratorAggregate; use Serializable; use UnexpectedValueException;
/** * Exposes a fluent interface for dealing with an ordered list * of stack-trace frames. */ class FrameCollection implements ArrayAccess, IteratorAggregate, Serializable, Countable { /** * @var array[] */ private $frames;
/** * @param array $frames */ public function __construct(array $frames) { $this->frames = array_map(function ($frame) { return new Frame($frame); }, $frames); }
/** * Filters frames using a callable, returns the same FrameCollection * * @param callable $callable * @return FrameCollection */ public function filter($callable) { $this->frames = array_filter($this->frames, $callable); return $this; }
/** * Map the collection of frames * * @param callable $callable * @return FrameCollection */ public function map($callable) { // Contain the map within a higher-order callable // that enforces type-correctness for the $callable $this->frames = array_map(function ($frame) use ($callable) { $frame = call_user_func($callable, $frame);
if (!$frame instanceof Frame) { throw new UnexpectedValueException( "Callable to " . __METHOD__ . " must return a Frame object" ); }
return $frame; }, $this->frames);
return $this; }
/** * Returns an array with all frames, does not affect * the internal array. * * @todo If this gets any more complex than this, * have getIterator use this method. * @see FrameCollection::getIterator * @return array */ public function getArray() { return $this->frames; }
/** * @see IteratorAggregate::getIterator * @return ArrayIterator */ public function getIterator() { return new ArrayIterator($this->frames); }
/** * @see ArrayAccess::offsetExists * @param int $offset */ public function offsetExists($offset) { return isset($this->frames[$offset]); }
/** * @see ArrayAccess::offsetGet * @param int $offset */ public function offsetGet($offset) { return $this->frames[$offset]; }
/** * @see ArrayAccess::offsetSet * @param int $offset */ public function offsetSet($offset, $value) { throw new \Exception(__CLASS__ . ' is read only'); }
/** * @see ArrayAccess::offsetUnset * @param int $offset */ public function offsetUnset($offset) { throw new \Exception(__CLASS__ . ' is read only'); }
/** * @see Countable::count * @return int */ public function count() { return count($this->frames); }
/** * @see Serializable::serialize * @return string */ public function serialize() { return serialize($this->frames); }
/** * @see Serializable::unserialize * @param string $serializedFrames */ public function unserialize($serializedFrames) { $this->frames = unserialize($serializedFrames); }
/** * @param Frame[] $frames Array of Frame instances, usually from $e->getPrevious() */ public function prependFrames(array $frames) { $this->frames = array_merge($frames, $this->frames); }
/** * Gets the innermost part of stack trace that is not the same as that of outer exception * * @param FrameCollection $parentFrames Outer exception frames to compare tail against * @return Frame[] */ public function topDiff(FrameCollection $parentFrames) { $diff = $this->frames;
$parentFrames = $parentFrames->getArray(); $p = count($parentFrames)-1;
for ($i = count($diff)-1; $i >= 0 && $p >= 0; $i--) { /** @var Frame $tailFrame */ $tailFrame = $diff[$i]; if ($tailFrame->equals($parentFrames[$p])) { unset($diff[$i]); } $p--; } return $diff; } }
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