/**
* Merge this operation into a (previous) operation.
*
* @param IOperation $prevOp
* @return IOperation
*/
public function mergeWith($prevOp)
{
if (!$prevOp) {
return $this;
} else {
if ($prevOp instanceof SetOperation) {
return new SetOperation($this->getKey(), $this->applyOn($prevOp->getValue()));
} else {
if ($prevOp instanceof IncrementOperation) {
return new IncrementOperation($this->getKey(), $this->applyOn($prevOp->getValue()));
} else {
if ($prevOp instanceof DeleteOperation) {
return new SetOperation($this->getKey(), $this->getValue());
} else {
throw new \ErrorException("Operation incompatible with previous one.");
}
}
}
}
}
/**
* Merge this operation into a (previous) operation.
*
* @param IOperation $prevOp
* @return IOperation
*/
public function mergeWith($prevOp)
{
if (!$prevOp) {
return $this;
} else {
if ($prevOp instanceof SetOperation) {
if (!is_array($prevOp->getValue())) {
throw new \RuntimeException("Operation incompatible " . "with previous value.");
}
return new SetOperation($this->key, $this->applyOn($prevOp->getValue()));
} else {
if ($prevOp instanceof ArrayOperation && $this->getOpType() === $prevOp->getOpType()) {
if ($this->getOpType() === "Remove") {
$objects = array_merge($prevOp->getValue(), $this->getValue());
} else {
$objects = $this->applyOn($prevOp->getValue());
}
return new ArrayOperation($this->key, $objects, $this->getOpType());
} else {
if ($prevOp instanceof DeleteOperation) {
if ($this->getOpType() === "Remove") {
return $prevOp;
} else {
return new SetOperation($this->getKey(), $this->applyOn(null));
}
} else {
throw new \RuntimeException("Operation incompatible with" . " previous one.");
}
}
}
}
}
/**
* Apply operation
*
* @param IOperation $operation
* @return void
*/
private function _applyOperation($operation)
{
$key = $operation->getKey();
$oldval = $this->get($key);
$newval = $operation->applyOn($oldval, $this);
if ($newval !== null) {
$this->_data[$key] = $newval;
} else {
if (isset($this->_data[$key])) {
unset($this->_data[$key]);
}
}
$prevOp = $this->_getPreviousOp($key);
$newOp = $prevOp ? $operation->mergeWith($prevOp) : $operation;
$this->_operationSet[$key] = $newOp;
}