/**
* @param string $itemName The property name
* @param SearchQueryExpr $value The sub query
* @return string
*/
protected function processSubQueryValue($itemName, SearchQueryExpr $value)
{
if ($value->isEmpty()) {
return '';
}
$result = $this->processExpr($value, $itemName);
if ($value->isComplex()) {
$result = sprintf('(%s)', $result);
}
return $result;
}
/**
* Arranges the given search expression before it can be converted to its string representation
* As IMAP SEARCH command uses prefixed OR operator in its search expressions we need to prepare
* our search expression before it will be converted to a string.
* Examples:
* 'val1 OR val2' need to be changed to 'OR val1 val2'
* 'val1 OR val2 OR val3' need to be changed to 'OR val1 OR val2 val3'
* 'NOT val1 OR val2' need to be changed to 'OR NOT val1 val2'
*
* @param SearchQueryExpr $expr The search expression
* @return SearchQueryExpr
*/
protected function arrangeExpr(SearchQueryExpr $expr)
{
// Make a clone of the expression and find out OR operators
$result = new SearchQueryExpr();
$orOperatorPositions = array();
$i = 0;
foreach ($expr as $item) {
if ($item instanceof SearchQueryExprOperator) {
$result->add($item);
if ($item->getName() === 'OR') {
$orOperatorPositions[] = $i;
}
} elseif ($item instanceof SearchQueryExpr) {
$result->add($this->arrangeExpr($item));
} else {
/** @var SearchQueryExprValueBase $item */
$value = $item->getValue();
if ($value instanceof SearchQueryExpr) {
$item->setValue($this->arrangeExpr($value));
}
$result->add($item);
}
$i++;
}
// Arrange OR operators is any
foreach ($orOperatorPositions as $orPos) {
$i = $orPos - 1;
$parenthesisCounter = 0;
while ($i >= 0) {
$item = $result[$i];
if ($item instanceof SearchQueryExprOperator) {
/** @var SearchQueryExprOperator $item */
switch ($item->getName()) {
case '(':
$parenthesisCounter--;
break;
case ')':
$parenthesisCounter++;
break;
}
} elseif ($parenthesisCounter === 0) {
$this->moveOperator($result, $orPos, $this->correctNewPositionOfOperatorIfNeeded($result, $i));
break;
}
$i--;
}
if ($i === -1 && $parenthesisCounter === 0) {
$this->moveOperator($result, $orPos, 0);
}
}
return $result;
}
/**
* {@inheritdoc}
*/
protected function processSubQueryValue($itemName, SearchQueryExpr $value)
{
if ($value->isEmpty()) {
return '';
}
if ($itemName !== null) {
$keyword = $this->getKeyword($itemName);
if (!$keyword) {
throw new \InvalidArgumentException(sprintf('Unsupported property "%s".', $itemName));
}
$result = sprintf('%s%s', $keyword, $this->getNameValueDelimiter());
} else {
$result = '';
}
$expr = $this->processExpr($value);
$result .= $value->isComplex() ? sprintf('(%s)', $expr) : $expr;
return $result;
}
private function andOperatorIfNeeded()
{
$exprItems = $this->expr->getItems();
$lastIndex = count($exprItems) - 1;
if ($lastIndex != -1) {
$lastItem = $exprItems[$lastIndex];
if (!$lastItem instanceof SearchQueryExprOperator || $lastItem instanceof SearchQueryExprOperator && $lastItem->getName() == ')') {
$this->andOperator();
}
}
}
