<?php
/*
This is a test for formula framework prototype.
*/
$formulaPath = './';
$operandsPath = $formulaPath . 'Operands/';
$operatorsPath = $formulaPath . 'Operators/';
require $formulaPath . 'Atom.php';
require $formulaPath . 'Operand.php';
require $formulaPath . 'Operator.php';
require $formulaPath . 'FormulaUtils.php';
$directory = new DirectoryIterator($operandsPath);
foreach ($directory as $fileInfo) {
if ($fileInfo->isFile()) {
require $operandsPath . $fileInfo->getFilename();
}
}
$directory = new DirectoryIterator($operatorsPath);
foreach ($directory as $fileInfo) {
if ($fileInfo->isFile()) {
require $operatorsPath . $fileInfo->getFilename();
}
}
$object = FormulaUtils::parse('not (1 = 2)');
// There is the formula to parse.
print_r($object);
echo $object->getValue();
/**
* Converts an array of instances to a formula object.
*
* @param array $aFormula
* @return Atom
* @throws EyeUnexpectedValueException Wrong formula sintax.
*/
public static function sortByPriority($aFormula)
{
$aFormula = FormulaUtils::sortByPharentesis($aFormula);
$aFormulaSize = count($aFormula);
foreach (FormulaUtils::$Operators as $operatorClass) {
$i = 0;
while ($i < $aFormulaSize) {
if (get_class($aFormula[$i]) == $operatorClass) {
if ($aFormula[$i]->isUnitary()) {
// If is unitary,
if ($aFormulaSize <= $i + 1) {
// there should be another operand at right of the current operator.
throw new EyeUnexpectedValueException($operatorClass . ' has not any argument.');
}
$aFormula[$i]->addOperand($aFormula[$i + 1]);
array_splice($aFormula, $i + 1, 1);
// Deleting the right operand
--$aFormulaSize;
++$i;
} else {
// Else, if can have multiple operands,
if ($i == 0 || $aFormulaSize <= $i + 1) {
// there should be two operands. One at left and one at right of the current operator.
throw new EyeUnexpectedValueException($operatorClass . ' has not any argument.');
}
$aFormula[$i]->addOperand($aFormula[$i - 1]);
$aFormula[$i]->addOperand($aFormula[$i + 1]);
array_splice($aFormula, $i - 1, 1);
// Deleting the left operand
array_splice($aFormula, $i, 1);
// Deleting the right operand
$aFormulaSize -= 2;
}
} else {
++$i;
}
}
}
return $aFormula[0];
}
