Developer
<?php
namespace PhpOffice\PhpSpreadsheet\Calculation;
/**
* PARTLY BASED ON:
* Copyright (c) 2007 E. W. Bachtal, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* The software is provided "as is", without warranty of any kind, express or implied, including but not
* limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In
* no event shall the authors or copyright holders be liable for any claim, damages or other liability,
* whether in an action of contract, tort or otherwise, arising from, out of or in connection with the
* software or the use or other dealings in the software.
*
* https://ewbi.blogs.com/develops/2007/03/excel_formula_p.html
* https://ewbi.blogs.com/develops/2004/12/excel_formula_p.html
*/
class FormulaParser
{
// Character constants
const QUOTE_DOUBLE = '"';
const QUOTE_SINGLE = '\'';
const BRACKET_CLOSE = ']';
const BRACKET_OPEN = '[';
const BRACE_OPEN = '{';
const BRACE_CLOSE = '}';
const PAREN_OPEN = '(';
const PAREN_CLOSE = ')';
const SEMICOLON = ';';
const WHITESPACE = ' ';
const COMMA = ',';
const ERROR_START = '#';
const OPERATORS_SN = '+-';
const OPERATORS_INFIX = '+-*/^&=><';
const OPERATORS_POSTFIX = '%';
/**
* Formula.
*
* @var string
*/
private $formula;
/**
* Tokens.
*
* @var FormulaToken[]
*/
private $tokens = [];
/**
* Create a new FormulaParser.
*
* @param ?string $formula Formula to parse
*/
public function __construct($formula = '')
{
// Check parameters
if ($formula === null) {
throw new Exception('Invalid parameter passed: formula');
}
// Initialise values
$this->formula = trim($formula);
// Parse!
$this->parseToTokens();
}
/**
* Get Formula.
*
* @return string
*/
public function getFormula()
{
return $this->formula;
}
/**
* Get Token.
*
* @param int $id Token id
*/
public function getToken(int $id = 0): FormulaToken
{
if (isset($this->tokens[$id])) {
return $this->tokens[$id];
}
throw new Exception("Token with id $id does not exist.");
}
/**
* Get Token count.
*
* @return int
*/
public function getTokenCount()
{
return count($this->tokens);
}
/**
* Get Tokens.
*
* @return FormulaToken[]
*/
public function getTokens()
{
return $this->tokens;
}
/**
* Parse to tokens.
*/
private function parseToTokens(): void
{
// No attempt is made to verify formulas; assumes formulas are derived from Excel, where
// they can only exist if valid; stack overflows/underflows sunk as nulls without exceptions.
// Check if the formula has a valid starting =
$formulaLength = strlen($this->formula);
if ($formulaLength < 2 || $this->formula[0] != '=') {
return;
}
// Helper variables
$tokens1 = $tokens2 = $stack = [];
$inString = $inPath = $inRange = $inError = false;
$nextToken = null;
//$token = $previousToken = null;
$index = 1;
$value = '';
$ERRORS = ['#NULL!', '#DIV/0!', '#VALUE!', '#REF!', '#NAME?', '#NUM!', '#N/A'];
$COMPARATORS_MULTI = ['>=', '<=', '<>'];
while ($index < $formulaLength) {
// state-dependent character evaluation (order is important)
// double-quoted strings
// embeds are doubled
// end marks token
if ($inString) {
if ($this->formula[$index] == self::QUOTE_DOUBLE) {
if ((($index + 2) <= $formulaLength) && ($this->formula[$index + 1] == self::QUOTE_DOUBLE)) {
$value .= self::QUOTE_DOUBLE;
++$index;
} else {
$inString = false;
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND, FormulaToken::TOKEN_SUBTYPE_TEXT);
$value = '';
}
} else {
$value .= $this->formula[$index];
}
++$index;
continue;
}
// single-quoted strings (links)
// embeds are double
// end does not mark a token
if ($inPath) {
if ($this->formula[$index] == self::QUOTE_SINGLE) {
if ((($index + 2) <= $formulaLength) && ($this->formula[$index + 1] == self::QUOTE_SINGLE)) {
$value .= self::QUOTE_SINGLE;
++$index;
} else {
$inPath = false;
}
} else {
$value .= $this->formula[$index];
}
++$index;
continue;
}
// bracked strings (R1C1 range index or linked workbook name)
// no embeds (changed to "()" by Excel)
// end does not mark a token
if ($inRange) {
if ($this->formula[$index] == self::BRACKET_CLOSE) {
$inRange = false;
}
$value .= $this->formula[$index];
++$index;
continue;
}
// error values
// end marks a token, determined from absolute list of values
if ($inError) {
$value .= $this->formula[$index];
++$index;
if (in_array($value, $ERRORS)) {
$inError = false;
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND, FormulaToken::TOKEN_SUBTYPE_ERROR);
$value = '';
}
continue;
}
// scientific notation check
if (strpos(self::OPERATORS_SN, $this->formula[$index]) !== false) {
if (strlen($value) > 1) {
if (preg_match('/^[1-9]{1}(\\.\\d+)?E{1}$/', $this->formula[$index]) != 0) {
$value .= $this->formula[$index];
++$index;
continue;
}
}
}
// independent character evaluation (order not important)
// establish state-dependent character evaluations
if ($this->formula[$index] == self::QUOTE_DOUBLE) {
if (strlen($value) > 0) {
// unexpected
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_UNKNOWN);
$value = '';
}
$inString = true;
++$index;
continue;
}
if ($this->formula[$index] == self::QUOTE_SINGLE) {
if (strlen($value) > 0) {
// unexpected
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_UNKNOWN);
$value = '';
}
$inPath = true;
++$index;
continue;
}
if ($this->formula[$index] == self::BRACKET_OPEN) {
$inRange = true;
$value .= self::BRACKET_OPEN;
++$index;
continue;
}
if ($this->formula[$index] == self::ERROR_START) {
if (strlen($value) > 0) {
// unexpected
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_UNKNOWN);
$value = '';
}
$inError = true;
$value .= self::ERROR_START;
++$index;
continue;
}
// mark start and end of arrays and array rows
if ($this->formula[$index] == self::BRACE_OPEN) {
if (strlen($value) > 0) {
// unexpected
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_UNKNOWN);
$value = '';
}
$tmp = new FormulaToken('ARRAY', FormulaToken::TOKEN_TYPE_FUNCTION, FormulaToken::TOKEN_SUBTYPE_START);
$tokens1[] = $tmp;
$stack[] = clone $tmp;
$tmp = new FormulaToken('ARRAYROW', FormulaToken::TOKEN_TYPE_FUNCTION, FormulaToken::TOKEN_SUBTYPE_START);
$tokens1[] = $tmp;
$stack[] = clone $tmp;
++$index;
continue;
}
if ($this->formula[$index] == self::SEMICOLON) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tmp = array_pop($stack);
$tmp->setValue('');
$tmp->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_STOP);
$tokens1[] = $tmp;
$tmp = new FormulaToken(',', FormulaToken::TOKEN_TYPE_ARGUMENT);
$tokens1[] = $tmp;
$tmp = new FormulaToken('ARRAYROW', FormulaToken::TOKEN_TYPE_FUNCTION, FormulaToken::TOKEN_SUBTYPE_START);
$tokens1[] = $tmp;
$stack[] = clone $tmp;
++$index;
continue;
}
if ($this->formula[$index] == self::BRACE_CLOSE) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tmp = array_pop($stack);
$tmp->setValue('');
$tmp->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_STOP);
$tokens1[] = $tmp;
$tmp = array_pop($stack);
$tmp->setValue('');
$tmp->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_STOP);
$tokens1[] = $tmp;
++$index;
continue;
}
// trim white-space
if ($this->formula[$index] == self::WHITESPACE) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tokens1[] = new FormulaToken('', FormulaToken::TOKEN_TYPE_WHITESPACE);
++$index;
while (($this->formula[$index] == self::WHITESPACE) && ($index < $formulaLength)) {
++$index;
}
continue;
}
// multi-character comparators
if (($index + 2) <= $formulaLength) {
if (in_array(substr($this->formula, $index, 2), $COMPARATORS_MULTI)) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tokens1[] = new FormulaToken(substr($this->formula, $index, 2), FormulaToken::TOKEN_TYPE_OPERATORINFIX, FormulaToken::TOKEN_SUBTYPE_LOGICAL);
$index += 2;
continue;
}
}
// standard infix operators
if (strpos(self::OPERATORS_INFIX, $this->formula[$index]) !== false) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tokens1[] = new FormulaToken($this->formula[$index], FormulaToken::TOKEN_TYPE_OPERATORINFIX);
++$index;
continue;
}
// standard postfix operators (only one)
if (strpos(self::OPERATORS_POSTFIX, $this->formula[$index]) !== false) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tokens1[] = new FormulaToken($this->formula[$index], FormulaToken::TOKEN_TYPE_OPERATORPOSTFIX);
++$index;
continue;
}
// start subexpression or function
if ($this->formula[$index] == self::PAREN_OPEN) {
if (strlen($value) > 0) {
$tmp = new FormulaToken($value, FormulaToken::TOKEN_TYPE_FUNCTION, FormulaToken::TOKEN_SUBTYPE_START);
$tokens1[] = $tmp;
$stack[] = clone $tmp;
$value = '';
} else {
$tmp = new FormulaToken('', FormulaToken::TOKEN_TYPE_SUBEXPRESSION, FormulaToken::TOKEN_SUBTYPE_START);
$tokens1[] = $tmp;
$stack[] = clone $tmp;
}
++$index;
continue;
}
// function, subexpression, or array parameters, or operand unions
if ($this->formula[$index] == self::COMMA) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tmp = array_pop($stack);
$tmp->setValue('');
$tmp->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_STOP);
$stack[] = $tmp;
if ($tmp->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) {
$tokens1[] = new FormulaToken(',', FormulaToken::TOKEN_TYPE_OPERATORINFIX, FormulaToken::TOKEN_SUBTYPE_UNION);
} else {
$tokens1[] = new FormulaToken(',', FormulaToken::TOKEN_TYPE_ARGUMENT);
}
++$index;
continue;
}
// stop subexpression
if ($this->formula[$index] == self::PAREN_CLOSE) {
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
$value = '';
}
$tmp = array_pop($stack);
$tmp->setValue('');
$tmp->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_STOP);
$tokens1[] = $tmp;
++$index;
continue;
}
// token accumulation
$value .= $this->formula[$index];
++$index;
}
// dump remaining accumulation
if (strlen($value) > 0) {
$tokens1[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERAND);
}
// move tokenList to new set, excluding unnecessary white-space tokens and converting necessary ones to intersections
$tokenCount = count($tokens1);
for ($i = 0; $i < $tokenCount; ++$i) {
$token = $tokens1[$i];
if (isset($tokens1[$i - 1])) {
$previousToken = $tokens1[$i - 1];
} else {
$previousToken = null;
}
if (isset($tokens1[$i + 1])) {
$nextToken = $tokens1[$i + 1];
} else {
$nextToken = null;
}
if ($token === null) {
continue;
}
if ($token->getTokenType() != FormulaToken::TOKEN_TYPE_WHITESPACE) {
$tokens2[] = $token;
continue;
}
if ($previousToken === null) {
continue;
}
if (
!(
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) && ($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_SUBEXPRESSION) && ($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERAND)
)
) {
continue;
}
if ($nextToken === null) {
continue;
}
if (
!(
(($nextToken->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) && ($nextToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_START)) ||
(($nextToken->getTokenType() == FormulaToken::TOKEN_TYPE_SUBEXPRESSION) && ($nextToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_START)) ||
($nextToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERAND)
)
) {
continue;
}
$tokens2[] = new FormulaToken($value, FormulaToken::TOKEN_TYPE_OPERATORINFIX, FormulaToken::TOKEN_SUBTYPE_INTERSECTION);
}
// move tokens to final list, switching infix "-" operators to prefix when appropriate, switching infix "+" operators
// to noop when appropriate, identifying operand and infix-operator subtypes, and pulling "@" from function names
$this->tokens = [];
$tokenCount = count($tokens2);
for ($i = 0; $i < $tokenCount; ++$i) {
$token = $tokens2[$i];
if (isset($tokens2[$i - 1])) {
$previousToken = $tokens2[$i - 1];
} else {
$previousToken = null;
}
//if (isset($tokens2[$i + 1])) {
// $nextToken = $tokens2[$i + 1];
//} else {
// $nextToken = null;
//}
if ($token === null) {
continue;
}
if ($token->getTokenType() == FormulaToken::TOKEN_TYPE_OPERATORINFIX && $token->getValue() == '-') {
if ($i == 0) {
$token->setTokenType(FormulaToken::TOKEN_TYPE_OPERATORPREFIX);
} elseif (
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) &&
($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_SUBEXPRESSION) &&
($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERATORPOSTFIX) ||
($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERAND)
) {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_MATH);
} else {
$token->setTokenType(FormulaToken::TOKEN_TYPE_OPERATORPREFIX);
}
$this->tokens[] = $token;
continue;
}
if ($token->getTokenType() == FormulaToken::TOKEN_TYPE_OPERATORINFIX && $token->getValue() == '+') {
if ($i == 0) {
continue;
} elseif (
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) &&
($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
(($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_SUBEXPRESSION) &&
($previousToken->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_STOP)) ||
($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERATORPOSTFIX) ||
($previousToken->getTokenType() == FormulaToken::TOKEN_TYPE_OPERAND)
) {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_MATH);
} else {
continue;
}
$this->tokens[] = $token;
continue;
}
if (
$token->getTokenType() == FormulaToken::TOKEN_TYPE_OPERATORINFIX &&
$token->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_NOTHING
) {
if (strpos('<>=', substr($token->getValue(), 0, 1)) !== false) {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_LOGICAL);
} elseif ($token->getValue() == '&') {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_CONCATENATION);
} else {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_MATH);
}
$this->tokens[] = $token;
continue;
}
if (
$token->getTokenType() == FormulaToken::TOKEN_TYPE_OPERAND &&
$token->getTokenSubType() == FormulaToken::TOKEN_SUBTYPE_NOTHING
) {
if (!is_numeric($token->getValue())) {
if (strtoupper($token->getValue()) == 'TRUE' || strtoupper($token->getValue()) == 'FALSE') {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_LOGICAL);
} else {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_RANGE);
}
} else {
$token->setTokenSubType(FormulaToken::TOKEN_SUBTYPE_NUMBER);
}
$this->tokens[] = $token;
continue;
}
if ($token->getTokenType() == FormulaToken::TOKEN_TYPE_FUNCTION) {
if (strlen($token->getValue()) > 0) {
if (substr($token->getValue(), 0, 1) == '@') {
$token->setValue(substr($token->getValue(), 1));
}
}
}
$this->tokens[] = $token;
}
}
}
Developer
The Kueue Pay Payment Gateway is an innovative technology that facilitates seamless and secure transactions between merchants and their customers. It enables businesses to accept debit and credit card payments both online and in physical stores.
The Kueue Pay Payment Gateway acts as a bridge between a merchant’s website or point-of-sale system and the payment processing network. It securely transmits payment information, authorizes transactions, and provides real-time status updates.
The Kueue Pay Developer API empowers developers and entrepreneurs to integrate the Kueue Pay Payment Gateway directly into their websites or applications. This streamlines the payment process for customers and provides businesses with a customizable and efficient payment solution.
To access the Kueue Pay Developer API, you need to sign up for a developer account on our platform. Once registered, you’ll receive an API key that you can use to authenticate your API requests.
The Kueue Pay Developer API allows you to initiate payments, check the status of payments, and process refunds. You can create a seamless payment experience for your customers while maintaining control over transaction management.
Yes, the Kueue Pay Developer API is designed to accommodate businesses of varying sizes and industries. Whether you’re a small online store or a large enterprise, our API can be tailored to fit your specific payment needs.
The Kueue Pay Developer API is designed with simplicity and ease of use in mind. Our comprehensive documentation, code samples, and developer support resources ensure a smooth integration process for any web platform.
We offer competitive pricing plans for using the Kueue Pay Payment Gateway and Developer API. Details about fees and pricing tiers can be found on our developer portal.
Absolutely, the Kueue Pay Developer API offers customization options that allow you to tailor the payment experience to match your brand and user interface. You can create a seamless and cohesive payment journey for your customers.
We provide dedicated developer support to assist you with any issues or questions you may have during the API integration process. Reach out to our support team at developersupport@NFCPay.com for prompt assistance.
Remember, our goal is to empower your business with a robust and efficient payment solution. If you have any additional questions or concerns, feel free to explore our developer portal or contact our support team.