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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Logical;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
class Conditional
{
use ArrayEnabled;
/**
* STATEMENT_IF.
*
* Returns one value if a condition you specify evaluates to TRUE and another value if it evaluates to FALSE.
*
* Excel Function:
* =IF(condition[,returnIfTrue[,returnIfFalse]])
*
* Condition is any value or expression that can be evaluated to TRUE or FALSE.
* For example, A10=100 is a logical expression; if the value in cell A10 is equal to 100,
* the expression evaluates to TRUE. Otherwise, the expression evaluates to FALSE.
* This argument can use any comparison calculation operator.
* ReturnIfTrue is the value that is returned if condition evaluates to TRUE.
* For example, if this argument is the text string "Within budget" and
* the condition argument evaluates to TRUE, then the IF function returns the text "Within budget"
* If condition is TRUE and ReturnIfTrue is blank, this argument returns 0 (zero).
* To display the word TRUE, use the logical value TRUE for this argument.
* ReturnIfTrue can be another formula.
* ReturnIfFalse is the value that is returned if condition evaluates to FALSE.
* For example, if this argument is the text string "Over budget" and the condition argument evaluates
* to FALSE, then the IF function returns the text "Over budget".
* If condition is FALSE and ReturnIfFalse is omitted, then the logical value FALSE is returned.
* If condition is FALSE and ReturnIfFalse is blank, then the value 0 (zero) is returned.
* ReturnIfFalse can be another formula.
*
* @param mixed $condition Condition to evaluate
* @param mixed $returnIfTrue Value to return when condition is true
* Note that this can be an array value
* @param mixed $returnIfFalse Optional value to return when condition is false
* Note that this can be an array value
*
* @return mixed The value of returnIfTrue or returnIfFalse determined by condition
*/
public static function statementIf($condition = true, $returnIfTrue = 0, $returnIfFalse = false)
{
$condition = ($condition === null) ? true : Functions::flattenSingleValue($condition);
if (ErrorValue::isError($condition)) {
return $condition;
}
$returnIfTrue = $returnIfTrue ?? 0;
$returnIfFalse = $returnIfFalse ?? false;
return ((bool) $condition) ? $returnIfTrue : $returnIfFalse;
}
/**
* STATEMENT_SWITCH.
*
* Returns corresponding with first match (any data type such as a string, numeric, date, etc).
*
* Excel Function:
* =SWITCH (expression, value1, result1, value2, result2, ... value_n, result_n [, default])
*
* Expression
* The expression to compare to a list of values.
* value1, value2, ... value_n
* A list of values that are compared to expression.
* The SWITCH function is looking for the first value that matches the expression.
* result1, result2, ... result_n
* A list of results. The SWITCH function returns the corresponding result when a value
* matches expression.
* Note that these can be array values to be returned
* default
* Optional. It is the default to return if expression does not match any of the values
* (value1, value2, ... value_n).
* Note that this can be an array value to be returned
*
* @param mixed $arguments Statement arguments
*
* @return mixed The value of matched expression
*/
public static function statementSwitch(...$arguments)
{
$result = ExcelError::VALUE();
if (count($arguments) > 0) {
$targetValue = Functions::flattenSingleValue($arguments[0]);
$argc = count($arguments) - 1;
$switchCount = floor($argc / 2);
$hasDefaultClause = $argc % 2 !== 0;
$defaultClause = $argc % 2 === 0 ? null : $arguments[$argc];
$switchSatisfied = false;
if ($switchCount > 0) {
for ($index = 0; $index < $switchCount; ++$index) {
if ($targetValue == $arguments[$index * 2 + 1]) {
$result = $arguments[$index * 2 + 2];
$switchSatisfied = true;
break;
}
}
}
if ($switchSatisfied !== true) {
$result = $hasDefaultClause ? $defaultClause : ExcelError::NA();
}
}
return $result;
}
/**
* IFERROR.
*
* Excel Function:
* =IFERROR(testValue,errorpart)
*
* @param mixed $testValue Value to check, is also the value returned when no error
* Or can be an array of values
* @param mixed $errorpart Value to return when testValue is an error condition
* Note that this can be an array value to be returned
*
* @return mixed The value of errorpart or testValue determined by error condition
* If an array of values is passed as the $testValue argument, then the returned result will also be
* an array with the same dimensions
*/
public static function IFERROR($testValue = '', $errorpart = '')
{
if (is_array($testValue)) {
return self::evaluateArrayArgumentsSubset([self::class, __FUNCTION__], 1, $testValue, $errorpart);
}
$errorpart = $errorpart ?? '';
return self::statementIf(ErrorValue::isError($testValue), $errorpart, $testValue);
}
/**
* IFNA.
*
* Excel Function:
* =IFNA(testValue,napart)
*
* @param mixed $testValue Value to check, is also the value returned when not an NA
* Or can be an array of values
* @param mixed $napart Value to return when testValue is an NA condition
* Note that this can be an array value to be returned
*
* @return mixed The value of errorpart or testValue determined by error condition
* If an array of values is passed as the $testValue argument, then the returned result will also be
* an array with the same dimensions
*/
public static function IFNA($testValue = '', $napart = '')
{
if (is_array($testValue)) {
return self::evaluateArrayArgumentsSubset([self::class, __FUNCTION__], 1, $testValue, $napart);
}
$napart = $napart ?? '';
return self::statementIf(ErrorValue::isNa($testValue), $napart, $testValue);
}
/**
* IFS.
*
* Excel Function:
* =IFS(testValue1;returnIfTrue1;testValue2;returnIfTrue2;...;testValue_n;returnIfTrue_n)
*
* testValue1 ... testValue_n
* Conditions to Evaluate
* returnIfTrue1 ... returnIfTrue_n
* Value returned if corresponding testValue (nth) was true
*
* @param mixed ...$arguments Statement arguments
* Note that this can be an array value to be returned
*
* @return mixed|string The value of returnIfTrue_n, if testValue_n was true. #N/A if none of testValues was true
*/
public static function IFS(...$arguments)
{
$argumentCount = count($arguments);
if ($argumentCount % 2 != 0) {
return ExcelError::NA();
}
// We use instance of Exception as a falseValue in order to prevent string collision with value in cell
$falseValueException = new Exception();
for ($i = 0; $i < $argumentCount; $i += 2) {
$testValue = ($arguments[$i] === null) ? '' : Functions::flattenSingleValue($arguments[$i]);
$returnIfTrue = ($arguments[$i + 1] === null) ? '' : $arguments[$i + 1];
$result = self::statementIf($testValue, $returnIfTrue, $falseValueException);
if ($result !== $falseValueException) {
return $result;
}
}
return ExcelError::NA();
}
}
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