assFormulaQuestionResult Class Reference

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V. More...

Collaboration diagram for assFormulaQuestionResult:

Public Member Functions
	__construct (private string $result, private ?string $range_min_txt, private ?string $range_max_txt, private float $tolerance, private ?assFormulaQuestionUnit $unit, private ?string $formula, private float $points, private int $precision, private bool $rating_simple=true, private ?float $rating_sign=null, private ?float $rating_value=null, private ?float $rating_unit=null, private float $result_type=0)
	substituteFormula (array $variables, array $results)
	calculateFormula ($variables, $results, $question_id=0, $use_precision=true)
	findValidRandomVariables ($variables, $results)
	suggestRange ($variables, $results)
	isCorrect ($variables, $results, $value, $unit=null)
	getReachedPoints (array $variables, array $results, string $answer_value, ?assFormulaQuestionUnit $answer_unit, array $units)
	getResultInfo ($variables, $results, $value, $unit, $units)
	setResult ($result)
	getResult ()
	setRangeMin (?string $range_min)
	getRangeMin ()
	getRangeMinBase ()
	setRangeMax (?string $range_max)
	getRangeMax ()
	getRangeMaxBase ()
	setTolerance ($tolerance)
	getTolerance ()
	setUnit (?assFormulaQuestionUnit $unit)
	getUnit ()
	setFormula (?string $formula)
	getFormula ()
	setPoints (float $points)
	getPoints ()
	setRatingSimple (bool $rating_simple)
	getRatingSimple ()
	setRatingSign (float $rating_sign)
	getRatingSign ()
	setRatingValue (float $rating_value)
	getRatingValue ()
	setRatingUnit (float $rating_unit)
	getRatingUnit ()
	setPrecision (float $precision)
	getPrecision ()
	setResultType (int $a_result_type)
	getResultType ()
	setRangeMaxTxt (string $range_max_txt)
	getRangeMaxTxt ()
	setRangeMinTxt (string $range_min_txt)
	getRangeMinTxt ()
	getAvailableResultUnits ($question_id)

Static Public Member Functions
static	getResultTypeByQstId ($a_qst_id, $a_result)
static	isCoprimeFraction ($numerator, $denominator)
static	convertDecimalToCoprimeFraction ($decimal_value, $tolerance=1.e-9)
static	getGreatestCommonDivisor ($a, $b)

Data Fields
const	RESULT_NO_SELECTION = 0
const	RESULT_DEC = 1
const	RESULT_FRAC = 2
const	RESULT_CO_FRAC = 3

Protected Member Functions
	isInTolerance ($user_answer, $expected, $tolerated_percentage)

Private Member Functions
	checkSign (float $v1, float $v2)
	calculateCorrectResult (array $variables, array $results)
	transformAnswerValueAccordingToType (string $value, ?assFormulaQuestionUnit $unit)

Private Attributes
ilGlobalTemplateInterface	$main_tpl
Refinery	$refinery
ilLanguage	$lng
	$available_units = []
float	$range_min = null
float	$range_max = null

Detailed Description

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V.

ILIAS is licensed with the GPL-3.0, see https://www.gnu.org/licenses/gpl-3.0.en.html You should have received a copy of said license along with the source code, too.

If this is not the case or you just want to try ILIAS, you'll find us at: https://www.ilias.de https://github.com/ILIAS-eLearning Formula Question Result

Author

Helmut Schottmüller helmu.nosp@m.t.sc.nosp@m.hottm.nosp@m.uell.nosp@m.er@ma.nosp@m.c.co.nosp@m.m

Version

Id

class.assFormulaQuestionResult.php 944 2009-11-09 16:11:30Z hschottm

\

Definition at line 27 of file class.assFormulaQuestionResult.php.

Constructor & Destructor Documentation

__construct()

assFormulaQuestionResult::__construct	(	private string	$result,
		private ?string	$range_min_txt,
		private ?string	$range_max_txt,
		private float	$tolerance,
		private ?assFormulaQuestionUnit	$unit,
		private ?string	$formula,
		private float	$points,
		private int	$precision,
		private bool	$rating_simple = true,
		private ?float	$rating_sign = null,
		private ?float	$rating_value = null,
		private ?float	$rating_unit = null,
		private float	$result_type = 0
	)

Definition at line 42 of file class.assFormulaQuestionResult.php.

References $DIC, ILIAS\Repository\lng(), null, ILIAS\Repository\refinery(), setRangeMax(), and setRangeMin().

      {
        global $DIC;
        $this->main_tpl = $DIC->ui()->mainTemplate();
        $this->refinery = $DIC->refinery();
        $this->lng = $DIC->language();
        $this->setRangeMin($range_min_txt);
        $this->setRangeMax($range_max_txt);

        if ($rating_sign === null) {
            $this->rating_sign = 33;
        }
        if ($rating_value === null) {
            $this->rating_value = 34;
        }
        if ($rating_unit === null) {
            $this->rating_unit = 33;
        }
    }

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Member Function Documentation

calculateCorrectResult()

assFormulaQuestionResult::calculateCorrectResult ( array  $variables, array  $results  )

private

Definition at line 461 of file class.assFormulaQuestionResult.php.

References calculateFormula().

Referenced by getReachedPoints().

                                                                             : float
    {
        return round(
            $this->calculateFormula($variables, $results),
            $this->precision
        );
    }

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calculateFormula()

assFormulaQuestionResult::calculateFormula	(		$variables,
			$results,
			$question_id = 0,
			$use_precision = true
	)

Definition at line 101 of file class.assFormulaQuestionResult.php.

References $res, $results, ilMath\_div(), getAvailableResultUnits(), getPrecision(), getResultType(), getUnit(), null, and substituteFormula().

Referenced by calculateCorrectResult().

    {
        $resultunits = [];
        if ($question_id > 0) {
            $resultunits = $this->getAvailableResultUnits($question_id);
        }

        $formula = $this->substituteFormula($variables, $results);
        if (preg_match_all("/(\\\$v\\d+)/ims", $formula, $matches)) {
            foreach ($matches[1] as $variable) {
                $varObj = $variables[$variable];
                if (!is_object($varObj) || !is_numeric($varObj->getValue())) {
                    continue;
                }
                $value = $varObj->getBaseValue();
                $formula = preg_replace("/\\\$" . substr($variable, 1) . "(?![0-9]+)/", "(" . $value . ")" . "\\1", $formula);
            }
        }
        $math = new EvalMath();
        $math->suppress_errors = true;

        $formula = str_replace(",", ".", $formula);
        $result = $math->evaluate($formula);
        if ($this->getUnit() !== null) {
            $result = ilMath::_div($result, $this->getUnit()->getFactor(), 100);
        }

        // @todo DON'T USE ilMath::_mul() ... bcmul() returns wrong result !!!!

        if ($use_precision == true) {
            $res = $result * 1;
            if (is_numeric($this->getPrecision())) {
                if ($this->getResultType() == self::RESULT_DEC || $this->getResultType() == self::RESULT_NO_SELECTION) {
                    $result = ilMath::_round($res, $this->getPrecision());
                }
            }
        }
        return $result;
    }

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checkSign()

assFormulaQuestionResult::checkSign ( float  $v1, float  $v2  )

private

Definition at line 409 of file class.assFormulaQuestionResult.php.

Referenced by getReachedPoints(), and getResultInfo().

                                                    : bool
    {
        return ($v1 >= 0.0 && $v2 >= 0.0) || ($v1 <= 0.0 && $v2 <= 0.0);
    }

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convertDecimalToCoprimeFraction()

static assFormulaQuestionResult::convertDecimalToCoprimeFraction (   $decimal_value,   $tolerance = 1.e-9  )

static

Definition at line 773 of file class.assFormulaQuestionResult.php.

References Vendor\Package\$a, and Vendor\Package\$b.

Referenced by assFormulaQuestion\getBestSolution(), and assFormulaQuestion\substituteVariables().

    {
        if (empty($decimal_value)) {
            return '';
        }

        $to_string = (string) $decimal_value;
        $is_negative = strpos($to_string, '-') === 0;
        if ($is_negative) {
            $decimal_value = substr($decimal_value, 1);
        }
        $h1 = 1;
        $h2 = 0;
        $k1 = 0;
        $k2 = 1;
        $b = 1 / $decimal_value;
        do {
            $b = 1 / $b;
            $a = floor($b);
            $aux = $h1;
            $h1 = $a * $h1 + $h2;
            $h2 = $aux;
            $aux = $k1;
            $k1 = $a * $k1 + $k2;
            $k2 = $aux;
            $b = $b - $a;
        } while ((abs($decimal_value - $h1 / $k1) > $decimal_value * $tolerance) || ($k1 < 0 || $b < 0));
        if ($k1 == 1) {
            $result = $h1;
            $checkResult = $h1;
        } else {
            $result = "$h1/$k1";
            $checkResult = ($h1 / $k1);
        }
        if ($is_negative) {
            $result = '-' . $result;
            $checkResult = ($h1 / $k1) * -1;
        }
        if ($to_string == $checkResult . '' || $checkResult . '' == $result) {
            return $result;
        } else {
            return [$to_string,$result];
        }
    }

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findValidRandomVariables()

assFormulaQuestionResult::findValidRandomVariables	(		$variables,
			$results
	)

Definition at line 141 of file class.assFormulaQuestionResult.php.

References $results, getRangeMax(), getRangeMaxBase(), getRangeMin(), getRangeMinBase(), and substituteFormula().

                                                                  : void
    {
        $i = 0;
        $inRange = false;
        while ($i < 1000 && !$inRange) {
            $formula = $this->substituteFormula($variables, $results);
            if (preg_match_all("/(\\\$v\\d+)/ims", $formula, $matches)) {
                foreach ($matches[1] as $variable) {
                    $varObj = $variables[$variable];
                    if (!is_object($varObj)) {
                        continue;
                    }
                    $varObj->setRandomValue();
                    $formula = preg_replace("/\\\$" . substr($variable, 1) . "(?![0-9]+)/", "(" . $varObj->getBaseValue() . ")" . "\\1", $formula);
                }
            }
            $math = new EvalMath();
            $math->suppress_errors = true;
            $result = $math->evaluate($formula);
            $inRange = (is_numeric($result)) ? true : false;
            if ($inRange) {
                if (is_numeric($this->getRangeMin())) {
                    if ($result < $this->getRangeMinBase()) {
                        $inRange = false;
                    }
                }
                if (is_numeric($this->getRangeMax())) {
                    if ($result > $this->getRangeMaxBase()) {
                        $inRange = false;
                    }
                }
            }
            $i++;
        }
    }

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getAvailableResultUnits()

assFormulaQuestionResult::getAvailableResultUnits

(

$question_id

)

Definition at line 828 of file class.assFormulaQuestionResult.php.

References $available_units, $DIC, $ilDB, and $res.

Referenced by calculateFormula().

                                                         : array
    {
        global $DIC;
        $ilDB = $DIC['ilDB'];

        $res = $ilDB->queryF(
            '
                        SELECT * FROM il_qpl_qst_fq_res_unit
                        WHERE question_fi = %s
                        ORDER BY result',
            ['integer'],
            [$question_id]
        );


        while ($row = $ilDB->fetchAssoc($res)) {
            $this->available_units[$row['result']][] = $row['unit_fi'] ;
        }

        return $this->available_units;
    }

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getFormula()

assFormulaQuestionResult::getFormula

(

)

Definition at line 651 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), and substituteFormula().

                                : ?string
    {
        return $this->formula;
    }

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getGreatestCommonDivisor()

static assFormulaQuestionResult::getGreatestCommonDivisor (   $a,   $b  )

static

Definition at line 818 of file class.assFormulaQuestionResult.php.

References Vendor\Package\$a, and Vendor\Package\$b.

    {
        if ($b > 0) {
            return self::getGreatestCommonDivisor($b, $a % $b);
        } else {
            return $a;
        }
    }

getPoints()

assFormulaQuestionResult::getPoints

(

)

Definition at line 661 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), getReachedPoints(), and getResultInfo().

                               : float
    {
        return $this->points;
    }

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getPrecision()

assFormulaQuestionResult::getPrecision

(

)

Definition at line 711 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), calculateFormula(), isCorrect(), isInTolerance(), suggestRange(), and transformAnswerValueAccordingToType().

                                  : int
    {
        return $this->precision;
    }

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getRangeMax()

assFormulaQuestionResult::getRangeMax

(

)

Definition at line 612 of file class.assFormulaQuestionResult.php.

References $range_max.

Referenced by findValidRandomVariables(), and getRangeMaxBase().

                                 : ?float
    {
        return $this->range_max;
    }

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getRangeMaxBase()

assFormulaQuestionResult::getRangeMaxBase

(

)

Definition at line 617 of file class.assFormulaQuestionResult.php.

References ilMath\_mul(), getRangeMax(), getUnit(), and null.

Referenced by findValidRandomVariables().

    {
        if ($this->getUnit() !== null) {
            return ilMath::_mul($this->getRangeMax(), $this->getUnit()->getFactor(), 100);
        }

        return $this->getRangeMax();
    }

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getRangeMaxTxt()

assFormulaQuestionResult::getRangeMaxTxt

(

)

Definition at line 731 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog().

                                    : string
    {
        return $this->range_max_txt;
    }

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getRangeMin()

assFormulaQuestionResult::getRangeMin

(

)

Definition at line 587 of file class.assFormulaQuestionResult.php.

References $range_min.

Referenced by findValidRandomVariables(), and getRangeMinBase().

                                 : ?float
    {
        return $this->range_min;
    }

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getRangeMinBase()

assFormulaQuestionResult::getRangeMinBase

(

)

Definition at line 592 of file class.assFormulaQuestionResult.php.

References ilMath\_mul(), getRangeMin(), getUnit(), and null.

Referenced by findValidRandomVariables().

    {
        if ($this->getUnit() !== null) {
            return ilMath::_mul($this->getRangeMin(), $this->getUnit()->getFactor(), 100);
        }

        return $this->getRangeMin();
    }

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getRangeMinTxt()

assFormulaQuestionResult::getRangeMinTxt

(

)

Definition at line 741 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog().

                                    : string
    {
        return $this->range_min_txt;
    }

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getRatingSign()

assFormulaQuestionResult::getRatingSign

(

)

Definition at line 681 of file class.assFormulaQuestionResult.php.

Referenced by getReachedPoints(), and getResultInfo().

                                   : float
    {
        return $this->rating_sign;
    }

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getRatingSimple()

assFormulaQuestionResult::getRatingSimple

(

)

Definition at line 671 of file class.assFormulaQuestionResult.php.

Referenced by getReachedPoints(), and getResultInfo().

                                     : bool
    {
        return $this->rating_simple;
    }

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getRatingUnit()

assFormulaQuestionResult::getRatingUnit

(

)

Definition at line 701 of file class.assFormulaQuestionResult.php.

Referenced by getReachedPoints(), and getResultInfo().

                                   : float
    {
        return $this->rating_unit;
    }

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getRatingValue()

assFormulaQuestionResult::getRatingValue

(

)

Definition at line 691 of file class.assFormulaQuestionResult.php.

Referenced by getReachedPoints(), and getResultInfo().

                                    : float
    {
        return $this->rating_value;
    }

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getReachedPoints()

assFormulaQuestionResult::getReachedPoints	(	array	$variables,
		array	$results,
		string	$answer_value,
		?assFormulaQuestionUnit	$answer_unit,
		array	$units
	)

Parameters

assFormulaQuestionUnit[]

$units

Definition at line 417 of file class.assFormulaQuestionResult.php.

References ilMath\_div(), ilMath\_mul(), calculateCorrectResult(), checkSign(), assFormulaQuestionUnit\getBaseUnit(), getPoints(), getRatingSign(), getRatingSimple(), getRatingUnit(), getRatingValue(), getTolerance(), isCorrect(), isInTolerance(), null, and transformAnswerValueAccordingToType().

     : float {
        if ($this->getRatingSimple()) {
            return $this->isCorrect($variables, $results, $answer_value, $answer_unit)
            ? $this->getPoints()
            : 0.0;
        }

        $result = $this->calculateCorrectResult($variables, $results);
        $float_value = $this->transformAnswerValueAccordingToType($answer_value, $answer_unit);

        $points = 0.0;
        if ($answer_unit instanceof assFormulaQuestionUnit && $answer_unit instanceof assFormulaQuestionUnit) {
            $base1 = $units[$answer_unit->getBaseUnit()] ?? null;
            $base2 = $units[$answer_unit->getBaseUnit()] ?? null;
            if (
                $base1 instanceof assFormulaQuestionUnit
                && $base2 instanceof assFormulaQuestionUnit
                && $base1->getId() === $base2->getId()
            ) {
                $points += ilMath::_mul($this->getPoints(), ilMath::_div($this->getRatingUnit(), 100));
            }
        }

        if ($float_value === null) {
            return $points;
        }

        if ($this->checkSign($result, $float_value)) {
            $points += ilMath::_mul($this->getPoints(), ilMath::_div($this->getRatingSign(), 100));
        }

        if ($this->isInTolerance(abs($float_value), abs($result), $this->getTolerance())) {
            $points += ilMath::_mul($this->getPoints(), ilMath::_div($this->getRatingValue(), 100));
        }

        return $points;
    }

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getResult()

assFormulaQuestionResult::getResult

(

)

Definition at line 571 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\addResult(), assFormulaQuestion\addResultUnit(), assFormulaQuestion\addResultUnits(), assFormulaQuestion\buildResultsForLog(), assFormulaQuestion\getResultUnits(), assFormulaQuestion\hasResultUnit(), assFormulaQuestionGUI\resetSavedPreviewSession(), and substituteFormula().

                               : string
    {
        return $this->result;
    }

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getResultInfo()

assFormulaQuestionResult::getResultInfo	(		$variables,
			$results,
			$value,
			$unit,
			$units
	)

Definition at line 507 of file class.assFormulaQuestionResult.php.

References $results, ilMath\_mul(), checkSign(), getPoints(), getRatingSign(), getRatingSimple(), getRatingUnit(), getRatingValue(), getTolerance(), getUnit(), isCorrect(), isInTolerance(), null, and substituteFormula().

                                                                              : array
    {
        if ($this->getRatingSimple()) {
            if ($this->isCorrect($variables, $results, $value, $units[$unit] ?? null)) {
                return ["points" => $this->getPoints()];
            } else {
                return ["points" => 0];
            }
        } else {
            $totalpoints = 0;
            $formula = $this->substituteFormula($variables, $results);
            if (preg_match_all("/(\\\$v\\d+)/ims", $formula, $matches)) {
                foreach ($matches[1] as $variable) {
                    $varObj = $variables[$variable];
                    $formula = preg_replace("/\\\$" . substr($variable, 1) . "(?![0-9]+)/", "(" . $varObj->getBaseValue() . ")" . "\\1", $formula);
                }
            }
            $math = new EvalMath();
            $math->suppress_errors = true;
            $result = $math->evaluate($formula);
            if ($this->getUnit() !== null) {
                $result = ilMath::_mul($result, $this->getUnit()->getFactor(), 100);
            }
            if (is_object($unit)) {
                $value = ilMath::_mul($value, $unit->getFactor(), 100);
            } else {
            }
            $details = [];
            if ($this->checkSign($result, $value)) {
                $points = ilMath::_mul($this->getPoints(), $this->getRatingSign() / 100);
                $totalpoints += $points;
                $details['sign'] = $points;
            }
            if ($this->isInTolerance(abs($value), abs($result), $this->getTolerance())) {
                $points = ilMath::_mul($this->getPoints(), $this->getRatingValue() / 100);
                $totalpoints += $points;
                $details['value'] = $points;
            }
            if ($this->getUnit() !== null) {
                $base1 = $units[$unit];
                if (is_object($base1)) {
                    $base1 = $units[$base1->getBaseUnit()];
                }
                $base2 = $units[$this->getUnit()->getBaseUnit()];
                if (is_object($base1) && is_object($base2) && $base1->getId() == $base2->getId()) {
                    $points = ilMath::_mul($this->getPoints(), $this->getRatingUnit() / 100);
                    $totalpoints += $points;
                    $details['unit'] = $points;
                }
            }
            $details['points'] = $totalpoints;
            return $details;
        }
    }

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getResultType()

assFormulaQuestionResult::getResultType

(

)

Definition at line 721 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), calculateFormula(), isCorrect(), and transformAnswerValueAccordingToType().

                                   : int
    {
        return (int) $this->result_type;
    }

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getResultTypeByQstId()

static assFormulaQuestionResult::getResultTypeByQstId (   $a_qst_id,   $a_result  )

static

Definition at line 746 of file class.assFormulaQuestionResult.php.

References $DIC, $ilDB, and $res.

Referenced by assFormulaQuestionGUI\getPreview(), and assFormulaQuestionGUI\getTestOutput().

    {
        global $DIC;
        $ilDB = $DIC['ilDB'];

        $res = $ilDB->queryF(
            '
                        SELECT result_type
                        FROM il_qpl_qst_fq_res
                        WHERE question_fi = %s
                        AND result = %s',
            ['integer', 'text'],
            [$a_qst_id, $a_result]
        );

        $row = $ilDB->fetchAssoc($res);

        return $row['result_type'];
    }

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getTolerance()

assFormulaQuestionResult::getTolerance

(

)

Definition at line 631 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), getReachedPoints(), getResultInfo(), and isCorrect().

                                  : float
    {
        return $this->tolerance;
    }

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getUnit()

assFormulaQuestionResult::getUnit

(

)

Definition at line 641 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\buildResultsForLog(), calculateFormula(), getRangeMaxBase(), getRangeMinBase(), getResultInfo(), isCorrect(), and suggestRange().

                             : ?assFormulaQuestionUnit
    {
        return $this->unit;
    }

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isCoprimeFraction()

static assFormulaQuestionResult::isCoprimeFraction (   $numerator,   $denominator  )

static

Definition at line 766 of file class.assFormulaQuestionResult.php.

                                                                      : bool
    {
        $gcd = self::getGreatestCommonDivisor(abs($numerator), abs($denominator));

        return $gcd == 1 ? true : false;
    }

isCorrect()

assFormulaQuestionResult::isCorrect	(		$variables,
			$results,
			$value,
			$unit = null
	)

Parameters

	$variables	array formula variables containing units
	$results	array formula results containing units
	$value	string user input value
null	$unit	user input unit

Returns

bool

Definition at line 219 of file class.assFormulaQuestionResult.php.

References $results, ilMath\_div(), ilMath\_mul(), getPrecision(), getResultType(), getTolerance(), getUnit(), isInTolerance(), null, RESULT_CO_FRAC, RESULT_DEC, RESULT_FRAC, RESULT_NO_SELECTION, and substituteFormula().

Referenced by getReachedPoints(), and getResultInfo().

                                                                         : bool
    {
        // The user did not answer the question ....
        if ($value === null || 0 == strlen($value)) {
            return false;
        }
        $value = str_replace(' ', '', $value);

        $formula = $this->substituteFormula($variables, $results);

        $check_valid_chars = true;

        if (preg_match_all("/(\\\$v\\d+)/ims", $formula, $matches)) {
            foreach ($matches[1] as $variable) {
                $varObj = $variables[$variable];
                if (!is_object($varObj) || !is_numeric($varObj->getValue())) {
                    continue;
                }

                if ($varObj->getUnit() != null) {
                    //convert unit and value to baseunit.... because vars could have different units
                    if ($varObj->getUnit()->getBaseUnit() != -1) {
                        $tmp_value = $varObj->getValue() * $varObj->getUnit()->getFactor();
                    } else {
                        $tmp_value = $varObj->getValue();
                    }
                } else {
                    $tmp_value = $varObj->getValue();
                }

                $formula = preg_replace("/\\\$" . substr($variable, 1) . "(?![0-9]+)/", "(" . $tmp_value . ")" . "\\1", $formula);
            }
        }

        $math = new EvalMath();
        $math->suppress_errors = true;
        $result = $math->evaluate($formula); // baseunit-result!!
        $resultWithRespectedUnit = $result;

        if ($this->getUnit() !== null) {
            //there is a "fix" result_unit defined!

            // if expected resultunit != baseunit convert to "fix" result_unit
            if ($this->getUnit()->getBaseUnit() != -1) {
                $resultWithRespectedUnit = ilMath::_div($result, $this->getUnit()->getFactor());
            }
        } elseif ($this->getUnit() == null && $unit != null) {
            // there is no "fix" result_unit defined, but the user has selected a unit ...
            // so .... there are "available resultunits" in multi-selectbox selected
            // -> check if selected user-unit is baseunit
            if ($unit->getFactor() != 1 && strlen(trim($unit->getFactor())) != 1) {
                // result is already calculated to baseunit.... -> get correct precision..
                $resultWithRespectedUnit = ilMath::_div($result, $unit->getFactor());
            }
        }

        $result = substr($result, 0, strlen($resultWithRespectedUnit));

        //      check for valid chars ("0-9",",|.|/","0-9","e|E","+|-","0-9")
        $has_valid_chars = preg_match("/^-?([0-9]*)(,|\\.|\\/){0,1}([0-9]*)([eE][\\+|-]([0-9])+)?$/", $value, $matches);
        if (!$has_valid_chars) {
            $check_valid_chars = false;
        } elseif (
            (isset($matches[2]) && $matches[2] == '/') &&
            (isset($matches[4]) && strtolower($matches[4]) == "e") &&
            (!isset($matches[1]) || !strlen($matches[1]) || !isset($matches[3]) || !strlen($matches[3]) || $matches[3] == 0)) {
            $check_valid_chars = false;
        }

        // result_type extension
        switch ($this->getResultType()) {
            case assFormulaQuestionResult::RESULT_DEC:
                if (substr_count($value, '.') == 1 || substr_count($value, ',') == 1) {
                    $exp_val = $value;
                    $frac_value = str_replace(',', '.', $exp_val);
                } else {
                    $frac_value = $value;
                }

                if (substr_count($value, '/') >= 1) {
                    $check_fraction = false;
                } else {
                    $check_fraction = true;
                }
                break;

            case assFormulaQuestionResult::RESULT_FRAC:
            case assFormulaQuestionResult::RESULT_CO_FRAC:
                $exp_val = explode('/', $value);
                if (count($exp_val) == 1) {
                    $frac_value = ilMath::_div($exp_val[0], 1);

                    if (ilMath::_equals($frac_value, $resultWithRespectedUnit, $this->getPrecision())) {
                        $check_fraction = true;
                    } else {
                        $check_fraction = false;
                    }
                } else {
                    try {
                        $frac_value = ilMath::_div($exp_val[0], $exp_val[1]);
                    } catch (ilMathDivisionByZeroException $ex) {
                        if ($result) {
                            return false;
                        } else {
                            return true;
                        }
                    }
                    $frac_value = str_replace(',', '.', $frac_value);

                    if (ilMath::_equals($frac_value, $resultWithRespectedUnit, $this->getPrecision())) {
                        $check_fraction = true;
                    }

                    if ($this->getResultType() == assFormulaQuestionResult::RESULT_CO_FRAC) {
                        if (!self::isCoprimeFraction($exp_val[0], $exp_val[1])) {
                            $check_fraction = false;
                        }
                    }
                }

                if (substr_count($value, '.') >= 1 || substr_count($value, ',') >= 1) {
                    $check_fraction = false;
                }
                break;

            case assFormulaQuestionResult::RESULT_NO_SELECTION:
            default:
                if (substr_count($value, '.') == 1 || substr_count($value, ',') == 1) {
                    $frac_value = str_replace(',', '.', $value);
                } elseif (substr_count($value, '/') == 1) {
                    $exp_val = explode('/', $value);
                    try {
                        $frac_value = ilMath::_div($exp_val[0], $exp_val[1]);
                    } catch (ilMathDivisionByZeroException $ex) {
                        if ($result) {
                            return false;
                        } else {
                            return true;
                        }
                    }
                } else {
                    $frac_value = $value;
                }

                $check_fraction = true;
                break;
        }

        if (is_object($unit)) {
            if (isset($frac_value)) {
                $value = ilMath::_mul($frac_value, $unit->getFactor(), 100);
            }
        }

        $frac_value = ilMath::_round($frac_value, $this->getPrecision());
        $resultWithRespectedUnit = ilMath::_round($resultWithRespectedUnit, $this->getPrecision());

        $checkvalue = false;
        if (isset($frac_value)) {
            if ($this->isInTolerance($frac_value, $resultWithRespectedUnit, $this->getTolerance())) {
                $checkvalue = true;
            }
        } else {
            if ($this->isInTolerance($value, $resultWithRespectedUnit, $this->getTolerance())) {
                $checkvalue = true;
            }
        }

        $checkunit = true;
        if ($this->getUnit() !== null) {
            if (is_object($unit)) {
                if ($unit->getId() != $this->getUnit()->getId()) {
                    $checkunit = false;
                }
            }
        }
        return $checkvalue && $checkunit && $check_fraction && $check_valid_chars;
    }

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isInTolerance()

assFormulaQuestionResult::isInTolerance (   $user_answer,   $expected,   $tolerated_percentage  )

protected

Definition at line 398 of file class.assFormulaQuestionResult.php.

References ilMath\_add(), ilMath\_div(), ilMath\_mul(), ilMath\_sub(), and getPrecision().

Referenced by getReachedPoints(), getResultInfo(), and isCorrect().

                                                                                    : bool
    {
        $user_answer = ilMath::_mul($user_answer, 1, $this->getPrecision());
        $tolerance_abs = abs(ilMath::_div(ilMath::_mul($tolerated_percentage, $expected, 100), 100));
        $lower_boundary = ilMath::_sub($expected, $tolerance_abs);
        $upper_boundary = ilMath::_add($expected, $tolerance_abs);

        return $lower_boundary <= $user_answer
            && $user_answer <= $upper_boundary;
    }

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setFormula()

assFormulaQuestionResult::setFormula

(

?string

$formula

)

Definition at line 646 of file class.assFormulaQuestionResult.php.

                                                : void
    {
        $this->formula = $formula;
    }

setPoints()

assFormulaQuestionResult::setPoints

(

float

$points

)

Definition at line 656 of file class.assFormulaQuestionResult.php.

                                            : void
    {
        $this->points = $points;
    }

setPrecision()

assFormulaQuestionResult::setPrecision

(

float

$precision

)

Definition at line 706 of file class.assFormulaQuestionResult.php.

                                                  : void
    {
        $this->precision = $precision;
    }

setRangeMax()

assFormulaQuestionResult::setRangeMax

(

?string

$range_max

)

Definition at line 601 of file class.assFormulaQuestionResult.php.

References null.

Referenced by __construct(), and suggestRange().

                                                   : void
    {
        if ($range_max === null) {
            return;
        }

        $math = new EvalMath();
        $math->suppress_errors = true;
        $this->range_max = (float) $math->evaluate($range_max);
    }

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setRangeMaxTxt()

assFormulaQuestionResult::setRangeMaxTxt

(

string

$range_max_txt

)

Definition at line 726 of file class.assFormulaQuestionResult.php.

                                                         : void
    {
        $this->range_max_txt = $range_max_txt;
    }

setRangeMin()

assFormulaQuestionResult::setRangeMin

(

?string

$range_min

)

Definition at line 576 of file class.assFormulaQuestionResult.php.

References null.

Referenced by __construct(), and suggestRange().

                                                   : void
    {
        if ($range_min === null) {
            return;
        }

        $math = new EvalMath();
        $math->suppress_errors = true;
        $this->range_min = (float) $math->evaluate($range_min);
    }

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setRangeMinTxt()

assFormulaQuestionResult::setRangeMinTxt

(

string

$range_min_txt

)

Definition at line 736 of file class.assFormulaQuestionResult.php.

                                                         : void
    {
        $this->range_min_txt = $range_min_txt;
    }

setRatingSign()

assFormulaQuestionResult::setRatingSign

(

float

$rating_sign

)

Definition at line 676 of file class.assFormulaQuestionResult.php.

                                                     : void
    {
        $this->rating_sign = $rating_sign;
    }

setRatingSimple()

assFormulaQuestionResult::setRatingSimple

(

bool

$rating_simple

)

Definition at line 666 of file class.assFormulaQuestionResult.php.

                                                        : void
    {
        $this->rating_simple = $rating_simple;
    }

setRatingUnit()

assFormulaQuestionResult::setRatingUnit

(

float

$rating_unit

)

Definition at line 696 of file class.assFormulaQuestionResult.php.

                                                     : void
    {
        $this->rating_unit = $rating_unit;
    }

setRatingValue()

assFormulaQuestionResult::setRatingValue

(

float

$rating_value

)

Definition at line 686 of file class.assFormulaQuestionResult.php.

                                                       : void
    {
        $this->rating_value = $rating_value;
    }

setResult()

assFormulaQuestionResult::setResult

(

$result

)

Definition at line 566 of file class.assFormulaQuestionResult.php.

                                      : void
    {
        $this->result = $result;
    }

setResultType()

assFormulaQuestionResult::setResultType

(

int

$a_result_type

)

Definition at line 716 of file class.assFormulaQuestionResult.php.

                                                     : void
    {
        $this->result_type = $a_result_type;
    }

setTolerance()

assFormulaQuestionResult::setTolerance

(

$tolerance

)

Definition at line 626 of file class.assFormulaQuestionResult.php.

                                            : void
    {
        $this->tolerance = $tolerance;
    }

setUnit()

assFormulaQuestionResult::setUnit

(

?assFormulaQuestionUnit

$unit

)

Definition at line 636 of file class.assFormulaQuestionResult.php.

                                                          : void
    {
        $this->unit = $unit;
    }

substituteFormula()

assFormulaQuestionResult::substituteFormula	(	array	$variables,
		array	$results
	)

Definition at line 75 of file class.assFormulaQuestionResult.php.

References getFormula(), getResult(), and ILIAS\Repository\lng().

Referenced by calculateFormula(), findValidRandomVariables(), getResultInfo(), isCorrect(), and suggestRange().

                                                                       : false|string
    {
        $formula = $this->getFormula();
        preg_match_all('/\$r\d+/mi', $formula, $matches);

        foreach ($matches[0] as $result) {
            if ($result === $this->getResult()) {
                $this->main_tpl->setOnScreenMessage('failure', $this->lng->txt('errRecursionInResult'));
                return false;
            }

            if (!isset($results[$result]) || !$results[$result] instanceof self) {
                $this->main_tpl->setOnScreenMessage('failure', $this->lng->txt('errFormulaQuestion'));
                return false;
            }

            $formula = preg_replace(
                '/\\' . $result . '(?!\d)/m',
                $results[$result]->substituteFormula($variables, $results),
                $formula,
            );
        }

        return "({$formula})";
    }

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suggestRange()

assFormulaQuestionResult::suggestRange	(		$variables,
			$results
	)

Definition at line 177 of file class.assFormulaQuestionResult.php.

References $results, ilMath\_div(), ilMath\_mul(), getPrecision(), getUnit(), null, setRangeMax(), setRangeMin(), and substituteFormula().

                                                      : void
    {
        //              @todo Check this
        $range_min = null;
        $range_max = null;
        for ($i = 0; $i < 1000; $i++) {
            $formula = $this->substituteFormula($variables, $results);
            if (preg_match_all("/(\\\$v\\d+)/ims", $formula, $matches)) {
                foreach ($matches[1] as $variable) {
                    $varObj = $variables[$variable];
                    if (!is_object($varObj)) {
                        continue;
                    }
                    $varObj->setRandomValue();
                    $formula = preg_replace("/\\\$" . substr($variable, 1) . "(?![0-9]+)/", "(" . $varObj->getBaseValue() . ")" . "\\1", $formula);
                }
            }
            $math = new EvalMath();
            $math->suppress_errors = true;
            $result = $math->evaluate($formula);
            if (($range_min == null) || ($result < $range_min)) {
                $range_min = $result;
            }
            if (($range_max == null) || ($result > $range_max)) {
                $range_max = $result;
            }
        }
        if ($this->getUnit() !== null) {
            $range_min = ilMath::_div($range_min, $this->getUnit()->getFactor());
            $range_max = ilMath::_div($range_max, $this->getUnit()->getFactor());
        }
        $this->setRangeMin(ilMath::_mul($range_min, 1, $this->getPrecision()));
        $this->setRangeMax(ilMath::_mul($range_max, 1, $this->getPrecision()));
    }

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transformAnswerValueAccordingToType()

assFormulaQuestionResult::transformAnswerValueAccordingToType ( string  $value, ?assFormulaQuestionUnit  $unit  )

private

Definition at line 469 of file class.assFormulaQuestionResult.php.

References ilMath\_div(), getPrecision(), getResultType(), null, ILIAS\Repository\refinery(), and ILIAS\Refinery\transform().

Referenced by getReachedPoints().

     : ?float {
        switch ($this->getResultType()) {
            case self::RESULT_DEC:
                break;
            case self::RESULT_FRAC:
            case self::RESULT_CO_FRAC:
                $exp_val = explode('/', $value);
                $value = ilMath::_div(
                    $exp_val[0],
                    count($exp_val) === 1 ? 1 : $exp_val[1],
                    $this->getPrecision()
                );
                break;
            case self::RESULT_NO_SELECTION:
            default:
                $exp_val = explode('/', $value);

                if (count($exp_val) === 2
                    && (float) $exp_val[1] === 0.0) {
                    return null;
                }

                $value = ilMath::_div(
                    $exp_val[0],
                    count($exp_val) === 1 ? 1 : $exp_val[1],
                    100
                );
        }

        return $this->refinery->byTrying([
            $this->refinery->kindlyTo()->float(),
            $this->refinery->always(null),
        ])->transform(round($value, $this->precision));
    }

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Field Documentation

$available_units

assFormulaQuestionResult::$available_units = []

private

Definition at line 38 of file class.assFormulaQuestionResult.php.

Referenced by getAvailableResultUnits().

$lng

ilLanguage assFormulaQuestionResult::$lng

private

Definition at line 36 of file class.assFormulaQuestionResult.php.

$main_tpl

ilGlobalTemplateInterface assFormulaQuestionResult::$main_tpl

private

Definition at line 34 of file class.assFormulaQuestionResult.php.

$range_max

float assFormulaQuestionResult::$range_max = null

private

Definition at line 40 of file class.assFormulaQuestionResult.php.

Referenced by getRangeMax().

$range_min

float assFormulaQuestionResult::$range_min = null

private

Definition at line 39 of file class.assFormulaQuestionResult.php.

Referenced by getRangeMin().

$refinery

Refinery assFormulaQuestionResult::$refinery

private

Definition at line 35 of file class.assFormulaQuestionResult.php.

RESULT_CO_FRAC

const assFormulaQuestionResult::RESULT_CO_FRAC = 3

Definition at line 32 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\getBestSolution(), isCorrect(), assFormulaQuestionTest\simpleRatedCalculationsData(), and assFormulaQuestion\substituteVariables().

RESULT_DEC

const assFormulaQuestionResult::RESULT_DEC = 1

Definition at line 30 of file class.assFormulaQuestionResult.php.

Referenced by isCorrect(), assFormulaQuestionTest\simpleRatedCalculationsData(), and assFormulaQuestion\substituteVariables().

RESULT_FRAC

const assFormulaQuestionResult::RESULT_FRAC = 2

Definition at line 31 of file class.assFormulaQuestionResult.php.

Referenced by assFormulaQuestion\getBestSolution(), isCorrect(), assFormulaQuestionTest\simpleRatedCalculationsData(), and assFormulaQuestion\substituteVariables().

RESULT_NO_SELECTION

const assFormulaQuestionResult::RESULT_NO_SELECTION = 0

Definition at line 29 of file class.assFormulaQuestionResult.php.

Referenced by isCorrect(), assFormulaQuestionTest\simpleRatedCalculationsData(), and assFormulaQuestion\substituteVariables().

---

The documentation for this class was generated from the following file:

• components/ILIAS/TestQuestionPool/classes/class.assFormulaQuestionResult.php