class.ilDclSelectionRecordFieldModel.php

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<?php

abstract class ilDclSelectionRecordFieldModel extends ilDclBaseRecordFieldModel
{
    // those should be overwritten by subclasses
    public const PROP_SELECTION_TYPE = '';
    public const PROP_SELECTION_OPTIONS = '';

    public function getValue()
    {
        if ($this->getField()->isMulti() && !is_array($this->value)) {
            return [$this->value];
        }
        if (!$this->getField()->isMulti() && is_array($this->value)) {
            return (count($this->value) == 1) ? array_shift($this->value) : '';
        }

        return $this->value;
    }

    public function parseExportValue($value): string
    {
        $values = ilDclSelectionOption::getValues($this->getField()->getId(), $value);

        return implode("; ", $values);
    }

    public function getValueFromExcel(ilExcel $excel, int $row, int $col)
    {
        $string = parent::getValueFromExcel($excel, $row, $col);
        $old = $string;
        if ($this->getField()->isMulti()) {
            $string = $this->getMultipleValuesFromString($string);
            $has_value = count($string);
        } else {
            $string = $this->getValueFromString($string);
            $has_value = $string;
        }

        if (!$has_value && $old) {
            $warning = "(" . $row . ", " . ilDataCollectionImporter::getExcelCharForInteger($col + 1) . ") " . $this->lng->txt("dcl_no_such_reference") . " "
                . $old;

            return ['warning' => $warning];
        }

        return $string;
    }

    protected function getMultipleValuesFromString(string $stringValues): array
    {
        $delimiter = strpos($stringValues, '; ') ? '; ' : ', ';
        $slicedStrings = explode($delimiter, $stringValues);
        $slicedReferences = [];
        $resolved = 0;
        for ($i = 0; $i < count($slicedStrings); $i++) {
            //try to find a reference since the last resolved value separated by a comma.
            // $i = 1; $resolved = 0; $string = "hello, world, gaga" -> try to match "hello, world".
            $searchString = implode(array_slice($slicedStrings, $resolved, $i - $resolved + 1));
            if ($ref = $this->getValueFromString($searchString)) {
                $slicedReferences[] = $ref;
                $resolved = $i;
                continue;
            }

            //try to find a reference with the current index.
            // $i = 1; $resolved = 0; $string = "hello, world, gaga" -> try to match "world".
            $searchString = $slicedStrings[$i];
            if ($ref = $this->getValueFromString($searchString)) {
                $slicedReferences[] = $ref;
                $resolved = $i;
            }
        }

        return $slicedReferences;
    }

    protected function getValueFromString(string $string): ?int
    {
        $options = $this->getField()->getProperty(static::PROP_SELECTION_OPTIONS);
        foreach ($options as $opt) {
            if ($opt->getValue() == $string) {
                return $opt->getOptId();
            }
        }

        return null;
    }
}