class.ilDclFormulaRecordFieldModel.php

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<?php

/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilDclFormulaRecordFieldModel extends ilDclBaseRecordFieldModel
{

    protected $expression = '';
    protected $parsed_value = '';


    public function __construct(ilDclBaseRecordModel $record, ilDclBaseFieldModel $field)
    {
        parent::__construct($record, $field);

        $this->expression = $this->getField()->getProperty(ilDclBaseFieldModel::PROP_FORMULA_EXPRESSION);
    }


    public function addHiddenItemsToConfirmation(ilConfirmationGUI &$confirmation)
    {
        return;
    }


    protected function loadValue()
    {
        return null;
    }


    public function setValue($value, $omit_parsing = false)
    {
        unset($value);
    }


    public function doUpdate()
    {
        return null;
    }


    public function doRead()
    {
        return null;
    }


    public function delete()
    {
        return null;
    }


    public function getFormInput()
    {
        return $this->parse();
    }


    public function getHTML()
    {
        return $this->parse();
    }


    public function getExportValue()
    {
        return $this->parse();
    }


    public function getValue()
    {
        return $this->parse();
    }


    protected function parse()
    {
        if (!$this->parsed_value && $this->expression) {
            $parser = new ilDclExpressionParser($this->expression, $this->getRecord(), $this->getField());
            try {
                $this->parsed_value = $parser->parse();
            } catch (ilException $e) {
                return $this->lng->txt('dcl_error_parsing_expression') . ' (' . $e->getMessage() . ')';
            }
        }

        return $this->parsed_value;
    }
}