<?php

/*
 * FORMA - The E-Learning Suite
 *
 * Copyright (c) 2013-2023 (Forma)
 * https://www.formalms.org
 * License https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
 *
 * from docebo 4.0.5 CE 2008-2012 (c) docebo
 * License https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
 */

if (!defined('IN_FORMA')) {
    exit('You cannot access this file directly');
}

require_once _lms_ . '/modules/question_poll/class.question.php';

class DocValutation_QuestionPoll extends QuestionPoll
{
    /**
     * class constructor.
     *
     * @param int	the unique database identifer of a question
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function __construct($id)
    {
        parent::__construct($id);
    }

    /**
     * this function is useful for question recognize.
     *
     * @return string return the identifier of the quetsion
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function getQuestionType()
    {
        return 'doc_valutation';
    }

    /**
     * this function write a gui line for answer insertion.
     *
     * @param int $i indicate the line number
     *
     * @return nothing
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function _lineAnswer($i)
    {
        $lang = FormaLanguage::createInstance('poll');

        $GLOBALS['page']->add('<tr class="line_answer">'
            . '<td class="image">'
            //answer
            . '<label class="access-only" for="answer_' . $i . '">' . $lang->def('_ANSWER') . '</label>'
            . '<textarea class="poll_area_answer" id="answer_' . $i . '" name="answer[' . $i . ']" cols="50" rows="3">'
            . (isset($_POST['answer'][$i]) ? stripslashes($_POST['answer'][$i]) : $lang->def('_QUEST_ANSWER'))
            . '</textarea>'
            . '</td>'
            . '</tr>' . "\n", 'content');
    }

    /**
     * this function write a gui line for answer insertion,projected for modify.
     *
     * @param int $i indicate the line number
     *
     * @return nothing
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function _lineModAnswer($i)
    {
        $lang = FormaLanguage::createInstance('poll');

        $GLOBALS['page']->add('<tr class="line_answer">'
            . '<td class="image">', 'content');
        if (isset($_POST['answer_id'][$i])) {
            $GLOBALS['page']->add('<input type="hidden" id="answer_id_' . $i . '" name="answer_id[' . $i . ']" value="' . $_POST['answer_id'][$i] . '" />', 'content');
        }
        $GLOBALS['page']->add(
            '<label class="access-only" for="answer_' . $i . '">' . $lang->def('_ANSWER') . '</label>'
            . '<textarea class="poll_area_answer" id="answer_' . $i . '" name="answer[' . $i . ']" cols="50" rows="3">'
            . (isset($_POST['answer'][$i]) ? stripslashes($_POST['answer'][$i]) : '')
            . '</textarea>'
            . '</td>'
            . '</tr>' . "\n", 'content');
    }

    /**
     * this function create a new question.
     *
     * @param int    $id_poll   indicates the poll selected
     * @param string $back_poll indicates the return url
     *
     * @return nothing
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function create($id_poll, $back_poll)
    {
        $lang = FormaLanguage::createInstance('poll');

        require_once _base_ . '/lib/lib.form.php';
        $url_encode = htmlentities(urlencode($back_poll));

        if (isset($_POST['add_question'])) {
            //insert the new question

            $min_value = FormaLms\lib\Get::req('min_value', DOTY_INT, 0);
            $max_value = FormaLms\lib\Get::req('max_value', DOTY_INT, 0);
            $step_value = (float) str_replace(',', '.', $_POST['step_value']);

            $i = $min_value;
            $seq = 0;

            if ($min_value >= $max_value || $step_value == 0) {
                $GLOBALS['page']->add(getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))), 'content');
            } else {
                $ins_query = '
				INSERT INTO ' . $GLOBALS['prefix_lms'] . "_pollquest
				( id_poll, id_category, type_quest, title_quest, sequence, page ) VALUES
				( 	'" . $id_poll . "',
					'" . (int) $_POST['id_category'] . "',
					'" . $this->getQuestionType() . "',
					'" . $_POST['title_quest'] . "',
					'" . (int) $this->_getNextSequence($id_poll) . "',
					'" . $this->_getPageNumber($id_poll) . "' ) ";
                if (!sql_query($ins_query)) {
                    $GLOBALS['page']->add(getErrorUi($lang->def('_POLL_ERR_INS_QUEST')
                        . getBackUi('index.php?modname=question_poll&amp;op=create&amp;type_quest='
                        . $this->getQuestionType() . '&amp;id_poll=' . $id_poll . '&amp;back_poll=' . $url_encode, $lang->def('_BACK'))), 'content');
                }
                //find id of auto_increment colum
                list($id_quest) = sql_fetch_row(sql_query('SELECT LAST_INSERT_ID()'));
                if (!$id_quest) {
                    $GLOBALS['page']->add(getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))), 'content');
                }

                $query = 'INSERT INTO %lms_pollquestanswer'
                            . ' (id_quest, answer, sequence)'
                            . " VALUES ('" . $id_quest . "', '" . $min_value . "', '0'),"
                            . " ('" . $id_quest . "', '" . $max_value . "', '1'),"
                            . " ('" . $id_quest . "', '" . $step_value . "', '2');";

                if (!sql_query($query)) {
                    $GLOBALS['page']->add(getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))), 'content');
                } else {
                    Util::jump_to('' . $back_poll);
                }
            }
        }

        //insert form
        require_once _lms_ . '/lib/lib.questcategory.php';
        $categories = Questcategory::getCategory();
        //writing difficult array

        $GLOBALS['page']->add(
            getTitleArea($lang->def('_POLL_SECTION'), 'poll')
            . '<div class="std_block">'
            . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))

            . '<div class="title_big">'
            . $lang->def('_QUEST_ACRN_' . strtoupper($this->getQuestionType())) . ' - '
            . $lang->def('_QUEST_' . strtoupper($this->getQuestionType()))
            . '</div><br />'
            . Form::openForm('form_add_quest', 'index.php?modname=question_poll&amp;op=create')

            . Form::openElementSpace()
            . Form::getHidden('type_quest', 'type_quest', $this->getQuestionType())
            . Form::getHidden('id_poll', 'id_poll', $id_poll)
            . Form::getHidden('back_poll', 'back_poll', $url_encode)

            . Form::getTextarea($lang->def('_POLL_QUEST_TITLE'), 'title_quest', 'title_quest',
                (isset($_POST['title_quest']) ? stripslashes($_POST['title_quest']) : ''))
            . Form::getDropdown($lang->def('_CATEGORY'), 'id_category', 'id_category', $categories,
                (isset($_POST['id_category']) ? $_POST['id_category'] : 0))
            . '<div class="no_float"></div><br />'
            . Form::getTextfield($lang->def('_MIN_VALUE'), 'min_value', 'min_value', 255)
            . Form::getTextfield($lang->def('_MAX_VALUE'), 'max_value', 'max_value', 255)
            . Form::getTextfield($lang->def('_STEP_VALUE'), 'step_value', 'step_value', 255, '1'), 'content');
        $GLOBALS['page']->add(
            Form::closeElementSpace()

            . Form::openButtonSpace()
            . Form::getButton('add_question', 'add_question', $lang->def('_INSERT'))
            . Form::closeButtonSpace()
            . Form::closeForm()
            . '</div>', 'content');
    }

    /**
     * this function modify a question.
     *
     * @param string $back_poll indicates the return url
     *
     * @return nothing
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function edit($back_poll)
    {
        $lang = FormaLanguage::createInstance('poll');

        require_once _base_ . '/lib/lib.form.php';
        $url_encode = htmlentities(urlencode($back_poll));

        //manage number of answer
        if (isset($_POST['save_question'])) {
            //update question
            $ins_query = '
			UPDATE ' . $GLOBALS['prefix_lms'] . "_pollquest
			SET id_category = '" . (int) $_POST['id_category'] . "',
				type_quest = '" . $this->getQuestionType() . "',
				title_quest = '" . $_POST['title_quest'] . "'
			WHERE id_quest = '" . (int) $this->id . "'";
            if (!sql_query($ins_query)) {
                getErrorUi($lang->def('_POLL_ERR_INS_QUEST')
                    . getBackUi('index.php?modname=question_poll&amp;op=edit&amp;type_quest='
                    . $this->getQuestionType() . '&amp;id_quest=' . $this->id . '&amp;back_poll=' . $url_encode, $lang->def('_BACK')));
            }
            //update answer
            if (!isset($_POST['is_correct'])) {
                $_POST['is_correct'] = -1;
            }

            $min_value = FormaLms\lib\Get::req('min_value', DOTY_INT, 0);
            $max_value = FormaLms\lib\Get::req('max_value', DOTY_INT, 0);
            $step_value = (float) str_replace(',', '.', $_POST['step_value']);

            if ($min_value >= $max_value || $step_value == 0) {
                $GLOBALS['page']->add(getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))), 'content');
            } else {
                $del_answer_query = 'DELETE FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
									WHERE id_quest = '" . (int) $this->id . "'";
                if (!sql_query($del_answer_query)) {
                    getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK')));
                } else {
                    $query = 'INSERT INTO %lms_pollquestanswer'
                                . ' (id_quest, answer, sequence)'
                                . " VALUES ('" . $this->id . "', '" . $min_value . "', '0'),"
                                . " ('" . $this->id . "', '" . $max_value . "', '1'),"
                                . " ('" . $this->id . "', '" . $step_value . "', '2');";

                    if (!sql_query($query)) {
                        getErrorUi($lang->def('_POLL_ERR_INS_ANSWER') . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK')));
                    } else {
                        Util::jump_to($back_poll);
                    }
                }
            }
        }

        //insert form
        require_once _lms_ . '/lib/lib.questcategory.php';
        $categories = Questcategory::getCategory();
        //writing difficult

        //load data
        list($sel_cat, $quest) = sql_fetch_row(sql_query('
		SELECT id_category, title_quest
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquest
		WHERE id_quest = '" . (int) $this->id . "'"));

        $re_answer = sql_query('
		SELECT id_answer, answer
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
		WHERE id_quest = '" . (int) $this->id . "'
		ORDER BY sequence");

        $array_answer = [];

        while (list($id_answer, $answer) = sql_fetch_row($re_answer)) {
            $array_answer[] = $answer;
        }
        if (!empty($array_answer)) {
            $min_value = $array_answer[0];
            $max_value = $array_answer[1];
            $step_value = $array_answer[2];
        } else {
            $min_value = '';
            $max_value = '';
            $step_value = '1';
        }

        $GLOBALS['page']->add(
            getTitleArea($lang->def('_POLL_SECTION'), 'poll')
            . '<div class="std_block">'
            . getBackUi(str_replace('&', '&amp;', $back_poll), $lang->def('_BACK'))
            . '<div class="title_big">'
            . $lang->def('_QUEST_ACRN_' . strtoupper($this->getQuestionType())) . ' - '
            . $lang->def('_QUEST_' . strtoupper($this->getQuestionType()))
            . '</div><br />'
            . Form::openForm('form_add_quest', 'index.php?modname=question_poll&amp;op=edit')

            . Form::openElementSpace()
            . Form::getHidden('type_quest', 'type_quest', $this->getQuestionType())
            . Form::getHidden('id_quest', 'id_quest', $this->id)
            . Form::getHidden('back_poll', 'back_poll', $url_encode)

            . Form::getTextarea($lang->def('_POLL_QUEST_TITLE'), 'title_quest', 'title_quest',
                (isset($_POST['title_quest']) ? stripslashes($_POST['title_quest']) : $quest))
            . Form::getDropdown($lang->def('_CATEGORY'), 'id_category', 'id_category', $categories,
                (isset($_POST['id_category']) ? $_POST['id_category'] : $sel_cat))
            . '<div class="no_float"></div><br />'
            . Form::getTextfield($lang->def('_MIN_VALUE'), 'min_value', 'min_value', 255, $min_value)
            . Form::getTextfield($lang->def('_MAX_VALUE'), 'max_value', 'max_value', 255, $max_value)
            . Form::getTextfield($lang->def('_STEP_VALUE'), 'step_value', 'step_value', 255, $step_value), 'content');

        $GLOBALS['page']->add(
            Form::closeElementSpace()
            . Form::openButtonSpace()
            . Form::getButton('save_question', 'save_question', $lang->def('_SAVE'))
            . Form::closeButtonSpace()
            . Form::closeForm()
            . '</div>', 'content');
    }

    /**
     * this function create a copy of a question and return the corresponding id.
     *
     * @return int return the id of the new question if success else return false
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function copy($new_id_poll, $back_poll = null)
    {
        //retriving question
        list($sel_cat, $quest, $sequence, $page) = sql_fetch_row(sql_query('
		SELECT id_category, title_quest, sequence, page
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquest
		WHERE id_quest = '" . (int) $this->id . "'"));

        //insert question
        $ins_query = '
		INSERT INTO ' . $GLOBALS['prefix_lms'] . "_pollquest
		( id_poll, id_category, type_quest, title_quest, sequence, page ) VALUES
		( 	'" . (int) $new_id_poll . "',
			'" . (int) $sel_cat . "',
			'" . $this->getQuestionType() . "',
			'" . sql_escape_string($quest) . "',
			'" . (int) $sequence . "',
			'" . (int) $page . "' ) ";
        if (!sql_query($ins_query)) {
            return false;
        }
        //find id of auto_increment colum
        list($new_id_quest) = sql_fetch_row(sql_query('SELECT LAST_INSERT_ID()'));
        if (!$new_id_quest) {
            return false;
        }

        //retriving new answer
        $re_answer = sql_query('
		SELECT answer, sequence
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
		WHERE id_quest = '" . (int) $this->id . "'
		ORDER BY id_answer");
        while (list($answer, $sequence) = sql_fetch_row($re_answer)) {
            //insert answer
            $ins_answer_query = '
			INSERT INTO ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
			( id_quest, answer, sequence ) VALUES
			( 	'" . $new_id_quest . "',
				'" . sql_escape_string($answer) . "',
				'" . $sequence . "' ) ";
            if (!sql_query($ins_answer_query)) {
                return false;
            }
        }

        return $new_id_quest;
    }

    /**
     * display the quest for play, if.
     *
     * @param int  $num_quest      the number of the quest to display in front of the quest title
     * @param bool $shuffle_answer randomize the answer display order
     * @param int  $id_track       where find the answer, if find -> load
     * @param bool $freeze         if true, when load disable the user interaction
     *
     * @return string of html question code
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function play($num_quest, $shuffle_answer = false, $id_track = 0, $freeze = false)
    {
        $lang = FormaLanguage::createInstance('poll');

        list($id_quest, $title_quest) = sql_fetch_row(sql_query('
		SELECT id_quest, title_quest
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquest
		WHERE id_quest = '" . $this->id . "'"));

        $query_answer = '
		SELECT answer
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
		WHERE id_quest = '" . (int) $this->id . "'"
        . ' ORDER BY sequence';
        $re_answer = sql_query($query_answer);

        $find_prev = false;
        $id_answer_do = 0;
        if ($id_track != 0) {
            //recover previous information
            $recover_answer = '
			SELECT more_info
			FROM ' . $GLOBALS['prefix_lms'] . "_polltrack_answer
			WHERE id_quest = '" . (int) $this->id . "' AND
				id_track = '" . (int) $id_track . "'";
            $re_answer_do = sql_query($recover_answer);
            if (sql_num_rows($re_answer_do)) {
                //find previous answer
                $find_prev = true;
                list($answer_do) = sql_fetch_row($re_answer_do);
            }
        }

        $content =
            '<div class="play_question">'
            . '<div class="title_question">' . $num_quest . ') ' . $title_quest . '</div>'
            . '<div class="answer_question">';

        $answer_info = [];

        while (list($answer) = sql_fetch_row($re_answer)) {
            $answer_info[] = $answer;
        }

        $num_answer = 0;

        for ($i = $answer_info[0]; $i <= $answer_info[1]; $i += $answer_info[2]) {
            $content .= '<input type="radio" id="quest_' . $id_quest . '_' . $num_answer . '" '
                            . 'name="quest[' . $id_quest . ']" value="' . $i . '"'
                            . (($find_prev && $i == $id_answer_do) ? ' checked="checked"' : '')
                            . ($find_prev && $freeze ? ' disabled="disabled"' : '') . ' /> '
                            . '<label class="text_answer" for="quest_' . $id_quest . '_' . $num_answer . '">' . $i . '</label><br />';

            ++$num_answer;
        }

        $content .= '</div>'
                . '</div>';

        return $content;
    }

    /**
     * display the quest for report.
     *
     * @param int $num_quest the number of the quest to display in front of the quest title
     *
     * @return string of html question code
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function playReport($num_quest, $tot_tracks, &$valid_track)
    {
        $lang = FormaLanguage::createInstance('poll');

        require_once \FormaLms\lib\Forma::include(_lms_ . '/lib/', 'lib.course.php');

        list($id_quest, $title_quest) = sql_fetch_row(sql_query('
		SELECT id_quest, title_quest
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquest
		WHERE id_quest = '" . $this->id . "'"));

        $query_answer = '
		SELECT answer
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
		WHERE id_quest = '" . (int) $this->id . "'
		ORDER BY sequence";
        $re_answer = sql_query($query_answer);

        $answer_info = [];

        while (list($answer) = sql_fetch_row($re_answer)) {
            $answer_info[] = $answer;
        }

        //recover previous information
        $max = 0;
        $not_answer = $tot_tracks;
        $recover_answer = '
		SELECT more_info, COUNT(*)
		FROM ' . $GLOBALS['prefix_lms'] . "_polltrack_answer
		WHERE id_quest = '" . (int) $this->id . "' ";
        if (is_array($valid_track) && !empty($valid_track)) {
            $recover_answer .= ' AND id_track IN ( ' . implode(',', $valid_track) . ' ) ';
        }
        $recover_answer .= ' GROUP BY more_info ';
        $re_answer_do = sql_query($recover_answer);

        //find previous answer
        while (list($id_a, $num) = sql_fetch_row($re_answer_do)) {
            if ($num > $max) {
                $max = $num;
            }
            $num_answer[$id_a] = $num;
            $not_answer -= $num;
        }
        $content =
            '<div class="play_question">'
            . '<div class="title_question">' . $num_quest . ') ' . $title_quest . '</div>'
            . '<div class="answer_question">'
            . '<table summary="' . $lang->def('_SUMMARY_ANSWER') . '" cellspancing="0" class="poll_report">'
            . '<caption>' . $lang->def('_CAPTION_ANSWER') . '</caption>'
            . '<thead>'
                . '<tr><th class="text_answer" scope="col">' . $lang->def('_ANSWER_TEXT') . '</th><th scope="col">' . $lang->def('_ANSWER_NUMBER') . '</th></tr>'
            . '</thead>';

        for ($i = $answer_info[0]; $i <= $answer_info[1]; $i += $answer_info[2]) {
            if (isset($num_answer[(string) $i]) && $max != 0) {
                $content .= '<tr><td>' . $i . '</td><td><div class="colored_row" style="width: ' . round($num_answer[(string) $i] / $max * 90, 2) . '%;">'
                            . $num_answer[(string) $i] . '</div></td></tr>';
            } else {
                $content .= '<tr><td>' . $i . '</td><td><div class="colored_row" style="width: 0%;">'
                            . '</div></td></tr>';
            }
        }

        $content .= '</table>'
                . '</div>'
                . '</div>';

        return $content;
    }

    /**
     * save the answer to the question in an proper format.
     *
     * @param int   $id_track      the relative id_track
     * @param array $source        source of the answer send by the user
     * @param bool  $can_overwrite if the answer for this question exists and this is true, the old answer
     *                             is updated, else the old answer will be leaved
     *
     * @return bool true if success false otherwise
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function storeAnswer($id_track, &$source, $can_overwrite = false)
    {
        $result = true;

        if ($this->userDoAnswer($id_track)) {
            if (!$can_overwrite) {
                return true;
            }
            if (!$this->deleteAnswer($id_track)) {
                return false;
            }
        }

        if (isset($source['quest'][$this->id])) {
            //answer checked by the user
            $track_query = '
			INSERT INTO ' . $GLOBALS['prefix_lms'] . "_polltrack_answer ( id_track, id_quest, id_answer, more_info ) 
			VALUES (
				'" . (int) $id_track . "', 
				'" . (int) $this->id . "', 
				'0', 
				'" . $source['quest'][$this->id] . "' )";

            return sql_query($track_query);
        }
    }

    /**
     * delete the old answer.
     *
     * @param int $id_track the relative id_track
     *
     * @return bool true if success false otherwise
     *
     * @author Fabio Pirovano (fabio@docebo.com)
     */
    public function deleteAnswer($id_track)
    {
        return sql_query('
		DELETE FROM ' . $GLOBALS['prefix_lms'] . "_polltrack_answer
		WHERE id_track = '" . (int) $id_track . "' AND
			id_quest = '" . $this->id . "'");
    }

    public function export_CSV($num_quest, $tot_tracks, &$valid_track)
    {
        $lang = FormaLanguage::createInstance('poll');

        require_once \FormaLms\lib\Forma::include(_lms_ . '/lib/', 'lib.course.php');

        list($id_quest, $title_quest) = sql_fetch_row(sql_query('
		SELECT id_quest, title_quest
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquest
		WHERE id_quest = '" . $this->id . "'"));

        $query_answer = '
		SELECT answer
		FROM ' . $GLOBALS['prefix_lms'] . "_pollquestanswer
		WHERE id_quest = '" . (int) $this->id . "'
		ORDER BY sequence";
        $re_answer = sql_query($query_answer);

        $answer_info = [];

        while (list($answer) = sql_fetch_row($re_answer)) {
            $answer_info[] = $answer;
        }

        //recover previous information
        $max = 0;
        $not_answer = $tot_tracks;
        $recover_answer = '
		SELECT more_info, COUNT(*)
		FROM ' . $GLOBALS['prefix_lms'] . "_polltrack_answer
		WHERE id_quest = '" . (int) $this->id . "' ";
        if (is_array($valid_track) && !empty($valid_track)) {
            $recover_answer .= ' AND id_track IN ( ' . implode(',', $valid_track) . ' ) ';
        }
        $recover_answer .= ' GROUP BY more_info ';
        $re_answer_do = sql_query($recover_answer);

        //find previous answer
        while (list($id_a, $num) = sql_fetch_row($re_answer_do)) {
            if ($num > $max) {
                $max = $num;
            }
            $num_answer[$id_a] = $num;
            $not_answer -= $num;
        }
        $content = '"' . $num_quest . '";"' . str_replace('"', '""', $title_quest) . '";"' . $lang->def('_QUEST_DOC_VALUTATION') . '"' . "\r\n";

        for ($i = $answer_info[0]; $i <= $answer_info[1]; $i += $answer_info[2]) {
            if (isset($num_answer[(string) $i]) && $max != 0) {
                $content .= ';"' . str_replace('"', '""', $i) . '";' . $num_answer[(string) $i] . "\r\n";
            } else {
                $content .= ';"' . str_replace('"', '""', $i) . '";0' . "\r\n";
            }
        }

        return $content;
    }
}
