<?php
/* For licensing terms, see /license.txt */

/**
 * Class HotpotatoesExerciseResult
 * Allows you to export exercises results in multiple presentation forms
 * @package chamilo.exercise
 */
class HotpotatoesExerciseResult
{
    //stores the list of exercises
    private $exercises_list = array();

    //stores the results
    private $results = array();

    /**
     * Gets the results of all students (or just one student if access is limited)
     * @param    string        The document path (for HotPotatoes retrieval)
     * @param    integer        User ID. Optional. If no user ID is provided, we take all the results. Defauts to null
     * @param string $document_path
     */
    public function getExercisesReporting($document_path, $hotpotato_name)
    {
        $return = array();
        $TBL_USER = Database::get_main_table(TABLE_MAIN_USER);
        $TBL_TRACK_HOTPOTATOES = Database::get_main_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);

        $cid = api_get_course_id();
        $course_id = api_get_course_int_id();
        //$user_id         = intval($user_id);
        $user_id = null;
        $session_id_and  = ' AND te.session_id = ' . api_get_session_id() . ' ';
        $hotpotato_name  = Database::escape_string($hotpotato_name);

        if (!empty($exercise_id)) {
            $session_id_and .= " AND exe_exo_id = $exercise_id ";
        }

        if (empty($user_id)) {
            $sql = "SELECT firstname as userpart1, lastname as userpart2 ,
                    email,
                    tth.exe_name,
                    tth.exe_result,
                    tth.exe_weighting,
                    tth.exe_date
                    FROM $TBL_TRACK_HOTPOTATOES tth, $TBL_USER tu
                    WHERE   tu.user_id=tth.exe_user_id AND
                            tth.c_id = $course_id AND
                            tth.exe_name = '$hotpotato_name'
                    ORDER BY tth.c_id ASC, tth.exe_date ASC";
        } else {
            // get only this user's results
            $sql = "SELECT '', exe_name, exe_result , exe_weighting, exe_date
                    FROM $TBL_TRACK_HOTPOTATOES
                    WHERE
                        exe_user_id = '" . $user_id . "' AND
                        c_id = $course_id AND
                        tth.exe_name = '$hotpotato_name'
                    ORDER BY c_id ASC, exe_date ASC";
        }

        $results = array();

        $resx = Database::query($sql);
        while ($rowx = Database::fetch_array($resx, 'ASSOC')) {
            $results[] = $rowx;
        }

        $hpresults = array();
        $resx = Database::query($sql);
        while ($rowx = Database::fetch_array($resx, 'ASSOC')) {
            $hpresults[] = $rowx;
        }

        // Print the Result of Hotpotatoes Tests
        if (is_array($hpresults)) {
            for ($i = 0; $i < sizeof($hpresults); $i++) {
                $return[$i] = array();
                $title = GetQuizName($hpresults[$i]['exe_name'], $document_path);
                if ($title =='') {
                    $title = basename($hpresults[$i]['exe_name']);
                }
                if (empty($user_id)) {
                    $return[$i]['email'] = $hpresults[$i]['email'];
                    $return[$i]['first_name'] = $hpresults[$i]['userpart1'];
                    $return[$i]['last_name'] = $hpresults[$i]['userpart2'];
                }
                $return[$i]['title'] = $title;
                $return[$i]['exe_date']  = $hpresults[$i]['exe_date'];

                $return[$i]['result'] = $hpresults[$i]['exe_result'];
                $return[$i]['max'] = $hpresults[$i]['exe_weighting'];
            }
        }
        $this->results = $return;

        return true;
    }

    /**
     * Exports the complete report as a CSV file
     * @param string $document_path Document path inside the document tool
     * @param string $hotpotato_name

     * @return	boolean		False on error
     */
    public function exportCompleteReportCSV($document_path = '', $hotpotato_name = '')
    {
        global $charset;
        $this->getExercisesReporting($document_path, $hotpotato_name);
        $filename = 'exercise_results_'.date('YmdGis').'.csv';
        if (!empty($user_id)) {
            $filename = 'exercise_results_user_'.$user_id.'_'.date('YmdGis').'.csv';
        }
        $data = '';

        if (api_is_western_name_order()) {
            if (!empty($this->results[0]['first_name'])) {
                $data .= get_lang('FirstName').';';
            }
            if (!empty($this->results[0]['last_name'])) {
                $data .= get_lang('LastName').';';
            }
        } else {
            if (!empty($this->results[0]['last_name'])) {
                $data .= get_lang('LastName').';';
            }
            if (!empty($this->results[0]['first_name'])) {
                $data .= get_lang('FirstName').';';
            }
        }
        $data .= get_lang('Email').';';
        $data .= get_lang('Title').';';
        $data .= get_lang('StartDate').';';
        $data .= get_lang('Score').';';
        $data .= get_lang('Total').';';
        $data .= "\n";

        // Results
        foreach ($this->results as $row) {
            if (api_is_western_name_order()) {
              $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['first_name']), ENT_QUOTES, $charset)).';';
              $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['last_name']), ENT_QUOTES, $charset)).';';
            } else {
              $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['last_name']), ENT_QUOTES, $charset)).';';
              $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['first_name']), ENT_QUOTES, $charset)).';';
            }

            $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['email']), ENT_QUOTES, $charset)).';';
            $data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($row['title']), ENT_QUOTES, $charset)).';';
            $data .= str_replace("\r\n",'  ',$row['exe_date']).';';
            $data .= str_replace("\r\n",'  ',$row['result']).';';
            $data .= str_replace("\r\n",'  ',$row['max']).';';
            $data .= "\n";
        }

        //output the results
        $len = strlen($data);
        header('Content-type: application/octet-stream');
        header('Content-Type: application/force-download');
        header('Content-length: '.$len);
        if (preg_match("/MSIE 5.5/", $_SERVER['HTTP_USER_AGENT'])) {
            header('Content-Disposition: filename= '.$filename);
        } else {
            header('Content-Disposition: attachment; filename= '.$filename);
        }
        if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE')) {
            header('Pragma: ');
            header('Cache-Control: ');
            header('Cache-Control: public'); // IE cannot download from sessions without a cache
        }
        header('Content-Description: '.$filename);
        header('Content-transfer-encoding: binary');
        // @todo add this utf-8 header for all csv files
        echo "\xEF\xBB\xBF";  // force utf-8 header of csv file
        echo $data;
        return true;
    }

    /**
     * Exports the complete report as an XLS file
     * @param string $document_path
     * @param null $user_id
     * @param bool $export_user_fields
     * @param int $export_filter
     * @param int $exercise_id
     * @param null $hotpotato_name
     * @return bool
     */
    public function exportCompleteReportXLS(
        $document_path = '',
        $user_id = null,
        $export_user_fields = false,
        $export_filter = 0,
        $exercise_id = 0,
        $hotpotato_name = null
    ) {
        global $charset;
        $this->getExercisesReporting(
            $document_path,
            $user_id,
            $export_filter,
            $exercise_id,
            $hotpotato_name
        );
        $filename = 'exercise_results_'.api_get_local_time().'.xls';
        if (!empty($user_id)) {
            $filename = 'exercise_results_user_'.$user_id.'_'.api_get_local_time().'.xls';
        }

        $spreadsheet = new PHPExcel();
        $spreadsheet->setActiveSheetIndex(0);
        $worksheet = $spreadsheet->getActiveSheet();

        $line = 0;
        $column = 0; //skip the first column (row titles)

        // check if exists column 'user'
        $with_column_user = false;
        foreach ($this->results as $result) {
            if (!empty($result['last_name']) && !empty($result['first_name'])) {
                $with_column_user = true;
                break;
            }
        }

        if ($with_column_user) {
            $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Email'));
            $column++;
            if (api_is_western_name_order()) {
                $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('FirstName'));
                $column++;
                $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('LastName'));
                $column++;
            } else {
                $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('LastName'));
                $column++;
                $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('FirstName'));
                $column++;
            }
        }

        if ($export_user_fields) {
            //show user fields section with a big th colspan that spans over all fields
            $extra_user_fields = UserManager::get_extra_fields(
                0,
                1000,
                5,
                'ASC',
                false,
                1
            );

            //show the fields names for user fields
            foreach ($extra_user_fields as $field) {
                $worksheet->setCellValueByColumnAndRow(
                    $column,
                    $line,
                    api_html_entity_decode(
                        strip_tags($field[3]),
                        ENT_QUOTES,
                        $charset
                    )
                );
                $column++;
            }
        }

        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Title'));
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('StartDate'));
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('EndDate'));
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Duration').' ('.get_lang('MinMinutes').')');
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Score'));
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Total'));
        $column++;
        $worksheet->setCellValueByColumnAndRow($column, $line, get_lang('Status'));
        $line++;

        foreach ($this->results as $row) {
            $column = 0;

            if ($with_column_user) {
                $worksheet->setCellValueByColumnAndRow(
                    $column,
                    $line,
                    api_html_entity_decode(
                        strip_tags($row['email']),
                        ENT_QUOTES,
                        $charset
                    )
                );
                $column++;

                if (api_is_western_name_order()) {
                    $worksheet->setCellValueByColumnAndRow($column, $line,api_html_entity_decode(strip_tags($row['first_name']), ENT_QUOTES, $charset));
                    $column++;
                    $worksheet->setCellValueByColumnAndRow($column, $line, api_html_entity_decode(strip_tags($row['last_name']), ENT_QUOTES, $charset));
                    $column++;
                } else {
                    $worksheet->setCellValueByColumnAndRow($column, $line, api_html_entity_decode(strip_tags($row['last_name']), ENT_QUOTES, $charset));
                    $column++;
                    $worksheet->setCellValueByColumnAndRow($column, $line, api_html_entity_decode(strip_tags($row['first_name']), ENT_QUOTES, $charset));
                    $column++;
                }
            }

            if ($export_user_fields) {
                //show user fields data, if any, for this user
                $user_fields_values = UserManager::get_extra_user_data(
                    $row['user_id'],
                    false,
                    false,
                    false,
                    true
                );
                foreach ($user_fields_values as $value) {
                    $worksheet->setCellValueByColumnAndRow($column, $line, api_html_entity_decode(strip_tags($value), ENT_QUOTES, $charset));
                    $column++;
                }
            }

            $worksheet->setCellValueByColumnAndRow($column, $line, api_html_entity_decode(strip_tags($row['title']), ENT_QUOTES, $charset));
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['start_date']);
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['end_date']);
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['duration']);
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['result']);
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['max']);
            $column++;
            $worksheet->setCellValueByColumnAndRow($column, $line, $row['status']);
            $line++;
        }

        $file = api_get_path(SYS_ARCHIVE_PATH).api_replace_dangerous_char($filename);
        $writer = new PHPExcel_Writer_Excel2007($spreadsheet);
        $writer->save($file);
        DocumentManager::file_send_for_download($file, true, $filename);

        return true;
    }
}