<?php
/* For licensing terms, see /license.txt */
/**
*	ExerciseResult class: This class allows to instantiate an object of type ExerciseResult
*	which allows you to export exercises results in multiple presentation forms
*	@package chamilo.gradebook
* 	@author Yannick Warnier
*/

/**
 * Gradebook results class
 * @package chamilo.gradebook
 */
class GradeBookResult
{
	private $gradebook_list = array(); //stores the list of exercises
	private $results = array(); //stores the results

	/**
	 * constructor of the class
	 */
	public function GradeBookResult($get_questions=false,$get_answers=false) {
		//nothing to do
		/*
		$this->exercise_list = array();
		$this->readExercisesList();
		if($get_questions)
		{
			foreach($this->exercises_list as $exe)
			{
				$this->exercises_list['questions'] = $this->getExerciseQuestionList($exe['id']);
			}
		}
		*/
	}

	/**
	 * Reads exercises information (minimal) from the data base
	 * @param	boolean		Whether to get only visible exercises (true) or all of them (false). Defaults to false.
	 * @return	array		A list of exercises available
	 */
	private function _readGradebookList($only_visible = false) {
		$return = array();
    	$TBL_EXERCISES          = Database::get_course_table(TABLE_QUIZ_TEST);

		$sql="SELECT id,title,type,random,active FROM $TBL_EXERCISES";
		if($only_visible) {
			$sql.= ' WHERE active=1';
		}
		$sql .= ' ORDER BY title';
		$result=Database::query($sql);

		// if the exercise has been found
		while($row=Database::fetch_array($result,'ASSOC')) {
			$return[] = $row;
		}
		// exercise not found
		return $return;
	}

	/**
	 * Gets the questions related to one exercise
	 * @param	integer		Exercise ID
	 */
	private function _readGradeBookQuestionsList($e_id) {
		$return = array();
    	$TBL_EXERCISE_QUESTION  = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
    	$TBL_QUESTIONS = Database::get_course_table(TABLE_QUIZ_QUESTION);
    	$course_id = api_get_course_int_id();
		$sql="SELECT q.id, q.question, q.ponderation, q.position, q.type, q.picture " .
			" FROM $TBL_EXERCISE_QUESTION eq, $TBL_QUESTIONS q " .
			" WHERE eq.c_di = $course_id AND
					q.c_di = $course_id AND
					eq.question_id=q.id AND
					eq.exercice_id='$e_id' " .
			" ORDER BY q.position";
		$result = Database::query($sql);

		// fills the array with the question ID for this exercise
		// the key of the array is the question position
		while($row=Database::fetch_array($result,'ASSOC')) {
			$return[] = $row;
		}
		return true;
	}
	/**
	 * Gets the results of all students (or just one student if access is limited)
	 * @param	string		The document path (for HotPotatoes retrieval)
	 * @param	integer		User ID. Optional. If no user ID is provided, we take all the results. Defauts to null
	 */
	function _getGradeBookReporting($document_path,$user_id=null) {
		$return = array();
    	$TBL_EXERCISES          = Database::get_course_table(TABLE_QUIZ_TEST);
    	$TBL_USER          	    = Database::get_main_table(TABLE_MAIN_USER);
		$TBL_TRACK_EXERCISES	= Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
		$TBL_TRACK_HOTPOTATOES	= Database::get_main_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);

    	$cid = api_get_course_id();
    	$course_id = api_get_course_int_id();
		if (empty($user_id)) {
			//get all results (ourself and the others) as an admin should see them
			//AND exe_user_id <> $_user['user_id']  clause has been removed
			$sql="SELECT ".(api_is_western_name_order() ? "CONCAT(firstname,' ',lastname)" : "CONCAT(lastname,' ',firstname)").", ce.title, te.exe_result ,
						te.exe_weighting, te.exe_date,te.exe_id, user.email, user.user_id
				  FROM $TBL_EXERCISES ce , $TBL_TRACK_EXERCISES te, $TBL_USER user
				  WHERE ce.c_id = $course_id AND
				  		te.exe_exo_id = ce.id AND
				  		user_id=te.exe_user_id AND te.c_id = '$course_id'
				  ORDER BY te.c_id ASC, ce.title ASC, te.exe_date ASC";

			$hpsql="SELECT ".(api_is_western_name_order() ? "CONCAT(tu.firstname,' ',tu.lastname)" : "CONCAT(tu.lastname,' ',tu.firstname)").", tth.exe_name,
						tth.exe_result , tth.exe_weighting, tth.exe_date, tu.email, tu.user_id
					FROM $TBL_TRACK_HOTPOTATOES tth, $TBL_USER tu
					WHERE  tu.user_id=tth.exe_user_id AND tth.c_id = '".$course_id."'
					ORDER BY tth.c_id ASC, tth.exe_date ASC";

		} else { // get only this user's results
			  $sql = "SELECT '',ce.title, te.exe_result , te.exe_weighting, te.exe_date,te.exe_id
						FROM $TBL_EXERCISES ce , $TBL_TRACK_EXERCISES te
				  		WHERE 	ce.c_id 		= $course_id AND
				  				te.exe_exo_id 	= ce.id AND
				  				te.exe_user_id 	= '".$user_id."' AND
				  				te.c_id = '$course_id'
				  		ORDER BY te.c_id ASC, ce.title ASC, te.exe_date ASC";

			$hpsql="SELECT '',exe_name, exe_result , exe_weighting, exe_date
					FROM $TBL_TRACK_HOTPOTATOES
					WHERE exe_user_id = '".$user_id."' AND c_id = '".$course_id."'
					ORDER BY c_id ASC, exe_date ASC";
		}

		$results=getManyResultsXCol($sql,8);
		$hpresults=getManyResultsXCol($hpsql,7);

		$NoTestRes = 0;
		$NoHPTestRes = 0;
		$j=0;
		//Print the results of tests
		if (is_array($results)) {
			for ($i = 0; $i < sizeof($results); $i++) {
				$return[$i] = array();
				$id = $results[$i][5];
				$mailid = $results[$i][6];
				$user = $results[$i][0];
				$test = $results[$i][1];
				$res = $results[$i][2];
				if(empty($user_id)) {
					$user = $results[$i][0];
					$return[$i]['user'] = $user;
					$return[$i]['user_id'] = $results[$i][7];
				}
				$return[$i]['title'] = $test;
				$return[$i]['time'] = api_convert_and_format_date($results[$i][4], null, date_default_timezone_get());
				$return[$i]['result'] = $res;
				$return[$i]['max'] = $results[$i][3];
				$j=$i;
			}
		}
		$j++;
		// Print the Result of Hotpotatoes Tests
		if (is_array($hpresults)) {
			for ($i = 0; $i < sizeof($hpresults); $i++) {
				$return[$j+$i] = array();
				$title = GetQuizName($hpresults[$i][1],$document_path);
				if ($title =='') {
					$title = basename($hpresults[$i][1]);
				}
				if (empty($user_id)) {
					$return[$j+$i]['user'] = $hpresults[$i][0];
					$return[$j+$i]['user_id'] = $results[$i][6];

				}
				$return[$j+$i]['title'] = $title;
				$return[$j+$i]['time'] = api_convert_and_format_date($hpresults[$i][4], null, date_default_timezone_get());
				$return[$j+$i]['result'] = $hpresults[$i][2];
				$return[$j+$i]['max'] = $hpresults[$i][3];
			}
		}
		$this->results = $return;
		return true;
	}
	/**
	 * Exports the complete report as a CSV file
	 * @param	string		Document path inside the document tool
	 * @param	integer		Optional user ID
	 * @param	boolean		Whether to include user fields or not
	 * @return	boolean		False on error
	 */
	public function exportCompleteReportCSV($dato) {
		//$this->_getGradeBookReporting($document_path,$user_id);
		$filename = 'gradebook_results_'.gmdate('YmdGis').'.csv';
		if (!empty($user_id)) {
			$filename = 'gradebook_results_user_'.$user_id.'_'.gmdate('YmdGis').'.csv';
		}
		$data = '';
		//build the results
		//titles

		foreach ($dato[0] as $header_col) {
			if(!empty($header_col)) {
				$data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($header_col))).';';
			}
		}

		$data .="\r\n";
		$cant_students = count($dato[1]);
		//print_r($data);		exit();

		for($i=0;$i<$cant_students;$i++) {
			$column = 0;
			foreach($dato[1][$i] as $col_name) {
				$data .= str_replace("\r\n",'  ',api_html_entity_decode(strip_tags($col_name))).';';
			}
			$data .="\r\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');
		echo $data;
		return true;
	}
	/**
	 * Exports the complete report as an XLS file
	 * @return	boolean		False on error
	 */
	public function exportCompleteReportXLS($data) {
	   	$filename = 'gradebook-results-'.date('Y-m-d-h:i:s').'.xls';
		include api_get_path(LIBRARY_PATH).'pear/Spreadsheet_Excel_Writer/Writer.php';
		$workbook = new Spreadsheet_Excel_Writer();
        $workbook->setVersion(8); // BIFF8
        $workbook->setTempDir(api_get_path(SYS_ARCHIVE_PATH));
		$workbook->send($filename);

		$worksheet =& $workbook->addWorksheet('Report');
        $worksheet->setInputEncoding(api_get_system_encoding());

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

		//headers
		foreach ($data[0] as $header_col) {
			$worksheet->write($line, $column, $header_col);
			$column++;
		}
		$line++;

		$cant_students = count($data[1]);

		for ($i=0;$i<$cant_students;$i++) {
			$column = 0;
			foreach ($data[1][$i] as $col_name) {
				$worksheet->write($line,$column, html_entity_decode(strip_tags($col_name)));
				$column++;
			}
			$line++;
		}
        $workbook->close();
        exit;

	}
	/**
	 * Exports the complete report as a DOCX file
	 * @return	boolean		False on error
	 */
	public function exportCompleteReportDOC($data) {
        $_course = api_get_course_info();
        $filename = 'gb_results_'.$_course['code'].'_'.gmdate('YmdGis');
        $filepath = api_get_path(SYS_ARCHIVE_PATH).$filename;
        //build the results
        $inc = api_get_path(LIBRARY_PATH).'phpdocx/classes/CreateDocx.inc';
        require_once api_get_path(LIBRARY_PATH).'phpdocx/classes/CreateDocx.inc';
        $docx = new CreateDocx();
        $paramsHeader = array(
            'font' => 'Courrier',
            'jc' => 'left',
            'textWrap' => 5,
        );
        $docx->addHeader(get_lang('FlatView'), $paramsHeader);
        $params = array(
            'font' => 'Courrier',
            'border' => 'single',
            'border_sz' => 20
        );
        $lines = 0;
        $values[] = implode("\t",$data[0]);
        foreach ($data[1] as $line) {
            $values[] = implode("\t",$line);
            $lines++;
        }
        //$data = array();
        //$docx->addTable($data, $params);
        $docx->addList($values, $params);
        //$docx->addFooter('', $paramsHeader);
        $paramsPage = array(
        //    'titlePage' => 1,
            'orient' => 'landscape',
        //    'top' => 4000,
        //    'bottom' => 4000,
        //    'right' => 4000,
        //    'left' => 4000
        );
        $docx->createDocx($filepath,$paramsPage);
        //output the results
        $data = file_get_contents($filepath.'.docx');
        $len = strlen($data);
        //header("Content-type: application/vnd.ms-word");
        header('Content-type: application/vnd.openxmlformats-officedocument.wordprocessingml.document');
        //header('Content-Type: application/force-download');
        header('Content-length: '.$len);
        header("Content-Disposition: attachment; filename=\"$filename.docx\"");
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0,pre-check=0');
        header('Pragma: public');
        echo $data;
        return true;
    }
}