/application/controllers/Statistics_userController.php

<?php
/*
 * LimeSurvey
 * Copyright (C) 2007-2011 The LimeSurvey Project Team / Carsten Schmitz
 * All rights reserved.
 * License: GNU/GPL License v2 or later, see LICENSE.php
 * LimeSurvey is free software. This version may have been modified pursuant
 * to the GNU General Public License, and as distributed it includes or
 * is derivative of works licensed under the GNU General Public License or
 * other free or open source software licenses.
 * See COPYRIGHT.php for copyright notices and details.
 *
 *	$Id$
 */

/*
 * Created 12-2008 by Maziminke (maziminke@web.de)
 *
 * This file handles the "Show results to users" option:
 * Survey Settings -> Presentation & navigation -> "Public statistics?"
 *
 * The admin can set a question attribute "public_statistics" for each question
 * to determine whether the results of a certain question should be shown to the user
 * after he/she has submitted the survey.
 *
 * See http://docs.limesurvey.org/tiki-index.php?page=Question+attributes#public_statistics
 */

class Statistics_userController extends LSYii_Controller {


	public function _remap($method, $params = array())
	{
		array_unshift($params, $method);
	    return call_user_func_array(array($this, "action"), $params);
	}

	function actionAction($surveyid,$language)
	{
		$iSurveyID=(int)$surveyid;
        //$postlang = returnglobal('lang');
		Yii::import('application.libraries.admin.progressbar',true);
		Yii::app()->loadHelper("admin/statistics");
		Yii::app()->loadHelper('database');
		Yii::app()->loadHelper('surveytranslator');

		$data = array();

		//XXX enable/disable this for testing
		//$publicgraphs = 1;
		//$showaggregateddata = 1;

		/*
		 * List of important settings:
		 * - publicstatistics: General survey setting which determines if public statistics for this survey
		 * 	 should be shown at all.
		 *
		 * - publicgraphs: General survey setting which determines if public statistics for this survey
		 * 	 should include graphs or only show a tabular overview.
		 *
		 * - public_statistics: Question attribute which has to be applied to each question so that
		 * 	 its statistics will be shown to the user. If not set no statistics for this question will be shown.
		 *
		 * - filterout_incomplete_answers: Setting taken from config-defaults.php which determines if
		 * 	 not completed answers will be filtered.
		 */

		if(!isset($iSurveyID))
		{
			$iSurveyID=returnGlobal('sid');
		}
		else
		{
			$iSurveyID = (int) $iSurveyID;
		}
		if (!$iSurveyID)
		{
		    //This next line ensures that the $iSurveyID value is never anything but a number.
		    safeDie('You have to provide a valid survey ID.');
		}


		if ($iSurveyID)
		{
		    $actresult = Survey::model()->findAll('sid = :sid AND active = :active', array(':sid' => $iSurveyID, ':active' => 'Y'));      //Checked
		    if (count($actresult) == 0)
		    {
			    safeDie('You have to provide a valid survey ID.');
			}
		    else
		    {
		        $surveyinfo = getSurveyInfo($iSurveyID);
		        // CHANGE JSW_NZ - let's get the survey title for display
		        $thisSurveyTitle = $surveyinfo["name"];
		        // CHANGE JSW_NZ - let's get css from individual template.css - so define path
		        $thisSurveyCssPath = getTemplateURL($surveyinfo["template"]);
		        if ($surveyinfo['publicstatistics']!='Y')
		        {
		            safeDie('The public statistics for this survey are deactivated.');
		        }

		        //check if graphs should be shown for this survey
		        if ($surveyinfo['publicgraphs']=='Y')
		        {
		            $publicgraphs = 1;
		        }
		        else
		        {
		            $publicgraphs = 0;
		        }
		    }
		}

		//we collect all the output within this variable
		$statisticsoutput ='';


		//for creating graphs we need some more scripts which are included here
		//True -> include
		//False -> forget about charts
		if (isset($publicgraphs) && $publicgraphs == 1)
		{
		    require_once(APPPATH.'third_party/pchart/pchart/pChart.class');
		    require_once(APPPATH.'third_party/pchart/pchart/pData.class');
		    require_once(APPPATH.'third_party/pchart/pchart/pCache.class');

		    $MyCache = new pCache(Yii::app()->getConfig("tempdir").DIRECTORY_SEPARATOR);
		    //$currentuser is created as prefix for pchart files
		    if (isset($_SERVER['REDIRECT_REMOTE_USER']))
		    {
		        $currentuser=$_SERVER['REDIRECT_REMOTE_USER'];
		    }
		    else if (session_id())
		    {
		        $currentuser=substr(session_id(), 0, 15);
		    }
		    else
		    {
		        $currentuser="standard";
		    }
		}


		// Set language for questions and labels to base language of this survey
		if (isset($postlang) && $postlang != null )
            $language = $postlang;
        else
            $language = Survey::model()->findByPk($iSurveyID)->language;


		//set survey language for translations
		$clang = SetSurveyLanguage($iSurveyID, $language);


		//Create header (fixes bug #3097)
		$surveylanguage= $language;
		sendCacheHeaders();
		$condition = false;
		$sitename = Yii::app()->getConfig("sitename");

		$data['surveylanguage'] = $surveylanguage;
		$data['sitename'] = $sitename;
		$data['condition'] = $condition;
		$data['thisSurveyCssPath'] = $thisSurveyCssPath;

		/*
		 * only show questions where question attribute "public_statistics" is set to "1"
		 */

        $query = "SELECT q.* , group_name, group_order FROM {{questions}} q, {{groups}} g, {{question_attributes}} qa 
                    WHERE g.gid = q.gid AND g.language = :lang1 AND q.language = :lang2 AND q.sid = :surveyid AND q.qid = qa.qid AND q.parent_qid = 0 AND qa.attribute = 'public_statistics'";
        $databasetype = Yii::app()->db->getDriverName();
        if ($databasetype=='mssql' || $databasetype=="sqlsrv")
        {
            $query .=" AND CAST(CAST(qa.value as varchar) as int)='1'\n";
        }
        else
        {
            $query .=" AND qa.value='1'\n";
        }

		//execute query
		$result = Yii::app()->db->createCommand($query)->bindParam(":lang1", $language, PDO::PARAM_STR)->bindParam(":lang2", $language, PDO::PARAM_STR)->bindParam(":surveyid", $iSurveyID, PDO::PARAM_INT)->queryAll();

		//store all the data in $rows
		$rows = $result;


		//SORT IN NATURAL ORDER!
		usort($rows, 'groupOrderThenQuestionOrder');

		//put the question information into the filter array
		foreach ($rows as $row)
		{
		    //store some column names in $filters array
		    $filters[]=array($row['qid'],
		    $row['gid'],
		    $row['type'],
		    $row['title'],
		    $row['group_name'],
		    flattenText($row['question']));
		}

		//number of records for this survey
		$totalrecords = 0;

		//count number of answers
		$query = "SELECT count(*) FROM {{survey_".intval($iSurveyID)."}}";

		//if incompleted answers should be filtert submitdate has to be not null
		//this setting is taken from config-defaults.php
		if (Yii::app()->getConfig("filterout_incomplete_answers") == true)
		{
		    $query .= " WHERE {{survey_".intval($iSurveyID)."}}.submitdate is not null";
		}
		$result = Yii::app()->db->createCommand($query)->queryAll();

		//$totalrecords = total number of answers
		foreach($result as $row)
		{
		    $totalrecords = reset($row);
		}


		//this is the array which we need later...
		$summary = array();
		//...while this is the array from copy/paste which we don't want to replace because this is a nasty source of error
		$allfields = array();


		//---------- CREATE SGQA OF ALL QUESTIONS WHICH USE "PUBLIC_STATISTICS" ----------

		        /*
		 * let's go through the filter array which contains
		 * 	['qid'],
		 ['gid'],
		 ['type'],
		 ['title'],
		 ['group_name'],
		 ['question'];
		         */

		$currentgroup='';
		// use to check if there are any question with public statistics
		if(isset($filters)){
		foreach ($filters as $flt)
		{
		    //SGQ identifier
		    $myfield = "{$iSurveyID}X{$flt[1]}X{$flt[0]}";

		    //let's switch through the question type for each question
		    switch ($flt[2])
		    {
		        case "K": // Multiple Numerical
		        case "Q": // Multiple Short Text
		            //get answers
		            $query = "SELECT title as code, question as answer FROM {{questions}} WHERE parent_qid=:flt_0 AND language = :lang ORDER BY question_order";
		            $result =  Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();

		            //go through all the (multiple) answers
		            foreach($result as $row)
		            {
		                $myfield2=$flt[2].$myfield.reset($row);
		                $allfields[] = $myfield2;
		            }
		            break;
		        case "A": // ARRAY OF 5 POINT CHOICE QUESTIONS
		        case "B": // ARRAY OF 10 POINT CHOICE QUESTIONS
		        case "C": // ARRAY OF YES\No\$clang->gT("Uncertain") QUESTIONS
		        case "E": // ARRAY OF Increase/Same/Decrease QUESTIONS
		        case "F": // FlEXIBLE ARRAY
		        case "H": // ARRAY (By Column)
		            //get answers
		            $query = "SELECT title as code, question as answer FROM {{questions}} WHERE parent_qid=:flt_0 AND language = :lang ORDER BY question_order";
		            $result = Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();

		            //go through all the (multiple) answers
		            foreach($result as $row)
		            {
		                $myfield2 = $myfield.reset($row);
		                $allfields[]=$myfield2;
		            }
		            break;
		        // all "free text" types (T, U, S)  get the same prefix ("T")
		        case "T": // Long free text
		        case "U": // Huge free text
		        case "S": // Short free text
		            $myfield="T$myfield";
		            $allfields[] = $myfield;
		            break;
		        case ";":  //ARRAY (Multi Flex) (Text)
		        case ":":  //ARRAY (Multi Flex) (Numbers)
                    $query = "SELECT title, question FROM {{questions}} WHERE parent_qid=:flt_0 AND language=:lang AND scale_id = 0 ORDER BY question_order";
		            $result = Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();
		            foreach($result as $row)
		            {
		                $fquery = "SELECT * FROM {{questions}} WHERE parent_qid = :flt_0 AND language = :lang AND scale_id = 1 ORDER BY question_order, title";
		                $fresult = Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();
		                foreach($fresult as $frow)
		                {
		                    $myfield2 = $myfield . reset($row) . "_" . $frow['title'];
		                $allfields[]=$myfield2;
		            }
		            }
		            break;
		        case "R": //RANKING
		            //get some answers
		            $query = "SELECT code, answer FROM {{answers}} WHERE qid = :flt_0 AND language = :lang ORDER BY sortorder, answer";
		            $result = Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();

		            //get number of answers
		            $count = count($result);

		            //loop through all answers. if there are 3 items to rate there will be 3 statistics
		            for ($i=1; $i<=$count; $i++)
		            {
		                $myfield2 = "R" . $myfield . $i . "-" . strlen($i);
		                $allfields[]=$myfield2;
		            }
		            break;
		        //Boilerplate questions are only used to put some text between other questions -> no analysis needed
		        case "X":  //This is a boilerplate question and it has no business in this script
		            break;
		        case "1": // MULTI SCALE
		            //get answers
		            $query = "SELECT title, question FROM {{questions}} WHERE parent_qid = :flt_0 AND language = :lang ORDER BY question_order";
		            $result = Yii::app()->db->createCommand($query)->bindParam(":flt_0", $flt[0], PDO::PARAM_INT)->bindParam(":lang", $language, PDO::PARAM_STR)->queryAll();

		            //loop through answers
		            foreach($result as $row)
		            {
		                //----------------- LABEL 1 ---------------------
		                $myfield2 = $myfield . $row['title']."#0";
		                $allfields[]=$myfield2;
		                //----------------- LABEL 2 ---------------------
		                $myfield2 = $myfield . $row['title']."#1";
		                $allfields[]=$myfield2;
		            }	//end WHILE -> loop through all answers
		            break;

		        case "P":  //P - Multiple choice with comments
		        case "M":  //M - Multiple choice
		        case "N":  //N - Numerical input
		        case "D":  //D - Date
		            $myfield2 = $flt[2].$myfield;
		                    $allfields[]=$myfield2;
		            break;
		        default:   //Default settings
		            $allfields[] = $myfield;
		            break;

		    }	//end switch -> check question types and create filter forms
		}
		//end foreach -> loop through all questions with "public_statistics" enabled
		}// end if -> for removing the error message in case there are no filters
		$summary = $allfields;

        
        // Get the survey inforamtion
        $thissurvey = getSurveyInfo($surveyid,$language);

        //SET THE TEMPLATE DIRECTORY
        if (!isset($thissurvey['templatedir']) || !$thissurvey['templatedir'])
        {
            $data['sTemplatePath'] = validateTemplateDir("default");
        }
        else
        {
            $data['sTemplatePath'] = validateTemplateDir($thissurvey['templatedir']);
        }
        
        
		//---------- CREATE STATISTICS ----------
        $redata = compact(array_keys(get_defined_vars()));
        doHeader();
        echo templatereplace(file_get_contents(getTemplatePath(validateTemplateDir($data['sTemplatePath'])).DIRECTORY_SEPARATOR."startpage.pstpl"),array(), $redata);


		//some progress bar stuff

		// Create progress bar which is shown while creating the results
		$prb = new ProgressBar();
		$prb->pedding = 2;	// Bar Pedding
		$prb->brd_color = "#404040 #dfdfdf #dfdfdf #404040";	// Bar Border Color

		$prb->setFrame();	// set ProgressBar Frame
		$prb->frame['left'] = 50;	// Frame position from left
		$prb->frame['top'] = 	80;	// Frame position from top
		$prb->addLabel('text','txt1',$clang->gT("Please wait ..."));	// add Text as Label 'txt1' and value 'Please wait'
		$prb->addLabel('percent','pct1');	// add Percent as Label 'pct1'
		$prb->addButton('btn1',$clang->gT('Go back'),'?action=statistics&amp;sid='.$iSurveyID);	// add Button as Label 'btn1' and action '?restart=1'

		//progress bar starts with 35%
		$process_status = 35;
		$prb->show();	// show the ProgressBar


		// 1: Get list of questions with answers chosen
		//"Getting Questions and Answers ..." is shown above the bar
		$prb->setLabelValue('txt1',$clang->gT('Getting questions and answers ...'));
		$prb->moveStep(5);

		// creates array of post variable names
		for (reset($_POST); $key=key($_POST); next($_POST))
		{
		    $postvars[]=$key;
		}
		$data['thisSurveyTitle'] = $thisSurveyTitle;
		$data['totalrecords'] = $totalrecords;
		$data['clang'] = $clang;
		$data['summary'] = $summary;
		//show some main data at the beginnung
		// CHANGE JSW_NZ - let's allow html formatted questions to show


		//push progress bar from 35 to 40
		$process_status = 40;

		//Show Summary results
		if (isset($summary) && $summary)
		{
		    //"Generating Summaries ..." is shown above the progress bar
		    $prb->setLabelValue('txt1',$clang->gT('Generating summaries ...'));
		    $prb->moveStep($process_status);

		    //let's run through the survey // Fixed bug 3053 with array_unique
		    $runthrough=array_unique($summary);

		    //loop through all selected questions
		    foreach ($runthrough as $rt)
		    {

		        //update progress bar
		        if ($process_status < 100) $process_status++;
		        $prb->moveStep($process_status);

		    }	// end foreach -> loop through all questions

            $helper = new statistics_helper();
		    $statisticsoutput .= $helper->generate_statistics($iSurveyID, $summary, $summary, $publicgraphs, 'html', null,$language,false);

		}	//end if -> show summary results

        $data['statisticsoutput']=$statisticsoutput;
		//done! set progress bar to 100%
		if (isset($prb))
		{
		    $prb->setLabelValue('txt1',$clang->gT('Completed'));
		    $prb->moveStep(100);
		    $prb->hide();
		}

        $redata = compact(array_keys(get_defined_vars()));
        $data['redata'] = $redata;
        header_includes('statistics_user.js');
		$this->render('/statistics_user_view',$data);

		//output footer
		echo getFooter();

		//Delete all Session Data
		Yii::app()->session['finished'] = true;
	}

}