JezK

Edit File: Groupperformance.php

<?php

class Groupperformance extends AppModel
{
    public $validationDomain = 'validation';
    public $useTable = "exam_results";

public function userGroupTestName($studentId)
    {
        $Exam = ClassRegistry::init('Exam');
        $testName = $Exam->find('all', array('fields' => array('Exam.id', 'Exam.name'),
            'joins' => array(array('table' => 'exam_groups', 'alias' => 'ExamGroup', 'type' => 'Inner',
                'conditions' => array('Exam.id=ExamGroup.exam_id', '')),
                array('table' => 'student_groups', 'alias' => 'StudentGroup', 'type' => 'Inner',
                    'conditions' => array('StudentGroup.group_id=ExamGroup.group_id'))),
            'conditions' => array('Exam.status' => 'Closed', "StudentGroup.student_id=$studentId"),
            'order' => array('Exam.start_date' => 'asc'),
            'group' => array('Exam.id')));
        return $testName;
    }

public function userAveragePerformance($examId, $studentId)
    {
        $totalAttempt = $this->find('count', array('conditions' => array('Groupperformance.exam_id' => $examId, 'Groupperformance.student_id' => $studentId)));
        $this->virtualFields = array('total_percent' => 'SUM(Groupperformance.percent)');
        $totalPercentArr = $this->find('first', array('fields' => array('total_percent'),
            'conditions' => array('Groupperformance.exam_id' => $examId, 'Groupperformance.student_id' => $studentId)));
        $totalPercent = $totalPercentArr['Groupperformance']['total_percent'];
        if ($totalAttempt > 0) {
            $averagePercent = CakeNumber::precision($totalPercent / $totalAttempt, 2);
        } else
            $averagePercent = 0;
        return (float)$averagePercent;
    }

public function userGroupAveragePerformance($examId)
    {
        $totalAttempt = $this->find('count', array('conditions' => array('Groupperformance.exam_id' => $examId)));
        $this->virtualFields = array('total_percent' => 'SUM(Groupperformance.percent)');
        $totalPercentArr = $this->find('first', array('fields' => array('total_percent'),
            'conditions' => array('Groupperformance.exam_id' => $examId)));
        $totalPercent = $totalPercentArr['Groupperformance']['total_percent'];
        if ($totalAttempt > 0) {
            $averagePercent = CakeNumber::precision($totalPercent / $totalAttempt, 2);
        } else
            $averagePercent = 0;
        return (float)$averagePercent;
    }

public function userPerformance($studentId)
    {
        $testName = $this->userGroupTestName($studentId);
        $userPerformance = array();
        $userGroupPerformance = array();
        foreach ($testName as $testValue) {
            $userPerformance[] = $this->userAveragePerformance($testValue['Exam']['id'], $studentId);
            $userGroupPerformance[] = $this->userGroupAveragePerformance($testValue['Exam']['id']);
        }
        return array($userPerformance, $userGroupPerformance);
    }
}

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