<?php
if (!defined('BASEPATH'))
    exit('No direct script access allowed');

class Student extends EduAppGT
{
    /*
        Software: EduAppGT PRO - School Management System
        Author: GuateApps - Software, Web and Mobile developer.
        Author URI: https://guateapps.app.
        PHP: 5.6+
        Created: 27 September 16.
    */
    
    function __construct()
    {
        parent::__construct();
        $this->load->database();
        $this->load->library('session');
        $this->output->set_header('Last-Modified: ' . gmdate("D, d M Y H:i:s") . ' GMT');
        $this->output->set_header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
        $this->output->set_header('Pragma: no-cache');
        $this->output->set_header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
    }

    //Live classes function.
    function meet($task = "", $document_id = "")
    {
        $this->isStudent();
        $data['page_name']              = 'meet';
        $data['data']              = $task;
        $data['page_title']             = getEduAppGTLang('live');
        $this->load->view('backend/index', $data);
    }
    
    //Update delivery function.
    function homework_edit($param1 = "", $param2 = "")
    {
        $this->isStudent();
        $data['page_name']         = 'homework_edit';
        $data['delivery_id']       = base64_decode($param1);
        $data['page_title']        = getEduAppGTLang('edit_delivery');
        $this->load->view('backend/index', $data);
    }
    
    //Enter to Live Class function.
    function liveClass($param1 = '', $param2 = '')
    {
        $this->isStudent();
        $live_id  = base64_decode($param1);
        $url = $this->db->get_where('live', array('live_id' => $live_id))->row()->siteUrl;
        $this->crud->saveLiveAttendance($live_id);
        if($liveType == 2){
            header('Location: '.$url.'');
        }   else{
            redirect(base_url() . 'student/live/'.base64_encode($live_id), 'refresh');
        }
    }
    
    //Student progress function.
    function progress($task = "", $document_id = "")
    {
        $this->isStudent();
        $data['page_name']              = 'progress';
        $data['page_title']             = getEduAppGTLang('progress');
        $this->load->view('backend/index', $data);
    }
    
    //Live Class Function.
    function live($task = "", $document_id = "")
    {
        $this->isStudent();
        $_id = base64_decode($task);
        $this->crud->saveLiveStatus($_id);
        $data['page_name']              = 'live';
        $data['live_id']                = $task;
        $data['page_title']             = getEduAppGTLang('live');
        $this->load->view('backend/index', $data);
    }
    
    //Create teacher report function.
    function listado_de_reportes($param1 = '', $param2 = '', $param3 = '') 
    {
        $this->isStudent();
        if ($param1 == 'create')
        {
            $this->crud->createTeacherReport();
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('successfully_added'));
            redirect(base_url() . 'student/send_report/', 'refresh');
        }
    }
    
    //Marks print view function.
    function marks_print_view($student_id , $exam_id = '') 
    {
        $this->isStudent();
        $ex = explode('-', base64_decode($student_id));
        $class_id     = $this->db->get_where('enroll' , array('student_id' => $this->session->userdata('login_user_id'), 'year' => $this->db->get_where('settings' , array('type' => 'running_year'))->row()->description))->row()->class_id;

        $page_data['student_id'] =   $student_id;
        $page_data['class_id']   =   $class_id;
        $page_data['exam_id']    =   $exam_id;
        $this->load->view('backend/student/marks_print_view', $page_data);
    }
    
    //Submit online exam function.
    function submit_online_exam($online_exam_id = "")
    {
        $this->isStudent();
        $this->academic->submitExam($online_exam_id);
        redirect(base_url() . 'student/online_exams/'.$this->input->post('datainfo').'/', 'refresh');
    }
    
    //View online exam result function.
    function online_exam_result($param1 = '', $param2 = '') 
    {
        $this->isStudent();
        //Online exam validator
        $results      = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->results;
        $exam_date    = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->exam_date;
        $time_start   = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->time_start;
        $time_end     = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->time_end;
        $classId      = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->class_id;
        $sectionId    = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->section_id;
        $subjectId    = $this->db->get_where('online_exam', array('online_exam_id' => $param1))->row()->subject_id;
        $redirect = base64_encode($classId.'-'.$sectionId.'-'.$subjectId);
        if($results == 3){
            $addMinutes = 15;   
        }elseif($results == 4){
            $addMinutes = 30;
        }
        $current_time          = time();
        $exam_start_time       = strtotime(date('Y-m-d', $exam_date).' '.$time_start);
        $exam_end_time         = strtotime(date('Y-m-d', $exam_date).' '.$time_end);
        
        $startResult           = strtotime($time_end);
        $endResult             = $addMinutes*60;
        $newResult             = date("H:i",$startResult+$endResult).':00';
        $exam_end_time_results = strtotime(date('Y-m-d', $exam_date).' '.$newResult);
        
        if($results == 0 || $results == 1){
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('ask_for_results'));
            redirect(base_url() . 'student/online_exams/'.$redirect, 'refresh');
        }
        elseif($current_time < $exam_end_time && $current_time < $exam_end_time_results && $results != 2){
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('waiting_for_results'));
            redirect(base_url() . 'student/online_exams/'.$redirect, 'refresh');
        }
        //Online exam validator.                                  
        $page_data['page_name'] = 'online_exam_result';
        $page_data['param2'] = $param1;
        $page_data['page_title'] = getEduAppGTLang('online_exam_results');
        $this->load->view('backend/index', $page_data);
    }
    
    //Take online exam function.
    function take_online_exam($param1  = '', $param2 = '') 
    {
        $this->isStudent();
        if($param1 == 'start')
        {
            $password = md5($this->db->get_where('online_exam', array('code' => html_escape($this->input->post('rand'))))->row()->password);
            $user_password = md5($this->input->post('password'));
            if($password == $user_password)
            {
                $online_exam_id = $this->db->get_where('online_exam', array('code' => html_escape($this->input->post('rand'))))->row()->online_exam_id;
                $student_id = $this->session->userdata('login_user_id');
                $check = array('student_id' => $student_id, 'online_exam_id' => $online_exam_id);
                $taken = $this->db->where($check)->get('online_exam_result')->num_rows();
                $this->crud->change_online_exam_status_to_attended_for_student($online_exam_id);

                $status = $this->crud->check_availability_for_student($online_exam_id);
                if ($status == 'submitted'){
                    $page_data['page_name']  = 'page_not_found';
                }
                else{
                    $page_data['page_name']  = 'online_exam_take';
                }
            }else{
                $this->session->set_flashdata('flash_message' , getEduAppGTLang('password_does_not_match'));
                redirect(base_url() . 'student/examroom/'.$this->input->post('rand'), 'refresh');
            }
        }
        $page_data['page_title'] = getEduAppGTLang('online_exam');
        $page_data['online_exam_id'] = $online_exam_id;
        $page_data['exam_info'] = $this->db->get_where('online_exam', array('online_exam_id' => $online_exam_id));
        $this->load->view('backend/index', $page_data);
    }
    
    //Index function.
    public function index()
    {
        if ($this->session->userdata('student_login') != 1)
        {
            redirect(base_url(), 'refresh');
        }else{
            redirect(base_url().'student/panel/', 'refresh');
        }
    }
    
    //Subject dashboard function
    function subject_dashboard($data  = '') 
    {
        $this->isStudent();
        $page_data['data'] = $data;
        $page_data['page_name']    = 'subject_dashboard';
        $page_data['page_title']   = getEduAppGTLang('subject_dashboard');
        $this->load->view('backend/index',$page_data);
    }
    
    //Birthdays function.
    function birthdays()
    {
        $this->isStudent();
        $page_data['page_name']  = 'birthdays';
        $page_data['page_title'] = getEduAppGTLang('birthdays');
        $this->load->view('backend/index', $page_data);
    }
    
    //Calendar function.
    function calendar($param1 = '', $param2 = '')
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $page_data['page_name']  = 'calendar';
        $page_data['page_title'] = getEduAppGTLang('calendar');
        $page_data['code']   = $code;
        $this->load->view('backend/index', $page_data); 
    }
    
    //Chat group function.
    function group($param1 = "group_message_home", $param2 = "")
    {
        $this->isStudent();
        if ($param1 == 'group_message_read') 
        {
            $page_data['current_message_thread_code'] = $param2;
        }
        else if($param1 == 'send_reply')
        {
            $this->crud->send_reply_group_message($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('message_sent'));
            redirect(base_url() . 'student/group/group_message_read/'.$param2, 'refresh');
        }
        $page_data['message_inner_page_name']   = $param1;
        $page_data['page_name']                 = 'group';
        $page_data['page_title']                = getEduAppGTLang('message_group');
        $this->load->view('backend/index', $page_data);
    }

    //Submit poll response function
    function polls($param1 = '', $param2 = '')
    {
        $this->isStudent();
        if($param1 == 'response')
        {
            $this->crud->pollReponse();
        }
    }

    //Take online exam function.
    function take($exam_code  = '')
    {
        $this->isStudent();
        $page_data['questions'] = $this->db->get_where('questions' , array('exam_code' => $exam_code))->result_array();
        if($this->db->get_where('student_question',array('exam_code'=>$exam_code,'student_id'=>$this->session->userdata('login_user_id')))->row()->answered == 'answered')
        {
            redirect(base_url() . 'student/online_exams/', 'refresh');
        } 
        $page_data['exam_code'] = $exam_code;
        $page_data['page_name']   = 'take'; 
        $page_data['page_title']  = "";
        $this->load->view('backend/index', $page_data);
    }

    //Attendance report function.
    function attendance_report($data = '',$month = '', $year = '') 
    {
        $this->isStudent();
        $page_data['month']        = $month;
        $page_data['data']         = $data;
        $page_data['year']         = $year;
        $page_data['page_name']    = 'attendance_report';
        $page_data['page_title']   = getEduAppGTLang('attendance_report');
        $this->load->view('backend/index',$page_data);
    }

    //Exam room function.
    function examroom($online_exam_code = "") 
    {
        $this->isStudent();
        $online_exam_id = $this->db->get_where('online_exam', array('code' => $online_exam_code))->row()->online_exam_id;
        $class_id = $this->db->get_where('online_exam', array('code' => $online_exam_code))->row()->class_id;
        $section_id = $this->db->get_where('online_exam', array('code' => $online_exam_code))->row()->section_id;
        $subject_id = $this->db->get_where('online_exam', array('code' => $online_exam_code))->row()->subject_id;
        $student_id = $this->session->userdata('login_user_id');
        $check = array('student_id' => $student_id, 'online_exam_id' => $online_exam_id);
        $taken = $this->db->where($check)->get('online_exam_result')->num_rows();
        $this->crud->change_online_exam_status_to_attended_for_student($online_exam_id);
        $status = $this->crud->check_availability_for_student($online_exam_id);
        if ($status == 'submitted')
        {
            redirect(base_url() . 'student/online_exams/'.base64_encode($class_id.'-'.$section_id.'-'.$subject_id).'/', 'refresh');
        }
        else{
            $page_data['page_name']    = 'examroom';
        }
        $page_data['code'] = $online_exam_code;
        $page_data['page_title']   = getEduAppGTLang('take_exam');
        $this->load->view('backend/index',$page_data);
    }

    //Exam function.
    function exam($code = "") 
    { 
        $this->isStudent();
        $page_data['questions'] = $this->db->get_where('questions' , array('exam_code' => $code))->result_array();
        if($this->db->get_where('student_question',array('exam_code'=>$code,'student_id'=>$this->session->userdata('login_user_id')))->row()->answered == 'answered')
        {
            redirect(base_url() . 'student/online_exams/', 'refresh');
        } 
        $page_data['exam_code'] = $code; 
        $page_data['page_name']    = 'exam';
        $page_data['page_title']   = getEduAppGTLang('online_exam');
        $this->load->view('backend/index',$page_data);
     }

    //Exam results function.
    function exam_results($code = '') 
    {
        $this->isStudent();
        $page_data['exam_code'] = $code;
        $page_data['page_name']     = 'exam_results';
        $page_data['page_title']    = getEduAppGTLang('exam_results');
        $this->load->view('backend/index', $page_data);
    }
    
    //Print marks function.
    function print_marks() 
    {
        $this->isStudent();
        $page_data['month']        = date('m');
        $page_data['page_name']    = 'print_marks';
        $page_data['page_title']   = "";
        $this->load->view('backend/index',$page_data);
    }

    //Subject marks function.
    function subject_marks($data  = '', $param2  = '') 
    {
        $this->isStudent();
        if($param2 != ""){
            $page = $param2;
        }else{
            $page = $this->db->get('exam')->first_row()->exam_id;
        }
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $page_data['exam_id'] = $page;
        $page_data['data'] = $data;
        $page_data['page_name']    = 'subject_marks';
        $page_data['page_title']   =  getEduAppGTLang('subject_marks');
        $this->load->view('backend/index',$page_data);
    }

    //View invoice function.
    function view_invoice($id  = '') 
    {
        $this->isStudent();
        $page_data['invoice_id'] = $id;
        $page_data['page_name']    = 'view_invoice';
        $page_data['page_title']   = getEduAppGTLang('invoice');
        $this->load->view('backend/index',$page_data);
    }

    //View behavior report function.
    function view_report($code  = '') 
    {
        $this->isStudent();
        $page_data['code'] = $code;
        $page_data['page_name']    = 'view_report';
        $page_data['page_title']   = getEduAppGTLang('view_report');
        $this->load->view('backend/index',$page_data);
    }

    //My Profile function.
    function my_profile($param1 = '', $param2 = '') 
    {
        $this->isStudent();
        if($param1 == 'remove_facebook')
        {
            $this->user->removeFacebook();
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('facebook_delete'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }
        if($param1 == '1')
        {
            $this->session->set_flashdata('error_message' , getEduAppGTLang('google_err'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }
        if($param1 == '3')
        {
            $this->session->set_flashdata('error_message' , getEduAppGTLang('facebook_err'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }
        if($param1 == '2')
        {
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('google_true'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }
        if($param1 == '4')
        {
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('facebook_true'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }  
        if($param1 == 'remove_google')
        {
            $this->user->removeGoogle();
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('google_delete'));
            redirect(base_url() . 'student/my_profile/', 'refresh');
        }
        if($param1 == 'update')
        {
            $this->user->updateCurrentStudent();
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('successfully_updated'));
            redirect(base_url().'student/student_update/','refresh');
        }
        $page_data['output']       = $this->crud->getGoogleURL();
        $page_data['page_name']    = 'my_profile';
        $page_data['page_title']   = getEduAppGTLang('profile');
        $this->load->view('backend/index',$page_data);
     }

    //Attendance report selectior.
    function attendance_report_selector()
    {
        $this->isStudent();
        $data['year']       = $this->input->post('year');
        $data['month']      = $this->input->post('month');
        $data['data']       = $this->input->post('data');
        redirect(base_url().'student/attendance_report/'.$data['data'].'/'.$data['month'].'/'.$data['year'],'refresh');
    }

    //Student dashboard function.
    function panel()
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $page_data['page_name']  = 'panel';
        $page_data['page_title'] = getEduAppGTLang('dashboard');
        $this->load->view('backend/index', $page_data);
    }
    
    //Teachers function.
    function teachers($param1 = '', $param2 = '', $param3 = '')
    {
        $this->isStudent();
        $page_data['page_name']  = 'teachers';
        $page_data['page_title'] = getEduAppGTLang('teachers');
        $this->load->view('backend/index', $page_data);
    }
    
    //Subject function.
    function subject($param1 = '', $param2 = '')
    {
        $this->isStudent();
        $student_profile         = $this->db->get_where('student', array('student_id' => $this->session->userdata('student_id')))->row();
        $student_class_id        = $this->db->get_where('enroll' , array('student_id' => $student_profile->student_id,'year' => $this->db->get_where('settings' , array('type' => 'running_year'))->row()->description
        ))->row()->class_id;
        $page_data['subjects']   = $this->db->get_where('subject', array('class_id' => $student_class_id,'year' => $this->db->get_where('settings' , array('type' => 'running_year'))->row()->description))->result_array();
        $page_data['page_name']  = 'subject';
        $page_data['page_title'] = getEduAppGTLang('subjects');
        $this->load->view('backend/index', $page_data);
    }
    
    //My Marks function.
    function my_marks($student_id = '') 
    {
        $this->isStudent();
        $student = $this->db->get_where('student' , array('student_id' => $student_id))->result_array();
        foreach ($student as $row)
        {
            if($row['student_id'] == $this->session->userdata('login_user_id'))
            {
                $page_data['student_id'] =   $student_id;
            } else if($row['parent_id'] != $this->session->userdata('login_user_id'))
            {
                redirect(base_url(), 'refresh');
            }
        }
        $class_id     = $this->db->get_where('enroll' , array('student_id' => $student_id , 'year' => $this->db->get_where('settings' , array('type' => 'running_year'))->row()->description))->row()->class_id;
        $page_data['page_name']  =   'my_marks';
        $page_data['page_title'] =   getEduAppGTLang('marks');
        $page_data['class_id']   =   $class_id;
        $this->load->view('backend/index', $page_data);
    }
    
    //Class routine function.
    function class_routine($param1 = '', $param2 = '', $param3 = '')
    {
        $this->isStudent();
        $student_profile         = $this->db->get_where('student', array('student_id' => $this->session->userdata('student_id')))->row();
        $page_data['class_id']   = $this->db->get_where('enroll' , array('student_id' => $student_profile->student_id,'year' => $this->db->get_where('settings' , array('type' => 'running_year'))->row()->description))->row()->class_id;
        $page_data['student_id'] = $student_profile->student_id;
        $page_data['page_name']  = 'class_routine';
        $page_data['page_title'] = getEduAppGTLang('class_routine');
        $this->load->view('backend/index', $page_data);
    }

    //Homework function.
    function homework($student_id = '')
    {
        $this->isStudent();
        $page_data['page_name']  = 'homework';
        $page_data['page_title'] = getEduAppGTLang('homework');
        $page_data['data']   = $student_id;
        $this->load->view('backend/index', $page_data);
    }

    //Manage online exams function.
    function online_exams($student_id = '')
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $info = base64_decode($student_id);
        $ex = explode('-', $info);
        $page_data['exams']      = $this->crud->available_exams($this->session->userdata('login_user_id'),$ex[2]);
        $page_data['data']       = $student_id;
        $page_data['page_name']  = 'online_exams';
        $page_data['page_title'] = getEduAppGTLang('online_exams');
        $page_data['student_id'] = $student_id;
        $this->load->view('backend/index', $page_data);
    }
    
    //Download book function.
    function descargar_libro($libro_code = '')
    {
        $this->isStudent();
        $file_name = $this->db->get_where('libreria', array('libro_code' => $libro_code))->row()->file_name;
        $this->load->helper('download');
        $data = file_get_contents("public/uploads/libreria/" . $file_name);
        $name = $file_name;
        force_download($name, $data);
    }

    //Invoices function.
    function invoice($param1 = '', $param2 = '', $param3 = '')
    {
        $this->isStudent();
        if ($param1 == 'make_payment') 
        {
            $this->payment->makePayPal();
        }
        if ($param1 == 'paypal_cancel') 
        {
            redirect(base_url() . 'student/invoice/', 'refresh');
        }
        $student_profile         = $this->db->get_where('student', array('student_id'   => $this->session->userdata('student_id')))->row();
        $student_id              = $student_profile->student_id;
        $page_data['invoices']   = $this->db->get_where('invoice', array('student_id' => $student_id))->result_array();
        $page_data['page_name']  = 'invoice';
        $page_data['page_title'] = getEduAppGTLang('invoice');
        $this->load->view('backend/index', $page_data);
    }
    
    //Student info function.
    function student_info($student_id  = '', $param1='')
    {
        $this->isStudent();
        $page_data['output']     = $this->crud->getGoogleURL();
        $page_data['page_name']  = 'student_info';
        $page_data['page_title'] =  getEduAppGTLang('student_portal');
        $page_data['student_id'] =  $student_id;
        $this->load->view('backend/index', $page_data);
    }

    //Student update info function.
    function student_update($student_id = '', $param1='')
    {
        $this->isStudent();
        $page_data['page_name']  = 'student_update';
        $page_data['output']     = $this->crud->getGoogleURL();
        $page_data['page_title'] =  getEduAppGTLang('student_portal');
        $page_data['student_id'] =  $student_id;
        $this->load->view('backend/index', $page_data);
    }
    
    //Manage notifications function.    
    function notifications() 
    {
        $this->isStudent();
        $page_data['page_name']  =  'notifications';
        $page_data['page_title'] =  getEduAppGTLang('your_notifications');
        $this->load->view('backend/index', $page_data);
    }

    //Send teacher report function.
    function send_report() 
    {
        $this->isStudent();
        $page_data['page_name'] = 'send_report';
        $page_data['page_title'] = getEduAppGTLang('teacher_report');
        $this->load->view('backend/index', $page_data);
    }

    //Noticeboard function.
    function noticeboard($param1 = '', $param2 = '') 
    {
        $this->isStudent();
        $page_data['page_name'] = 'noticeboard';
        $page_data['page_title'] = getEduAppGTLang('news');
        $this->load->view('backend/index', $page_data);
    }

    //Chat message function.
    function message($param1 = 'message_home', $param2 = '', $param3 = '') 
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        if ($param1 == 'send_new') 
        {
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('message_sent'));
            $message_thread_code = $this->crud->send_new_private_message();
            redirect(base_url() . 'student/message/message_read/' . $message_thread_code, 'refresh');
        }
        if ($param1 == 'send_reply') 
        {
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('reply_sent'));
            $this->crud->send_reply_message($param2);
            redirect(base_url() . 'student/message/message_read/' . $param2, 'refresh');
        }
        if ($param1 == 'message_read') 
        {
            $page_data['current_message_thread_code'] = $param2;
            $this->crud->mark_thread_messages_read($param2);
        }
        $page_data['infouser']                  = $param2;
        $page_data['message_inner_page_name']   = $param1;
        $page_data['page_name']                 = 'message';
        $page_data['page_title']                = getEduAppGTLang('private_message');
        $this->load->view('backend/index', $page_data);
    }
    
    //Study material function
    function study_material($task = "", $document_id = "")
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $data['page_name']              = 'study_material';
        $data['data']                   = $task;
        $data['page_title']             = getEduAppGTLang('study_material');
        $this->load->view('backend/index', $data);
    }

    //Manage library function.
    function library($param1 = '', $param2 = '', $param3 = '')
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        if ($param1 == "request")
        {
            $this->academic->requestStudentBook();
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/library/' . $param2, 'refresh');
        }
        $page_data['page_name']  = 'library';
        $page_data['page_title'] = getEduAppGTLang('library');
        $this->load->view('backend/index', $page_data);
    }

    //Homework detials function.
    function homeworkroom($param1 = '' , $param2 = '')
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        $page_data['homework_code'] = $param1;
        $page_data['page_name']   = 'homework_room'; 
        $page_data['page_title']  = getEduAppGTLang('homework');
        $this->load->view('backend/index', $page_data);
    }

    //Send homework function.
    function delivery($param1 = '', $param2 = '',$param3 = '')
    {
        $this->isStudent();
        if($param1 == 'file')
        {
            $this->academic->sendFileHomework($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/homeworkroom/' . $param2, 'refresh');
        }
        if($param1 == 'text')
        {
            $this->academic->sendTextHomework($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/homeworkroom/' . $param2, 'refresh');
        }
        if($param1 == 'update_text')
        {
            $this->academic->updateTextHomework($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/homeworkroom/' . $param3, 'refresh');
        }
        if($param1 == 'update_file')
        {
            $this->academic->updateFileHomework($param2,$param3);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/homeworkroom/' . $param3, 'refresh');
        }
        if($param1 == 'delete')
        {
            $this->academic->deleteFileHomework($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_deleted'));
            redirect(base_url() . 'student/homeworkroom/' . $param3, 'refresh');
        }
    }

    //Homework file function.
    function homework_file($param1 = '', $param2 = '', $param3 = '') 
    {
        $this->isStudent();
        $homework_code = $this->db->get_where('homework', array('homework_id'))->row()->homework_code;
        if ($param1 == 'upload')
        {
            $this->crud->upload_homework_file($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_updated'));
            redirect(base_url() . 'student/homeworkroom/file/' . $param2, 'refresh');
        }
        else if ($param1 == 'download')
        {
            $this->crud->download_homework_file($param2);
        }
    }

    //Forum function.
    function forumroom($param1 = '' , $param2 = '')
    {
        $this->isStudent();
        $page_data['post_code'] = $param1;
        $page_data['page_name']   = 'forum_room'; 
        $page_data['page_title']  = getEduAppGTLang('forum');
        $this->load->view('backend/index', $page_data);
    }

    //Create report message function.
    function create_report_message($code = '') 
    {
        $this->isStudent();
        $this->crud->createReportMessage();
    }  

    //Delete notifications function.
    function notification($param1 ='', $param2 = '')
    {
        $this->isStudent();
        if($param1 == 'delete')
        {
            $this->crud->deleteNotification($param2);
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_deleted'));
            redirect(base_url() . 'student/notifications/', 'refresh');
        }
    }

    //Create forum message function.
    function forum_message($param1 = '', $param2 = '', $param3 = '')
    {
        $this->isStudent();
        if ($param1 == 'add') 
        {
            $this->crud->create_post_message(html_escape($this->input->post('post_code'))); 
        }
    }

    //Forum page function.
    function forum($param1 = '', $param2 = '', $student_id = '') 
    {
        $this->isStudent();
        if ($param1 == 'create') 
        {
            $post_code = $this->crud->create_post();
            $this->session->set_flashdata('flash_message', getEduAppGTLang('successfully_added'));
            redirect(base_url() . 'student/forumroom/post/' . $post_code , 'refresh');
        }
        $page_data['page_name'] = 'forum';
        $page_data['page_title'] = getEduAppGTLang('forum');
        $page_data['data']   = $param1;
        $this->load->view('backend/index', $page_data);
    }
    
    //Request permission function.
    function request($param1 = "", $param2 = "")
    {
        $this->isStudent();
        parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);
        if(html_escape($_GET['id']) != "")
        {
            $notify['status'] = 1;
            $this->db->where('id', html_escape($_GET['id']));
            $this->db->update('notification', $notify);
        }
        if ($param1 == "create")
        {
            $this->crud->studentRequestPermission();
            $this->session->set_flashdata('flash_message' , getEduAppGTLang('successfully_added'));
            redirect(base_url() . 'student/request/', 'refresh');
        }
        $data['page_name']  = 'request';
        $data['page_title'] = getEduAppGTLang('permissions');
        $this->load->view('backend/index', $data);
    }
    
    //Check student session.
    function isStudent()
    {
        if ($this->session->userdata('student_login') != 1)
        {
            redirect(base_url(), 'refresh');
        }
    }
    
    //End of Student.php
}