<?php

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

class Session_model extends MY_Model {

    public function __construct() {
        parent::__construct();
    }

    public function get($id = null) {
        $this->db->select()->from('sessions');
        if ($id != null) {
            $this->db->where('id', $id);
        } else {
            $this->db->order_by('id');
        }
        $query = $this->db->get();
        if ($id != null) {
            return $query->row_array();
        } else {
            return $query->result_array();
        }
    }

    public function getAllSession() {
        $sql = "SELECT sessions.*, IFNULL(sch_settings.session_id, 0) as `active` FROM `sessions` LEFT JOIN sch_settings ON sessions.id=sch_settings.session_id";
        $query = $this->db->query($sql);
        return $query->result_array();
    }

    public function getPreSession($session_id) {
        $sql = "select * from sessions where id in (select max(id) from sessions where id < $session_id)";

        $query = $this->db->query($sql);
        return $query->row();
    }

    public function getStudentAcademicSession($student_id = null) {
        $this->db->select('sessions.*')->from('sessions');
        $this->db->join('student_session', 'sessions.id = student_session.session_id');
        $this->db->where('student_session.student_id', $student_id);
        $this->db->group_by('student_session.session_id'); 
        $this->db->order_by('sessions.id');
        $query = $this->db->get();
        return $query->result_array();
    }

    public function remove($id) {
		$this->db->trans_start(); # Starting Transaction
        $this->db->trans_strict(false); # See Note 01. If you wish can remove as well
        //=======================Code Start===========================
        $this->db->where('id', $id);
        $this->db->delete('sessions');
		$message      = DELETE_RECORD_CONSTANT." On sessions id ".$id;
        $action       = "Delete";
        $record_id    = $id;
        $this->log($message, $record_id, $action);
		//======================Code End==============================
        $this->db->trans_complete(); # Completing transaction
        /*Optional*/
        if ($this->db->trans_status() === false) {
            # Something went wrong.
            $this->db->trans_rollback();
            return false;
        } else {
        //return $return_value;
        }
    }

    public function add($data) {
		$this->db->trans_start(); # Starting Transaction
        $this->db->trans_strict(false); # See Note 01. If you wish can remove as well
        //=======================Code Start===========================
        if (isset($data['id'])) {
            $this->db->where('id', $data['id']);
            $this->db->update('sessions', $data);
			$message      = UPDATE_RECORD_CONSTANT." On sessions id ".$data['id'];
			$action       = "Update";
			$record_id    = $data['id'];
			$this->log($message, $record_id, $action);
			//======================Code End==============================

			$this->db->trans_complete(); # Completing transaction
			/*Optional*/

			if ($this->db->trans_status() === false) {
				# Something went wrong.
				$this->db->trans_rollback();
				return false;

			} else {
				//return $return_value;
			}
        } else {
            $this->db->insert('sessions', $data);
			$insert_id = $this->db->insert_id();
			$message      = INSERT_RECORD_CONSTANT." On sessions id ".$insert_id;
			$action       = "Insert";
			$record_id    = $insert_id;
			$this->log($message, $record_id, $action);
			//echo $this->db->last_query();die;
			//======================Code End==============================

			$this->db->trans_complete(); # Completing transaction
			/*Optional*/

			if ($this->db->trans_status() === false) {
				# Something went wrong.
				$this->db->trans_rollback();
				return false;

			} else {
				//return $return_value;
			}
        }
    }

}
