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<?php
include_once('crud.php');
/*
-----------------
Functions 
-----------------
1. get_system_configs() 
2. get_random_string($valid_chars, $length)
3. sanitize($string) 
4. check_integer($which)
5. get_current_page()
6. doPages($page_size, $thepage, $query_string, $total=0, $keyword)
7. slugify($text)
8. registerDevice($user_id,$token)
9. isDeviceRegistered($user_id)
10. getAllTokens()
11. getTokenByEmail($email)
12. getAllDevices()

*/
class functions
{
    protected $db;
    function __construct()
    {
        $this->db = new Database();
        $this->db->connect();
        date_default_timezone_set('Asia/Kolkata');
    }

    public $currency_info = array(
        array('code' => 'AED', 'name' => 'United Arab Emirates Dirham'),
        array('code' => 'ANG', 'name' => 'NL Antillian Guilder'),
        array('code' => 'ARS', 'name' => 'Argentine Peso'),
        array('code' => 'AUD', 'name' => 'Australian Dollar'),
        array('code' => 'BRL', 'name' => 'Brazilian Real'),
        array('code' => 'BSD', 'name' => 'Bahamian Dollar'),
        array('code' => 'CAD', 'name' => 'Canadian Dollar'),
        array('code' => 'CHF', 'name' => 'Swiss Franc'),
        array('code' => 'CLP', 'name' => 'Chilean Peso'),
        array('code' => 'CNY', 'name' => 'Chinese Yuan Renminbi'),
        array('code' => 'COP', 'name' => 'Colombian Peso'),
        array('code' => 'CZK', 'name' => 'Czech Koruna'),
        array('code' => 'DKK', 'name' => 'Danish Krone'),
        array('code' => 'EUR', 'name' => 'Euro'),
        array('code' => 'FJD', 'name' => 'Fiji Dollar'),
        array('code' => 'GBP', 'name' => 'British Pound'),
        array('code' => 'GHS', 'name' => 'Ghanaian New Cedi'),
        array('code' => 'GTQ', 'name' => 'Guatemalan Quetzal'),
        array('code' => 'HKD', 'name' => 'Hong Kong Dollar'),
        array('code' => 'HNL', 'name' => 'Honduran Lempira'),
        array('code' => 'HRK', 'name' => 'Croatian Kuna'),
        array('code' => 'HUF', 'name' => 'Hungarian Forint'),
        array('code' => 'IDR', 'name' => 'Indonesian Rupiah'),
        array('code' => 'ILS', 'name' => 'Israeli New Shekel'),
        array('code' => 'INR', 'name' => 'Indian Rupee'),
        array('code' => 'ISK', 'name' => 'Iceland Krona'),
        array('code' => 'JMD', 'name' => 'Jamaican Dollar'),
        array('code' => 'JPY', 'name' => 'Japanese Yen'),
        array('code' => 'KRW', 'name' => 'South-Korean Won'),
        array('code' => 'LKR', 'name' => 'Sri Lanka Rupee'),
        array('code' => 'MAD', 'name' => 'Moroccan Dirham'),
        array('code' => 'MMK', 'name' => 'Myanmar Kyat'),
        array('code' => 'MXN', 'name' => 'Mexican Peso'),
        array('code' => 'MYR', 'name' => 'Malaysian Ringgit'),
        array('code' => 'NOK', 'name' => 'Norwegian Kroner'),
        array('code' => 'NZD', 'name' => 'New Zealand Dollar'),
        array('code' => 'PAB', 'name' => 'Panamanian Balboa'),
        array('code' => 'PEN', 'name' => 'Peruvian Nuevo Sol'),
        array('code' => 'PHP', 'name' => 'Philippine Peso'),
        array('code' => 'PKR', 'name' => 'Pakistan Rupee'),
        array('code' => 'PLN', 'name' => 'Polish Zloty'),
        array('code' => 'RON', 'name' => 'Romanian New Lei'),
        array('code' => 'RSD', 'name' => 'Serbian Dinar'),
        array('code' => 'RUB', 'name' => 'Russian Rouble'),
        array('code' => 'SEK', 'name' => 'Swedish Krona'),
        array('code' => 'SGD', 'name' => 'Singapore Dollar'),
        array('code' => 'THB', 'name' => 'Thai Baht'),
        array('code' => 'TND', 'name' => 'Tunisian Dinar'),
        array('code' => 'TRY', 'name' => 'Turkish Lira'),
        array('code' => 'TTD', 'name' => 'Trinidad/Tobago Dollar'),
        array('code' => 'TWD', 'name' => 'Taiwan Dollar'),
        array('code' => 'USD', 'name' => 'US Dollar'),
        array('code' => 'VEF', 'name' => 'Venezuelan Bolivar Fuerte'),
        array('code' => 'VND', 'name' => 'Vietnamese Dong'),
        array('code' => 'XAF', 'name' => 'CFA Franc BEAC'),
        array('code' => 'XCD', 'name' => 'East Caribbean Dollar'),
        array('code' => 'XPF', 'name' => 'CFP Franc'),
        array('code' => 'ZAR', 'name' => 'South African Rand')
    );

    function get_system_configs()
    {
        $sql = "select * from `settings` where `variable`='system_timezone'";
        $this->db->sql($sql);
        $result = $this->db->getResult();
        $this->db->disconnect();
        if (!empty($result)) {
            return json_decode($result[0]['value'], 1);
        } else {
            return false;
        }
    }

    function get_random_string($valid_chars, $length)
    {

        // start with an empty random string
        $random_string = "";

        // count the number of chars in the valid chars string so we know how many choices we have
        $num_valid_chars = strlen($valid_chars);

        // repeat the steps until we've created a string of the right length
        for ($i = 0; $i < $length; $i++) {
            // pick a random number from 1 up to the number of valid chars
            $random_pick = mt_rand(1, $num_valid_chars);

            // take the random character out of the string of valid chars
            // subtract 1 from $random_pick because strings are indexed starting at 0, and we started picking at 1
            $random_char = $valid_chars[$random_pick - 1];

            // add the randomly-chosen char onto the end of our string so far
            $random_string .= $random_char;
        }

        // return our finished random string
        return $random_string;
    } // end of get_random_string()

    function sanitize($string)
    {
        // check string value
        $string = trim(strip_tags(stripslashes($string)));
        return $string;
    } // end of sanitize()

    function check_integer($which)
    {
        if (isset($_GET[$which])) {
            if (intval($_GET[$which]) > 0) {
                return intval($_GET[$which]);
            } else {
                return false;
            }
        }
        return false;
    } //end of check_integer()

    function get_current_page()
    {
        if (($var = $this->check_integer('page'))) {
            //return value of 'page', in support to above method
            return $var;
        } else {
            //return 1, if it wasnt set before, page=1
            return 1;
        }
    } //end of method get_current_page()

    function doPages($page_size, $thepage, $query_string, $total = 0, $keyword)
    {
        //per page count
        $index_limit = 10;

        //set the query string to blank, then later attach it with $query_string
        $query = '';

        if (strlen($query_string) > 0) {
            $query = "&amp;" . $query_string;
        }

        //get the current page number example: 3, 4 etc: see above method description
        $current = $this->get_current_page();

        $total_pages = ceil($total / $page_size);
        $start = max($current - intval($index_limit / 2), 1);
        $end = $start + $index_limit - 1;

        echo '<div id="box-footer clearfix">';
        echo '<ul class="pagination pagination-sm no-margin pull-right">';

        if ($current == 1) {
            echo '';
        } else {
            $i = $current - 1;
            echo '<li><a href="' . $thepage . '?page=' . $i . $query . '&keyword=' . $keyword . '" rel="nofollow" title="go to page ' . $i . '">&laquo;</a></li>';
            //echo '<p>...</p>&nbsp;';
        }
        //<button>'.$i.'</button>
        if ($start > 1) {
            $i = 1;
            echo '<li><a href="' . $thepage . '?page=' . $i . $query . '&keyword=' . $keyword . '" title="go to page ' . $i . '">' . $i . '</a></li>';
        }

        for ($i = $start; $i <= $end && $i <= $total_pages; $i++) {
            if ($i == $current) {
                echo '<li class="active"><a>' . $i . '</a></li>';
            } else {
                echo '<li><a href="' . $thepage . '?page=' . $i . $query . '&keyword=' . $keyword . '" title="go to page ' . $i . '">' . $i . '</a></li>';
            }
        }

        if ($total_pages > $end) {
            $i = $total_pages;
            echo '<li><a href="' . $thepage . '?page=' . $i . $query . '&keyword=' . $keyword . '" title="go to page ' . $i . '">' . $i . '</a></li>';
        }

        if ($current < $total_pages) {
            $i = $current + 1;
            //echo '<p>...</p>&nbsp;';
            echo '<li><a href="' . $thepage . '?page=' . $i . $query . '&keyword=' . $keyword . '" rel="nofollow" title="go to page ' . $i . '">&raquo;</a></li>';
        } else {
            echo '';
        }

        echo '</ul>';

        //if nothing passed to method or zero, then dont print result, else print the total count below:       
        if ($total != 0) {
            //prints the total result count just below the paging
            echo '<p><br>Total :  ' . $total . '</p></div>';
        } else {
            echo '</div>';
        };
    } //end of method doPages()

    // public function slugify($slug_text)
    // {
    //     return mb_strtolower(preg_replace('/[ ,.@#$%^&*()_\/=]+/', '-', trim($slug_text)), 'UTF-8');
    // }
    
    public function slugify($text, $table = 'products', $field = 'slug', $key = NULL, $value = NULL)
    {
        $slug2 = strtolower($text);

        // replace non letter or digits by -
        $text = preg_replace('~[^\pL\d]+~u', '-', $text);

        // transliterate
        //   $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
        $text = iconv('utf-8', 'UTF-8//TRANSLIT', $text);

        // remove unwanted characters
        $text = preg_replace('~[^-\w]+~', '', $text);

        // trim
        $text = trim($text, '-');

        // remove duplicate -
        $text = preg_replace('~-+~', '-', $text);

        // lowercase
        $slug = strtolower($text);

        if (empty($slug)) {
            // return 'n-a';
            $slug = mb_strtolower(preg_replace('/[ ,.@#$%^&*()_\/=]+/', '-', trim($slug2)), 'UTF-8');
        }
        $sql = "SELECT COUNT(id) AS total_slugs FROM $table WHERE $field  LIKE '$slug%'";
        $this->db->sql($sql);
        $total = $this->db->getResult();
        return ($total[0]['total_slugs'] > 0) ? ($slug . '-' . $total[0]['total_slugs']) : $slug;
    }
    //storing token in database 
    public function registerDevice($fcm_id, $user_id = 0)
    {
        $sql = "SELECT id,fcm_id FROM users WHERE `fcm_id` = '$fcm_id' ";
        $this->db->sql($sql);
        $res1 = $this->db->getResult();

        $sql = "SELECT id,fcm_id FROM users WHERE `id` = '$user_id' ";
        $this->db->sql($sql);
        $res = $this->db->getResult();
        if (!empty($res) || !empty($res1)) {
            if ($res[0]['fcm_id'] != $fcm_id) {
                if (!empty($res1)) {
                    $user_id =  $res1[0]['id'];
                }
                $sql = "update users set `fcm_id` ='$fcm_id' where id = '" . $user_id . "'";
                if ($this->db->sql($sql)) {
                    return 0;
                } else {
                    return 1;
                }
            } else {
                return 2;
            }
        } else {
            if (!$this->isDeviceRegistered($fcm_id)) {
                $sql = "INSERT INTO devices (user_id,fcm_id) VALUES ('$user_id','$fcm_id')";
                $this->db->sql($sql);
                $res = $this->db->getResult();
                if (!empty($res))
                    return 1; //return 1 means failure
                return 0; //return 0 means success
            } else {
                return 2; //returning 2 means user_id already exist
            }
        }
    }
    //the method will check if email already exist 
    private function isDeviceRegistered($id)
    {
        $sql = "SELECT id FROM devices WHERE `fcm_id` = '$id' ";
        $this->db->sql($sql);
        $res = $this->db->getResult();
        $num_rows = $this->db->numRows($res);
        return ($num_rows > 0) ? true : false;
    }
    //getting all tokens to send push to all devices
    public function getAllTokens($table = 'users')
    {
        $sql = "SELECT `fcm_id` FROM `$table`";
        $this->db->sql($sql);
        /* $result = $stmt->get_result();
        $tokens = array(); 
        while($token = $result->fetch_assoc()){
            array_push($tokens, $token['token']);
        } */
        $res = $this->db->getResult();
        $tokens = array();
        foreach ($res as $row) {
            array_push($tokens, $row['fcm_id']);
        }
        return $tokens;
    }
    //getting a specified token to send push to selected device
    public function getTokenByEmail($email)
    {
        $sql = "SELECT fcm_id FROM users WHERE email = '" . $email . "'";
        $this->db->sql($sql);
        $res = $this->db->getResult();
        $tokens = array();
        foreach ($res as $row) {
            array_push($tokens, $row['token']);
        }
        return $tokens;
    }
    //getting all the registered devices from database 
    public function getAllDevices()
    {
        $sql = "SELECT fcm_id FROM users";
        $this->db->sql($sql);
        $res = $this->db->getResult();
        return $res;
    }
    public function getTokenByUid($uid)
    {
        $sql = "SELECT fcm_id FROM users WHERE id = '" . $uid . "'";
        $this->db->sql($sql);
        $res = $this->db->getResult();
        $token = array();
        foreach ($res as $row) {
            array_push($token, $row['fcm_id']);
        }
        return $token;
    }
}

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