ken-muturi/util.php

## util.php
<?php
class Util
{
    public static $realm = 'PHP ODK Aggregate';
    public static $users = [
        'admin' => 'mypass',
        'guest' => 'guest'
    ];

    // function to parse the http auth header
    public static function http_digest_parse( $txt )
    {
        // protect against missing data
        $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
        $data = array();

        preg_match_all('@(\w+)=(?:(?:\'([^\']+)\'|"([^"]+)")|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);

        foreach ($matches as $m)
        {
        $data[$m[1]] = $m[2] ? $m[2] : ($m[3] ? $m[3] : $m[4]);
        unset($needed_parts[$m[1]]);
        }

        return $needed_parts ? false : $data;
    }

    public static function check_user_pass()
    {
        $data = self::http_digest_parse( $_SERVER['PHP_AUTH_DIGEST'] );
        $name = $data['username'];
        file_put_contents(realpath('uploads/uploaded_files/').'/data.json', json_encode($data) );

        $A1 = md5($data['username'] . ':' . self::$realm . ':' . self::$users[$data['username']]);
        $A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
        $valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

        if ($data['response'] != $valid_response)
            return false;

        return true;
    }

    public static function formList()
    {
        $forms = glob('uploads/odk/*.xml');
        $_forms = [];
        $_forms [] = '<xforms xmlns="http://openrosa.org/xforms/xformsList">';
        foreach ($forms as $form)
        {
            $details =  pathinfo($form);
            $url =  self::site_url($form);
            $_forms [] = "<xform>";
                $_forms [] = "<formID>{$details['filename']}</formID>";
                $_forms [] = "<name>{$details['filename']}</name>";
                $_forms [] = "<version>1.1</version>";
                $_forms [] = "<hash>md5:". md5_file( $form ) ."</hash>";
                $_forms [] = "<downloadUrl>{$url}</downloadUrl>";
            $_forms [] = "</xform>";
        }
        $_forms [] = '</xforms>';
       return $_forms;
    }

    /**
     * Wrap output of the print_r() function in <PRE> html tags to enable easier debug selects either the last posted value or the db value (selected value)
     *
     * @author          imss team
     * */
    public static function printr($var)
    {
        if ($var === FALSE)
        {
            var_dump($var);
        }
        else
        {
            echo "<pre>" . print_r($var, 1) . "</pre>";
        }
    }

    public static function printResponse($msg = '', $httpcode="200 OK")
    {
        header('HTTP/1.1 '.$httpcode);
        header('Content-Type: text/xml');
        echo "<OpenRosaResponse xmlns=\"http://openrosa.org/http/response items=\"1\">";
        echo "<message>$msg</message>";
        echo "</OpenRosaResponse>";
        die();
    }

    public static function printError($msg = '', $httpcode="400 Not found")
    {
        header('HTTP/1.1 '. $httpcode);
        header('Content-Type: text/html');
        echo "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd\">
            <html>
            <head>
            <title>Error</title>
            </head>
            <body><h1>$httpcode</h1>
            <p>$msg</p></body>
            </html>
            ";

        die();
    }

    /**
     * Create a teaser from string.
     *
     * This function will eventually be deleted, please use word_limiter()
     *
     * @param           string      $string     The
     * @param           int         $length     The character length of the teaser
     * @return          string
     * @author          imss team
     * */
    public static function teaser($string, $length)
    {
        return substr($string, 0, $length) . (($length < strlen($string)) ? " .." : null);
    }

    public static function selected($field, $value, $selected_value = null)
    {
        $selected =  (isset($_POST[$field])) ? ($_POST[$field] == $value) : null;
        if ($selected) return "selected='selected'";

        if ($selected_value)
        {
            if( is_object($selected_value) )
            {
                if ($value == $selected_value->$field)
                {
                    return "selected='selected'";
                }
            }
            else if ($value == $selected_value)
            {
                return "selected='selected'";
            }
        }
    }

    public static function checked($field, $value, $selected_value = null)
    {
        $selected =  (isset($_POST[$field])) ? ($_POST[$field] == $value) : null;
        if ($selected) return "checked='checked'";

        if ($selected_value)
        {
            if( is_object($selected_value) )
            {
                if ($value == $selected_value->$field)
                {
                    return "checked='checked'";
                }
            }
            elseif ($value == $selected_value)
            {
                return "checked='checked'";
            }
        }
    }

    public static function formval($prop, $default = '')
    {
        if (isset($_POST[$prop]))
        {
            return  $_POST[$prop];
        }

        if ($default)
        {
            if( is_object($default) )
            {
                return $default->$prop;
            }
            return $default;
        }
    }

    public static function check_checkbox($name, $dbval = null)
    {
        if ( $dbval ) return "checked='checked'";

        $variable = null;
        if (preg_match('/\]/i', $name))
        {
            preg_match_all('/(.+)\[(.+)\]/i', $name, $matches);

            $name = $matches[1][0];
            $idx = $matches[2][0];
            if ( isset($_POST[$name][$idx]) )
            {
                $variable = $_POST[$name][$idx];
            }
        }

        if (isset( $_POST[$name] ) )
        {
            $variable = $_POST[$name];
        }

        return ( $variable ) ? "checked='checked'" : null;
    }

    function site_url($var)
    {
        return BASE_URL.$var;
    }
}
	<?php
	class Util
	{
	public static $realm = 'PHP ODK Aggregate';
	public static $users = [
	'admin' => 'mypass',
	'guest' => 'guest'
	];

	// function to parse the http auth header
	public static function http_digest_parse( $txt )
	{
	// protect against missing data
	$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
	$data = array();

	preg_match_all('@(\w+)=(?:(?:\'([^\']+)\'\|"([^"]+)")\|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);

	foreach ($matches as $m)
	{
	$data[$m[1]] = $m[2] ? $m[2] : ($m[3] ? $m[3] : $m[4]);
	unset($needed_parts[$m[1]]);
	}

	return $needed_parts ? false : $data;
	}

	public static function check_user_pass()
	{
	$data = self::http_digest_parse( $_SERVER['PHP_AUTH_DIGEST'] );
	$name = $data['username'];
	file_put_contents(realpath('uploads/uploaded_files/').'/data.json', json_encode($data) );

	$A1 = md5($data['username'] . ':' . self::$realm . ':' . self::$users[$data['username']]);
	$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
	$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);

	if ($data['response'] != $valid_response)
	return false;

	return true;
	}

	public static function formList()
	{
	$forms = glob('uploads/odk/*.xml');
	$_forms = [];
	$_forms [] = '<xforms xmlns="http://openrosa.org/xforms/xformsList">';
	foreach ($forms as $form)
	{
	$details = pathinfo($form);
	$url = self::site_url($form);
	$_forms [] = "<xform>";
	$_forms [] = "<formID>{$details['filename']}</formID>";
	$_forms [] = "<name>{$details['filename']}</name>";
	$_forms [] = "<version>1.1</version>";
	$_forms [] = "<hash>md5:". md5_file( $form ) ."</hash>";
	$_forms [] = "<downloadUrl>{$url}</downloadUrl>";
	$_forms [] = "</xform>";
	}
	$_forms [] = '</xforms>';
	return $_forms;
	}

	/**
	* Wrap output of the print_r() function in <PRE> html tags to enable easier debug selects either the last posted value or the db value (selected value)
	*
	* @author imss team
	* */
	public static function printr($var)
	{
	if ($var === FALSE)
	{
	var_dump($var);
	}
	else
	{
	echo "<pre>" . print_r($var, 1) . "</pre>";
	}
	}

	public static function printResponse($msg = '', $httpcode="200 OK")
	{
	header('HTTP/1.1 '.$httpcode);
	header('Content-Type: text/xml');
	echo "<OpenRosaResponse xmlns=\"http://openrosa.org/http/response items=\"1\">";
	echo "<message>$msg</message>";
	echo "</OpenRosaResponse>";
	die();
	}

	public static function printError($msg = '', $httpcode="400 Not found")
	{
	header('HTTP/1.1 '. $httpcode);
	header('Content-Type: text/html');
	echo "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\"\"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd\">
	<html>
	<head>
	<title>Error</title>
	</head>
	<body><h1>$httpcode</h1>
	<p>$msg</p></body>
	</html>
	";

	die();
	}

	/**
	* Create a teaser from string.
	*
	* This function will eventually be deleted, please use word_limiter()
	*
	* @param string $string The
	* @param int $length The character length of the teaser
	* @return string
	* @author imss team
	* */
	public static function teaser($string, $length)
	{
	return substr($string, 0, $length) . (($length < strlen($string)) ? " .." : null);
	}

	public static function selected($field, $value, $selected_value = null)
	{
	$selected = (isset($_POST[$field])) ? ($_POST[$field] == $value) : null;
	if ($selected) return "selected='selected'";

	if ($selected_value)
	{
	if( is_object($selected_value) )
	{
	if ($value == $selected_value->$field)
	{
	return "selected='selected'";
	}
	}
	else if ($value == $selected_value)
	{
	return "selected='selected'";
	}
	}
	}

	public static function checked($field, $value, $selected_value = null)
	{
	$selected = (isset($_POST[$field])) ? ($_POST[$field] == $value) : null;
	if ($selected) return "checked='checked'";

	if ($selected_value)
	{
	if( is_object($selected_value) )
	{
	if ($value == $selected_value->$field)
	{
	return "checked='checked'";
	}
	}
	elseif ($value == $selected_value)
	{
	return "checked='checked'";
	}
	}
	}

	public static function formval($prop, $default = '')
	{
	if (isset($_POST[$prop]))
	{
	return $_POST[$prop];
	}

	if ($default)
	{
	if( is_object($default) )
	{
	return $default->$prop;
	}
	return $default;
	}
	}

	public static function check_checkbox($name, $dbval = null)
	{
	if ( $dbval ) return "checked='checked'";

	$variable = null;
	if (preg_match('/\]/i', $name))
	{
	preg_match_all('/(.+)\[(.+)\]/i', $name, $matches);

	$name = $matches[1][0];
	$idx = $matches[2][0];
	if ( isset($_POST[$name][$idx]) )
	{
	$variable = $_POST[$name][$idx];
	}
	}

	if (isset( $_POST[$name] ) )
	{
	$variable = $_POST[$name];
	}

	return ( $variable ) ? "checked='checked'" : null;
	}

	function site_url($var)
	{
	return BASE_URL.$var;
	}
	}