clearnpath.php

См. документацию.

<?php
 
interface ILearnPath
{
    public function __construct();

    public function SetPath();

    public function SetPathFromArray($arPath);

    public function ImportUrlencoded($str);

    public function ExportUrlencoded();

    public function GetPathAsArray();

    public function GetTop();

    public function GetBottom();

    public function PopBottom();

    public function ShiftTop();
 

    public function Count();
 

    public function GetPathAsHumanReadableString($delimiter = ' / ', $pattern = '#NAME#');
}
 
class CLearnPath implements ILearnPath
{
    const DELIMITER = '.';
    protected $arPath = array();
 
    public function __construct ()
    {
        $this->_SetPath (func_get_args());
    }
 
    public function SetPath ()
    {
        $this->_SetPath (func_get_args());
    }
 
    protected function _SetPath ($args)
    {
        // If only one arguments and it's an array => set path from array.
        if ( (count($args) == 1) && (is_array($args[0])) )
        {
            $this->_SetPath ($args[0]);
            return;
        }
 
        $this->arPath = array();
 
        foreach ($args as $key => $lessonId)
        {
            if (
                ( ! is_numeric($lessonId) )
                || ( ! is_int($lessonId + 0) )
            )
            {
                $this->arPath = array();
                return;
            }
 
            $this->arPath[] = (int) ($lessonId);
        }
    }
 
    public function SetPathFromArray($arPath)
    {
        $this->_SetPath ($arPath);
    }
 
    // returns true if $str is path with two or more elements
    public static function IsUrlencodedPath ($str)
    {
        $tmp = urldecode($str);
 
        if (mb_strpos($tmp, self::DELIMITER) !== false)
            return (true);
        else
            return (false);
    }
 
 
    public function ImportUrlencoded($str)
    {
        $this->arPath = array();
 
        $tmp = urldecode($str);
        if ($tmp == '')
        {
            return;
        }
 
        $arPath = explode(self::DELIMITER, $tmp);
        if ( ! is_array($arPath) )
        {
            return;
        }
 
        $this->_SetPath($arPath);
    }
 
    public function GetPathAsArray()
    {
        return ($this->arPath);
    }
 
    public function ExportUrlencoded()
    {
        return (urlencode(implode(self::DELIMITER, $this->arPath)));
    }
 
    public function GetTop()
    {
        if ( ! isset($this->arPath[0]) )
            return (false);
 
        return ($this->arPath[0]);
    }
 
    public function GetBottom()
    {
        $count = count ($this->arPath);
        if ( ! isset($this->arPath[$count - 1]) )
            return (false);
 
        return ($this->arPath[$count - 1]);
    }
 
 
    public function PopBottom()
    {
        $popped = array_pop ($this->arPath);
 
        // If there is no elements was in path
        if ($popped === NULL)
            return (false);
 
        return ($popped);
    }
 
 
    public function ShiftTop()
    {
        $shifted = array_shift ($this->arPath);
 
        // If there is no elements was in path
        if ($shifted === NULL)
            return (false);
 
        return ($shifted);
    }
 
 
    public function GetPathAsHumanReadableString($delimiter = ' / ', $pattern = '#NAME#')
    {
        $arHumanReadablePath = array();
        foreach ($this->arPath as $lessonId)
        {
            $rc = CLearnLesson::GetByID($lessonId);
            $rc = $rc->Fetch();
            $id   = '???';
            $name = '???';
            if (isset($rc['LESSON_ID']))
                $id = $rc['LESSON_ID'];
 
            if (isset($rc['NAME']))
                $name = htmlspecialcharsbx($rc['NAME']);
 
            $txt = $pattern;
            $txt = str_replace('#LESSON_ID#', $id, $txt);
            $txt = str_replace('#NAME#', $name, $txt);
 
            $arHumanReadablePath[] = $txt;
        }
 
        return (implode($delimiter, $arHumanReadablePath));
    }
 
 
    public function Count()
    {
        return (count($this->arPath));
    }
}