function.lepton_autoloader.php

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<?php
 
function lepton_autoloader(string $aClassName ): bool
{
    $lepton_path = dirname(__DIR__, 2);
 
    $terms = explode("_", $aClassName);
 
    if ($terms[0] === 'LEPTON')
    {
        // We are looking inside the LEPTON-CMS framework directory:
        $path = $lepton_path."/framework/classes/".strtolower($aClassName).".php";
        if (file_exists($path))
        {
            require_once $path;
            return true;
        }
    } 
    else 
    {
        // Any module or template specific CLASS
        $aMainFolders = ["modules", "templates"];
        
        //  [1] Any namespaces given?
        $aNTest = explode("\\", $aClassName);
        if (count($aNTest) > 1)
        {
            $sPartOne = array_shift($aNTest);
            $sSubPart = implode("/", $aNTest);
            foreach ($aMainFolders as $sMainDir)
            {
                $path = $lepton_path."/".$sMainDir."/".$sPartOne."/classes/".$sSubPart.".php";
 
                if (file_exists($path))
                {
                    require $path;
                    return true;
                } 
                else 
                {
                    $path = $lepton_path."/".$sMainDir."/".$sPartOne."/".$sSubPart.".php";
                    if (file_exists($path))
                    {
                        require $path;
                        return true;
                    }
                }
            }
        }
        
        //  [2] Non given, nor found
        $aMainFolders = ["modules", "templates"];
 
        foreach ($aMainFolders as $sMainDir)
        {
            $path = $lepton_path."/".$sMainDir."/".$aClassName."/classes/".$aClassName.".php";
 
            if (file_exists($path))
            {
                require_once $path;
                return true;
            } 
            else 
            {
                $n = count($terms);
                $look_up = $terms[0];
 
                for ($i = 0; $i < $n; $i++)
                {
                    $temp_dir = $look_up . ($i > 0 ? "_" . $terms[$i] : "");
 
                    $path = $lepton_path."/".$sMainDir."/".$temp_dir."/classes/".$aClassName.".php";
                    if (file_exists($path))
                    {
                        require_once $path ;
                        return true;
                    }
                    elseif ($i > 0)
                    {
                        $temp_dir = $look_up."-".$terms[$i];
                        $path = $lepton_path."/".$sMainDir."/".$temp_dir."/classes/".$aClassName.".php";
                        if (file_exists($path))
                        {
                            require_once $path;
                            return true;
                        }
                    }
 
                    $look_up = $temp_dir;
                }
            }
        }
 
        //  [3] account
        $path = $lepton_path."/".$aClassName."/classes/".$aClassName.".php";
        if (file_exists($path))
        {
            require_once $path;
            return true;
        } else {
            $look_up = $terms[0];
 
            $path = $lepton_path."/".$look_up."/classes/".$aClassName.".php";
            if (file_exists($path))
            {
                require_once $path;
                return true;
            }
 
        }
    }
    return false;
}