index.php

<?php

    require_once("config/config.php");
	error_reporting( (DEBUG_MODE) ? E_ALL : 0 );

    // this is in the global space, maybe not a good idea
    // don't put this into a Utils class, if an app is using an autoloader to use the backend classes
    // this Utils might conflict with the backend's Utils.
    function amount_per_column($mixed, $amount_columns)
    {
        $amount = 0;

        switch(true)
        {
            case is_array($mixed): $amount = count($mixed); break;
            case is_object($mixed): $amount = count((array) $mixed); break;
            default: // should never happen
        }

        $amount_per_column = array();
        $equal_amount = floor($amount / $amount_columns);

        for($i=0; $i < $amount_columns; $i++)
            $amount_per_column[] = $equal_amount;

        $rest = $amount % $amount_columns;
        for($i=0; $i < $rest; $i++)
            $amount_per_column[$i]++;

        return $amount_per_column;
    }

    function dump($mixed, $is_html = false)
    {
        //if($is_html)
            //echo "<pre>" . print_r($mixed, true) . "</pre>";
        //else
            echo "<pre>" . htmlspecialchars(print_r($mixed, true)) . "</pre>";
    }

    function dumpx($mixed)
    {
        dump($mixed);
        exit();
    }

    function make_columns($data, $amount_columns, $attributes = array())
    {
        if(count($data) == 0)
            return;

        $list_type = isset($attributes['list_type']) ? $attributes['list_type'] : 'ul';
        $row_id = isset($attributes['row_id']) ? $attributes['row_id'] : '';
        $row_class = isset($attributes['row_class']) ? $attributes['row_class'] : '';
        $before_text = isset($attributes['before_text']) ? $attributes['before_text'] : '';
        $list_class = isset($attributes['list_class']) ? $attributes['list_class'] : '';

        // number used for the bootstrap span class
        $bootstrap_span_columns = floor(12/$amount_columns);

        // calculate the amount of elements per column
        $amounts = amount_per_column($data, $amount_columns);

        $columns = "";
        $list_item_number = 0;

        foreach($amounts as $column_number => $amount)
        {
            $column = <<<COLUMN
                    <div class="span$bootstrap_span_columns">
                        <$list_type class="$list_class">
                            %LISTITEMS%
                        </$list_type>
                    </div>
COLUMN;
            $list_items = "";
            for($i=0; $i<$amount; $i++)
            {
                $list_item_number++;
                $list_element = array_shift($data);

                if(! is_object($list_element))
                    $list_items .= '<li value="'. $list_item_number .'">'. $list_element .'</li>';
                else
                {
                    // href and label must be defined when generating the html later
                    $href = isset($list_element->href) ? $list_element->href : "#";
                    $label = isset($list_element->label) ? $list_element->label : "";

                    // generate a string with all the attributes
                    $link_attr = array();
                    foreach(get_object_vars($list_element) as $key => $content)
                    {
                        // the label is already processed
                        if($key != "label")
                        {
                            if(is_string($content))
                                $link_attr[] = $key.'="'. $content .'"';

                            if(is_array($content) && $key == "data")
                            {
                                foreach($content as $k => $d)
                                {
                                    $link_attr[] = 'data-'.$k.'="'. $d .'"';
                                }
                            }
                        }
                    }

                    $link_attr_str = join(' ', $link_attr);

                    $list_items .= <<<LI
                            <li value="$list_item_number">
                                <a $link_attr_str>
                                   $label
                                </a>
                            </li>
LI;
                }
            }

            $column = str_replace('%LISTITEMS%', $list_items, $column);
            $columns .= $column;
        }

        $html = <<<HTML
                    <div class="row $row_class" id="$row_id">
                        <div class="span12">
                            $before_text
                        </div>
                    </div>
                    <br>
                    <div class="row">
                        $columns
                    </div>
HTML;

        return $html;
    }

    /************************************************************************************************/
    // define the auto class loader
    function class_loader($classname)
    {
        $classfile = CLASSDIR . "$classname.class.php";

        if (file_exists($classfile))
        {
            require_once($classfile);
            return true;
        }

        // this is not so ideal, when the config cannot be loaded this fails
        // so just be sure the Config class is always included!
        $logger = KLogger::instance(LOGDIR, DEBUG_LEVEL);
        $logger->logEmerg("The class '$classname' cannot be loaded!");

        return false;
    }

    spl_autoload_register("class_loader");

    // whenever the backend classes are used, we most probably need the logger and the SAPI constant
    $logger = KLogger::instance(LOGDIR, DEBUG_LEVEL);
    define('SAPI', 'apache');
    /************************************************************************************************/

    // get the page that should be displayed, note that REDIRECT_URL
    // is set by apache after the rewrite rule was processed
    $requested_app = str_replace("/", "", $_SERVER['REDIRECT_URL']);

	// if no app is requested the introduction page will be shown
	if( empty($requested_app) )
		$requested_app = "intro";
	
	// we must whitelist the input
	$load_app = APPSDIR . "error-page";
    foreach(glob( APPSDIR . "*") as $app_dir)
    {
		if ( "$requested_app" === basename($app_dir) )
			$load_app = $app_dir;
    }

    include("Page.php");
    $page = new Page(basename($load_app));

    chdir($load_app);
	include("app.php");
    chdir(ROOTDIR);

	$output = file_get_contents("template.html");
	$output = str_replace("%CONTENT%", $page->content(), $output);
	
	/*************************************************************/
	
	$prefetch_tags = "";
	foreach($page->prefetchAssets() as $asset)
	{
		if(! empty($asset))
			$prefetch_tags .= '<link rel="prefetch" href="'. $asset .'" >';
	}
	
	$output = str_replace("%PREFETCHASSETS%", $prefetch_tags, $output);
	
	/*************************************************************/
	
	$script_tags = "";
	foreach($page->scripts() as $script)
	{
		if(! empty($script))
			$script_tags .= '<script src="'. $script .'"></script>';	
	}
	
	$output = str_replace("%SCRIPTS%", $script_tags, $output);
	
	/*************************************************************/

    $global_script_tags = "";
    foreach($page->requireScripts() as $script)
    {
        if(! empty($script))
            $global_script_tags .= '<script src="c/js/'. $script .'"></script>';
    }

    $output = str_replace("%REQUIRE_GLOBAL_SCRIPTS%", $global_script_tags, $output);

    /*************************************************************/

	$stylesheet_tags = "";	
	foreach($page->stylesheets() as $stylesheet)
	{
		if(! empty($stylesheet))
			$stylesheet_tags .= '<link type="text/css" rel="stylesheet" href="'. $stylesheet .'">';
	}
	
	$output = str_replace("%STYLESHEETS%", $stylesheet_tags, $output);
	
	/*************************************************************/

	$inline_style_tag = "<style>". join("", $page->inlineStyles()) ."</style>";
	$output = str_replace("%INLINESTYLES%", $inline_style_tag, $output);
	
	/*************************************************************/
	
	// populate the menu
	include( APPSDIR . "menu.php");
	
	$menu_tags = "";
	foreach($menu as $key => $label)
	{
		$class = "";
		if( $key == $page->activePage() )
			$class = "active";
		
		$menu_tags .= '<li class="'. $class .'"><a href="'. $key .'">'. $label .'</a></li>';
	}
	
	$output = str_replace("%MENU%", $menu_tags, $output);
    $output = str_replace("%SITEURL%", "http://".SITE_URL, $output);
	
    echo $output;