#39 - PHP Class to construct pages

Data: 2018-12-15 12:00 - PHP
Yet another class to help construct pages in PHP
<?php

class Page {
	private static $page;
    private static $constructsList = array();
	private static $navigationList = array();

	private static $title;
	private static $description;
	private static $header;

	public static function getPage() {
		return self::$page;
	}

	public static function setTitle($title) {
		self::$title = $title;
	}

	public static function setDescription($description) {
		self::$description = $description;
	}

	public static function setHeader($header) {
		self::$header = $header;
	}

	public static function getFullTitle() {
		$pageTitle = Settings::get('Website-Title');
		return self::$title == null ? $pageTitle : ($pageTitle . ' - ' . self::$title);
	}

	public static function getDescription() {
		return isset(self::$description) ? self::$description : Settings::get('Website-Description');
	}

	public static function getHeader() {
		return isset(self::$header) ? self::$header : Settings::get('Website-Header');
	}

	public static function construct() {
		$uri = $_SERVER['REQUEST_URI'];
		if (($getStart = strpos($uri, '?')) !== false)
			$uri = substr($uri, 0, $getStart);
		$uri = trim($uri, '/');

		if ((self::$page = $uri) == '')
			self::$page = 'index';

		if (file_exists('pages/' . self::$page . '.php'))
			include ('pages/' . self::$page . '.php');
		else if (array_key_exists('REDIRECT_STATUS', $_SERVER) && $_SERVER['REDIRECT_STATUS'] == 403)
			Page::setErrorPage("403", "Forbidden");
		else
			Page::setErrorPage("404", "Not Found");
		echo '<!DOCTYPE html>', "\n";
		echo'<html lang="en"><head>';
		self::dumpHead();
		echo '</head><body>';
		self::dumpBody();
		self::constructSection('scripts');
		echo '</body>';
		echo '</html>';
	}


	private static function dumpHead() {
		echo '<title>', self::getFullTitle(), '</title>';
		echo '<meta charset="UTF-8">';
		self::constructSection('head');
		self::constructSection('metas');
		self::constructSection('styles');
	}

	private static function dumpBody() {
		self::constructSection('body');
	}

	public static function addConstruct($section, $func) {
        if(!array_key_exists($section, self::$constructsList))
            self::$constructsList[$section] = array();
        self::$constructsList[$section][] = $func;
    }

    public static function constructSection($section) {
        if(!array_key_exists($section, self::$constructsList))
            return;
        foreach(self::$constructsList[$section] as $func)
            $func();
    }

	public static function addStylesheet($link, $attrs = '') {
        self::addConstruct('styles', function() use ($link, $attrs) {
        	echo '<link rel="stylesheet" href="' . $link . '" type="text/css" ' . $attrs . '/>';
        });
    }

    public static function addScript($link) {
        self::addConstruct('scripts', function() use ($link) {
        	echo '<script src="' . $link . '"></script>';
        });
    }

	public static function setErrorPage($error, $errorDesc) {
		header($_SERVER['SERVER_PROTOCOL'] . " $error $errorDesc");
		if (file_exists("pages/errors/$error.php"))
			include ("pages/errors/$error.php");
		else {
			Page::setTitle("$error $errorDesc");
		}
	}

	public static function addNavigation($section, $text, $link) {
        if(!array_key_exists($section, self::$navigationList))
            self::$navigationList[$section] = array();
        self::$navigationList[$section][] = array($text, $link);
	}

	public static function getNavigation($section) {
		if(!array_key_exists($section, self::$navigationList))
			return array();
		return self::$navigationList[$section];
	}

}
?>
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