<?php
class NavigationDef {
	/* Properties */
	private $topFolder = "Navi-Projekt";
	private $structure;

	/* Constructor
	Parameter: array with the structure of the navigation */
	public function __construct($navArr) {
		$this->structure = $navArr;
	}
	
	/* Method:
	build the HTML-code for the navigation
	Parameter: First and second level of the navigation */
	public function writeNav($firstLvl,$secondLvl) {
		$code = "";
		$code .= "<nav>\n";
		// Home Link
		$code .= "<div id=\"home_link\">\n";
		$code .= "<a href=\"".$this->pathHelperHome()."index.php\">Home</a>";
		$code .= "</div>\n";
		// Main part of navigation: 
		$code .= "<ul class=\"menu\">\n";
		// The 1st Level of the navigation
		$counter1 = 1;
		foreach ($this->structure as $key => $out1) {
			$code .= "<!-- ******* Menu item ".$counter1." ******* -->\n";
			$code .= "<li";
			if ($counter1 == $firstLvl) {
				$code .= " class=\"current\"";
			}
			$code .= ">\n";
			// Is it a menu item with a dropdown or just one single link?
			if (count($out1) == 1) {
				// It's a single link WITHOUT a dropdown
				$path = $this->pathHelper2ndLvl($key).$out1[0]['fileName'];
				$code .= "<a class=\"nav-link\" href=\"".$path."\">".$key."</a>\n";
			}
			else {
				// It's menu item WITH a dropdown
				$code .= "<a class=\"nav-link dropdown-btn\"";
				$code .= " id=\"dropdownBtn".$counter1."\" data-dropdown=\"dropdown".$counter1."\"";
				$code .= " aria-haspopup=\"true\" aria-expanded=\"false\" href=\"#\">";
				$code .= $key;
				$code .= " ▾</a>\n";
				// The 2nd Level of the navigation
				$code .= "<!-- Start dropdwn -->\n";
				$code .= "<ul class=\"dropdown\" aria-labelledby=\"dropdownBtn".$counter1."\" id=\"dropdown".$counter1."\">\n";
				$counter2 = 0;
				foreach ($out1 as $out2) {
					$code .= "<li";
					if ($counter1 == $firstLvl && $counter2 == $secondLvl) {
						$code .= " class=\"current\"";
					}
					$code .= ">\n";
					$path = $this->pathHelper2ndLvl($key).$out2['fileName'];
					$code .= "<a href=\"".$path."\">".$out2['linkText']."</a>";
					$code .= "</li>\n";
					$counter2++;
				}
				$code .= "</ul>\n";
				$code .= "<!-- End dropdown -->\n";
			}
			$code .= "</li>\n";
			$counter1++;
		}
		$code .= "</ul>\n";
		// Hamburger
		$code .= "<div id=\"hamburger\">\n";
		$code .= "<button type=\"button\" aria-haspopup=\"true\" aria-expanded=\"false\" aria-label=\"Open/Close Navigation\">☰</button>\n";
		$code .= "</div>\n";
		$code .= "</nav>\n";
		return $code;
	}
	
	/* Helper-Methods: There is no need for that,
	if you are using this project in a virtual host */
	private function pathHelperHome() {
		if (basename(getcwd()) != $this->topFolder) {
			return "../";
		}
	}
	
	private function pathHelper2ndLvl($folder) {
		if (basename(getcwd()) == $this->topFolder) {
			return $folder."/";
		}
	
		elseif (basename(getcwd()) != $folder) {
			return "../".$folder."/";
		}
	}
	
	/* NOTCH START */
	/* Write a sitmap.xml */
	public function writeSitemap() {
		// Your domain
		$domain = "https://mydomain.ch/";
		
		// Array für error reporting
		$errors = [];
	
		$code = "";
		// XML prolog
		$code .= "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n";
		// XML root element
		$code .= "<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\r\n";
		
		// Add the URL of the homepage
		$code .= "\t<url>\r\n";
		$home = $domain."index.php";
		$code .= "\t\t<loc>".$home."</loc>\r\n";
		$fileTimeHome = filemtime("index.php");
		$lastModifiedHome = date("Y-m-d", $fileTimeHome);
		$code .= "\t\t<lastmod>".$lastModifiedHome."</lastmod>\r\n";
		$code .= "\t</url>\r\n";
		
		// All pages
		foreach ($this->structure as  $key => $out1) {
			$folder = $key."/";
			foreach ($out1 as $out2) {
  				$file = $folder.$out2['fileName'];
				if (file_exists($file)) {
					$code .= "\t<url>\n";
					$url = $domain.$file;
					$code .= "\t\t<loc>".$url."</loc>\r\n";
					$fileTime = filemtime($file);
    				$lastModified = date("Y-m-d", $fileTime);
    				$code .= "\t\t<lastmod>".$lastModified."</lastmod>\r\n";
    				$code .= "\t</url>\r\n";
				}
				else {
					$errors[] = "Nicht gefunden: ".$file;
				}
    		}
    	}
    	// End XML root element
		$code .= "</urlset>\r\n";
		
		// Write Sitemap-File 
		$handle = fopen("sitemap.xml","w");
		fwrite($handle,$code);
		fclose($handle);
		
		// Are there errors?
		$nrErrors = count($errors);
		
		if ($nrErrors > 0) {
			$str = "Ich habe die Sitemap geschrieben. Leider konnte ich nicht alle Files finden:<br>";
			foreach ($errors as $out3){
				$str .= $out3."<br>";
			}
			$str .= "<br><strong>Bitte checke das Array mit der Struktur nochmals!</strong>";
			return $str;
		}
		else {
			return "Es gab keine Fehler. Habe das Sitemap-File geschrieben.";
		}
	}
	/* NOTCH END */
}
?>