Move the original PHP site into legacy/

The PHP sources, templates and old jQuery-based scripts move unchanged into
legacy/ for reference. Shared assets (media/, images/, favicon.ico, the
default avatar) stay at the repository root.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

legacy/lib/keyword.php

@@ -0,0 +1,41 @@
+<?php
+require_once( 'lib/config.php' );
+
+class Keyword {
+	// Get a keyword from a string
+	// ----------------------------------------------------------------------------
+	public static function get( $kw ) {
+		// narf, since the .php source files are saved as 8859-1 (php doesn't like BOMs)
+		// utf8_decode is invoked, so str_replace actually finds something for these 8859-1 
+		// encoded special chars
+		
+		$kw = utf8_decode( $kw );
+		$kw = str_replace( array( 'Ä','Ö','Ü','ä','ö','ü','ß',"'" ), array( 'Ae','Oe','Ue','ae','oe','ue','ss','' ), $kw );
+		$kw = preg_replace( '/[^a-zA-Z\d]+/', '#', $kw ); 
+		$kw = preg_replace( '/^\#+|\#+$/', '', $kw ); // Trim seperators
+		$kw = str_replace( '#', Config::$keywordWordSeperator, $kw ); // replace # with final word seperator
+		
+		if( $kw == "" ) {// no keyword?
+			$kw = 'Untitled'; // Assign default keyword
+		}
+		$kw = strtolower( $kw );
+		return $kw;
+	}
+	
+	// Check if a keyword has allready been taken. if so, return $keyword-N, where N is an increasing number
+	// ----------------------------------------------------------------------------	
+	public static function iterate( $kw, $taken ) {
+		$kwLower = strtolower( $kw );
+		if( in_array( $kwLower, $taken ) ) {
+			for( $i = 2; in_array( $kwLower, $taken); $i++ ) {
+				$kwLower = strtolower( $kw . Config::$keywordWordSeperator . $i );
+			}
+			return $kw . Config::$keywordWordSeperator . ( $i-1 );
+		}
+		else {
+			return $kw;
+		}
+	}
+}
+
+?>