<?php
# Lifter002: TODO
# Lifter007: TODO
# Lifter003: TODO
# Lifter010: TODO
/**
 * HTML-class for the Stud.IP-project.
 * Based on scripts from "http://tut.php-q.net/".
 *
 * @author  Alexander Willner <mail@AlexanderWillner.de>
 *
 * @copyright   2004 Stud.IP-Project
 * @access      public
 * @package     evaluation
 * @modulegroup evaluation_modules
 *
 */

// +--------------------------------------------------------------------------+
// This file is part of Stud.IP
// Copyright (C) 2001-2004 Stud.IP
// +--------------------------------------------------------------------------+
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or any later version.
// +--------------------------------------------------------------------------+
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// +--------------------------------------------------------------------------+

class HTMLempty
{

# Define all required variables ============================================= #
    /**
     * Holds the name of the element.
     *
     * @access   private
     * @var      string $_name
     */
    var $_name = "";

    /**
     * Holds the attributes of the element.
     *
     * @access   private
     * @var      array $_attribute
     */
    var $_attribute = [];

    /**
     * Holds additional attributes (strings generated from studip functions)
     *
     * @access   private
     * @var      array $_string
     */
    var $_string = "";
# ============================================================ end: variables #


# Define constructor and destructor ========================================= #
    public function __construct($name)
    {
        if (preg_match('/^[a-zA-Z.:][\w\-_\.:]*$/i', $name)) {
            $this->_name = $name;
        } else {
            trigger_error("Unerlaubter Name für ein HTML-Element : '" . $name . "'", E_USER_ERROR);
        }
    }

    /**
     *
     */
    public function addAttr($name, $wert = null)
    {
        if (isset ($wert)) {
            $name = (string)$name;
            if (preg_match('/^[a-zA-Z.:][\w\-_\.:]*$/i', $name)) {
                $this->_attribute[$name] = $wert;
            } else {
                trigger_error("Unerlaubter Name für ein HTML-Attribut : '" . $name . "'", E_USER_ERROR);
            }
        } else {
            if (is_scalar($name)) {
                // Dies braucht man, falls man Attribute hinzufügen
                // will, die keinen Wert haben, wie man es bei
                // <option selected> kennt
                if (preg_match('/^[a-zA-Z\.:][\w\-_\.:]*$/i', $name)) {
                    $this->_attribute[$name] = $name;
                    // Da wir gültiges HTML bzw XML schreiben
                    // muss jedes Attribut auch einen Wert haben
                    // selected wird dann zu selected="selected"
                } else {
                    trigger_error("Unerlaubter Name für ein HTML-Attribut : '" . $name . "'", E_USER_ERROR);
                }
            } elseif (is_array($name)) {
                // Jedes Arrayelement durchgehen
                foreach ($name as $key => $wert) {
                    if (is_int($key)) {
                        // Arrayelement wurde mit $foo[] hinzugefügt
                        // also ohne Schlüssel. Ich nehme dann an
                        // das es sich um ein Attribut wie
                        // 'selected' oder 'readonly' handelt
                        if (preg_match('/^[a-zA-Z\.:][\w\-_\.:]*$/i', $wert)) {
                            $this->_attribute[$wert] = $wert;
                        } else {
                            trigger_error("Unerlaubter Name für ein HTML-Attribut : '" .
                                $wert . "'", E_USER_ERROR);
                        }
                    } else {
                        $key = (string)$key;
                        if (preg_match('/^[a-zA-Z\.:][\w\-_\.:]*$/i', $key)) {
                            $this->_attribute[$key] = $wert;
                        } else {
                            trigger_error("Unerlaubter Name für ein HTML-Attribut : '" .
                                $key . "'", E_USER_ERROR);
                        }
                    }
                }
            } else {
                trigger_error("Erster Parameter muss ein Scalar oder ein Array sein",
                    E_USER_ERROR);
            }
        }
    }

    /**
     * to support Stud.IP legacy functions like makeButton...
     */
    public function addString($string)
    {
        if (is_array($string)) {
            $string = implode(' ', $string);
        }
        $this->_string .= " " . $string;
    }

    /**
     *
     */
    public function getName()
    {
        return $this->_name;
    }

    /**
     *
     */
    public function getAttr()
    {
        return $this->_attribute;
    }

    /**
     *
     */
    public function printContent($indent = 0)
    {
        echo $this->createContent($indent);
    }

    /**
     *
     */
    public function createContent($indent = 0)
    {
        $str = str_repeat(' ', $indent);
        $str .= "<" . $this->getName();
        $attrib = $this->getAttr();
        foreach ($attrib as $name => $value) {
            $str .= ' ' . $name . '="' . htmlReady($value) . '"';
        }
        $str .= $this->_string;
        $str .= ">\n";

        return ($str);
    }
}