<?php
/*
$Id$

  This code is part of LDAP Account Manager (http://www.ldap-account-manager.org/)
  Copyright (C) 2010  Roland Gruber

  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
  (at your option) 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

*/

/**
* Interface between modules and other parts of LAM.
*
* @package metaHTML
* @author Roland Gruber
*/

/**
 * Represents a HTML element.
 * This is used to build HTML code by using objects.
 * 
 * @package metaHTML
 */
abstract class htmlElement {
	
	const OPTION_ALIGN = 0;
	
	const ALIGN_TOP = 0;
	const ALIGN_LEFT = 1;
	const ALIGN_RIGHT = 2;
	const ALIGN_BOTTOM = 3;
	const ALIGN_CENTER = 4;
	
	/** alignment when inside a table */
	public $alignment = null;
	/** colspan if inside a table */
	public $colspan = null;
	/** rowspan if inside a table */
	public $rowspan = null;

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	abstract function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope);
	
	/**
	 * Returns the HTML attributes for the alignment.
	 * 
	 * @return String alignment HTML attributes (e.g. align="right" valign="top")
	 */
	public function getAlignmentString() {
		$align = '';
		if ($this->alignment !== null) {
			switch ($this->alignment) {
				case htmlElement::ALIGN_BOTTOM:
					$align = 'valign="bottom"';
				break;
				case htmlElement::ALIGN_TOP:
					$align = 'valign="top"';
				break;
				case htmlElement::ALIGN_LEFT:
					$align = 'align="left"';
				break;
				case htmlElement::ALIGN_RIGHT:
					$align = 'align="right"';
				break;
				case htmlElement::ALIGN_CENTER:
					$align = 'align="center"';
				break;
			}
		}
		return $align;
	}

	/**
	 * Returns the HTML attribute for the colspan.
	 * 
	 * @return String colspan HTML attribute (e.g. colspan=3)
	 */
	public function getColspanString() {
		if ($this->colspan == null) {
			return '';
		}
		else return 'colspan="' . $this->colspan . '"';
	}
	
	/**
	 * Returns the HTML attribute for the rowspan.
	 * 
	 * @return String rowspan HTML attribute (e.g. rowspan=3)
	 */
	public function getRowspanString() {
		if ($this->rowspan == null) {
			return '';
		}
		else return 'rowspan="' . $this->rowspan . '"';
	}

}

/**
 * Structures elements using a table.
 *
 * @package metaHTML
 */
class htmlTable extends htmlElement {

	/** table header */
	const header = "<table>\n";
	/** table footer */
	const footer = "</table>\n";
	/** new line */
	const newLine = "</tr><tr>\n";
	
	/** list of subelements */
	private $elements = array();
	/** specifies if currently a row is open */
	private $rowOpen = false;

	/**
	 * Adds an element to the table. The element may be a htmlElement object or a simple String.
	 *
	 * @param mixed $element htmlElement object or a simple String
	 * @param boolean $newLine adds a new line after the element (optional, default false)
	 * @param array $options list of options (e.g. htmlElement::OPTION_ALIGN => htmlElement::ALIGN_TOP)
	 */
	public function addElement($element, $newLine = false) {
		// add row element
		if ($element instanceof htmlTableRow) {
			// check if a row needs to be closed
			if ($this->rowOpen) {
				$this->elements[] = "</tr>\n";
				$this->rowOpen = false;
			}
			$this->elements[] = $element;
		}
		// add cell element
		elseif ($element instanceof htmlElement) {
			// check if a row needs to be opened
			if (!$this->rowOpen) {
				$this->elements[] = "<tr>\n";
				$this->rowOpen = true;
			}
			// check if alignment option was given
			$align = $element->getAlignmentString();
			$colspan = $element->getColspanString();
			$rowspan = $element->getRowspanString();
			$this->elements[] = "<td $align $colspan $rowspan>\n";
			$this->elements[] = $element;
			$this->elements[] = "</td>\n";
			if ($newLine) {
				$this->addNewLine();
			}
		}
		else {
			StatusMessage('ERROR', 'Invalid element', print_r($element, true));
		}
	}
	
	/**
	 * Adds another line to the table.
	 */
	public function addNewLine() {
		if (!$this->rowOpen) {
			$this->elements[] = "<tr>\n";
		}
		else {
			$this->elements[] = htmlTable::newLine;
		}
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	public function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$return = array();
		echo htmlTable::header;
		// print all contained elements
		for ($i = 0; $i < sizeof($this->elements); $i++) {
			// print htmlElement objects
			if ($this->elements[$i] instanceof htmlElement) {
				$fields = $this->elements[$i]->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
				$return = array_merge($return, $fields);
			}
			// print simple Strings
			else {
				if ($i != (sizeof($this->elements) - 1) || !($this->elements[$i] == htmlTable::newLine) ) {
					echo $this->elements[$i];
				}
			}
		}
		if ($this->rowOpen) {
			echo "</tr>\n";
		}
		echo htmlTable::footer;
		return $return;
	}
	
	/**
	 * Merges the content of another htmlTable object into this table.
	 * 
	 * @param $table table to get elements
	 */
	public function mergeTableElements($table) {
		if (is_null($table) || !($table instanceof htmlTable)) {
			return;
		}
		// remove obsolete new lines at the end
		if ($table->elements[sizeof($table->elements) - 1] == htmlTable::newLine) {
			unset($table->elements[sizeof($table->elements) - 1]);
		}
		// close last row of other table if needed
		if ($table->rowOpen) {
			$table->elements[] = "</tr>\n";
		}
		// close last own row if needed
		if ($this->rowOpen) {
			if ($this->elements[sizeof($this->elements) - 1] == htmlTable::newLine) {
				unset($this->elements[sizeof($this->elements) - 1]);
			}
			else {
				$this->elements[] = "</tr>\n";
			}
			$this->rowOpen = false;
		}
		$this->elements = array_merge($this->elements, $table->elements);
	}

}

/**
 * A row inside a htmlTable.
 * 
 * @see htmlTable
 * @package metaHTML
 */
class htmlTableRow extends htmlElement {

	private $cells;
	
	/**
	 * Constructor
	 * 
	 * @param array $cells list of htmlElements
	 * @see htmlElement
	 */
	function __construct($cells) {
		$this->cells = $cells;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$types = array();
		echo "<tr>\n";
			for ($i = 0; $i < sizeof($this->cells); $i++) {
				// check if alignment option was given
				$align = $this->cells[$i]->getAlignmentString();
				$colspan = $this->cells[$i]->getColspanString();
				$rowspan = $this->cells[$i]->getRowspanString();
				echo "<td $align $colspan $rowspan>\n";
				$types = array_merge($types, $this->cells[$i]->generateHTML($module, $input, $values, $restricted, $tabindex, $scope));
				echo "</td>\n";
			}
		echo "</tr>";
		return $types;
	}

}

/**
 * A standard input field.
 * 
 * @package metaHTML
 */
class htmlInputField extends htmlElement {

	/** unique field name */
	private $fieldName;
	/** field value */
	private $fieldValue;
	/** field size (default 30) */
	private $fieldSize = 30;
	/** field max length (default 255) */
	private $fieldMaxLength = 255;
	/** password field */
	private $isPassword = false;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor
	 *
	 * @param String $fieldName unique field name
	 * @param String $fieldValue value of input field (optional)
	 */
	function __construct($fieldName, $fieldValue = null) {
		$this->fieldName = htmlspecialchars($fieldName);
		$this->fieldValue = htmlspecialchars($fieldValue);
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if (isset($values[$this->fieldName])) {
			$this->fieldValue = $values[$this->fieldName][0];
		}
		// print input field
		$name = ' name="' . $this->fieldName . '"';
		$value = '';
		if ($this->fieldValue != null) {
			$value = ' value="' . $this->fieldValue . '"';
		}
		$maxLength = '';
		if ($this->fieldMaxLength != null) {
			$maxLength = ' maxlength="' . $this->fieldMaxLength . '"';
		}
		$size = ' size="' . $this->fieldSize . '"';
		$fieldTabIndex = ' tabindex="' . $tabindex . '"';
		$tabindex++;
		$inputType = 'text';
		if ($this->isPassword) {
			$inputType = 'password';
		}
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		echo '<input type="' . $inputType . '"' . $name . $value . $maxLength . $size . $fieldTabIndex . $disabled . '>';
		return array($this->fieldName => 'text');
	}

	/**
	 * Sets the maximum field length.
	 * 
	 * @param int $fieldMaxLength length
	 */
	public function setFieldMaxLength($fieldMaxLength) {
		$this->fieldMaxLength = $fieldMaxLength;
	}
	
	/**
	 * Sets the field size.
	 * 
	 * @param int $fieldSize size
	 */
	public function setFieldSize($fieldSize) {
		$this->fieldSize = $fieldSize;
	}

	/**
	 * Specifies if this is a password field.
	 * 
	 * @param boolean $isPassword password field
	 */
	public function setIsPassword($isPassword) {
		$this->isPassword = $isPassword;
	}

	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * An extended input field that combines label, input field and help.
 * 
 * @package metaHTML
 */
class htmlTableExtendedInputField extends htmlInputField {

	/** Descriptive label */
	private $label;
	/** help ID */
	private $helpID;
	/** required field */
	private $required = false;
	
	/**
	 * Constructor
	 *
	 * @param String $label descriptive label
	 * @param String $fieldName unique field name
	 * @param String $fieldValue value of input field (optional)
	 * @param String $helpID help ID (optional)
	 */
	function __construct($label, $fieldName, $fieldValue = null, $helpID = null) {
		parent::__construct($fieldName, $fieldValue);
		$this->label = htmlspecialchars($label);
		$this->helpID = $helpID;
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		// print label text
		echo $this->label;
		if ($this->required) {
			echo '*';
		}
		echo "\n</td>\n<td>\n";
		// print input field
		$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		// print help link
		if ($this->helpID != null) {
			echo "\n</td>\n<td>\n";
			$helpLink = new htmlHelpLink($this->helpID);
			$helpLink->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		return $return;
	}

	/**
	 * Specifies if this input field must be filled.
	 * 
	 * @param boolean $required required or not
	 */
	public function setRequired($required) {
		$this->required = $required;
	}

}

/**
 * Renders a help link.
 * 
 * @package metaHTML
 */
class htmlHelpLink extends htmlElement {
	
	/** help ID */
	private $helpID;
	
	/**
	 * Constructor
	 *
	 * @param String $helpID help ID
	 */
	function __construct($helpID) {
		$this->helpID = $helpID;
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$helpEntry = getHelp($module, $this->helpID, $scope);
		printHelpLink($helpEntry, $this->helpID, $module, $scope);
		return array();
	}

}

/**
 * Simple button.
 *
 * @package metaHTML
 */
class htmlButton extends htmlElement {
	
	/** button name */
	protected $name;
	/** button text or image */
	protected $value;
	/** image button or text button */
	protected $isImageButton;
	/** title */
	private $title = null;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor.
	 *
	 * @param String $name button name
	 * @param String $value button text or image (16x16px, relative to graphics folder)
	 * @param String $isImageButton image or text button (default text)
	 */
	function __construct($name, $value, $isImageButton = false) {
		$this->name = htmlspecialchars($name);
		$this->value = htmlspecialchars($value);
		$this->isImageButton = $isImageButton;
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if ($restricted) {
			// no buttons in restricted mode
			logNewMessage(LOG_ERR, 'Meta HTML: Requested button in restricted mode.');
			return array();
		}
		$style = '';
		$class = '';
		$title = '';
		$name = ' name="' . $this->name . '"';
		// image button
		if ($this->isImageButton) {
			$class = ' class="smallImageButton"';
			$style = ' style="background-image: url(../../graphics/' . $this->value . ');"';
		}
		// text button
		else {
			$class = ' class="smallPadding"';
		}
		if ($this->title != null) {
			$title = ' title="' . $this->title . '"';
		}
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		if ($this->isImageButton) {
			echo '<input type="submit" id="btn_' . $this->name . '" value=" "' . $name . $style . $class . $title . $disabled . '>';
		}
		else {
			echo '<button id="btn_' . $this->name . '"' . $name . $style . $class . $title . $disabled . '>' . $this->value . '</button>';
			// text buttons get JQuery style
			echo '<script type="text/javascript">';
			echo ' jQuery(document).ready(function() {';
			echo "jQuery('#btn_" . $this->name . "').button();";
			echo '});';
			echo '</script>';
		}
		return array($this->name => 'submit');
	}
	
	/**
	 * Sets the button title (tooltip).
	 * 
	 * @param String $title title
	 */
	public function setTitle($title) {
		$this->title = htmlspecialchars($title);
	}

	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * Prints a button for the account pages.
 *
 * @package metaHTML
 */
class htmlAccountPageButton extends htmlButton {
	
	/**
	 * Constructor
	 *
	 * @param String $targetModule module name which renders next page
	 * @param String $targetPage name of next page
	 * @param String $identifier identifier for button
	 * @param String $value button text or image (16x16px, relative to graphics folder)
	 * @param String $isImageButton image or text button (default text)
	 */
	function __construct($targetModule, $targetPage, $identifier, $value, $isImageButton = false) {
		$this->name = htmlspecialchars('form_subpage_' . $targetModule . '_' . $targetPage . '_' . $identifier);
		$this->value = $value;
		$this->isImageButton = $isImageButton;
	}
	
}

/**
 * Represents a select box.
 *
 * @package metaHTML
 */
class htmlSelect extends htmlElement {
	
	/** name of select field */
	private $name;
	/** size */
	private $size;
	/** allows multi-selection */
	private $multiSelect = false;
	/** elements */
	private $elements;
	/** selected elements */
	private $selectedElements;
	/** descriptive elements */
	private $hasDescriptiveElements = false;
	/** contains optgroups */
	private $containsOptgroups = false;
	/** sorting enabled */
	private $sortElements = true;
	/** right to left text direction */
	private $rightToLeftTextDirection = false;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor.
	 * 
	 * <br>Examples:
	 * <br>
	 * <br>$select = new htmlSelect('myName', array('value1', 'value2'), array('value1'));
	 * <br>
	 * <br>$select = new htmlSelect('myName', array('label1' => 'value1', 'label2' => 'value2'), array('value1'));
	 * <br>$select->setHasDescriptiveElements(true);
	 * <br>
	 * <br>$select = new htmlSelect('myName', array('optgroupLabel' => array('value1', 'value2')), array('value1'));
	 * <br>$select->setHasDescriptiveElements(true);
	 * <br>$select->setContainsOptgroups(true);
	 * 
	 * @param String $name element name
	 * @param array $elements list of elements array(label => value) or array(value1, value2) or array('optgroup' => array(...))
	 * @param array $selectedElements list of selected elements (optional, default none)
	 * @param int $size size (optional, default = 1)
	 */
	function __construct($name, $elements, $selectedElements = array(), $size = 1) {
		$this->name = htmlspecialchars($name);
		$this->elements = $elements;
		$this->selectedElements = $selectedElements;
		$this->size = htmlspecialchars($size);
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if (isset($values[$this->name])) {
			$this->selectedElements = $values[$this->name];
		}
		$multi = '';
		if ($this->multiSelect) {
			$multi = ' multiple';
			$this->name = $this->name . '[]';
		}
		$name = ' name="' . $this->name . '"';
		$size = ' size="' . $this->size . '"';
		$class = '';
		if ($this->rightToLeftTextDirection) {
			$class = ' class="rightToLeftText"';
		}
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		echo '<select' . $class . $name . $size . $multi . $disabled . ' tabindex="' . $tabindex . "\">\n";
		$tabindex++;
		if ($this->containsOptgroups) {
			foreach ($this->elements as $label => $elements) {
				if (sizeof($elements) > 0) {
					echo '<optgroup label="' . $label . '">';
					$this->printOptionsHTML($elements);
					echo '</optgroup>';
				}
			}
		}
		else {
			$this->printOptionsHTML($this->elements);
		}
		echo "</select>\n";
		if ($this->multiSelect) {
			return array($this->name => 'multiselect');
		}
		else {
			return array($this->name => 'select');
		}
	}
	
	/**
	 * Prints the HTML code of the option tags.
	 *
	 * @param array $elements list of options
	 */
	private function printOptionsHTML($elements) {
		// sorting
		if ($this->sortElements) {
			if ($this->hasDescriptiveElements) {
				$labels = array_keys($elements);
				natcasesort($labels);
				$newElements = array();
				foreach ($labels as $label) {
					$newElements[$label] = $elements[$label];
				}
				$elements = $newElements;
			}
			else {
				natcasesort($elements);
			}
		}
		foreach ($elements as $key => $value) {
			$selected = '';
			if ($this->hasDescriptiveElements) {
				if (in_array($value, $this->selectedElements)) {
					$selected = ' selected';
				}
				echo "<option value=\"" . htmlspecialchars($value) . "\"$selected>" . htmlspecialchars($key) . "</option>\n";
			}
			else {
				if (in_array($value, $this->selectedElements)) {
					$selected = ' selected';
				}
				echo "<option$selected>" . htmlspecialchars($value) . "</option>\n";
			}
		}
	}
	
	/**
	 * Specifies if the elements are just a simple list or an assoziative array (default: simple list). 
	 * 
	 * @param boolean $hasDescriptiveElements activates descriptive elements
	 */
	public function setHasDescriptiveElements($hasDescriptiveElements) {
		$this->hasDescriptiveElements = $hasDescriptiveElements;
	}
	
	/**
	 * Specifies if the elements are divided into optgroups. 
	 * 
	 * @param boolean $containsOptgroups activates optgroups
	 */
	public function setContainsOptgroups($containsOptgroups) {
		$this->containsOptgroups = $containsOptgroups;
	}
	
	/**
	 * Specifies if multi-selection is enabled (default: disabled).
	 * 
	 * @param boolean $multiSelect allows multi-selection
	 */
	public function setMultiSelect($multiSelect) {
		$this->multiSelect = $multiSelect;
	}
	
	/**
	 * Specifies if the elemets should be sorted (default: sort).
	 * 
	 * @param boolean $sortElements sort elements
	 */
	public function setSortElements($sortElements) {
		$this->sortElements = $sortElements;
	}

	/**
	 * Specifies if the text direction should be set to right to left.
	 * 
	 * @param boolean $rightToLeftTextDirection if true use right to left direction
	 */
	public function setRightToLeftTextDirection($rightToLeftTextDirection) {
		$this->rightToLeftTextDirection = $rightToLeftTextDirection;
	}
	
	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * Select with label and help link.
 * 
 * @package metaHTML
 */
class htmlTableExtendedSelect extends htmlSelect {

	/** descriptive label */
	private $label;
	/** help ID */
	private $helpID;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name element name
	 * @param array $elements list of elememts
	 * @param array $selectedElements list of selected elements
	 * @param String $label descriptive label
	 * @param String $helpID help ID (optional, default none)
	 * @param int $size size (optional, default = 1)
	 */
	function __construct($name, $elements, $selectedElements, $label, $helpID = null, $size = 1) {
		parent::__construct($name, $elements, $selectedElements, $size);
		$this->label = htmlspecialchars($label);
		$this->helpID = $helpID;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo $this->label;
		echo "\n</td>\n<td>\n";
		$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		// print help link
		if ($this->helpID != null) {
			echo "\n</td>\n<td>\n";
			$helpLink = new htmlHelpLink($this->helpID);
			$helpLink->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		return $return;
	}
	
}

/**
 * Prints the text and escapes contained HTML code by default.
 * 
 * @package metaHTML
 */
class htmlOutputText extends htmlElement {

	/** the text to print */
	private $string;
	/** specifies if HTML code should be escaped */
	private $escapeHTML;

	/**
	 * Constructor.
	 * 
	 * @param String $string output text
	 * @param boolean $escapeHTML escape HTML code (default yes)
	 */
	function __construct($string, $escapeHTML = true) {
		$this->string = $string;
		$this->escapeHTML = $escapeHTML;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if ($this->escapeHTML) {
			echo htmlspecialchars($this->string);
		}
		else {
			echo $this->string;
		}
		return array();
	}

}

/**
 * Prints the HTML code for a checkbox.
 * 
 * @package metaHTML
 */
class htmlInputCheckbox extends htmlElement {
	
	/** unique name of input element */
	private $name;
	/** value */
	private $checked;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 * @param boolean $checked checked 
	 */
	function __construct($name, $checked) {
		$this->name = htmlspecialchars($name);
		$this->checked = $checked;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if (isset($values[$this->name])) {
			if ($values[$this->name][0] == 'true') {
				$this->checked = true;
			}
			else {
				$this->checked = false;
			}
		}
		$checked = '';
		if ($this->checked) {
			$checked = ' checked';
		}
		$tabindexValue = ' tabindex="' . $tabindex . '"';
		$tabindex++;
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		echo '<input type="checkbox" name="' . $this->name . '"' . $tabindexValue . $checked . $disabled . '>';
		return array($this->name => 'checkbox');
	}

	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * Checkbox with descriptive label and help link.
 * 
 * @package metaHTML
 */
class htmlTableExtendedInputCheckbox extends htmlInputCheckbox {

	/** descriptive label */
	private $label;
	/** help ID */
	private $helpID;
	/** specifies if label is printed before the checkbox */
	private $labelFirst;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 * @param boolean $checked checked 
	 * @param String $label descriptive label
	 * @param String $helpID help ID
	 * @param boolean $labelFirst specifies if the label is at the beginning or at the end (optional, default beginning)
	 */
	function __construct($name, $checked, $label, $helpID = null, $labelFirst = true) {
		parent::__construct($name, $checked);
		$this->label = htmlspecialchars($label);
		$this->helpID = $helpID;
		$this->labelFirst = $labelFirst;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if ($this->labelFirst) {
			echo $this->label;
			echo "\n</td>\n<td>\n";
			$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		else {
			$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
			echo "\n</td>\n<td>\n";
			echo $this->label;
		}
		// print help link
		if ($this->helpID != null) {
			echo "\n</td>\n<td>\n";
			$helpLink = new htmlHelpLink($this->helpID);
			$helpLink->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		return $return;
	}
	
}

/**
 * Prints the HTML code for a file upload field.
 * 
 * @package metaHTML
 */
class htmlInputFileUpload extends htmlElement {
	
	/** unique name of input element */
	private $name;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 */
	function __construct($name) {
		$this->name = htmlspecialchars($name);
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$tabindexValue = ' tabindex="' . $tabindex . '"';
		$tabindex++;
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		echo '<input type="file" name="' . $this->name . '"' . $tabindexValue . $disabled . '>';
		return array($this->name => 'file');
	}

	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * File upload with descriptive label and help link.
 * 
 * @package metaHTML
 */
class htmlTableExtendedInputFileUpload extends htmlInputFileUpload {

	/** descriptive label */
	private $label;
	/** help ID */
	private $helpID;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 * @param String $label descriptive label
	 * @param String $helpID help ID
	 */
	function __construct($name, $label, $helpID = null) {
		parent::__construct($name);
		$this->label = htmlspecialchars($label);
		$this->helpID = $helpID;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo $this->label;
		echo "\n</td>\n<td>\n";
		$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		// print help link
		if ($this->helpID != null) {
			echo "\n</td>\n<td>\n";
			$helpLink = new htmlHelpLink($this->helpID);
			$helpLink->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		return $return;
	}
	
}

/**
 * Prints the HTML code for a textarea.
 * 
 * @package metaHTML
 */
class htmlInputTextarea extends htmlElement {
	
	/** unique name of input element */
	private $name;
	/** value */
	private $value;
	/** column count */
	private $colCount;
	/** row count */
	private $rowCount;
	/** enabled or disabled */
	private $isEnabled = true;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 * @param String $value value 
	 * @param int $colCount number of characters per line
	 * @param int $rowCount number of rows
	 */
	function __construct($name, $value, $colCount, $rowCount) {
		$this->name = htmlspecialchars($name);
		$this->value = htmlspecialchars($value);
		$this->colCount = $colCount;
		$this->rowCount = $rowCount;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		if (isset($values[$this->name])) {
			$this->value = implode("\r\n", $values[$this->name]);
		}
		$colCount = ' cols="' . $this->colCount . '"';
		$rowCount = ' rows="' . $this->rowCount . '"';
		$tabindexValue = ' tabindex="' . $tabindex . '"';
		$tabindex++;
		$disabled = '';
		if (!$this->isEnabled) {
			$disabled = ' disabled';
		}
		echo '<textarea name="' . $this->name . '"' . $tabindexValue . $colCount . $rowCount . $disabled . '>' . $this->value . '</textarea>';
		return array($this->name => 'textarea');
	}

	/**
	 * Specifies if this component is enabled and accepts user modification.
	 * 
	 * @param boolean $isEnabled enabled if true
	 */
	public function setIsEnabled($isEnabled) {
		$this->isEnabled = $isEnabled;
	}

}

/**
 * Text area with label and help link.
 * 
 * @package metaHTML
 */
class htmlTableExtendedInputTextarea extends htmlInputTextarea {

	/** descriptive label */
	private $label;
	/** help ID */
	private $helpID;
	/** required field */
	private $required = false;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name unique name
	 * @param String $value value 
	 * @param int $colCount number of characters per line
	 * @param int $rowCount number of rows
	 * @param String $label descriptive label
	 * @param String $helpID help ID
	 */
	function __construct($name, $value, $colCount, $rowCount, $label, $helpID) {
		parent::__construct($name, $value, $colCount, $rowCount);
		$this->label = htmlspecialchars($label);
		$this->helpID = $helpID;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo $this->label;
		if ($this->required) {
			echo '*';
		}
		echo "\n</td>\n<td>\n";
		$return = parent::generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		// print help link
		if ($this->helpID != null) {
			echo "\n</td>\n<td>\n";
			$helpLink = new htmlHelpLink($this->helpID);
			$helpLink->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		}
		return $return;
	}
	
	/**
	 * Specifies if this input field must be filled.
	 * 
	 * @param boolean $required required or not
	 */
	public function setRequired($required) {
		$this->required = $required;
	}

}

/**
 * Prints the HTML code for an image.
 * 
 * @package metaHTML
 */
class htmlImage extends htmlElement {
	
	/** path to image */
	private $path;
	/** width */
	private $width;
	/** height */
	private $height;
	/** alt text */
	private $alt;
	
	/**
	 * Constructor.
	 * 
	 * @param String $path image location
	 * @param int $width image width (optional, default original size) 
	 * @param int $height image height (optional, default original size)
	 * @param String $alt alt text (optional)
	 */
	function __construct($path, $width = null, $height = null, $alt = ' ') {
		$this->path = htmlspecialchars($path);
		$this->width = $width;
		$this->height = $height;
		$this->alt = htmlspecialchars($alt);
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$path = ' src="' . $this->path . '"';
		$width = '';
		if ($this->width != null) {
			$width = ' width="' . $this->width . '"';
		}
		$height = '';
		if ($this->height != null) {
			$height = ' height="' . $this->height . '"';
		}
		$alt = ' alt="' . $this->alt . '"';
		echo '<img' . $path . $width . $height . $alt . ">\n";
		return array();
	}

}

/**
 * Adds an empty space with given width and height.
 *
 * @package metaHTML
 */
class htmlSpacer extends htmlElement {
	
	private $width;
	private $height;
	
	/**
	 * Constructor.
	 *
	 * @param String $width width (e.g. 10px)
	 * @param String $height height (e.g. 10px)
	 */
	function __construct($width, $height) {
		$this->width = htmlspecialchars($width);
		$this->height = htmlspecialchars($height);
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$width = '';
		if ($this->width != null) {
			$width = 'width: ' . $this->width . ';';
		}
		$height = '';
		if ($this->height != null) {
			$height = 'height: ' . $this->height . ';';
		}
		echo "<div style=\"$width $height\"></div>\n";
		return array();
	}
	
}

/**
 * Prints a status message (e.g. error message).
 *
 * @package metaHTML
 */
class htmlStatusMessage extends htmlElement {
	
	private $type;
	private $title;
	private $text;
	private $params;
	
	/**
	 * Constructor.
	 *
	 * @param String $type message type (e.g. ERROR)
	 * @param String $title message title
	 * @param String $text message (optional)
	 */
	function __construct($type, $title, $text = null, $params = null) {
		$this->type = $type;
		$this->title = $title;
		$this->text = $text;
		$this->params = $params;
	}
	
	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		StatusMessage($this->type, $this->title, $this->text, $this->params);
		return array();
	}

}
	
/**
 * Generates a fieldset.
 * 
 * @package metaHTML
 */
class htmlFieldset extends htmlElement {

	/** fieldset content */
	private $content;
	/** descriptive label */
	private $label = null;
	/** label image */
	private $labelImage = null;
	
	/**
	 * Constructor.
	 * 
	 * @param htmlElement $content content to display inside fieldset
	 * @param String $label label
	 * @param String $labelImage image to put before label 
	 */
	function __construct($content, $label = null, $labelImage = null) {
		$this->content = $content;
		$this->label = htmlspecialchars($label);
		$this->labelImage = htmlspecialchars($labelImage);
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo "<fieldset>\n";
		// generate legend
		if (($this->label != null) || ($this->labelImage != null)) {
			echo "<legend>";
			if ($this->labelImage != null) {
				echo "<img align=\"middle\" src=\"" . $this->labelImage . "\" alt=\"\"> ";
			}
			if ($this->label != null) {
				echo $this->label;
			}
			echo "</legend>\n";
		}
		$return = $this->content->generateHTML($module, $input, $values, $restricted, $tabindex, $scope);
		echo "</fieldset>\n";
		return $return;
	}
	
}

/**
 * Generates a title line. This is used for page titles.
 * 
 * @package metaHTML
 */
class htmlTitle extends htmlElement {

	/** descriptive label */
	private $label = null;
	
	/**
	 * Constructor.
	 * 
	 * @param String $label label
	 */
	function __construct($label) {
		$this->label = htmlspecialchars($label);
		// the title should not end at a table cell
		$this->colspan = 100;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo "<div class=\"title\">\n";
		echo "<h2 class=\"titleText\">\n";
		echo $this->label;
		echo "</h2>\n";
		echo "</div>\n";
		return array();
	}
	
}

/**
 * Generates a subtitle line. This is used to group multiple fields.
 * 
 * @package metaHTML
 */
class htmlSubTitle extends htmlElement {

	/** descriptive label */
	private $label = null;
	
	/**
	 * Constructor.
	 * 
	 * @param String $label label
	 */
	function __construct($label) {
		$this->label = htmlspecialchars($label);
		// the title should not end at a table cell
		$this->colspan = 100;
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo "<div class=\"subTitle\">\n";
		echo "<h4 class=\"subTitleText\">\n";
		echo $this->label;
		echo "</h4>\n";
		echo "</div>\n";
		return array();
	}
	
}

/**
 * Generates a hidden input field.
 * 
 * @package metaHTML
 */
class htmlHiddenInput extends htmlElement {

	/** field name */
	private $name = null;
	/** field value */
	private $value = null;
	
	/**
	 * Constructor.
	 * 
	 * @param String $name input name
	 * @param String $value input value
	 */
	function __construct($name, $value) {
		$this->name = htmlspecialchars($name);
		$this->value = htmlspecialchars($value);
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		echo '<input type="hidden" name="' . $this->name . '" value="' . $this->value . '">';
		return array();
	}
	
}

/**
 * Generates a link.
 * The link can include an optional image in front of the link text.
 * 
 * @package metaHTML
 */
class htmlLink extends htmlElement {

	/** link text */
	private $text = null;
	/** link target */
	private $target = null;
	/** optional image */
	private $image = null;
	
	/**
	 * Constructor.
	 * 
	 * @param String $label label
	 */
	function __construct($text, $target, $image = null) {
		$this->text = htmlspecialchars($text);
		$this->target = htmlspecialchars($target);
		$this->image = htmlspecialchars($image);
	}

	/**
	 * Prints the HTML code for this element.
	 * 
	 * @param string $module Name of account module
	 * @param array $input List of meta-HTML elements
	 * @param array $values List of values which override the defaults in $input (name => value)
	 * @param boolean $restricted If true then no buttons will be displayed
	 * @param integer $tabindex Start value of tabulator index for input fields
	 * @param string $scope Account type
	 * @return array List of input field names and their type (name => type)
	 */
	function generateHTML($module, $input, $values, $restricted, &$tabindex, $scope) {
		$image = '';
		if ($this->image != null) {
			$image = '<img src="' . $this->image . '" alt="' . $this->text . '">&nbsp;';
		}
		echo '<a href="' . $this->target . '">' . $image . $this->text . '</a>';
		return array();
	}
	
}

?>