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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* hold the PMA_List base class
*
* @version $Id$
* @package phpMyAdmin
*/
/**
* @todo add caching
* @since phpMyAdmin 2.9.10
* @abstract
* @package phpMyAdmin
*/
abstract class PMA_List extends ArrayObject
{
/**
* @var mixed empty item
*/
protected $item_empty = '';
public function __construct($array = array(), $flags = 0, $iterator_class = "ArrayIterator")
{
parent::__construct($array, $flags, $iterator_class);
}
/**
* returns item only if there is only one in the list
*
* @uses count()
* @uses reset()
* @uses PMA_List::getEmpty() to return it
* @return single item
*/
public function getSingleItem()
{
if (count($this) === 1) {
return reset($this);
}
return $this->getEmpty();
}
/**
* defines what is an empty item (0, '', false or null)
*
* @uses PMA_List::$item_empty as return value
* @return mixed an empty item
*/
public function getEmpty()
{
return $this->item_empty;
}
/**
* checks if the given db names exists in the current list, if there is
* missing at least one item it returns false otherwise true
*
* @uses PMA_List::$items to check for existence of specific item
* @uses func_get_args()
* @uses in_array() to check if given arguments exists in PMA_List::$items
* @param string $db_name,.. one or more mysql result resources
* @return boolean true if all items exists, otheriwse false
*/
public function exists()
{
$this_elements = $this->getArrayCopy();
foreach (func_get_args() as $result) {
if (! in_array($result, $this_elements)) {
return false;
}
}
return true;
}
/**
* returns HTML <option>-tags to be used inside <select></select>
*
* @uses PMA_List::$items to build up the option items
* @uses PMA_List::getDefault() to mark this as selected if requested
* @uses htmlspecialchars() to escape items
* @param mixed $selected the selected db or true for selecting current db
* @param boolean $include_information_schema
* @return string HTML option tags
*/
public function getHtmlOptions($selected = '', $include_information_schema = true)
{
if (true === $selected) {
$selected = $this->getDefault();
}
$options = '';
foreach ($this as $each_item) {
if (false === $include_information_schema && 'information_schema' === $each_item) {
continue;
}
$options .= '<option value="' . htmlspecialchars($each_item) . '"';
if ($selected === $each_item) {
$options .= ' selected="selected"';
}
$options .= '>' . htmlspecialchars($each_item) . '</option>' . "\n";
}
return $options;
}
/**
* returns default item
*
* @uses PMA_List::getEmpty() as fallback
* @return string default item
*/
public function getDefault()
{
return $this->getEmpty();
}
/**
* builds up the list
*
*/
abstract public function build();
}
?>
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