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<?php
/**
* The Turba_List:: class provides an interface for dealing with a
* list of Turba_Objects.
*
* $Horde: turba/lib/List.php,v 1.41.10.4 2005/10/18 12:50:05 jan Exp $
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Jon Parise <jon@csh.rit.edu>
* @package Turba
*/
class Turba_List {
/**
* The array containing the Turba_Objects represented in this list.
*
* @var array
*/
var $objects = array();
/**
* The field to compare objects by.
*
* @var string
*/
var $_usortCriteria;
/**
* Constructor.
*/
function Turba_List($ids = array())
{
if ($ids) {
foreach ($ids as $value) {
list($source, $key) = explode(':', $value);
$driver = &Turba_Driver::singleton($source);
if (is_a($driver, 'Turba_Driver')) {
$this->insert($driver->getObject($key));
}
}
}
}
/**
* Inserts a new object into the list.
*
* @param Turba_Object $object The object to insert.
*/
function insert($object)
{
if (is_a($object, 'Turba_Object')) {
$key = $object->getSource() . ':' . $object->getValue('__key');
if (!isset($this->objects[$key])) {
$this->objects[$key] = $object;
}
}
}
/**
* Resets our internal pointer to the beginning of the list. Use this to
* hide the internal storage (array, list, etc.) from client objects.
*/
function reset()
{
reset($this->objects);
}
/**
* Returns the next Turba_Object in the list. Use this to hide internal
* implementation details from client objects.
*
* @return Turba_Object The next object in the list.
*/
function next()
{
list(,$tmp) = each($this->objects);
return $tmp;
}
/**
* Returns the number of Turba_Objects that are in the list. Use this to
* hide internal implementation details from client objects.
*
* @return integer The number of objects in the list.
*/
function count()
{
return count($this->objects);
}
/**
* Filters/Sorts the list based on the specified sort routine.
*
* @param $sort The sort method.
* @param $low The low end of the sort range.
* @param $high The high end of the sort range.
* @param $dir Sort direction, 0 = ascending, 1 = descending
*/
function sort($sort = 'lastname', $dir = 0)
{
global $prefs, $attributes;
$sorted_objects = array();
foreach ($this->objects as $key => $object) {
$lastname = $object->getValue('lastname');
if (!$lastname) {
$lastname = Turba::guessLastname($object->getValue('name'));
}
$object->setValue('lastname', $lastname);
$sorted_objects[$key] = $object;
}
$this->_usortCriteria = $sort;
// Set the comparison type based on the type of attribute we're
// sorting by.
$this->_usortType = 'text';
if (isset($attributes[$sort])) {
if (!empty($attributes[$sort]['cmptype'])) {
$this->_usortType = $attributes[$sort]['cmptype'];
} elseif ($attributes[$sort]['type'] == 'int' ||
$attributes[$sort]['type'] == 'intlist' ||
$attributes[$sort]['type'] == 'number') {
$this->_usortType = 'int';
}
}
usort($sorted_objects, array($this, 'cmp'));
if ($dir == 1) {
$this->objects = array_reverse($sorted_objects);
} else {
$this->objects = $sorted_objects;
}
}
/**
* Usort helper function.
*
* Compares two Turba_Objects based on the member variable
* $_usortCriteria, taking care to sort numerically if it is an integer
* field.
*
* @param Turba_Object $a The first Turba_Object to compare.
* @param Turba_Object $b The second Turba_Object to compare.
*
* @return integer Comparison of the two field values.
*/
function cmp($a, $b)
{
switch ($this->_usortType) {
case 'int':
return ($a->getValue($this->_usortCriteria) > $b->getValue($this->_usortCriteria)) ? 1 : -1;
break;
case 'text':
default:
$acmp = String::lower($a->getValue($this->_usortCriteria), true);
$bcmp = String::lower($b->getValue($this->_usortCriteria), true);
// Use strcoll for locale-safe comparisons.
return strcoll($acmp, $bcmp);
}
}
}
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