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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
/**
* Search.php
*
* PHP version 4, 5
*
* @category Net
* @package Net_LDAP
* @author Tarjej Huse <tarjei@bergfald.no>
* @author Jan Wagner <wagner@netsols.de>
* @author Del <del@babel.com.au>
* @author Benedikt Hallinger <beni@php.net>
* @copyright 2003-2007 Tarjej Huse, Jan Wagner, Del Elson, Benedikt Hallinger
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @version CVS: $Id: Search.php,v 1.32 2008/10/26 15:31:06 clockwerx Exp $
* @link http://pear.php.net/package/Net_LDAP/
*/
require_once 'PEAR.php';
/**
* Result set of an LDAP search
*
* @category Net
* @package Net_LDAP
* @author Tarjej Huse <tarjei@bergfald.no>
* @author Benedikt Hallinger <beni@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL
* @link http://pear.php.net/package/Net_LDAP/
*/
class Net_LDAP_Search extends PEAR
{
/**
* Search result identifier
*
* @access private
* @var resource
*/
var $_search;
/**
* LDAP resource link
*
* @access private
* @var resource
*/
var $_link;
/**
* Net_LDAP object
*
* A reference of the Net_LDAP object for passing to Net_LDAP_Entry
*
* @access private
* @var object Net_LDAP
*/
var $_ldap;
/**
* Result entry identifier
*
* @access private
* @var resource
*/
var $_entry = null;
/**
* The errorcode the search got
*
* Some errorcodes might be of interest, but might not be best handled as errors.
* examples: 4 - LDAP_SIZELIMIT_EXCEEDED - indicates a huge search.
* Incomplete results are returned. If you just want to check if there's anything in the search.
* than this is a point to handle.
* 32 - no such object - search here returns a count of 0.
*
* @access private
* @var int
*/
var $_errorCode = 0; // if not set - sucess!
/**
* What attributes we searched for
*
* The $attributes array contains the names of the searched attributes and gets
* passed from $Net_LDAP->search() so the Net_LDAP_Search object can tell
* what attributes was searched for ({@link _searchedAttrs())
*
* This variable gets set from the constructor and returned
* from {@link _searchedAttrs()}
*
* @access private
* @var array
*/
var $_searchedAttrs = array();
/**
* Cache variable for storing entries fetched internally
*
* This currently is only used by {@link pop_entry()}
*
* @access private
* @var array
*/
var $_entry_cache = false;
/**
* Constructor
*
* @param resource &$search Search result identifier
* @param Net_LDAP|resource &$ldap Net_LDAP object or just a LDAP-Link resource
* @param array $attributes (optional) Array with searched attribute names. (see {@link $_searchedAttrs})
*
* @access protected
*/
function Net_LDAP_Search(&$search, &$ldap, $attributes = array())
{
$this->PEAR('Net_LDAP_Error');
$this->setSearch($search);
if (is_a($ldap, 'Net_LDAP')) {
$this->_ldap =& $ldap;
$this->setLink($this->_ldap->getLink());
} else {
$this->setLink($ldap);
}
$this->_errorCode = @ldap_errno($this->_link);
if (is_array($attributes) && !empty($attributes)) {
$this->_searchedAttrs = $attributes;
}
}
/**
* Returns an array of entry objects
*
* @return array Array of entry objects.
*/
function entries()
{
$entries = array();
while ($entry = $this->shiftEntry()) {
$entries[] = $entry;
}
return $entries;
}
/**
* Get the next entry in the searchresult.
*
* This will return a valid Net_LDAP_Entry object or false, so
* you can use this method to easily iterate over the entries inside
* a while loop.
*
* @return Net_LDAP_Entry|false Reference to Net_LDAP_Entry object or false
*/
function &shiftEntry()
{
if ($this->count() == 0 ) {
$false = false;
return $false;
}
if (is_null($this->_entry)) {
$this->_entry = @ldap_first_entry($this->_link, $this->_search);
$entry = new Net_LDAP_Entry($this->_ldap, $this->_entry);
} else {
if (!$this->_entry = @ldap_next_entry($this->_link, $this->_entry)) {
$false = false;
return $false;
}
$entry = new Net_LDAP_Entry($this->_ldap, $this->_entry);
}
return $entry;
}
/**
* Alias function of shiftEntry() for perl-ldap interface
*
* @see shiftEntry()
* @return Net_LDAP_Entry|false Reference to Net_LDAP_Entry object or false
*/
function shift_entry()
{
$args = func_get_args();
return call_user_func_array(array( &$this, 'shiftEntry' ), $args);
}
/**
* Retrieve the next entry in the searchresult, but starting from last entry
*
* This is the opposite to {@link shiftEntry()} and is also very useful
* to be used inside a while loop.
*
* @return Net_LDAP_Entry|false
*/
function popEntry()
{
if (false === $this->_entry_cache) {
// fetch entries into cache if not done so far
$this->_entry_cache = $this->entries();
}
$return = array_pop($this->_entry_cache);
return (null === $return)? false : $return;
}
/**
* Alias function of popEntry() for perl-ldap interface
*
* @see popEntry()
* @return Net_LDAP_Entry|false
*/
function pop_entry()
{
$args = func_get_args();
return call_user_func_array(array( &$this, 'popEntry' ), $args);
}
/**
* Return entries sorted as array
*
* This returns a array with sorted entries and the values.
* Sorting is done with PHPs {@link array_multisort()}.
* This method relies on {@link as_struct()} to fetch the raw data of the entries.
*
* Please note that attribute names are case sensitive!
*
* Usage example:
* <code>
* // to sort entries first by location, then by surename, but descending:
* $entries = $search->sorted_as_struct(array('locality','sn'), SORT_DESC);
* </code>
*
* @param array $attrs Array of attribute names to sort; order from left to right.
* @param int $order Ordering direction, either constant SORT_ASC or SORT_DESC
*
* @return array|Net_LDAP_Error Array with sorted entries or error
*/
function sorted_as_struct($attrs = array('cn'), $order = SORT_ASC)
{
/*
* Old Code, suitable and fast for single valued sorting
* This code should be used if we know that single valued sorting is desired,
* but we need some method to get that knowledge...
*/
/*
$attrs = array_reverse($attrs);
foreach ($attrs as $attribute) {
if (!ldap_sort($this->_link, $this->_search, $attribute)){
$this->raiseError("Sorting failed for Attribute " . $attribute);
}
}
$results = ldap_get_entries($this->_link, $this->_search);
unset($results['count']); //for tidier output
if ($order) {
return array_reverse($results);
} else {
return $results;
}*/
/*
* New code: complete "client side" sorting
*/
// first some parameterchecks
if (!is_array($attrs)) {
return PEAR::raiseError("Sorting failed: Parameterlist must be an array!");
}
if ($order != SORT_ASC && $order != SORT_DESC) {
return PEAR::raiseError("Sorting failed: sorting direction not understood! (neither constant SORT_ASC nor SORT_DESC)");
}
// fetch the entries data
$entries = $this->as_struct();
// now sort each entries attribute values
// this is neccessary because later we can only sort by one value,
// so we need the highest or lowest attribute now, depending on the
// selected ordering for that specific attribute
foreach ($entries as $dn => $entry) {
foreach ($entry as $attr_name => $attr_values) {
sort($entries[$dn][$attr_name]);
if ($order == SORT_DESC) {
array_reverse($entries[$dn][$attr_name]);
}
}
}
// reformat entrys array for later use with array_multisort()
$to_sort = array(); // <- will be a numeric array similar to ldap_get_entries
foreach ($entries as $dn => $entry_attr) {
$row = array();
$row['dn'] = $dn;
foreach ($entry_attr as $attr_name => $attr_values) {
$row[$attr_name] = $attr_values;
}
$to_sort[] = $row;
}
// Build columns for array_multisort()
// each requested attribute is one row
$columns = array();
foreach ($attrs as $attr_name) {
foreach ($to_sort as $key => $row) {
$columns[$attr_name][$key] =& $to_sort[$key][$attr_name][0];
}
}
// sort the colums with array_multisort, if there is something
// to sort and if we have requested sort columns
if (!empty($to_sort) && !empty($columns)) {
$sort_params = '';
foreach ($attrs as $attr_name) {
$sort_params .= '$columns[\''.$attr_name.'\'], '.$order.', ';
}
eval("array_multisort($sort_params \$to_sort);"); // perform sorting
}
return $to_sort;
}
/**
* Return entries sorted as objects
*
* This returns a array with sorted Net_LDAP_Entry objects.
* The sorting is actually done with {@link sorted_as_struct()}.
*
* Please note that attribute names are case sensitive!
*
* Usage example:
* <code>
* // to sort entries first by location, then by surename, but descending:
* $entries = $search->sorted(array('locality','sn'), SORT_DESC);
* </code>
*
* @param array $attrs Array of sort attributes to sort; order from left to right.
* @param int $order Ordering direction, either constant SORT_ASC or SORT_DESC
*
* @return array|Net_LDAP_Error Array with sorted Net_LDAP_Entries or error
*/
function sorted($attrs = array('cn'), $order = SORT_ASC)
{
$return = array();
$sorted = $this->sorted_as_struct($attrs, $order);
if (PEAR::isError($sorted)) {
return $sorted;
}
foreach ($sorted as $key => $row) {
$entry = $this->_ldap->getEntry($row['dn'], $this->_searchedAttrs());
if (!PEAR::isError($entry)) {
array_push($return, $entry);
} else {
return $entry;
}
}
return $return;
}
/**
* Return entries as array
*
* This method returns the entries and the selected attributes values as
* array.
* The first array level contains all found entries where the keys are the
* DNs of the entries. The second level arrays contian the entries attributes
* such that the keys is the lowercased name of the attribute and the values
* are stored in another indexed array. Note that the attribute values are stored
* in an array even if there is no or just one value.
*
* The array has the following structure:
* <code>
* $return = array(
* 'cn=foo,dc=example,dc=com' => array(
* 'sn' => array('foo'),
* 'multival' => array('val1', 'val2', 'valN')
* )
* 'cn=bar,dc=example,dc=com' => array(
* 'sn' => array('bar'),
* 'multival' => array('val1', 'valN')
* )
* )
* </code>
*
* @return array associative result array as described above
*/
function as_struct()
{
$return = array();
$entries = $this->entries();
foreach ($entries as $entry) {
$attrs = array();
$entry_attributes = $entry->attributes();
foreach ($entry_attributes as $attr_name) {
$attr_values = $entry->getValue($attr_name, 'all');
if (!is_array($attr_values)) {
$attr_values = array($attr_values);
}
$attrs[$attr_name] = $attr_values;
}
$return[$entry->dn()] = $attrs;
}
return $return;
}
/**
* Set the search objects resource link
*
* @param resource &$search Search result identifier
*
* @access public
* @return void
*/
function setSearch(&$search)
{
$this->_search = $search;
}
/**
* Set the ldap ressource link
*
* @param resource &$link Link identifier
*
* @access public
* @return void
*/
function setLink(&$link)
{
$this->_link = $link;
}
/**
* Returns the number of entries in the searchresult
*
* @return int Number of entries in search.
*/
function count()
{
// this catches the situation where OL returned errno 32 = no such object!
if (!$this->_search) {
return 0;
}
return @ldap_count_entries($this->_link, $this->_search);
}
/**
* Get the errorcode the object got in its search.
*
* @return int The ldap error number.
*/
function getErrorCode()
{
return $this->_errorCode;
}
/**
* Destructor
*
* @access protected
*/
function _Net_LDAP_Search()
{
@ldap_free_result($this->_search);
}
/**
* Closes search result
*
* @return void
*/
function done()
{
$this->_Net_LDAP_Search();
}
/**
* Return the attribute names this search selected
*
* @return array
* @see $_searchedAttrs
* @access private
*/
function _searchedAttrs()
{
return $this->_searchedAttrs;
}
/**
* Tells if this search exceeds a sizelimit
*
* @return boolean
*/
function sizeLimitExceeded()
{
return ($this->getErrorCode() == 4);
}
}
?>
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