<?php
/*
$Id$

  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
  Copyright (C) 2003  Roland Gruber, Leonhard Walchshäusl

  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 detaexils.

  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

*/

include_once ("../../lib/config.inc");
include_once("../../lib/ldap.inc");

// used to display status messages
include_once ("../../lib/status.inc");

// start session
session_save_path("../../sess");
@session_start();

setlanguage();

// copy HTTP-GET variables to HTTP-POST
$_POST = $_POST + $_GET;

$usr_units = $_SESSION['usr_units'];

// check if button was pressed and if we have to add/delete a user
if ($_POST['new_user'] || $_POST['del_user']){
  // add new user
  if ($_POST['new_user']){
    echo("<meta http-equiv=\"refresh\" content=\"0; URL=../account.php?type=user\">");
    exit;
  }
  // delete user(s)
  if ($_POST['del_user']){
    // search for checkboxes
    $users = array_keys($_POST, "on");
    $userstr = implode(";", $users);
    echo("<meta http-equiv=\"refresh\" content=\"0; URL=../delete.php?type=user&DN='$userstr'\">");
  }
  exit;
}

echo $_SESSION['header'];

echo "<html><head><title>listusers</title>\n";
echo "<link rel=\"stylesheet\" type=\"text/css\" href=\"../../style/layout.css\">\n";
echo "</head><body>\n";
echo "<script src=\"../../lib/functions.js\" type=\"text/javascript\" language=\"javascript\"></script>\n";

// generate attribute-description table
$attr_array = array();	// list of LDAP attributes to show
$desc_array = array();	// list of descriptions for the attributes
$attr_string = $_SESSION["config"]->get_userlistAttributes();
$temp_array = explode(";", $attr_string);
$hash_table = $_SESSION["ldap"]->attributeUserArray();
$page = $_GET["page"];
if (!$page)
     $page = 1;

// take maximum count of user entries shown on one page out of session
if ($_SESSION["config"]->get_MaxListEntries() <= 0)
     $max_pageentrys = 10;	// default setting, if not yet set
     else
     $max_pageentrys = $_SESSION["config"]->get_MaxListEntries();


for ($i = 0; $i < sizeof($temp_array); $i++) {
  // if value is predifined, look up description in hash_table
  if (substr($temp_array[$i],0,1) == "#") {
    $attr = substr($temp_array[$i],1);
    $attr_array[$i] = $attr;
    $desc_array[] = strtoupper($hash_table[$attr]);
  }
  // if not predefined, the attribute is seperated by a ":" from description
  else {
    $attr = explode(":", $temp_array[$i]);
    $attr_array[$i] = $attr[0];
    $desc_array[$i] = strtoupper($attr[1]);
  }
}

$sortattrib = $_GET["sortattrib"];
if (!$sortattrib)
     $sortattrib = strtolower($attr_array[0]);

// check search suffix
if ($_POST['usr_suffix']) $usr_suffix = $_POST['usr_suffix'];  // new suffix selected via combobox
elseif ($_SESSION['usr_suffix']) $usr_suffix = $_SESSION['usr_suffix'];  // old suffix from session
else $usr_suffix = $_SESSION["config"]->get_UserSuffix();  // default suffix


// generate search filter for sort links
$searchfilter = "";
for ($k = 0; $k < sizeof($desc_array); $k++) {
	if ($_POST["filter" . strtolower($attr_array[$k])]) {
		$searchfilter = $searchfilter . "&filter" .
		  strtolower($attr_array[$k]) . "=".
		  $_POST["filter" . strtolower($attr_array[$k])];
	}
}

// configure search filter
// Users have the attribute "*"
	if ($_SESSION['config']->get_samba3() == "yes") {
		// Samba users have the attribute "sambaSamAccount" and end with "$"
		$filter = "(&(objectClass=sambaSamAccount) (!(uid=*$))";
	}
	else {
		// Samba users have the attribute "sambaAccount" and end with "$"
		$filter = "(&(objectClass=sambaAccount) (!(uid=*$))";
	}
for ($k = 0; $k < sizeof($desc_array); $k++) {
  if ($_POST["filter" . strtolower($attr_array[$k])])
    $filter = $filter . "(" . strtolower($attr_array[$k]) . "=" .
      $_POST["filter" . strtolower($attr_array[$k])] . ")";
  else
    $_POST["filter" . strtolower($attr_array[$k])] = "";
}
$filter = $filter . ")";

// read entries only from ldap server if not yet stored in session or if refresh
// button is pressed or if filter is applied
if ($_SESSION["userlist"] && $_GET["norefresh"]) {
	usort ($_SESSION["userlist"], "cmp_array");
	$userinfo = $_SESSION["userlist"];
}
else {
	$attrs = $attr_array;
	$sr = @ldap_search($_SESSION["ldap"]->server(), $usr_suffix, $filter, $attrs);
	if (ldap_errno($_SESSION["ldap"]->server()) == 4) {
		StatusMessage("WARN", _("LDAP sizelimit exceeded, not all entries are shown."), "See README.openldap to solve this problem.");
	}
	if ($sr) {
		$userinfo = ldap_get_entries ($_SESSION["ldap"]->server, $sr);
		ldap_free_result ($sr);
		if ($userinfo["count"] == 0) StatusMessage("WARN", "", _("No Users found!"));
			// delete first array entry which is "count"
			array_shift($userinfo);
			usort ($userinfo, "cmp_array");
			$_SESSION["userlist"] = $userinfo;
		}
	else {
		StatusMessage("ERROR",
			_("LDAP Search failed! Please check your preferences."),
			_("No Users found!"));
	}
}

$user_count = sizeof ($_SESSION["userlist"]);

echo ("<form action=\"listusers.php\" method=\"post\">\n");

// display table only if users exist in LDAP
if ($user_count != 0) {

  // create navigation bar on top of user table
  draw_navigation_bar ($user_count);

  echo ("<br />");
}

  // print user table header
  echo "<table rules=\"all\" class=\"userlist\" width=\"100%\">\n";


  echo "<tr class=\"userlist-head\"><th width=22 height=34></th><th></th>\n";
  // table header
  for ($k = 0; $k < sizeof ($desc_array); $k++) {
    if ($sortattrib == strtolower($attr_array[$k]))
      echo "<th class=\"userlist-activecolumn\">\n";
    else
      echo "<th>\n";
    echo "<a class=\"userlist\" href=\"listusers.php?norefresh=1&amp;sortattrib=" .
      strtolower($attr_array[$k]) . $searchfilter . "\">" .
      $desc_array[$k] . "</a></th>\n";
  }
  echo "</tr>\n";

  echo "<tr class=\"userlist\"><th width=22 height=34></th><th>\n";
  echo "<input type=\"submit\" name=\"apply_filter\" value=\"" . _("Filter") . "\">";
  echo "</th>\n";

  // print input boxes for filters
  for ($k = 0; $k < sizeof ($desc_array); $k++) {
    echo "<th>";
    echo ("<input type=\"text\" size=15 name=\"filter" . strtolower ($attr_array[$k]) .
	  "\" value=\"" . $_POST["filter" . strtolower($attr_array[$k])] . "\">");
    echo "</th>";
  }
  echo "</tr>\n";

if ($user_count != 0) {
  // print user list
  $userinfo = array_slice ($userinfo, ($page - 1) * $max_pageentrys,
			   $max_pageentrys);
  for ($i = 0; $i < sizeof ($userinfo); $i++) { // ignore last entry in array which is "count"
    echo("<tr class=\"userlist\" onMouseOver=\"user_over(this, '" . $userinfo[$i]["dn"] . "')\"" .
	 " onMouseOut=\"user_out(this, '" . $userinfo[$i]["dn"] . "')\"" .
	 " onClick=\"user_click(this, '" . $userinfo[$i]["dn"] . "')\"" .
	 " onDblClick=\"parent.frames[1].location.href='../account.php?type=user&amp;DN=" . $userinfo[$i]["dn"] . "'\">" .
	 " <td height=22><input onClick=\"user_click(this, '" . $userinfo[$i]["dn"] . "')\" type=\"checkbox\" name=\"" . $userinfo[$i]["dn"] . "\"></td>" .
	 " <td align='center'><a href=\"../account.php?type=user&amp;DN='" . $userinfo[$i]["dn"] . "'\">" . _("Edit") . "</a></td>\n");
    for ($k = 0; $k < sizeof($attr_array); $k++) {
      echo ("<td>\n");
      // print all attribute entries seperated by "; "
      if (sizeof($userinfo[$i][strtolower($attr_array[$k])]) > 0) {
	// delete first array entry which is "count"
	if (is_array($userinfo[$i][strtolower($attr_array[$k])])) {
		array_shift($userinfo[$i][strtolower($attr_array[$k])]);
		echo implode("; ", $userinfo[$i][strtolower($attr_array[$k])]);
	}
	else echo $userinfo[$i][strtolower($attr_array[$k])];
      }
    }
    echo ("</td>");
  }
  echo("</tr>\n");
}
echo ("</table>");

echo ("<br />");
if ($user_count != 0) {
  draw_navigation_bar ($user_count);
  echo ("<br />");
}

if (! $_GET['norefresh']) {
	// generate list of possible suffixes
	$usr_units = $_SESSION['ldap']->search_units($_SESSION["config"]->get_UserSuffix());
}

echo ("<p align=\"left\">\n");
echo ("<input type=\"submit\" name=\"new_user\" value=\"" . _("New User") . "\">\n");
if ($user_count != 0) echo ("<input type=\"submit\" name=\"del_user\" value=\"" . _("Delete User(s)") . "\">\n");
// print combobox with possible sub-DNs
if (sizeof($usr_units) > 1) {
echo ("&nbsp;&nbsp;&nbsp;&nbsp;<b>" . _("Suffix") . ": </b>");
echo ("<select size=1 name=\"usr_suffix\">\n");
for ($i = 0; $i < sizeof($usr_units); $i++) {
	if ($usr_suffix == $usr_units[$i]) echo ("<option selected>" . $usr_units[$i] . "</option>\n");
	else echo("<option>" . $usr_units[$i] . "</option>\n");
}
echo ("</select>\n");
echo ("<input type=\"submit\" name=\"refresh\" value=\"" . _("Change Suffix") . "\">");
}

echo ("</p>\n");
echo ("</form>\n");
echo "</body></html>\n";

/**
 * @brief draws a navigation bar to switch between pages
 * 
 *
 * @return void
 */
function draw_navigation_bar ($user_count) {
  global $max_pageentrys;
  global $page;
  global $sortattrib;
  global $searchfilter;

  echo ("<table class=\"userlist-navbar\" width=\"100%\" border=\"0\"\n");
  echo ("<tr>");
  echo ("<td class=\"userlist-navbar\"><input type=\"submit\" name=\"refresh\" value=\"" . _("Refresh") . "\">&nbsp;&nbsp;");
  if ($page != 1)
    echo ("<a class=\"userlist\" href=\"listusers.php?norefresh=1&amp;page=" .
	  ($page - 1) . "&amp;sortattrib=" . $sortattrib .
	  $searchfilter . "\">&lt;=</a>");
  else
    echo ("&lt;=");
  echo ("&nbsp;");

  if ($page < ($user_count / $max_pageentrys))
    echo ("<a class=\"userlist\" href=\"listusers.php?norefresh=1&amp;page=" .
	  ($page + 1) . "&amp;sortattrib=" . $sortattrib . $searchfilter . "\">=&gt;</a>");
  else
    echo ("=&gt;");
  echo ("</td>");
  echo ("<td class=\"userlist-navbartext\">");
  echo "&nbsp;" . $user_count . " " .  _("User(s) found");
  echo ("</td>");


  echo ("<td class=\"userlist-activepage\" align=\"right\">");
  for ($i = 0; $i < ($user_count / $max_pageentrys); $i++) {
    if ($i == $page - 1)
      echo ("&nbsp;" . ($i + 1));
    else
      echo ("&nbsp;<a class=\"userlist\" href=\"listusers.php?norefresh=1&amp;page=" .
	    ($i + 1) . 
	    "&amp;sortattrib=" . $sortattrib . $searchfilter .
	    "\">" . ($i + 1) . "</a>");
  }
  echo ("</td></tr></table>");
}


// compare function used for usort-method
// rows are sorted with the first attribute entry of the sort column
// if objects have attributes with multiple values the others are ignored
function cmp_array($a, $b) {
  // sortattrib specifies the sort column
  global $sortattrib;
  global $attr_array;
  // sort by first attribute with name $sortattrib
	if (!$sortattrib) $sortattrib = strtolower($attr_array[0]);
	if ($a[$sortattrib][0] == $b[$sortattrib][0]) return 0;
	else if ($a[$sortattrib][0] == max($a[$sortattrib][0], $b[$sortattrib][0])) return 1;
	else return -1;
}

// save variables to session
$_SESSION['usr_units'] = $usr_units;
$_SESSION['usr_suffix'] = $usr_suffix;

?>