lib/plugins/usermanager/admin.php

   1 <?php
   2 /*
   3  *  User Manager
   4  *
   5  *  Dokuwiki Admin Plugin
   6  *
   7  *  This version of the user manager has been modified to only work with
   8  *  objectified version of auth system
   9  *
  10  *  @author  neolao <neolao@neolao.com>
  11  *  @author  Chris Smith <chris@jalakai.co.uk>
  12  */
  13 // must be run within Dokuwiki
  14 if(!defined('DOKU_INC')) die();
  15
  16 if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
  17 if(!defined('DOKU_PLUGIN_IMAGES')) define('DOKU_PLUGIN_IMAGES',DOKU_BASE.'lib/plugins/usermanager/images/');
  18 require_once(DOKU_PLUGIN.'admin.php');
  19
  20 /**
  21  * All DokuWiki plugins to extend the admin function
  22  * need to inherit from this class
  23  */
  24 class admin_plugin_usermanager extends DokuWiki_Admin_Plugin {
  25
  26     var $_auth = null;        // auth object
  27     var $_user_total = 0;     // number of registered users
  28     var $_filter = array();   // user selection filter(s)
  29     var $_start = 0;          // index of first user to be displayed
  30     var $_last = 0;           // index of the last user to be displayed
  31     var $_pagesize = 20;      // number of users to list on one page
  32     var $_edit_user = '';     // set to user selected for editing
  33     var $_edit_userdata = array();
  34     var $_disabled = '';      // if disabled set to explanatory string
  35
  36     /**
  37      * Constructor
  38      */
  39     function admin_plugin_usermanager(){
  40         global $auth;
  41
  42         $this->setupLocale();
  43
  44         if (!isset($auth)) {
  45           $this->disabled = $this->lang['noauth'];
  46         } else if (!$auth->canDo('getUsers')) {
  47           $this->disabled = $this->lang['nosupport'];
  48         } else {
  49
  50           // we're good to go
  51           $this->_auth = & $auth;
  52
  53         }
  54     }
  55
  56     /**
  57      * return some info
  58      */
  59     function getInfo(){
  60
  61         return array(
  62             'author' => 'Chris Smith',
  63             'email'  => 'chris@jalakai.co.uk',
  64             'date'   => '2008-09-17',
  65             'name'   => 'User Manager',
  66             'desc'   => 'Manage users '.$this->disabled,
  67             'url'    => 'http://dokuwiki.org/plugin:usermanager',
  68         );
  69     }
  70      /**
  71      * return prompt for admin menu
  72      */
  73     function getMenuText($language) {
  74
  75         if (!is_null($this->_auth))
  76           return parent::getMenuText($language);
  77
  78         return $this->getLang('menu').' '.$this->disabled;
  79     }
  80
  81     /**
  82      * return sort order for position in admin menu
  83      */
  84     function getMenuSort() {
  85         return 2;
  86     }
  87
  88     /**
  89      * handle user request
  90      */
  91     function handle() {
  92         global $ID;
  93
  94         if (is_null($this->_auth)) return false;
  95
  96         // extract the command and any specific parameters
  97         // submit button name is of the form - fn[cmd][param(s)]
  98         $fn   = $_REQUEST['fn'];
  99
 100         if (is_array($fn)) {
 101             $cmd = key($fn);
 102             $param = is_array($fn[$cmd]) ? key($fn[$cmd]) : null;
 103         } else {
 104             $cmd = $fn;
 105             $param = null;
 106         }
 107
 108         if ($cmd != "search") {
 109           if (!empty($_REQUEST['start']))
 110             $this->_start = $_REQUEST['start'];
 111           $this->_filter = $this->_retrieveFilter();
 112         }
 113
 114         switch($cmd){
 115           case "add"    : $this->_addUser(); break;
 116           case "delete" : $this->_deleteUser(); break;
 117           case "modify" : $this->_modifyUser(); break;
 118           case "edit"   : $this->_editUser($param); break;
 119           case "search" : $this->_setFilter($param);
 120                           $this->_start = 0;
 121                           break;
 122         }
 123
 124         $this->_user_total = $this->_auth->canDo('getUserCount') ? $this->_auth->getUserCount($this->_filter) : -1;
 125
 126         // page handling
 127         switch($cmd){
 128           case 'start' : $this->_start = 0; break;
 129           case 'prev'  : $this->_start -= $this->_pagesize; break;
 130           case 'next'  : $this->_start += $this->_pagesize; break;
 131           case 'last'  : $this->_start = $this->_user_total; break;
 132         }
 133         $this->_validatePagination();
 134     }
 135
 136     /**
 137      * output appropriate html
 138      */
 139     function html() {
 140         global $ID;
 141
 142         if(is_null($this->_auth)) {
 143             print $this->lang['badauth'];
 144             return false;
 145         }
 146
 147         $user_list = $this->_auth->retrieveUsers($this->_start, $this->_pagesize, $this->_filter);
 148         $users = array_keys($user_list);
 149
 150         $page_buttons = $this->_pagination();
 151         $delete_disable = $this->_auth->canDo('delUser') ? '' : 'disabled="disabled"';
 152
 153         $editable = $this->_auth->canDo('UserMod');
 154
 155         print $this->locale_xhtml('intro');
 156         print $this->locale_xhtml('list');
 157
 158         ptln("<div id=\"user__manager\">");
 159         ptln("<div class=\"level2\">");
 160
 161         if ($this->_user_total > 0) {
 162           ptln("<p>".sprintf($this->lang['summary'],$this->_start+1,$this->_last,$this->_user_total,$this->_auth->getUserCount())."</p>");
 163         } else {
 164           ptln("<p>".sprintf($this->lang['nonefound'],$this->_auth->getUserCount())."</p>");
 165         }
 166         ptln("<form action=\"".wl($ID)."\" method=\"post\">");
 167         formSecurityToken();
 168         ptln("  <table class=\"inline\">");
 169         ptln("    <thead>");
 170         ptln("      <tr>");
 171         ptln("        <th>&nbsp;</th><th>".$this->lang["user_id"]."</th><th>".$this->lang["user_name"]."</th><th>".$this->lang["user_mail"]."</th><th>".$this->lang["user_groups"]."</th>");
 172         ptln("      </tr>");
 173
 174         ptln("      <tr>");
 175         ptln("        <td class=\"rightalign\"><input type=\"image\" src=\"".DOKU_PLUGIN_IMAGES."search.png\" name=\"fn[search][new]\" title=\"".$this->lang['search_prompt']."\" alt=\"".$this->lang['search']."\" class=\"button\" /></td>");
 176         ptln("        <td><input type=\"text\" name=\"userid\" class=\"edit\" value=\"".$this->_htmlFilter('user')."\" /></td>");
 177         ptln("        <td><input type=\"text\" name=\"username\" class=\"edit\" value=\"".$this->_htmlFilter('name')."\" /></td>");
 178         ptln("        <td><input type=\"text\" name=\"usermail\" class=\"edit\" value=\"".$this->_htmlFilter('mail')."\" /></td>");
 179         ptln("        <td><input type=\"text\" name=\"usergroups\" class=\"edit\" value=\"".$this->_htmlFilter('grps')."\" /></td>");
 180         ptln("      </tr>");
 181         ptln("    </thead>");
 182
 183         if ($this->_user_total) {
 184           ptln("    <tbody>");
 185           foreach ($user_list as $user => $userinfo) {
 186             extract($userinfo);
 187             $groups = join(', ',$grps);
 188             ptln("    <tr class=\"user_info\">");
 189             ptln("      <td class=\"centeralign\"><input type=\"checkbox\" name=\"delete[".$user."]\" ".$delete_disable." /></td>");
 190             if ($editable) {
 191               ptln("    <td><a href=\"".wl($ID,array('fn[edit]['.hsc($user).']' => 1,
 192                                                      'do' => 'admin',
 193                                                      'page' => 'usermanager',
 194                                                      'sectok' => getSecurityToken())).
 195                    "\" title=\"".$this->lang['edit_prompt']."\">".hsc($user)."</a></td>");
 196             } else {
 197               ptln("    <td>".hsc($user)."</td>");
 198             }
 199             ptln("      <td>".hsc($name)."</td><td>".hsc($mail)."</td><td>".hsc($groups)."</td>");
 200             ptln("    </tr>");
 201           }
 202           ptln("    </tbody>");
 203         }
 204
 205         ptln("    <tbody>");
 206         ptln("      <tr><td colspan=\"5\" class=\"centeralign\">");
 207         ptln("        <span class=\"medialeft\">");
 208         ptln("          <input type=\"submit\" name=\"fn[delete]\" ".$delete_disable." class=\"button\" value=\"".$this->lang['delete_selected']."\" id=\"usrmgr__del\" />");
 209         ptln("        </span>");
 210         ptln("        <span class=\"mediaright\">");
 211         ptln("          <input type=\"submit\" name=\"fn[start]\" ".$page_buttons['start']." class=\"button\" value=\"".$this->lang['start']."\" />");
 212         ptln("          <input type=\"submit\" name=\"fn[prev]\" ".$page_buttons['prev']." class=\"button\" value=\"".$this->lang['prev']."\" />");
 213         ptln("          <input type=\"submit\" name=\"fn[next]\" ".$page_buttons['next']." class=\"button\" value=\"".$this->lang['next']."\" />");
 214         ptln("          <input type=\"submit\" name=\"fn[last]\" ".$page_buttons['last']." class=\"button\" value=\"".$this->lang['last']."\" />");
 215         ptln("        </span>");
 216         ptln("        <input type=\"submit\" name=\"fn[search][clear]\" class=\"button\" value=\"".$this->lang['clear']."\" />");
 217         ptln("        <input type=\"hidden\" name=\"do\"    value=\"admin\" />");
 218         ptln("        <input type=\"hidden\" name=\"page\"  value=\"usermanager\" />");
 219
 220         $this->_htmlFilterSettings(2);
 221
 222         ptln("      </td></tr>");
 223         ptln("    </tbody>");
 224         ptln("  </table>");
 225
 226         ptln("</form>");
 227         ptln("</div>");
 228
 229         $style = $this->_edit_user ? " class=\"edit_user\"" : "";
 230
 231         if ($this->_auth->canDo('addUser')) {
 232           ptln("<div".$style.">");
 233           print $this->locale_xhtml('add');
 234           ptln("  <div class=\"level2\">");
 235
 236           $this->_htmlUserForm('add',null,array(),4);
 237
 238           ptln("  </div>");
 239           ptln("</div>");
 240         }
 241
 242         if($this->_edit_user  && $this->_auth->canDo('UserMod')){
 243           ptln("<div".$style." id=\"scroll__here\">");
 244           print $this->locale_xhtml('edit');
 245           ptln("  <div class=\"level2\">");
 246
 247           $this->_htmlUserForm('modify',$this->_edit_user,$this->_edit_userdata,4);
 248
 249           ptln("  </div>");
 250           ptln("</div>");
 251         }
 252         ptln("</div>");
 253     }
 254
 255
 256     /**
 257      * @todo disable fields which the backend can't change
 258      */
 259     function _htmlUserForm($cmd,$user='',$userdata=array(),$indent=0) {
 260         global $conf;
 261         global $ID;
 262
 263         $name = $mail = $groups = '';
 264         $notes = array();
 265
 266         if ($user) {
 267           extract($userdata);
 268           if (!empty($grps)) $groups = join(',',$grps);
 269         } else {
 270           $notes[] = sprintf($this->lang['note_group'],$conf['defaultgroup']);
 271         }
 272
 273         ptln("<form action=\"".wl($ID)."\" method=\"post\">",$indent);
 274         formSecurityToken();
 275         ptln("  <table class=\"inline\">",$indent);
 276         ptln("    <thead>",$indent);
 277         ptln("      <tr><th>".$this->lang["field"]."</th><th>".$this->lang["value"]."</th></tr>",$indent);
 278         ptln("    </thead>",$indent);
 279         ptln("    <tbody>",$indent);
 280
 281         $this->_htmlInputField($cmd."_userid",    "userid",    $this->lang["user_id"],    $user,  $this->_auth->canDo("modLogin"), $indent+6);
 282         $this->_htmlInputField($cmd."_userpass",  "userpass",  $this->lang["user_pass"],  "",     $this->_auth->canDo("modPass"),  $indent+6);
 283         $this->_htmlInputField($cmd."_username",  "username",  $this->lang["user_name"],  $name,  $this->_auth->canDo("modName"),  $indent+6);
 284         $this->_htmlInputField($cmd."_usermail",  "usermail",  $this->lang["user_mail"],  $mail,  $this->_auth->canDo("modMail"),  $indent+6);
 285         $this->_htmlInputField($cmd."_usergroups","usergroups",$this->lang["user_groups"],$groups,$this->_auth->canDo("modGroups"),$indent+6);
 286
 287         if ($this->_auth->canDo("modPass")) {
 288           $notes[] = $this->lang['note_pass'];
 289           if ($user) {
 290             $notes[] = $this->lang['note_notify'];
 291           }
 292
 293           ptln("<tr><td><label for=\"".$cmd."_usernotify\" >".$this->lang["user_notify"].": </label></td><td><input type=\"checkbox\" id=\"".$cmd."_usernotify\" name=\"usernotify\" value=\"1\" /></td></tr>", $indent);
 294         }
 295
 296         ptln("    </tbody>",$indent);
 297         ptln("    <tbody>",$indent);
 298         ptln("      <tr>",$indent);
 299         ptln("        <td colspan=\"2\">",$indent);
 300         ptln("          <input type=\"hidden\" name=\"do\"    value=\"admin\" />",$indent);
 301         ptln("          <input type=\"hidden\" name=\"page\"  value=\"usermanager\" />",$indent);
 302
 303         // save current $user, we need this to access details if the name is changed
 304         if ($user)
 305           ptln("          <input type=\"hidden\" name=\"userid_old\"  value=\"".$user."\" />",$indent);
 306
 307         $this->_htmlFilterSettings($indent+10);
 308
 309         ptln("          <input type=\"submit\" name=\"fn[".$cmd."]\" class=\"button\" value=\"".$this->lang[$cmd]."\" />",$indent);
 310         ptln("        </td>",$indent);
 311         ptln("      </tr>",$indent);
 312         ptln("    </tbody>",$indent);
 313         ptln("  </table>",$indent);
 314
 315         foreach ($notes as $note)
 316           ptln("<div class=\"fn\">".$note."</div>",$indent);
 317
 318         ptln("</form>",$indent);
 319     }
 320
 321     function _htmlInputField($id, $name, $label, $value, $cando, $indent=0) {
 322         $class = $cando ? '' : ' class="disabled"';
 323         $disabled = $cando ? '' : ' disabled="disabled"';
 324         echo str_pad('',$indent);
 325
 326         $fieldtype = ($name == "userpass") ? 'password'  : 'text';
 327
 328         echo "<tr $class>";
 329         echo "<td><label for=\"$id\" >$label: </label></td>";
 330         echo "<td>";
 331         if($cando){
 332             echo "<input type=\"$fieldtype\" id=\"$id\" name=\"$name\" value=\"$value\" class=\"edit\" />";
 333         }else{
 334             echo "<input type=\"hidden\" name=\"$name\" value=\"$value\" />";
 335             echo "<input type=\"$fieldtype\" id=\"$id\" name=\"$name\" value=\"$value\" class=\"edit disabled\" disabled=\"disabled\" />";
 336         }
 337         echo "</td>";
 338         echo "</tr>";
 339     }
 340
 341     function _htmlFilter($key) {
 342         if (empty($this->_filter)) return '';
 343         return (isset($this->_filter[$key]) ? hsc($this->_filter[$key]) : '');
 344     }
 345
 346     function _htmlFilterSettings($indent=0) {
 347
 348         ptln("<input type=\"hidden\" name=\"start\" value=\"".$this->_start."\" />",$indent);
 349
 350         foreach ($this->_filter as $key => $filter) {
 351           ptln("<input type=\"hidden\" name=\"filter[".$key."]\" value=\"".hsc($filter)."\" />",$indent);
 352         }
 353     }
 354
 355     function _addUser(){
 356         if (!checkSecurityToken()) return false;
 357         if (!$this->_auth->canDo('addUser')) return false;
 358
 359         list($user,$pass,$name,$mail,$grps) = $this->_retrieveUser();
 360         if (empty($user)) return false;
 361
 362         if ($this->_auth->canDo('modPass')){
 363           if (empty($pass)){
 364             if(!empty($_REQUEST['usernotify'])){
 365               $pass = auth_pwgen();
 366             } else {
 367               msg($this->lang['add_fail'], -1);
 368               return false;
 369             }
 370           }
 371         } else {
 372           if (!empty($pass)){
 373             msg($this->lang['add_fail'], -1);
 374             return false;
 375           }
 376         }
 377
 378         if ($this->_auth->canDo('modName')){
 379           if (empty($name)){
 380             msg($this->lang['add_fail'], -1);
 381             return false;
 382           }
 383         } else {
 384           if (!empty($name)){
 385             return false;
 386           }
 387         }
 388
 389         if ($this->_auth->canDo('modMail')){
 390           if (empty($mail)){
 391             msg($this->lang['add_fail'], -1);
 392             return false;
 393           }
 394         } else {
 395           if (!empty($mail)){
 396                 return false;
 397           }
 398         }
 399
 400         if ($ok = $this->_auth->triggerUserMod('create', array($user,$pass,$name,$mail,$grps))) {
 401
 402           msg($this->lang['add_ok'], 1);
 403
 404           if (!empty($_REQUEST['usernotify']) && $pass) {
 405             $this->_notifyUser($user,$pass);
 406           }
 407         } else {
 408           msg($this->lang['add_fail'], -1);
 409         }
 410
 411         return $ok;
 412     }
 413
 414     /**
 415      * Delete user
 416      */
 417     function _deleteUser(){
 418         global $conf;
 419
 420         if (!checkSecurityToken()) return false;
 421         if (!$this->_auth->canDo('delUser')) return false;
 422
 423         $selected = $_REQUEST['delete'];
 424         if (!is_array($selected) || empty($selected)) return false;
 425         $selected = array_keys($selected);
 426
 427         if(in_array($_SERVER['REMOTE_USER'], $selected)) {
 428             msg("You can't delete yourself!", -1);
 429             return false;
 430         }
 431
 432         $count = $this->_auth->triggerUserMod('delete', array($selected));
 433         if ($count == count($selected)) {
 434           $text = str_replace('%d', $count, $this->lang['delete_ok']);
 435           msg("$text.", 1);
 436         } else {
 437           $part1 = str_replace('%d', $count, $this->lang['delete_ok']);
 438           $part2 = str_replace('%d', (count($selected)-$count), $this->lang['delete_fail']);
 439           msg("$part1, $part2",-1);
 440         }
 441
 442         // invalidate all sessions
 443         io_saveFile($conf['cachedir'].'/sessionpurge',time());
 444
 445         return true;
 446     }
 447
 448     /**
 449      * Edit user (a user has been selected for editing)
 450      */
 451     function _editUser($param) {
 452         if (!checkSecurityToken()) return false;
 453         if (!$this->_auth->canDo('UserMod')) return false;
 454
 455         $user = cleanID(preg_replace('/.*:/','',$param));
 456         $userdata = $this->_auth->getUserData($user);
 457
 458         // no user found?
 459         if (!$userdata) {
 460           msg($this->lang['edit_usermissing'],-1);
 461           return false;
 462         }
 463
 464         $this->_edit_user = $user;
 465         $this->_edit_userdata = $userdata;
 466
 467         return true;
 468     }
 469
 470     /**
 471      * Modify user (modified user data has been recieved)
 472      */
 473     function _modifyUser(){
 474         global $conf;
 475
 476         if (!checkSecurityToken()) return false;
 477         if (!$this->_auth->canDo('UserMod')) return false;
 478
 479         // get currently valid  user data
 480         $olduser = cleanID(preg_replace('/.*:/','',$_REQUEST['userid_old']));
 481         $oldinfo = $this->_auth->getUserData($olduser);
 482
 483         // get new user data subject to change
 484         list($newuser,$newpass,$newname,$newmail,$newgrps) = $this->_retrieveUser();
 485         if (empty($newuser)) return false;
 486
 487         $changes = array();
 488         if ($newuser != $olduser) {
 489
 490           if (!$this->_auth->canDo('modLogin')) {        // sanity check, shouldn't be possible
 491             msg($this->lang['update_fail'],-1);
 492             return false;
 493           }
 494
 495           // check if $newuser already exists
 496           if ($this->_auth->getUserData($newuser)) {
 497             msg(sprintf($this->lang['update_exists'],$newuser),-1);
 498             $re_edit = true;
 499           } else {
 500             $changes['user'] = $newuser;
 501           }
 502         }
 503
 504         if (!empty($newpass) && $this->_auth->canDo('modPass'))
 505           $changes['pass'] = $newpass;
 506         if (!empty($newname) && $this->_auth->canDo('modName') && $newname != $oldinfo['name'])
 507           $changes['name'] = $newname;
 508         if (!empty($newmail) && $this->_auth->canDo('modMail') && $newmail != $oldinfo['mail'])
 509           $changes['mail'] = $newmail;
 510         if (!empty($newgrps) && $this->_auth->canDo('modGroups') && $newgrps != $oldinfo['grps'])
 511           $changes['grps'] = $newgrps;
 512
 513         if ($ok = $this->_auth->triggerUserMod('modify', array($olduser, $changes))) {
 514           msg($this->lang['update_ok'],1);
 515
 516           if (!empty($_REQUEST['usernotify']) && $newpass) {
 517             $notify = empty($changes['user']) ? $olduser : $newuser;
 518             $this->_notifyUser($notify,$newpass);
 519           }
 520
 521           // invalidate all sessions
 522           io_saveFile($conf['cachedir'].'/sessionpurge',time());
 523
 524         } else {
 525           msg($this->lang['update_fail'],-1);
 526         }
 527
 528         if (!empty($re_edit)) {
 529             $this->_editUser($olduser);
 530         }
 531
 532         return $ok;
 533     }
 534
 535     /**
 536      * send password change notification email
 537      */
 538     function _notifyUser($user, $password) {
 539
 540         if ($sent = auth_sendPassword($user,$password)) {
 541           msg($this->lang['notify_ok'], 1);
 542         } else {
 543           msg($this->lang['notify_fail'], -1);
 544         }
 545
 546         return $sent;
 547     }
 548
 549     /**
 550      * retrieve & clean user data from the form
 551      *
 552      * @return  array(user, password, full name, email, array(groups))
 553      */
 554     function _retrieveUser($clean=true) {
 555
 556         $user[0] = ($clean) ? cleanID(preg_replace('/.*:/','',$_REQUEST['userid'])) : $_REQUEST['userid'];
 557         $user[1] = $_REQUEST['userpass'];
 558         $user[2] = $_REQUEST['username'];
 559         $user[3] = $_REQUEST['usermail'];
 560         $user[4] = preg_split('/\s*,\s*/',$_REQUEST['usergroups'],-1,PREG_SPLIT_NO_EMPTY);
 561
 562         if (empty($user[4]) || (is_array($user[4]) && (count($user[4]) == 1) && (trim($user[4][0]) == ''))) {
 563             $user[4] = null;
 564         }
 565
 566         return $user;
 567     }
 568
 569     function _setFilter($op) {
 570
 571         $this->_filter = array();
 572
 573         if ($op == 'new') {
 574           list($user,$pass,$name,$mail,$grps) = $this->_retrieveUser(false);
 575
 576           if (!empty($user)) $this->_filter['user'] = $user;
 577           if (!empty($name)) $this->_filter['name'] = $name;
 578           if (!empty($mail)) $this->_filter['mail'] = $mail;
 579           if (!empty($grps)) $this->_filter['grps'] = join('|',$grps);
 580         }
 581     }
 582
 583     function _retrieveFilter() {
 584
 585         $t_filter = $_REQUEST['filter'];
 586         if (!is_array($t_filter)) return array();
 587
 588         // messy, but this way we ensure we aren't getting any additional crap from malicious users
 589         $filter = array();
 590
 591         if (isset($t_filter['user'])) $filter['user'] = $t_filter['user'];
 592         if (isset($t_filter['name'])) $filter['name'] = $t_filter['name'];
 593         if (isset($t_filter['mail'])) $filter['mail'] = $t_filter['mail'];
 594         if (isset($t_filter['grps'])) $filter['grps'] = $t_filter['grps'];
 595
 596         return $filter;
 597     }
 598
 599     function _validatePagination() {
 600
 601         if ($this->_start >= $this->_user_total) {
 602           $this->_start = $this->_user_total - $this->_pagesize;
 603         }
 604         if ($this->_start < 0) $this->_start = 0;
 605
 606         $this->_last = min($this->_user_total, $this->_start + $this->_pagesize);
 607     }
 608
 609     /*
 610      *  return an array of strings to enable/disable pagination buttons
 611      */
 612     function _pagination() {
 613
 614         $disabled = 'disabled="disabled"';
 615
 616         $buttons['start'] = $buttons['prev'] = ($this->_start == 0) ? $disabled : '';
 617
 618         if ($this->_user_total == -1) {
 619           $buttons['last'] = $disabled;
 620           $buttons['next'] = '';
 621         } else {
 622           $buttons['last'] = $buttons['next'] = (($this->_start + $this->_pagesize) >= $this->_user_total) ? $disabled : '';
 623         }
 624
 625         return $buttons;
 626     }
 627 }