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/inc/ -> functions_user.php (source)

   1  <?php
   2  /**
   3   * MyBB 1.8
   4   * Copyright 2014 MyBB Group, All Rights Reserved
   5   *
   6   * Website: http://www.mybb.com
   7   * License: http://www.mybb.com/about/license
   8   *
   9   */
  10  
  11  /**
  12   * Checks if a user with uid $uid exists in the database.
  13   *
  14   * @param int $uid The uid to check for.
  15   * @return boolean True when exists, false when not.
  16   */
  17  function user_exists($uid)
  18  {
  19      global $db;
  20  
  21      $query = $db->simple_select("users", "COUNT(*) as user", "uid='".(int)$uid."'", array('limit' => 1));
  22      if($db->fetch_field($query, 'user') == 1)
  23      {
  24          return true;
  25      }
  26      else
  27      {
  28          return false;
  29      }
  30  }
  31  
  32  /**
  33   * Checks if $username already exists in the database.
  34   *
  35   * @param string $username The username for check for.
  36   * @return boolean True when exists, false when not.
  37   */
  38  function username_exists($username)
  39  {
  40      $options = array(
  41          'username_method' => 2
  42      );
  43  
  44      return (bool)get_user_by_username($username, $options);
  45  }
  46  
  47  /**
  48   * Checks a password with a supplied username.
  49   *
  50   * @param string $username The username of the user.
  51   * @param string $password The plain-text password.
  52   * @return boolean|array False when no match, array with user info when match.
  53   */
  54  function validate_password_from_username($username, $password)
  55  {
  56      global $mybb;
  57  
  58      $options = array(
  59          'fields' => '*',
  60          'username_method' => $mybb->settings['username_method'],
  61      );
  62  
  63      $user = get_user_by_username($username, $options);
  64  
  65      if(!$user)
  66      {
  67          return false;
  68      }
  69  
  70      return validate_password_from_uid($user['uid'], $password, $user);
  71  }
  72  
  73  /**
  74   * Checks a password with a supplied uid.
  75   *
  76   * @param int $uid The user id.
  77   * @param string $password The plain-text password.
  78   * @param array $user An optional user data array.
  79   * @return boolean|array False when not valid, user data array when valid.
  80   */
  81  function validate_password_from_uid($uid, $password, $user = array())
  82  {
  83      global $db, $mybb;
  84      if(isset($mybb->user['uid']) && $mybb->user['uid'] == $uid)
  85      {
  86          $user = $mybb->user;
  87      }
  88      if(!$user['password'])
  89      {
  90          $user = get_user($uid);
  91      }
  92  
  93      if(!$user['loginkey'])
  94      {
  95          $user['loginkey'] = generate_loginkey();
  96          $sql_array = array(
  97              "loginkey" => $user['loginkey']
  98          );
  99          $db->update_query("users", $sql_array, "uid = ".$user['uid']);
 100      }
 101      if(verify_user_password($user, $password))
 102      {
 103          return $user;
 104      }
 105      else
 106      {
 107          return false;
 108      }
 109  }
 110  
 111  /**
 112   * Updates a user's password.
 113   *
 114   * @param int $uid The user's id.
 115   * @param string $password The md5()'ed password.
 116   * @param string $salt (Optional) The salt of the user.
 117   * @return array The new password.
 118   * @deprecated deprecated since version 1.8.6 Please use other alternatives.
 119   */
 120  function update_password($uid, $password, $salt="")
 121  {
 122      global $db, $plugins;
 123  
 124      $newpassword = array();
 125  
 126      // If no salt was specified, check in database first, if still doesn't exist, create one
 127      if(!$salt)
 128      {
 129          $query = $db->simple_select("users", "salt", "uid='$uid'");
 130          $user = $db->fetch_array($query);
 131          if($user['salt'])
 132          {
 133              $salt = $user['salt'];
 134          }
 135          else
 136          {
 137              $salt = generate_salt();
 138          }
 139          $newpassword['salt'] = $salt;
 140      }
 141  
 142      // Create new password based on salt
 143      $saltedpw = salt_password($password, $salt);
 144  
 145      // Generate new login key
 146      $loginkey = generate_loginkey();
 147  
 148      // Update password and login key in database
 149      $newpassword['password'] = $saltedpw;
 150      $newpassword['loginkey'] = $loginkey;
 151      $db->update_query("users", $newpassword, "uid='$uid'");
 152  
 153      $plugins->run_hooks("password_changed");
 154  
 155      return $newpassword;
 156  }
 157  
 158  /**
 159   * Salts a password based on a supplied salt.
 160   *
 161   * @param string $password The md5()'ed password.
 162   * @param string $salt The salt.
 163   * @return string The password hash.
 164   * @deprecated deprecated since version 1.8.9 Please use other alternatives.
 165   */
 166  function salt_password($password, $salt)
 167  {
 168      return md5(md5($salt).$password);
 169  }
 170  
 171  /**
 172   * Salts a password based on a supplied salt.
 173   *
 174   * @param string $password The input password.
 175   * @param string $salt (Optional) The salt used by the MyBB algorithm.
 176   * @param string $user (Optional) An array containing password-related data.
 177   * @return array Password-related fields.
 178   */
 179  function create_password($password, $salt = false, $user = false)
 180  {
 181      global $plugins;
 182  
 183      $fields = null;
 184  
 185      $parameters = compact('password', 'salt', 'user', 'fields');
 186  
 187      if(!defined('IN_INSTALL') && !defined('IN_UPGRADE'))
 188      {
 189          $plugins->run_hooks('create_password', $parameters);
 190      }
 191  
 192      if(!is_null($parameters['fields']))
 193      {
 194          $fields = $parameters['fields'];
 195      }
 196      else
 197      {
 198          if(!$salt)
 199          {
 200              $salt = generate_salt();
 201          }
 202  
 203          $hash = md5(md5($salt).md5($password));
 204  
 205          $fields = array(
 206              'salt' => $salt,
 207              'password' => $hash,
 208          );
 209      }
 210  
 211      return $fields;
 212  }
 213  
 214  /**
 215   * Compares user's password data against provided input.
 216   *
 217   * @param array $user An array containing password-related data.
 218   * @param string $password The plain-text input password.
 219   * @return bool Result of the comparison.
 220   */
 221  function verify_user_password($user, $password)
 222  {
 223      global $plugins;
 224  
 225      $result = null;
 226  
 227      $parameters = compact('user', 'password', 'result');
 228  
 229      if(!defined('IN_INSTALL') && !defined('IN_UPGRADE'))
 230      {
 231          $plugins->run_hooks('verify_user_password', $parameters);
 232      }
 233  
 234      if(!is_null($parameters['result']))
 235      {
 236          return $parameters['result'];
 237      }
 238      else
 239      {
 240          $password_fields = create_password($password, $user['salt'], $user);
 241  
 242          return my_hash_equals($user['password'], $password_fields['password']);
 243      }
 244  }
 245  
 246  /**
 247   * Generates a random salt
 248   *
 249   * @return string The salt.
 250   */
 251  function generate_salt()
 252  {
 253      return random_str(8);
 254  }
 255  
 256  /**
 257   * Generates a 50 character random login key.
 258   *
 259   * @return string The login key.
 260   */
 261  function generate_loginkey()
 262  {
 263      return random_str(50);
 264  }
 265  
 266  /**
 267   * Updates a user's salt in the database (does not update a password).
 268   *
 269   * @param int $uid The uid of the user to update.
 270   * @return string The new salt.
 271   */
 272  function update_salt($uid)
 273  {
 274      global $db;
 275  
 276      $salt = generate_salt();
 277      $sql_array = array(
 278          "salt" => $salt
 279      );
 280      $db->update_query("users", $sql_array, "uid='{$uid}'");
 281  
 282      return $salt;
 283  }
 284  
 285  /**
 286   * Generates a new login key for a user.
 287   *
 288   * @param int $uid The uid of the user to update.
 289   * @return string The new login key.
 290   */
 291  function update_loginkey($uid)
 292  {
 293      global $db;
 294  
 295      $loginkey = generate_loginkey();
 296      $sql_array = array(
 297          "loginkey" => $loginkey
 298      );
 299      $db->update_query("users", $sql_array, "uid='{$uid}'");
 300  
 301      return $loginkey;
 302  
 303  }
 304  
 305  /**
 306   * Adds a thread to a user's thread subscription list.
 307   * If no uid is supplied, the currently logged in user's id will be used.
 308   *
 309   * @param int $tid The tid of the thread to add to the list.
 310   * @param int $notification (Optional) The type of notification to receive for replies (0=none, 1=email, 2=pm)
 311   * @param int $uid (Optional) The uid of the user who's list to update.
 312   * @return boolean True when success, false when otherwise.
 313   */
 314  function add_subscribed_thread($tid, $notification=1, $uid=0)
 315  {
 316      global $mybb, $db;
 317  
 318      if(!$uid)
 319      {
 320          $uid = $mybb->user['uid'];
 321      }
 322  
 323      if(!$uid)
 324      {
 325          return false;
 326      }
 327  
 328      $query = $db->simple_select("threadsubscriptions", "*", "tid='".(int)$tid."' AND uid='".(int)$uid."'");
 329      $subscription = $db->fetch_array($query);
 330      if(!$subscription)
 331      {
 332          $insert_array = array(
 333              'uid' => (int)$uid,
 334              'tid' => (int)$tid,
 335              'notification' => (int)$notification,
 336              'dateline' => TIME_NOW
 337          );
 338          $db->insert_query("threadsubscriptions", $insert_array);
 339      }
 340      else
 341      {
 342          // Subscription exists - simply update notification
 343          $update_array = array(
 344              "notification" => (int)$notification
 345          );
 346          $db->update_query("threadsubscriptions", $update_array, "uid='{$uid}' AND tid='{$tid}'");
 347      }
 348      return true;
 349  }
 350  
 351  /**
 352   * Remove a thread from a user's thread subscription list.
 353   * If no uid is supplied, the currently logged in user's id will be used.
 354   *
 355   * @param int $tid The tid of the thread to remove from the list.
 356   * @param int $uid (Optional) The uid of the user who's list to update.
 357   * @return boolean True when success, false when otherwise.
 358   */
 359  function remove_subscribed_thread($tid, $uid=0)
 360  {
 361      global $mybb, $db;
 362  
 363      if(!$uid)
 364      {
 365          $uid = $mybb->user['uid'];
 366      }
 367  
 368      if(!$uid)
 369      {
 370          return false;
 371      }
 372      $db->delete_query("threadsubscriptions", "tid='".$tid."' AND uid='{$uid}'");
 373  
 374      return true;
 375  }
 376  
 377  /**
 378   * Adds a forum to a user's forum subscription list.
 379   * If no uid is supplied, the currently logged in user's id will be used.
 380   *
 381   * @param int $fid The fid of the forum to add to the list.
 382   * @param int $uid (Optional) The uid of the user who's list to update.
 383   * @return boolean True when success, false when otherwise.
 384   */
 385  function add_subscribed_forum($fid, $uid=0)
 386  {
 387      global $mybb, $db;
 388  
 389      if(!$uid)
 390      {
 391          $uid = $mybb->user['uid'];
 392      }
 393  
 394      if(!$uid)
 395      {
 396          return false;
 397      }
 398  
 399      $fid = (int)$fid;
 400      $uid = (int)$uid;
 401  
 402      $query = $db->simple_select("forumsubscriptions", "*", "fid='".$fid."' AND uid='{$uid}'", array('limit' => 1));
 403      $fsubscription = $db->fetch_array($query);
 404      if(!$fsubscription)
 405      {
 406          $insert_array = array(
 407              'fid' => $fid,
 408              'uid' => $uid
 409          );
 410          $db->insert_query("forumsubscriptions", $insert_array);
 411      }
 412  
 413      return true;
 414  }
 415  
 416  /**
 417   * Removes a forum from a user's forum subscription list.
 418   * If no uid is supplied, the currently logged in user's id will be used.
 419   *
 420   * @param int $fid The fid of the forum to remove from the list.
 421   * @param int $uid (Optional) The uid of the user who's list to update.
 422   * @return boolean True when success, false when otherwise.
 423   */
 424  function remove_subscribed_forum($fid, $uid=0)
 425  {
 426      global $mybb, $db;
 427  
 428      if(!$uid)
 429      {
 430          $uid = $mybb->user['uid'];
 431      }
 432  
 433      if(!$uid)
 434      {
 435          return false;
 436      }
 437      $db->delete_query("forumsubscriptions", "fid='".$fid."' AND uid='{$uid}'");
 438  
 439      return true;
 440  }
 441  
 442  /**
 443   * Constructs the usercp navigation menu.
 444   *
 445   */
 446  function usercp_menu()
 447  {
 448      global $mybb, $templates, $theme, $plugins, $lang, $usercpnav, $usercpmenu;
 449  
 450      $lang->load("usercpnav");
 451  
 452      // Add the default items as plugins with separated priorities of 10
 453      if($mybb->settings['enablepms'] != 0 && $mybb->usergroup['canusepms'] == 1)
 454      {
 455          $plugins->add_hook("usercp_menu", "usercp_menu_messenger", 10);
 456      }
 457  
 458      if($mybb->usergroup['canusercp'] == 1)
 459      {
 460          $plugins->add_hook("usercp_menu", "usercp_menu_profile", 20);
 461          $plugins->add_hook("usercp_menu", "usercp_menu_misc", 30);
 462      }
 463  
 464      // Run the plugin hooks
 465      $plugins->run_hooks("usercp_menu");
 466      global $usercpmenu;
 467  
 468      if($mybb->usergroup['canusercp'] == 1)
 469      {
 470          eval("\$ucp_nav_home = \"".$templates->get("usercp_nav_home")."\";");
 471      }
 472  
 473      eval("\$usercpnav = \"".$templates->get("usercp_nav")."\";");
 474  
 475      $plugins->run_hooks("usercp_menu_built");
 476  }
 477  
 478  /**
 479   * Constructs the usercp messenger menu.
 480   *
 481   */
 482  function usercp_menu_messenger()
 483  {
 484      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 485  
 486      $expaltext = (in_array("usercppms", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 487      $usercp_nav_messenger = $templates->get("usercp_nav_messenger");
 488      // Hide tracking link if no permission
 489      $tracking = '';
 490      if($mybb->usergroup['cantrackpms'])
 491      {
 492          $tracking = $templates->get("usercp_nav_messenger_tracking");
 493      }
 494      eval("\$ucp_nav_tracking = \"". $tracking ."\";");
 495  
 496      // Hide compose link if no permission
 497      $ucp_nav_compose = '';
 498      if($mybb->usergroup['cansendpms'] == 1)
 499      {
 500          eval("\$ucp_nav_compose = \"".$templates->get("usercp_nav_messenger_compose")."\";");
 501      }
 502  
 503      $folderlinks = $folder_id = $folder_name = '';
 504      $foldersexploded = explode("$%%$", $mybb->user['pmfolders']);
 505      foreach($foldersexploded as $key => $folders)
 506      {
 507          $folderinfo = explode("**", $folders, 2);
 508          $folderinfo[1] = get_pm_folder_name($folderinfo[0], $folderinfo[1]);
 509          if($folderinfo[0] == 4)
 510          {
 511              $class = "usercp_nav_trash_pmfolder";
 512          }
 513          else if($folderlinks)
 514          {
 515              $class = "usercp_nav_sub_pmfolder";
 516          }
 517          else
 518          {
 519              $class = "usercp_nav_pmfolder";
 520          }
 521  
 522          $folder_id = $folderinfo[0];
 523          $folder_name = $folderinfo[1];
 524  
 525          eval("\$folderlinks .= \"".$templates->get("usercp_nav_messenger_folder")."\";");
 526      }
 527  
 528      if(!isset($collapsedimg['usercppms']))
 529      {
 530          $collapsedimg['usercppms'] = '';
 531      }
 532  
 533      if(!isset($collapsed['usercppms_e']))
 534      {
 535          $collapsed['usercppms_e'] = '';
 536      }
 537  
 538      eval("\$usercpmenu .= \"".$usercp_nav_messenger."\";");
 539  }
 540  
 541  /**
 542   * Constructs the usercp profile menu.
 543   *
 544   */
 545  function usercp_menu_profile()
 546  {
 547      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 548  
 549      $changenameop = '';
 550      if($mybb->usergroup['canchangename'] != 0)
 551      {
 552          eval("\$changenameop = \"".$templates->get("usercp_nav_changename")."\";");
 553      }
 554  
 555      $changesigop = '';
 556      if($mybb->usergroup['canusesig'] == 1 && ($mybb->usergroup['canusesigxposts'] == 0 || $mybb->usergroup['canusesigxposts'] > 0 && $mybb->user['postnum'] > $mybb->usergroup['canusesigxposts']))
 557      {
 558          if($mybb->user['suspendsignature'] == 0 || $mybb->user['suspendsignature'] == 1 && $mybb->user['suspendsigtime'] > 0 && $mybb->user['suspendsigtime'] < TIME_NOW)
 559          {
 560              eval("\$changesigop = \"".$templates->get("usercp_nav_editsignature")."\";");
 561          }
 562      }
 563  
 564      if(!isset($collapsedimg['usercpprofile']))
 565      {
 566          $collapsedimg['usercpprofile'] = '';
 567      }
 568  
 569      if(!isset($collapsed['usercpprofile_e']))
 570      {
 571          $collapsed['usercpprofile_e'] = '';
 572      }
 573  
 574      $expaltext = (in_array("usercpprofile", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 575      eval("\$usercpmenu .= \"".$templates->get("usercp_nav_profile")."\";");
 576  }
 577  
 578  /**
 579   * Constructs the usercp misc menu.
 580   *
 581   */
 582  function usercp_menu_misc()
 583  {
 584      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 585  
 586      $draftstart = $draftend = $attachmentop = '';
 587      $draftcount = $lang->ucp_nav_drafts;
 588  
 589      $query = $db->simple_select("posts", "COUNT(pid) AS draftcount", "visible = '-2' AND uid = '{$mybb->user['uid']}'");
 590      $count = $db->fetch_field($query, 'draftcount');
 591  
 592      if($count > 0)
 593      {
 594          $draftcount = $lang->sprintf($lang->ucp_nav_drafts_active, my_number_format($count));
 595      }
 596  
 597      if($mybb->settings['enableattachments'] != 0)
 598      {
 599          eval("\$attachmentop = \"".$templates->get("usercp_nav_attachments")."\";");
 600      }
 601  
 602      if(!isset($collapsedimg['usercpmisc']))
 603      {
 604          $collapsedimg['usercpmisc'] = '';
 605      }
 606  
 607      if(!isset($collapsed['usercpmisc_e']))
 608      {
 609          $collapsed['usercpmisc_e'] = '';
 610      }
 611  
 612      $profile_link = get_profile_link($mybb->user['uid']);
 613      $expaltext = (in_array("usercpmisc", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 614      eval("\$usercpmenu .= \"".$templates->get("usercp_nav_misc")."\";");
 615  }
 616  
 617  /**
 618   * Gets the usertitle for a specific uid.
 619   *
 620   * @param int $uid The uid of the user to get the usertitle of.
 621   * @return string The usertitle of the user.
 622   */
 623  function get_usertitle($uid=0)
 624  {
 625      global $db, $mybb;
 626  
 627      if($mybb->user['uid'] == $uid)
 628      {
 629          $user = $mybb->user;
 630      }
 631      else
 632      {
 633          $query = $db->simple_select("users", "usertitle,postnum", "uid='$uid'", array('limit' => 1));
 634          $user = $db->fetch_array($query);
 635      }
 636  
 637      if($user['usertitle'])
 638      {
 639          return $user['usertitle'];
 640      }
 641      else
 642      {
 643          $usertitles = $mybb->cache->read('usertitles');
 644          foreach($usertitles as $title)
 645          {
 646              if($title['posts'] <= $user['postnum'])
 647              {
 648                  $usertitle = $title;
 649                  break;
 650              }
 651          }
 652  
 653          return $usertitle['title'];
 654      }
 655  }
 656  
 657  /**
 658   * Updates a users private message count in the users table with the number of pms they have.
 659   *
 660   * @param int $uid The user id to update the count for. If none, assumes currently logged in user.
 661   * @param int $count_to_update Bitwise value for what to update. 1 = total, 2 = new, 4 = unread. Combinations accepted.
 662   * @return array The updated counters
 663   */
 664  function update_pm_count($uid=0, $count_to_update=7)
 665  {
 666      global $db, $mybb;
 667  
 668      // If no user id, assume that we mean the current logged in user.
 669      if((int)$uid == 0)
 670      {
 671          $uid = $mybb->user['uid'];
 672      }
 673  
 674      $uid = (int)$uid;
 675      $pmcount = array();
 676      if($uid == 0)
 677      {
 678          return $pmcount;
 679      }
 680  
 681      // Update total number of messages.
 682      if($count_to_update & 1)
 683      {
 684          $query = $db->simple_select("privatemessages", "COUNT(pmid) AS pms_total", "uid='".$uid."'");
 685          $total = $db->fetch_array($query);
 686          $pmcount['totalpms'] = $total['pms_total'];
 687      }
 688  
 689      // Update number of unread messages.
 690      if($count_to_update & 2 && $db->field_exists("unreadpms", "users") == true)
 691      {
 692          $query = $db->simple_select("privatemessages", "COUNT(pmid) AS pms_unread", "uid='".$uid."' AND status='0' AND folder='1'");
 693          $unread = $db->fetch_array($query);
 694          $pmcount['unreadpms'] = $unread['pms_unread'];
 695      }
 696  
 697      if(!empty($pmcount))
 698      {
 699          $db->update_query("users", $pmcount, "uid='".$uid."'");
 700      }
 701      return $pmcount;
 702  }
 703  
 704  /**
 705   * Return the language specific name for a PM folder.
 706   *
 707   * @param int $fid The ID of the folder.
 708   * @param string $name The folder name - can be blank, will use language default.
 709   * @return string The name of the folder.
 710   */
 711  function get_pm_folder_name($fid, $name="")
 712  {
 713      global $lang;
 714  
 715      if($name != '')
 716      {
 717          return $name;
 718      }
 719  
 720      switch($fid)
 721      {
 722          case 0:
 723              return $lang->folder_inbox;
 724              break;
 725          case 1:
 726              return $lang->folder_unread;
 727              break;
 728          case 2:
 729              return $lang->folder_sent_items;
 730              break;
 731          case 3:
 732              return $lang->folder_drafts;
 733              break;
 734          case 4:
 735              return $lang->folder_trash;
 736              break;
 737          default:
 738              return $lang->folder_untitled;
 739      }
 740  }
 741  
 742  /**
 743   * Generates a security question for registration.
 744   *
 745   * @param int $old_qid Optional ID of the old question.
 746   * @return string The question session id.
 747   */
 748  function generate_question($old_qid=0)
 749  {
 750      global $db;
 751  
 752      if($db->type == 'pgsql' || $db->type == 'sqlite')
 753      {
 754          $order_by = 'RANDOM()';
 755      }
 756      else
 757      {
 758          $order_by = 'RAND()';
 759      }
 760  
 761      $excl_old = '';
 762      if($old_qid)
 763      {
 764          $excl_old = ' AND qid != '.(int)$old_qid;
 765      }
 766  
 767      $query = $db->simple_select('questions', 'qid, shown', "active=1{$excl_old}", array('limit' => 1, 'order_by' => $order_by));
 768      $question = $db->fetch_array($query);
 769  
 770      if(!$db->num_rows($query))
 771      {
 772          // No active questions exist
 773          return false;
 774      }
 775      else
 776      {
 777          $sessionid = random_str(32);
 778  
 779          $sql_array = array(
 780              "sid" => $sessionid,
 781              "qid" => $question['qid'],
 782              "dateline" => TIME_NOW
 783          );
 784          $db->insert_query("questionsessions", $sql_array);
 785  
 786          $update_question = array(
 787              "shown" => $question['shown'] + 1
 788          );
 789          $db->update_query("questions", $update_question, "qid = '{$question['qid']}'");
 790  
 791          return $sessionid;
 792      }
 793  }
 794  
 795  /**
 796   * Check whether we can show the Purge Spammer Feature
 797   *
 798   * @param int $post_count The users post count
 799   * @param int $usergroup The usergroup of our user
 800   * @param int $uid The uid of our user
 801   * @return boolean Whether or not to show the feature
 802   */
 803  function purgespammer_show($post_count, $usergroup, $uid)
 804  {
 805          global $mybb, $cache;
 806  
 807          // only show this if the current user has permission to use it and the user has less than the post limit for using this tool
 808          $bangroup = $mybb->settings['purgespammerbangroup'];
 809          $usergroups = $cache->read('usergroups');
 810  
 811          return ($mybb->user['uid'] != $uid && is_member($mybb->settings['purgespammergroups']) && !is_super_admin($uid)
 812              && !$usergroups[$usergroup]['cancp'] && !$usergroups[$usergroup]['canmodcp'] && !$usergroups[$usergroup]['issupermod']
 813              && (str_replace($mybb->settings['thousandssep'], '', $post_count) <= $mybb->settings['purgespammerpostlimit'] || $mybb->settings['purgespammerpostlimit'] == 0)
 814              && !is_member($bangroup, $uid) && !$usergroups[$usergroup]['isbannedgroup']);
 815  }


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