drupal/modules/ban.module

<?php

$module = array("help" => "ban_help",
                "admin" => "ban_admin");

include_once "includes/ban.inc";


function ban_help() {
 ?>
  <P>The ban module keeps a list of bans in four categories:</P>
  <UL>
   <LI>Email bans: this type of ban specifies which email addresses will be rejected when registering new users. Can be used to prevent users from using a free email account (e.g. userid@hotmail.com).</LI>
   <LI>Profanity bans: <I>under construction</I></LI>
   <LI>Hostname bans: this type of ban allows you to block certain hostnames from access to your site or from registering as a new user.</LI>
   <LI>Username bans: this ban will block certain usernames from registration.  Typical examples include <I>admin</I>, <I>anonymous</I>, <I>root</I>, <I>webmaster</I>, etc.</LI>
  </UL>
  <P>The ban module allows you to use a flexible wild-card ban system. This means you can block all email addresses from a certain domain name, block every username starting with "guest", etc.  To do this, use the following wild-card characters:</P>
  <UL>
   <LI>&nbsp;% : matches any number of characters, including zero characters.</LI>
   <LI>&nbsp;_ : matches exactly one character.</LI>
  </UL>
  <P><U>Examples:</U></P>
  <UL>
   <LI>Email address bans <CODE>%@hotmail.com</CODE>, <CODE>%@altavista.%</CODE>, <CODE>%@usa.net</CODE>, etc.  Used to prevent users from using free email accounts, which might be used to cause trouble.</LI>
   <LI>Username bans <CODE>root</CODE>, <CODE>webmaster</CODE>, <CODE>admin%</CODE>, etc.  Used to prevent administrator impersonators.</LI>
  </UL>
 <?php
}

function ban_admin_new($mask, $category, $reason) {
  ban_add($mask, $category, $reason, &$message);
  $output .= "$message\n";
  print $output;
}

function ban_display($category = "") {
  global $type2index;

  $category = $category ? $category : 1;

  $result = db_query("SELECT * FROM bans WHERE type = $category ORDER BY mask");

  $output .= "<TABLE BORDER=\"1\" CELLPADDING=\"2\" CELLSPACING=\"2\">\n";
  $output .= " <TR>\n";
  $output .= "  <TH COLSPAN=\"3\">\n";
  $output .= "   <FORM ACTION=\"admin.php?mod=ban\" METHOD=\"post\">\n";
  $output .= "    <SELECT NAME=\"category\">\n";
  for (reset($type2index); $cur = current($type2index); next($type2index)) {
    $output .= "     <OPTION VALUE=\"$cur\"". ($cur == $category ? " SELECTED" : "") .">Bans by ". key($type2index) ."</OPTION>\n";
  }
  $output .= "    </SELECT>\n";
  $output .= "    <INPUT TYPE=\"submit\" NAME=\"op\" VALUE=\"Update\">\n";
  $output .= "   </FORM>\n";
  $output .= "  </TH>\n";
  $output .= " </TR>\n";
  $output .= " <TR><TH>mask</TH><TH>reason</TH><TH>operations</TH></TR>\n";
  while ($ban = db_fetch_object($result)) {
    $output .= "  <TR><TD>$ban->mask</TD><TD>$ban->reason</TD><TD ALIGN=\"center\"><A HREF=\"admin.php?mod=ban&op=delete&category=$category&id=$ban->id\">delete</A></TD></TR>\n";
  }
  $output .= " <TR><TD COLSPAN=\"3\"><SMALL>%: matches any number of characters, even zero characters.<BR>_: matches exactly one character.</SMALL></TD></TR>\n";
  $output .= "</TABLE>\n";

  print $output;
}

function ban_admin_add() {
  global $type2index;

  $output .= "<H3>Add new ban:</H3>\n";
  $output .= "<FORM ACTION=\"admin.php?mod=ban\" METHOD=\"post\">\n";

  $output .= "<B>Banmask:</B><BR>\n";
  $output .= "<INPUT TYPE=\"text\" NAME=\"mask\" SIZE=\"35\"><P>\n";

  $output .= "<B>Type:</B><BR>\n";
  for (reset($type2index); $cur = current($type2index); next($type2index)) $options .= "<OPTION VALUE=\"$cur\"". ($cur == $category ? " SELECTED" : "") .">". key($type2index) ."</OPTION>\n";
  $output .= "<SELECT NAME=\"category\"\">$options</SELECT><P>\n";

  $output .= "<B>Reason:</B><BR>\n";
  $output .= "<TEXTAREA NAME=\"reason\" COLS=\"50\" ROWS=\"5\"></TEXTAREA><P>\n";

  $output .= "<INPUT TYPE=\"submit\" NAME=\"op\" VALUE=\"Add ban\"><BR>\n";
  $output .= "</FORM>\n";

  print $output;
}

function ban_check($mask, $category) {
  $ban = ban_match($mask, $category);
  $output .= "". ($ban ? "Matched ban '<B>$ban->mask</B>' with reason: <I>$ban->reason</I>.<P>\n" : "No matching bans for '$mask'.<P>\n") ."";
  print $output;
}

function ban_admin_check() {
  global $type2index;

  $output .= "<H3>Ban check:</H3>\n";
  $output .= "<FORM ACTION=\"admin.php?mod=ban\" METHOD=\"post\">\n";

  $output .= "<B>Banmask:</B><BR>\n";
  $output .= "<INPUT TYPE=\"text\" NAME=\"mask\" SIZE=\"35\"><P>\n";

  $output .= "<B>Type:</B><BR>\n";
  for (reset($type2index); $cur = current($type2index); next($type2index)) $options .= "<OPTION VALUE=\"$cur\"". ($cur == $category ? " SELECTED" : "") .">". key($type2index) ."</OPTION>\n";
  $output .= "<SELECT NAME=\"category\"\">$options</SELECT><P>\n";

  $output .= "<INPUT TYPE=\"submit\" NAME=\"op\" VALUE=\"Check ban\"><BR>\n";
  $output .= "</FORM>\n";

  print $output;
}

function ban_admin() {
  global $op, $id, $mask, $category, $reason;

  print "<SMALL><A HREF=\"admin.php?mod=ban&op=add\">add ban</A> | <A HREF=\"admin.php?mod=ban&op=check\">check ban</A> | <A HREF=\"admin.php?mod=ban\">overview</A> | <A HREF=\"admin.php?mod=ban&op=help\">help</A></SMALL><HR>\n";

  switch ($op) {
    case "Add ban":
      ban_admin_new(check_input($mask), check_input($category), check_input($reason));
      ban_display(check_input($category));
      break;
    case "Check ban":
      ban_check(check_input($mask), check_input($category));
      break;
    case "add":
      ban_admin_add();
      break;
    case "help":
      ban_help();
      break;
    case "check":
      ban_admin_check();
      break;
    case "delete":
      ban_delete(check_input($id));
    default:
      ban_display(check_input($category));
  }
}

?>