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<?php

/**
 * This file contains all the functions used for the ban center.
 *
 * @todo refactor as controller-model
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2019 Simple Machines and individual contributors
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 RC1
 */

if (!defined('SMF'))
    die('No direct access...');

/**
 * Ban center. The main entrance point for all ban center functions.
 * It is accesssed by ?action=admin;area=ban.
 * It choses a function based on the 'sa' parameter, like many others.
 * The default sub-action is BanList().
 * It requires the ban_members permission.
 * It initializes the admin tabs.
 *
 * uses ManageBans template.
 */
function Ban()
{
    global $context, $txt, $scripturl;

    isAllowedTo('manage_bans');

    loadTemplate('ManageBans');

    $subActions = array(
        'add' => 'BanEdit',
        'browse' => 'BanBrowseTriggers',
        'edittrigger' => 'BanEditTrigger',
        'edit' => 'BanEdit',
        'list' => 'BanList',
        'log' => 'BanLog',
    );

    // Default the sub-action to 'view ban list'.
    $_REQUEST['sa'] = isset($_REQUEST['sa']) && isset($subActions[$_REQUEST['sa']]) ? $_REQUEST['sa'] : 'list';

    $context['page_title'] = $txt['ban_title'];
    $context['sub_action'] = $_REQUEST['sa'];

    // Tabs for browsing the different ban functions.
    $context[$context['admin_menu_name']]['tab_data'] = array(
        'title' => $txt['ban_title'],
        'help' => 'ban_members',
        'description' => $txt['ban_description'],
        'tabs' => array(
            'list' => array(
                'description' => $txt['ban_description'],
                'href' => $scripturl . '?action=admin;area=ban;sa=list',
                'is_selected' => $_REQUEST['sa'] == 'list' || $_REQUEST['sa'] == 'edit' || $_REQUEST['sa'] == 'edittrigger',
            ),
            'add' => array(
                'description' => $txt['ban_description'],
                'href' => $scripturl . '?action=admin;area=ban;sa=add',
                'is_selected' => $_REQUEST['sa'] == 'add',
            ),
            'browse' => array(
                'description' => $txt['ban_trigger_browse_description'],
                'href' => $scripturl . '?action=admin;area=ban;sa=browse',
                'is_selected' => $_REQUEST['sa'] == 'browse',
            ),
            'log' => array(
                'description' => $txt['ban_log_description'],
                'href' => $scripturl . '?action=admin;area=ban;sa=log',
                'is_selected' => $_REQUEST['sa'] == 'log',
                'is_last' => true,
            ),
        ),
    );

    call_integration_hook('integrate_manage_bans', array(&$subActions));

    // Call the right function for this sub-action.
    call_helper($subActions[$_REQUEST['sa']]);
}

/**
 * Shows a list of bans currently set.
 * It is accessed by ?action=admin;area=ban;sa=list.
 * It removes expired bans.
 * It allows sorting on different criteria.
 * It also handles removal of selected ban items.
 *
 * uses the main ManageBans template.
 */
function BanList()
{
    global $txt, $context, $scripturl;
    global $user_info, $sourcedir, $modSettings;

    // User pressed the 'remove selection button'.
    if (!empty($_POST['removeBans']) && !empty($_POST['remove']) && is_array($_POST['remove']))
    {
        checkSession();

        // Make sure every entry is a proper integer.
        array_map('intval', $_POST['remove']);

        // Unban them all!
        removeBanGroups($_POST['remove']);
        removeBanTriggers($_POST['remove']);

        // No more caching this ban!
        updateSettings(array('banLastUpdated' => time()));

        // Some members might be unbanned now. Update the members table.
        updateBanMembers();
    }

    // Create a date string so we don't overload them with date info.
    if (preg_match('~%[AaBbCcDdeGghjmuYy](?:[^%]*%[AaBbCcDdeGghjmuYy])*~', $user_info['time_format'], $matches) == 0 || empty($matches[0]))
        $context['ban_time_format'] = $user_info['time_format'];
    else
        $context['ban_time_format'] = $matches[0];

    $listOptions = array(
        'id' => 'ban_list',
        'title' => $txt['ban_title'],
        'items_per_page' => $modSettings['defaultMaxListItems'],
        'base_href' => $scripturl . '?action=admin;area=ban;sa=list',
        'default_sort_col' => 'added',
        'default_sort_dir' => 'desc',
        'get_items' => array(
            'function' => 'list_getBans',
        ),
        'get_count' => array(
            'function' => 'list_getNumBans',
        ),
        'no_items_label' => $txt['ban_no_entries'],
        'columns' => array(
            'name' => array(
                'header' => array(
                    'value' => $txt['ban_name'],
                ),
                'data' => array(
                    'db' => 'name',
                ),
                'sort' => array(
                    'default' => 'bg.name',
                    'reverse' => 'bg.name DESC',
                ),
            ),
            'notes' => array(
                'header' => array(
                    'value' => $txt['ban_notes'],
                ),
                'data' => array(
                    'db' => 'notes',
                    'class' => 'smalltext',
                ),
                'sort' => array(
                    'default' => 'LENGTH(bg.notes) > 0 DESC, bg.notes',
                    'reverse' => 'LENGTH(bg.notes) > 0, bg.notes DESC',
                ),
            ),
            'reason' => array(
                'header' => array(
                    'value' => $txt['ban_reason'],
                ),
                'data' => array(
                    'db' => 'reason',
                    'class' => 'smalltext',
                ),
                'sort' => array(
                    'default' => 'LENGTH(bg.reason) > 0 DESC, bg.reason',
                    'reverse' => 'LENGTH(bg.reason) > 0, bg.reason DESC',
                ),
            ),
            'added' => array(
                'header' => array(
                    'value' => $txt['ban_added'],
                ),
                'data' => array(
                    'function' => function($rowData) use ($context)
                    {
                        return timeformat($rowData['ban_time'], empty($context['ban_time_format']) ? true : $context['ban_time_format']);
                    },
                ),
                'sort' => array(
                    'default' => 'bg.ban_time',
                    'reverse' => 'bg.ban_time DESC',
                ),
            ),
            'expires' => array(
                'header' => array(
                    'value' => $txt['ban_expires'],
                ),
                'data' => array(
                    'function' => function($rowData) use ($txt)
                    {
                        // This ban never expires...whahaha.
                        if ($rowData['expire_time'] === null)
                            return $txt['never'];

                        // This ban has already expired.
                        elseif ($rowData['expire_time'] < time())
                            return sprintf('<span class="red">%1$s</span>', $txt['ban_expired']);

                        // Still need to wait a few days for this ban to expire.
                        else
                            return sprintf('%1$d&nbsp;%2$s', ceil(($rowData['expire_time'] - time()) / (60 * 60 * 24)), $txt['ban_days']);
                    },
                ),
                'sort' => array(
                    'default' => 'COALESCE(bg.expire_time, 1=1) DESC, bg.expire_time DESC',
                    'reverse' => 'COALESCE(bg.expire_time, 1=1), bg.expire_time',
                ),
            ),
            'num_triggers' => array(
                'header' => array(
                    'value' => $txt['ban_triggers'],
                ),
                'data' => array(
                    'db' => 'num_triggers',
                ),
                'sort' => array(
                    'default' => 'num_triggers DESC',
                    'reverse' => 'num_triggers',
                ),
            ),
            'actions' => array(
                'header' => array(
                    'value' => $txt['ban_actions'],
                    'class' => 'centercol',
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<a href="' . $scripturl . '?action=admin;area=ban;sa=edit;bg=%1$d">' . $txt['modify'] . '</a>',
                        'params' => array(
                            'id_ban_group' => false,
                        ),
                    ),
                    'class' => 'centercol',
                ),
            ),
            'check' => array(
                'header' => array(
                    'value' => '<input type="checkbox" onclick="invertAll(this, this.form);">',
                    'class' => 'centercol',
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<input type="checkbox" name="remove[]" value="%1$d">',
                        'params' => array(
                            'id_ban_group' => false,
                        ),
                    ),
                    'class' => 'centercol',
                ),
            ),
        ),
        'form' => array(
            'href' => $scripturl . '?action=admin;area=ban;sa=list',
        ),
        'additional_rows' => array(
            array(
                'position' => 'top_of_list',
                'value' => '<input type="submit" name="removeBans" value="' . $txt['ban_remove_selected'] . '" class="button">',
            ),
            array(
                'position' => 'bottom_of_list',
                'value' => '<input type="submit" name="removeBans" value="' . $txt['ban_remove_selected'] . '" class="button">',
            ),
        ),
        'javascript' => '
        var removeBans = $("input[name=\'removeBans\']");

        removeBans.on( "click", function(e) {
            var removeItems = $("input[name=\'remove[]\']:checked").length;

            if (removeItems == 0)
            {
                e.preventDefault();
                return alert("' . $txt['select_item_check'] . '");
            }


            return confirm("' . $txt['ban_remove_selected_confirm'] . '");
        });',
    );

    require_once($sourcedir . '/Subs-List.php');
    createList($listOptions);

    $context['sub_template'] = 'show_list';
    $context['default_list'] = 'ban_list';
}

/**
 * Get bans, what else? For the given options.
 *
 * @param int $start Which item to start with (for pagination purposes)
 * @param int $items_per_page How many items to show on each page
 * @param string $sort A string telling ORDER BY how to sort the results
 * @return array An array of information about the bans for the list
 */
function list_getBans($start, $items_per_page, $sort)
{
    global $smcFunc;

    $request = $smcFunc['db_query']('', '
        SELECT bg.id_ban_group, bg.name, bg.ban_time, bg.expire_time, bg.reason, bg.notes, COUNT(bi.id_ban) AS num_triggers
        FROM {db_prefix}ban_groups AS bg
            LEFT JOIN {db_prefix}ban_items AS bi ON (bi.id_ban_group = bg.id_ban_group)
        GROUP BY bg.id_ban_group, bg.name, bg.ban_time, bg.expire_time, bg.reason, bg.notes
        ORDER BY {raw:sort}
        LIMIT {int:offset}, {int:limit}',
        array(
            'sort' => $sort,
            'offset' => $start,
            'limit' => $items_per_page,
        )
    );
    $bans = array();
    while ($row = $smcFunc['db_fetch_assoc']($request))
        $bans[] = $row;

    $smcFunc['db_free_result']($request);

    return $bans;
}

/**
 * Get the total number of ban from the ban group table
 *
 * @return int The total number of bans
 */
function list_getNumBans()
{
    global $smcFunc;

    $request = $smcFunc['db_query']('', '
        SELECT COUNT(*) AS num_bans
        FROM {db_prefix}ban_groups',
        array(
        )
    );
    list ($numBans) = $smcFunc['db_fetch_row']($request);
    $smcFunc['db_free_result']($request);

    return $numBans;
}

/**
 * This function is behind the screen for adding new bans and modifying existing ones.
 * Adding new bans:
 *  - is accessed by ?action=admin;area=ban;sa=add.
 *  - uses the ban_edit sub template of the ManageBans template.
 * Modifying existing bans:
 *  - is accessed by ?action=admin;area=ban;sa=edit;bg=x
 *  - uses the ban_edit sub template of the ManageBans template.
 *  - shows a list of ban triggers for the specified ban.
 */
function BanEdit()
{
    global $txt, $modSettings, $context, $scripturl, $smcFunc, $sourcedir;

    if ((isset($_POST['add_ban']) || isset($_POST['modify_ban']) || isset($_POST['remove_selection'])) && empty($context['ban_errors']))
        BanEdit2();

    $ban_group_id = isset($context['ban']['id']) ? $context['ban']['id'] : (isset($_REQUEST['bg']) ? (int) $_REQUEST['bg'] : 0);

    // Template needs this to show errors using javascript
    loadLanguage('Errors');
    createToken('admin-bet');
    $context['form_url'] = $scripturl . '?action=admin;area=ban;sa=edit';

    if (!empty($context['ban_errors']))
        foreach ($context['ban_errors'] as $error)
            $context['error_messages'][$error] = $txt[$error];

    else
    {
        // If we're editing an existing ban, get it from the database.
        if (!empty($ban_group_id))
        {
            $context['ban_group_id'] = $ban_group_id;

            // We're going to want this for making our list.
            require_once($sourcedir . '/Subs-List.php');

            $listOptions = array(
                'id' => 'ban_items',
                'base_href' => $scripturl . '?action=admin;area=ban;sa=edit;bg=' . $ban_group_id,
                'no_items_label' => $txt['ban_no_triggers'],
                'items_per_page' => $modSettings['defaultMaxListItems'],
                'get_items' => array(
                    'function' => 'list_getBanItems',
                    'params' => array(
                        'ban_group_id' => $ban_group_id,
                    ),
                ),
                'get_count' => array(
                    'function' => 'list_getNumBanItems',
                    'params' => array(
                        'ban_group_id' => $ban_group_id,
                    ),
                ),
                'columns' => array(
                    'type' => array(
                        'header' => array(
                            'value' => $txt['ban_banned_entity'],
                            'style' => 'width: 60%;text-align: left;',
                        ),
                        'data' => array(
                            'function' => function($ban_item) use ($txt)
                            {
                                if (in_array($ban_item['type'], array('ip', 'hostname', 'email')))
                                    return '<strong>' . $txt[$ban_item['type']] . ':</strong>&nbsp;' . $ban_item[$ban_item['type']];
                                elseif ($ban_item['type'] == 'user')
                                    return '<strong>' . $txt['username'] . ':</strong>&nbsp;' . $ban_item['user']['link'];
                                else
                                    return '<strong>' . $txt['unknown'] . ':</strong>&nbsp;' . $ban_item['no_bantype_selected'];
                            },
                            'style' => 'text-align: left;',
                        ),
                    ),
                    'hits' => array(
                        'header' => array(
                            'value' => $txt['ban_hits'],
                            'style' => 'width: 15%; text-align: center;',
                        ),
                        'data' => array(
                            'db' => 'hits',
                            'style' => 'text-align: center;',
                        ),
                    ),
                    'id' => array(
                        'header' => array(
                            'value' => $txt['ban_actions'],
                            'style' => 'width: 15%; text-align: center;',
                        ),
                        'data' => array(
                            'function' => function($ban_item) use ($txt, $context, $scripturl)
                            {
                                return '<a href="' . $scripturl . '?action=admin;area=ban;sa=edittrigger;bg=' . $context['ban_group_id'] . ';bi=' . $ban_item['id'] . '">' . $txt['ban_edit_trigger'] . '</a>';
                            },
                            'style' => 'text-align: center;',
                        ),
                    ),
                    'checkboxes' => array(
                        'header' => array(
                            'value' => '<input type="checkbox" onclick="invertAll(this, this.form, \'ban_items\');">',
                            'style' => 'width: 5%; text-align: center;',
                        ),
                        'data' => array(
                            'sprintf' => array(
                                'format' => '<input type="checkbox" name="ban_items[]" value="%1$d">',
                                'params' => array(
                                    'id' => false,
                                ),
                            ),
                            'style' => 'text-align: center;',
                        ),
                    ),
                ),
                'form' => array(
                    'href' => $scripturl . '?action=admin;area=ban;sa=edit;bg=' . $ban_group_id,
                ),
                'additional_rows' => array(
                    array(
                        'position' => 'above_table_headers',
                        'value' => '
                        <input type="submit" name="remove_selection" value="' . $txt['ban_remove_selected_triggers'] . '" class="button"> <a class="button" href="' . $scripturl . '?action=admin;area=ban;sa=edittrigger;bg=' . $ban_group_id . '">' . $txt['ban_add_trigger'] . '</a>',
                        'style' => 'text-align: right;',
                    ),
                    array(
                        'position' => 'above_table_headers',
                        'value' => '
                        <input type="hidden" name="bg" value="' . $ban_group_id . '">
                        <input type="hidden" name="' . $context['session_var'] . '" value="' . $context['session_id'] . '">
                        <input type="hidden" name="' . $context['admin-bet_token_var'] . '" value="' . $context['admin-bet_token'] . '">',
                    ),
                    array(
                        'position' => 'below_table_data',
                        'value' => '
                        <input type="submit" name="remove_selection" value="' . $txt['ban_remove_selected_triggers'] . '" class="button"> <a class="button" href="' . $scripturl . '?action=admin;area=ban;sa=edittrigger;bg=' . $ban_group_id . '">' . $txt['ban_add_trigger'] . '</a>',
                        'style' => 'text-align: right;',
                    ),
                    array(
                        'position' => 'below_table_data',
                        'value' => '
                        <input type="hidden" name="bg" value="' . $ban_group_id . '">
                        <input type="hidden" name="' . $context['session_var'] . '" value="' . $context['session_id'] . '">
                        <input type="hidden" name="' . $context['admin-bet_token_var'] . '" value="' . $context['admin-bet_token'] . '">',
                    ),
                ),
                'javascript' => '
        var removeBans = $("input[name=\'remove_selection\']");

        removeBans.on( "click", function(e) {
            var removeItems = $("input[name=\'ban_items[]\']:checked").length;

            if (removeItems == 0)
            {
                e.preventDefault();
                return alert("' . $txt['select_item_check'] . '");
            }


            return confirm("' . $txt['ban_remove_selected_confirm'] . '");
        });',
            );
            createList($listOptions);
        }
        // Not an existing one, then it's probably a new one.
        else
        {
            $context['ban'] = array(
                'id' => 0,
                'name' => '',
                'expiration' => array(
                    'status' => 'never',
                    'days' => 0
                ),
                'reason' => '',
                'notes' => '',
                'ban_days' => 0,
                'cannot' => array(
                    'access' => true,
                    'post' => false,
                    'register' => false,
                    'login' => false,
                ),
                'is_new' => true,
            );
            $context['ban_suggestions'] = array(
                'main_ip' => '',
                'hostname' => '',
                'email' => '',
                'member' => array(
                    'id' => 0,
                ),
            );

            // Overwrite some of the default form values if a user ID was given.
            if (!empty($_REQUEST['u']))
            {
                $request = $smcFunc['db_query']('', '
                    SELECT id_member, real_name, member_ip, email_address
                    FROM {db_prefix}members
                    WHERE id_member = {int:current_user}
                    LIMIT 1',
                    array(
                        'current_user' => (int) $_REQUEST['u'],
                    )
                );
                if ($smcFunc['db_num_rows']($request) > 0)
                {
                    list ($context['ban_suggestions']['member']['id'], $context['ban_suggestions']['member']['name'], $context['ban_suggestions']['main_ip'], $context['ban_suggestions']['email']) = $smcFunc['db_fetch_row']($request);
                    $context['ban_suggestions']['main_ip'] = inet_dtop($context['ban_suggestions']['main_ip']);
                }
                $smcFunc['db_free_result']($request);

                if (!empty($context['ban_suggestions']['member']['id']))
                {
                    $context['ban_suggestions']['href'] = $scripturl . '?action=profile;u=' . $context['ban_suggestions']['member']['id'];
                    $context['ban_suggestions']['member']['link'] = '<a href="' . $context['ban_suggestions']['href'] . '">' . $context['ban_suggestions']['member']['name'] . '</a>';

                    // Default the ban name to the name of the banned member.
                    $context['ban']['name'] = $context['ban_suggestions']['member']['name'];
                    // @todo: there should be a better solution...used to lock the "Ban on Username" input when banning from profile
                    $context['ban']['from_user'] = true;

                    // Would be nice if we could also ban the hostname.
                    if ((preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $context['ban_suggestions']['main_ip']) == 1 || isValidIPv6($context['ban_suggestions']['main_ip'])) && empty($modSettings['disableHostnameLookup']))
                        $context['ban_suggestions']['hostname'] = host_from_ip($context['ban_suggestions']['main_ip']);

                    $context['ban_suggestions']['other_ips'] = banLoadAdditionalIPs($context['ban_suggestions']['member']['id']);
                }
            }

            // We come from the mod center.
            elseif (isset($_GET['msg']) && !empty($_GET['msg']))
            {
                $request = $smcFunc['db_query']('', '
                    SELECT poster_name, poster_ip, poster_email
                    FROM {db_prefix}messages
                    WHERE id_msg = {int:message}
                    LIMIT 1',
                    array(
                        'message' => (int) $_REQUEST['msg'],
                    )
                );
                if ($smcFunc['db_num_rows']($request) > 0)
                {
                    list ($context['ban_suggestions']['member']['name'], $context['ban_suggestions']['main_ip'], $context['ban_suggestions']['email']) = $smcFunc['db_fetch_row']($request);
                    $context['ban_suggestions']['main_ip'] = inet_dtop($context['ban_suggestions']['main_ip']);
                }
                $smcFunc['db_free_result']($request);

                // Can't hurt to ban base on the guest name...
                $context['ban']['name'] = $context['ban_suggestions']['member']['name'];
                $context['ban']['from_user'] = true;
            }
        }
    }

    loadJavaScriptFile('suggest.js', array('minimize' => true), 'smf_suggest');
    $context['sub_template'] = 'ban_edit';

}

/**
 * Retrieves all the ban items belonging to a certain ban group
 *
 * @param int $start Which item to start with (for pagination purposes)
 * @param int $items_per_page How many items to show on each page
 * @param int $sort Not used here
 * @param int $ban_group_id The ID of the group to get the bans for
 * @return array An array with information about the returned ban items
 */
function list_getBanItems($start = 0, $items_per_page = 0, $sort = 0, $ban_group_id = 0)
{
    global $context, $smcFunc, $scripturl;

    $ban_items = array();
    $request = $smcFunc['db_query']('', '
        SELECT
            bi.id_ban, bi.hostname, bi.email_address, bi.id_member, bi.hits,
            bi.ip_low, bi.ip_high,
            bg.id_ban_group, bg.name, bg.ban_time, COALESCE(bg.expire_time, 0) AS expire_time, bg.reason, bg.notes, bg.cannot_access, bg.cannot_register, bg.cannot_login, bg.cannot_post,
            COALESCE(mem.id_member, 0) AS id_member, mem.member_name, mem.real_name
        FROM {db_prefix}ban_groups AS bg
            LEFT JOIN {db_prefix}ban_items AS bi ON (bi.id_ban_group = bg.id_ban_group)
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)
        WHERE bg.id_ban_group = {int:current_ban}
        LIMIT {int:start}, {int:items_per_page}',
        array(
            'current_ban' => $ban_group_id,
            'start' => $start,
            'items_per_page' => $items_per_page,
        )
    );
    if ($smcFunc['db_num_rows']($request) == 0)
        fatal_lang_error('ban_not_found', false);

    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        if (!isset($context['ban']))
        {
            $context['ban'] = array(
                'id' => $row['id_ban_group'],
                'name' => $row['name'],
                'expiration' => array(
                    'status' => empty($row['expire_time']) ? 'never' : ($row['expire_time'] < time() ? 'expired' : 'one_day'),
                    'days' => $row['expire_time'] > time() ? ($row['expire_time'] - time() < 86400 ? 1 : ceil(($row['expire_time'] - time()) / 86400)) : 0
                ),
                'reason' => $row['reason'],
                'notes' => $row['notes'],
                'cannot' => array(
                    'access' => !empty($row['cannot_access']),
                    'post' => !empty($row['cannot_post']),
                    'register' => !empty($row['cannot_register']),
                    'login' => !empty($row['cannot_login']),
                ),
                'is_new' => false,
                'hostname' => '',
                'email' => '',
            );
        }

        if (!empty($row['id_ban']))
        {
            $ban_items[$row['id_ban']] = array(
                'id' => $row['id_ban'],
                'hits' => $row['hits'],
            );
            if (!empty($row['ip_high']))
            {
                $ban_items[$row['id_ban']]['type'] = 'ip';
                $ban_items[$row['id_ban']]['ip'] = range2ip($row['ip_low'], $row['ip_high']);
            }
            elseif (!empty($row['hostname']))
            {
                $ban_items[$row['id_ban']]['type'] = 'hostname';
                $ban_items[$row['id_ban']]['hostname'] = str_replace('%', '*', $row['hostname']);
            }
            elseif (!empty($row['email_address']))
            {
                $ban_items[$row['id_ban']]['type'] = 'email';
                $ban_items[$row['id_ban']]['email'] = str_replace('%', '*', $row['email_address']);
            }
            elseif (!empty($row['id_member']))
            {
                $ban_items[$row['id_ban']]['type'] = 'user';
                $ban_items[$row['id_ban']]['user'] = array(
                    'id' => $row['id_member'],
                    'name' => $row['real_name'],
                    'href' => $scripturl . '?action=profile;u=' . $row['id_member'],
                    'link' => '<a href="' . $scripturl . '?action=profile;u=' . $row['id_member'] . '">' . $row['real_name'] . '</a>',
                );
            }
            // Invalid ban (member probably doesn't exist anymore).
            else
            {
                unset($ban_items[$row['id_ban']]);
                removeBanTriggers($row['id_ban']);
            }
        }
    }
    $smcFunc['db_free_result']($request);

    return $ban_items;
}

/**
 * Gets the number of ban items belonging to a certain ban group
 *
 * @return int The number of ban items
 */
function list_getNumBanItems()
{
    global $smcFunc, $context;

    $ban_group_id = isset($context['ban_group_id']) ? $context['ban_group_id'] : 0;

    $request = $smcFunc['db_query']('', '
        SELECT COUNT(bi.id_ban)
        FROM {db_prefix}ban_groups AS bg
            LEFT JOIN {db_prefix}ban_items AS bi ON (bi.id_ban_group = bg.id_ban_group)
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)
        WHERE bg.id_ban_group = {int:current_ban}',
        array(
            'current_ban' => $ban_group_id,
        )
    );
    list($banNumber) = $smcFunc['db_fetch_row']($request);
    $smcFunc['db_free_result']($request);

    return $banNumber;
}

/**
 * Finds additional IPs related to a certain user
 *
 * @param int $member_id The ID of the member to get additional IPs for
 * @return array An containing two arrays - ips_in_messages (IPs used in posts) and ips_in_errors (IPs used in error messages)
 */
function banLoadAdditionalIPs($member_id)
{
    // Borrowing a few language strings from profile.
    loadLanguage('Profile');

    $search_list = array();
    call_integration_hook('integrate_load_addtional_ip_ban', array(&$search_list));
    $search_list += array('ips_in_messages' => 'banLoadAdditionalIPsMember', 'ips_in_errors' => 'banLoadAdditionalIPsError');

    $return = array();
    foreach ($search_list as $key => $callable)
        if (is_callable($callable))
            $return[$key] = call_user_func($callable, $member_id);

    return $return;
}

/**
 * @param int $member_id The ID of the member
 * @return array An array of IPs used in posts by this member
 */
function banLoadAdditionalIPsMember($member_id)
{
    global $smcFunc;

    // Find some additional IP's used by this member.
    $message_ips = array();
    $request = $smcFunc['db_query']('', '
        SELECT DISTINCT poster_ip
        FROM {db_prefix}messages
        WHERE id_member = {int:current_user}
            AND poster_ip IS NOT NULL
        ORDER BY poster_ip',
        array(
            'current_user' => $member_id,
        )
    );
    while ($row = $smcFunc['db_fetch_assoc']($request))
        $message_ips[] = inet_dtop($row['poster_ip']);

    $smcFunc['db_free_result']($request);

    return $message_ips;
}

/**
 * @param int $member_id The ID of the member
 * @return array An array of IPs associated with error messages generated by this user
 */
function banLoadAdditionalIPsError($member_id)
{
    global $smcFunc;

    $error_ips = array();
    $request = $smcFunc['db_query']('', '
        SELECT DISTINCT ip
        FROM {db_prefix}log_errors
        WHERE id_member = {int:current_user}
            AND ip IS NOT NULL
        ORDER BY ip',
        array(
            'current_user' => $member_id,
        )
    );
    while ($row = $smcFunc['db_fetch_assoc']($request))
        $error_ips[] = inet_dtop($row['ip']);

    $smcFunc['db_free_result']($request);

    return $error_ips;
}

/**
 * This function handles submitted forms that add, modify or remove ban triggers.
 */
function banEdit2()
{
    global $smcFunc, $context;

    checkSession();
    validateToken('admin-bet');

    $context['ban_errors'] = array();

    // Adding or editing a ban group
    if (isset($_POST['add_ban']) || isset($_POST['modify_ban']))
    {
        // Let's collect all the information we need
        $ban_info['id'] = isset($_REQUEST['bg']) ? (int) $_REQUEST['bg'] : 0;
        $ban_info['is_new'] = empty($ban_info['id']);
        $ban_info['expire_date'] = !empty($_POST['expire_date']) ? (int) $_POST['expire_date'] : 0;
        $ban_info['expiration'] = array(
            'status' => isset($_POST['expiration']) && in_array($_POST['expiration'], array('never', 'one_day', 'expired')) ? $_POST['expiration'] : 'never',
            'days' => $ban_info['expire_date'],
        );
        $ban_info['db_expiration'] = $ban_info['expiration']['status'] == 'never' ? 'NULL' : ($ban_info['expiration']['status'] == 'one_day' ? time() + 24 * 60 * 60 * $ban_info['expire_date'] : 0);
        $ban_info['full_ban'] = empty($_POST['full_ban']) ? 0 : 1;
        $ban_info['reason'] = !empty($_POST['reason']) ? $smcFunc['htmlspecialchars']($_POST['reason'], ENT_QUOTES) : '';
        $ban_info['name'] = !empty($_POST['ban_name']) ? $smcFunc['htmlspecialchars']($_POST['ban_name'], ENT_QUOTES) : '';
        $ban_info['notes'] = isset($_POST['notes']) ? $smcFunc['htmlspecialchars']($_POST['notes'], ENT_QUOTES) : '';
        $ban_info['notes'] = str_replace(array("\r", "\n", '  '), array('', '<br>', '&nbsp; '), $ban_info['notes']);
        $ban_info['cannot']['access'] = empty($ban_info['full_ban']) ? 0 : 1;
        $ban_info['cannot']['post'] = !empty($ban_info['full_ban']) || empty($_POST['cannot_post']) ? 0 : 1;
        $ban_info['cannot']['register'] = !empty($ban_info['full_ban']) || empty($_POST['cannot_register']) ? 0 : 1;
        $ban_info['cannot']['login'] = !empty($ban_info['full_ban']) || empty($_POST['cannot_login']) ? 0 : 1;

        // Adding a new ban group
        if (empty($_REQUEST['bg']))
            $ban_group_id = insertBanGroup($ban_info);
        // Editing an existing ban group
        else
            $ban_group_id = updateBanGroup($ban_info);

        if (is_numeric($ban_group_id))
        {
            $ban_info['id'] = $ban_group_id;
            $ban_info['is_new'] = false;
        }

        $context['ban'] = $ban_info;
    }

    if (isset($_POST['ban_suggestions']))
        // @TODO: is $_REQUEST['bi'] ever set?
        $saved_triggers = saveTriggers($_POST['ban_suggestions'], $ban_info['id'], isset($_REQUEST['u']) ? (int) $_REQUEST['u'] : 0, isset($_REQUEST['bi']) ? (int) $_REQUEST['bi'] : 0);

    // Something went wrong somewhere... Oh well, let's go back.
    if (!empty($context['ban_errors']))
    {
        $context['ban_suggestions'] = !empty($saved_triggers) ? $saved_triggers : array();
        $context['ban']['from_user'] = true;
        $context['ban_suggestions'] = array_merge($context['ban_suggestions'], getMemberData((int) $_REQUEST['u']));

        // Not strictly necessary, but it's nice
        if (!empty($context['ban_suggestions']['member']['id']))
            $context['ban_suggestions']['other_ips'] = banLoadAdditionalIPs($context['ban_suggestions']['member']['id']);
        return BanEdit();
    }
    $context['ban_suggestions']['saved_triggers'] = !empty($saved_triggers) ? $saved_triggers : array();

    if (isset($_POST['ban_items']))
    {
        $ban_group_id = isset($_REQUEST['bg']) ? (int) $_REQUEST['bg'] : 0;
        array_map('intval', $_POST['ban_items']);

        removeBanTriggers($_POST['ban_items'], $ban_group_id);
    }

    // Register the last modified date.
    updateSettings(array('banLastUpdated' => time()));

    // Update the member table to represent the new ban situation.
    updateBanMembers();
    redirectexit('action=admin;area=ban;sa=edit;bg=' . $ban_group_id);
}

/**
 * Saves one or more ban triggers into a ban item: according to the suggestions
 * checks the $_POST variable to verify if the trigger is present
 *
 * @param array $suggestions An array of suggestedtriggers (IP, email, etc.)
 * @param int $ban_group The ID of the group we're saving bans for
 * @param int $member The ID of the member associated with this ban (if applicable)
 * @param int $ban_id The ID of the ban (0 if this is a new ban)
 *
 * @return array|bool An array with the triggers if there were errors or false on success
 */
function saveTriggers($suggestions = array(), $ban_group, $member = 0, $ban_id = 0)
{
    global $context;

    $triggers = array(
        'main_ip' => '',
        'hostname' => '',
        'email' => '',
        'member' => array(
            'id' => $member,
        )
    );

    foreach ($suggestions as $key => $value)
    {
        if (is_array($value))
            $triggers[$key] = $value;
        else
            $triggers[$value] = !empty($_POST[$value]) ? $_POST[$value] : '';
    }

    $ban_triggers = validateTriggers($triggers);

    // Time to save!
    if (!empty($ban_triggers['ban_triggers']) && empty($context['ban_errors']))
    {
        if (empty($ban_id))
            addTriggers($ban_group, $ban_triggers['ban_triggers'], $ban_triggers['log_info']);
        else
            updateTriggers($ban_id, $ban_group, array_shift($ban_triggers['ban_triggers']), $ban_triggers['log_info']);
    }
    if (!empty($context['ban_errors']))
        return $triggers;
    else
        return false;
}

/**
 * This function removes a bunch of triggers based on ids
 * Doesn't clean the inputs
 *
 * @param array $items_ids The items to remove
 * @param bool|int $group_id The ID of the group these triggers are associated with or false if deleting them from all groups
 * @return bool Always returns true
 */
function removeBanTriggers($items_ids = array(), $group_id = false)
{
    global $smcFunc, $scripturl;

    if ($group_id !== false)
        $group_id = (int) $group_id;

    if (empty($group_id) && empty($items_ids))
        return false;

    if (!is_array($items_ids))
        $items_ids = array($items_ids);

    $log_info = array();
    $ban_items = array();

    // First order of business: Load up the info so we can log this...
    $request = $smcFunc['db_query']('', '
        SELECT
            bi.id_ban, bi.hostname, bi.email_address, bi.id_member, bi.hits,
            bi.ip_low, bi.ip_high,
            COALESCE(mem.id_member, 0) AS id_member, mem.member_name, mem.real_name
        FROM {db_prefix}ban_items AS bi
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)
        WHERE bi.id_ban IN ({array_int:ban_list})',
        array(
            'ban_list' => $items_ids,
        )
    );

    // Get all the info for the log
    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        if (!empty($row['id_ban']))
        {
            $ban_items[$row['id_ban']] = array(
                'id' => $row['id_ban'],
            );
            if (!empty($row['ip_high']))
            {
                $ban_items[$row['id_ban']]['type'] = 'ip';
                $ban_items[$row['id_ban']]['ip'] = range2ip($row['ip_low'], $row['ip_high']);

                $is_range = (strpos($ban_items[$row['id_ban']]['ip'], '-') !== false || strpos($ban_items[$row['id_ban']]['ip'], '*') !== false);

                $log_info[] = array(
                    'bantype' => ($is_range ? 'ip_range' : 'main_ip'),
                    'value' => $ban_items[$row['id_ban']]['ip'],
                );
            }
            elseif (!empty($row['hostname']))
            {
                $ban_items[$row['id_ban']]['type'] = 'hostname';
                $ban_items[$row['id_ban']]['hostname'] = str_replace('%', '*', $row['hostname']);
                $log_info[] = array(
                    'bantype' => 'hostname',
                    'value' => $row['hostname'],
                );
            }
            elseif (!empty($row['email_address']))
            {
                $ban_items[$row['id_ban']]['type'] = 'email';
                $ban_items[$row['id_ban']]['email'] = str_replace('%', '*', $row['email_address']);
                $log_info[] = array(
                    'bantype' => 'email',
                    'value' => $ban_items[$row['id_ban']]['email'],
                );
            }
            elseif (!empty($row['id_member']))
            {
                $ban_items[$row['id_ban']]['type'] = 'user';
                $ban_items[$row['id_ban']]['user'] = array(
                    'id' => $row['id_member'],
                    'name' => $row['real_name'],
                    'href' => $scripturl . '?action=profile;u=' . $row['id_member'],
                    'link' => '<a href="' . $scripturl . '?action=profile;u=' . $row['id_member'] . '">' . $row['real_name'] . '</a>',
                );
                $log_info[] = array(
                    'bantype' => 'user',
                    'value' => $row['id_member'],
                );
            }
        }
    }

    // Log this!
    logTriggersUpdates($log_info, false, true);

    $smcFunc['db_free_result']($request);

    if ($group_id !== false)
    {
        $smcFunc['db_query']('', '
            DELETE FROM {db_prefix}ban_items
            WHERE id_ban IN ({array_int:ban_list})
                AND id_ban_group = {int:ban_group}',
            array(
                'ban_list' => $items_ids,
                'ban_group' => $group_id,
            )
        );
    }
    elseif (!empty($items_ids))
    {
        $smcFunc['db_query']('', '
            DELETE FROM {db_prefix}ban_items
            WHERE id_ban IN ({array_int:ban_list})',
            array(
                'ban_list' => $items_ids,
            )
        );
    }

    return true;
}

/**
 * This function removes a bunch of ban groups based on ids
 * Doesn't clean the inputs
 *
 * @param int[] $group_ids The IDs of the groups to remove
 * @return bool Returns ture if successful or false if $group_ids is empty
 */
function removeBanGroups($group_ids)
{
    global $smcFunc;

    if (!is_array($group_ids))
        $group_ids = array($group_ids);

    $group_ids = array_unique($group_ids);

    if (empty($group_ids))
        return false;

    $smcFunc['db_query']('', '
        DELETE FROM {db_prefix}ban_groups
        WHERE id_ban_group IN ({array_int:ban_list})',
        array(
            'ban_list' => $group_ids,
        )
    );

    return true;
}

/**
 * Removes logs - by default truncate the table
 * Doesn't clean the inputs
 *
 * @param array $ids Empty array to clear the ban log or the IDs of the log entries to remove
 * @return bool Returns true if successful or false if $ids is invalid
 */
function removeBanLogs($ids = array())
{
    global $smcFunc;

    if (empty($ids))
        $smcFunc['db_query']('truncate_table', '
            TRUNCATE {db_prefix}log_banned',
            array(
            )
        );
    else
    {
        if (!is_array($ids))
            $ids = array($ids);

        $ids = array_unique($ids);

        if (empty($ids))
            return false;

        $smcFunc['db_query']('', '
            DELETE FROM {db_prefix}log_banned
            WHERE id_ban_log IN ({array_int:ban_list})',
            array(
                'ban_list' => $ids,
            )
        );
    }

    return true;
}

/**
 * This function validates the ban triggers
 *
 * Errors in $context['ban_errors']
 *
 * @param array $triggers The triggers to validate
 * @return array An array of riggers and log info ready to be used
 */
function validateTriggers(&$triggers)
{
    global $context, $smcFunc;

    if (empty($triggers))
        $context['ban_erros'][] = 'ban_empty_triggers';

    $ban_triggers = array();
    $log_info = array();

    foreach ($triggers as $key => $value)
    {
        if (!empty($value))
        {
            if ($key == 'member')
                continue;

            if ($key == 'main_ip')
            {
                $value = trim($value);
                $ip_parts = ip2range($value);
                if (!checkExistingTriggerIP($ip_parts, $value))
                    $context['ban_erros'][] = 'invalid_ip';
                else
                {
                    $ban_triggers['main_ip'] = array(
                        'ip_low' => $ip_parts['low'],
                        'ip_high' => $ip_parts['high']
                    );
                }
            }
            elseif ($key == 'hostname')
            {
                if (preg_match('/[^\w.\-*]/', $value) == 1)
                    $context['ban_erros'][] = 'invalid_hostname';
                else
                {
                    // Replace the * wildcard by a MySQL wildcard %.
                    $value = substr(str_replace('*', '%', $value), 0, 255);

                    $ban_triggers['hostname']['hostname'] = $value;
                }
            }
            elseif ($key == 'email')
            {
                if (preg_match('/[^\w.\-\+*@]/', $value) == 1)
                    $context['ban_erros'][] = 'invalid_email';

                // Check the user is not banning an admin.
                $request = $smcFunc['db_query']('', '
                    SELECT id_member
                    FROM {db_prefix}members
                    WHERE (id_group = {int:admin_group} OR FIND_IN_SET({int:admin_group}, additional_groups) != 0)
                        AND email_address LIKE {string:email}
                    LIMIT 1',
                    array(
                        'admin_group' => 1,
                        'email' => $value,
                    )
                );
                if ($smcFunc['db_num_rows']($request) != 0)
                    $context['ban_erros'][] = 'no_ban_admin';
                $smcFunc['db_free_result']($request);

                $value = substr(strtolower(str_replace('*', '%', $value)), 0, 255);

                $ban_triggers['email']['email_address'] = $value;
            }
            elseif ($key == 'user')
            {
                $user = preg_replace('~&amp;#(\d{4,5}|[2-9]\d{2,4}|1[2-9]\d);~', '&#$1;', $smcFunc['htmlspecialchars']($value, ENT_QUOTES));

                $request = $smcFunc['db_query']('', '
                    SELECT id_member, (id_group = {int:admin_group} OR FIND_IN_SET({int:admin_group}, additional_groups) != 0) AS isAdmin
                    FROM {db_prefix}members
                    WHERE member_name = {string:username} OR real_name = {string:username}
                    LIMIT 1',
                    array(
                        'admin_group' => 1,
                        'username' => $user,
                    )
                );
                if ($smcFunc['db_num_rows']($request) == 0)
                    $context['ban_erros'][] = 'invalid_username';
                list ($value, $isAdmin) = $smcFunc['db_fetch_row']($request);
                $smcFunc['db_free_result']($request);

                if ($isAdmin && strtolower($isAdmin) != 'f')
                {
                    unset($value);
                    $context['ban_erros'][] = 'no_ban_admin';
                }
                else
                    $ban_triggers['user']['id_member'] = $value;
            }
            elseif (in_array($key, array('ips_in_messages', 'ips_in_errors')))
            {
                // Special case, those two are arrays themselves
                $values = array_unique($value);
                // Don't add the main IP again.
                if (isset($triggers['main_ip']))
                    $values = array_diff($values, array($triggers['main_ip']));
                unset($value);
                foreach ($values as $val)
                {
                    $val = trim($val);
                    $ip_parts = ip2range($val);
                    if (!checkExistingTriggerIP($ip_parts, $val))
                        $context['ban_erros'][] = 'invalid_ip';
                    else
                    {
                        $ban_triggers[$key][] = array(
                            'ip_low' => $ip_parts['low'],
                            'ip_high' => $ip_parts['high'],
                        );

                        $log_info[] = array(
                            'value' => $val,
                            'bantype' => 'ip_range',
                        );
                    }
                }
            }
            else
                $context['ban_erros'][] = 'no_bantype_selected';

            if (isset($value) && !is_array($value))
                $log_info[] = array(
                    'value' => $value,
                    'bantype' => $key,
                );
        }
    }
    return array('ban_triggers' => $ban_triggers, 'log_info' => $log_info);
}

/**
 * This function actually inserts the ban triggers into the database
 *
 * Errors in $context['ban_errors']
 *
 * @param int $group_id The ID of the group to add the triggers to (0 to create a new one)
 * @param array $triggers The triggers to add
 * @param array $logs The log data
 * @return bool Whether or not the action was successful
 */
function addTriggers($group_id = 0, $triggers = array(), $logs = array())
{
    global $smcFunc, $context;

    if (empty($group_id))
        $context['ban_errors'][] = 'ban_id_empty';

    // Preset all values that are required.
    $values = array(
        'id_ban_group' => $group_id,
        'hostname' => '',
        'email_address' => '',
        'id_member' => 0,
        'ip_low' => 'null',
        'ip_high' => 'null',
    );

    $insertKeys = array(
        'id_ban_group' => 'int',
        'hostname' => 'string',
        'email_address' => 'string',
        'id_member' => 'int',
        'ip_low' => 'inet',
        'ip_high' => 'inet',
    );

    $insertTriggers = array();
    foreach ($triggers as $key => $trigger)
    {
        // Exceptions, exceptions, exceptions...always exceptions... :P
        if (in_array($key, array('ips_in_messages', 'ips_in_errors')))
            foreach ($trigger as $real_trigger)
                $insertTriggers[] = array_merge($values, $real_trigger);
        else
            $insertTriggers[] = array_merge($values, $trigger);
    }

    if (empty($insertTriggers))
        $context['ban_errors'][] = 'ban_no_triggers';

    if (!empty($context['ban_errors']))
        return false;

    $smcFunc['db_insert']('',
        '{db_prefix}ban_items',
        $insertKeys,
        $insertTriggers,
        array('id_ban')
    );

    logTriggersUpdates($logs, true);

    return true;
}

/**
 * This function updates an existing ban trigger into the database
 *
 * Errors in $context['ban_errors']
 *
 * @param int $ban_item The ID of the ban item
 * @param int $group_id The ID of the ban group
 * @param array $trigger An array of triggers
 * @param array $logs An array of log info
 */
function updateTriggers($ban_item = 0, $group_id = 0, $trigger = array(), $logs = array())
{
    global $smcFunc, $context;

    if (empty($ban_item))
        $context['ban_errors'][] = 'ban_ban_item_empty';
    if (empty($group_id))
        $context['ban_errors'][] = 'ban_id_empty';
    if (empty($trigger))
        $context['ban_errors'][] = 'ban_no_triggers';

    if (!empty($context['ban_errors']))
        return;

    // Preset all values that are required.
    $values = array(
        'id_ban_group' => $group_id,
        'hostname' => '',
        'email_address' => '',
        'id_member' => 0,
        'ip_low' => 'null',
        'ip_high' => 'null',
    );

    $trigger = array_merge($values, $trigger);

    $smcFunc['db_query']('', '
        UPDATE {db_prefix}ban_items
        SET
            hostname = {string:hostname}, email_address = {string:email_address}, id_member = {int:id_member},
            ip_low = {inet:ip_low}, ip_high = {inet:ip_high}
        WHERE id_ban = {int:ban_item}
            AND id_ban_group = {int:id_ban_group}',
        array_merge($trigger, array(
            'id_ban_group' => $group_id,
            'ban_item' => $ban_item,
        ))
    );

    logTriggersUpdates($logs, false);
}

/**
 * A small function to unify logging of triggers (updates and new)
 *
 * @param array $logs an array of logs, each log contains the following keys:
 *                - bantype: a known type of ban (ip_range, hostname, email, user, main_ip)
 *                - value: the value of the bantype (e.g. the IP or the email address banned)
 * @param bool $new Whether the trigger is new or an update of an existing one
 * @param bool $removal Whether the trigger is being deleted
 */
function logTriggersUpdates($logs, $new = true, $removal = false)
{
    if (empty($logs))
        return;

    $log_name_map = array(
        'main_ip' => 'ip_range',
        'hostname' => 'hostname',
        'email' => 'email',
        'user' => 'member',
        'ip_range' => 'ip_range',
    );

    // Log the addion of the ban entries into the moderation log.
    foreach ($logs as $log)
        logAction('ban' . ($removal == true ? 'remove' : ''), array(
            $log_name_map[$log['bantype']] => $log['value'],
            'new' => empty($new) ? 0 : 1,
            'remove' => empty($removal) ? 0 : 1,
            'type' => $log['bantype'],
        ));
}

/**
 * Updates an existing ban group
 *
 * Errors in $context['ban_errors']
 *
 * @param array $ban_info An array of info about the ban group. Should have name and may also have an id.
 * @return int The ban group's ID
 */
function updateBanGroup($ban_info = array())
{
    global $smcFunc, $context;

    if (empty($ban_info['name']))
        $context['ban_errors'][] = 'ban_name_empty';
    if (empty($ban_info['id']))
        $context['ban_errors'][] = 'ban_id_empty';
    if (empty($ban_info['cannot']['access']) && empty($ban_info['cannot']['register']) && empty($ban_info['cannot']['post']) && empty($ban_info['cannot']['login']))
        $context['ban_errors'][] = 'ban_unknown_restriction_type';

    if (!empty($ban_info['id']))
    {
        // Verify the ban group exists.
        $request = $smcFunc['db_query']('', '
            SELECT id_ban_group
            FROM {db_prefix}ban_groups
            WHERE id_ban_group = {int:ban_group}
            LIMIT 1',
            array(
                'ban_group' => $ban_info['id']
            )
        );

        if ($smcFunc['db_num_rows']($request) == 0)
            $context['ban_errors'][] = 'ban_not_found';
        $smcFunc['db_free_result']($request);
    }

    if (!empty($ban_info['name']))
    {
        // Make sure the name does not already exist (Of course, if it exists in the ban group we are editing, proceed.)
        $request = $smcFunc['db_query']('', '
            SELECT id_ban_group
            FROM {db_prefix}ban_groups
            WHERE name = {string:new_ban_name}
                AND id_ban_group != {int:ban_group}
            LIMIT 1',
            array(
                'ban_group' => empty($ban_info['id']) ? 0 : $ban_info['id'],
                'new_ban_name' => $ban_info['name'],
            )
        );
        if ($smcFunc['db_num_rows']($request) != 0)
            $context['ban_errors'][] = 'ban_name_exists';
        $smcFunc['db_free_result']($request);
    }

    if (!empty($context['ban_errors']))
        return $ban_info['id'];

    $smcFunc['db_query']('', '
        UPDATE {db_prefix}ban_groups
        SET
            name = {string:ban_name},
            reason = {string:reason},
            notes = {string:notes},
            expire_time = {raw:expiration},
            cannot_access = {int:cannot_access},
            cannot_post = {int:cannot_post},
            cannot_register = {int:cannot_register},
            cannot_login = {int:cannot_login}
        WHERE id_ban_group = {int:id_ban_group}',
        array(
            'expiration' => $ban_info['db_expiration'],
            'cannot_access' => $ban_info['cannot']['access'],
            'cannot_post' => $ban_info['cannot']['post'],
            'cannot_register' => $ban_info['cannot']['register'],
            'cannot_login' => $ban_info['cannot']['login'],
            'id_ban_group' => $ban_info['id'],
            'ban_name' => $ban_info['name'],
            'reason' => $ban_info['reason'],
            'notes' => $ban_info['notes'],
        )
    );

    return $ban_info['id'];
}

/**
 * Creates a new ban group
 * If the group is successfully created the ID is returned
 * On error the error code is returned or false
 *
 * Errors in $context['ban_errors']
 *
 * @param array $ban_info An array containing 'name', which is the name of the ban group
 * @return int The ban group's ID
 */
function insertBanGroup($ban_info = array())
{
    global $smcFunc, $context;

    if (empty($ban_info['name']))
        $context['ban_errors'][] = 'ban_name_empty';
    if (empty($ban_info['cannot']['access']) && empty($ban_info['cannot']['register']) && empty($ban_info['cannot']['post']) && empty($ban_info['cannot']['login']))
        $context['ban_errors'][] = 'ban_unknown_restriction_type';

    if (!empty($ban_info['name']))
    {
        // Check whether a ban with this name already exists.
        $request = $smcFunc['db_query']('', '
            SELECT id_ban_group
            FROM {db_prefix}ban_groups
            WHERE name = {string:new_ban_name}' . '
            LIMIT 1',
            array(
                'new_ban_name' => $ban_info['name'],
            )
        );

        if ($smcFunc['db_num_rows']($request) == 1)
            $context['ban_errors'][] = 'ban_name_exists';
        $smcFunc['db_free_result']($request);
    }

    if (!empty($context['ban_errors']))
        return;

    // Yes yes, we're ready to add now.
    $ban_info['id'] = $smcFunc['db_insert']('',
        '{db_prefix}ban_groups',
        array(
            'name' => 'string-20', 'ban_time' => 'int', 'expire_time' => 'raw', 'cannot_access' => 'int', 'cannot_register' => 'int',
            'cannot_post' => 'int', 'cannot_login' => 'int', 'reason' => 'string-255', 'notes' => 'string-65534',
        ),
        array(
            $ban_info['name'], time(), $ban_info['db_expiration'], $ban_info['cannot']['access'], $ban_info['cannot']['register'],
            $ban_info['cannot']['post'], $ban_info['cannot']['login'], $ban_info['reason'], $ban_info['notes'],
        ),
        array('id_ban_group'),
        1
    );

    if (empty($ban_info['id']))
        $context['ban_errors'][] = 'impossible_insert_new_bangroup';

    return $ban_info['id'];
}

/**
 * This function handles the ins and outs of the screen for adding new ban
 * triggers or modifying existing ones.
 * Adding new ban triggers:
 *  - is accessed by ?action=admin;area=ban;sa=edittrigger;bg=x
 *  - uses the ban_edit_trigger sub template of ManageBans.
 * Editing existing ban triggers:
 *  - is accessed by ?action=admin;area=ban;sa=edittrigger;bg=x;bi=y
 *  - uses the ban_edit_trigger sub template of ManageBans.
 */
function BanEditTrigger()
{
    global $context, $smcFunc, $scripturl;

    $context['sub_template'] = 'ban_edit_trigger';
    $context['form_url'] = $scripturl . '?action=admin;area=ban;sa=edittrigger';

    $ban_group = isset($_REQUEST['bg']) ? (int) $_REQUEST['bg'] : 0;
    $ban_id = isset($_REQUEST['bi']) ? (int) $_REQUEST['bi'] : 0;

    if (empty($ban_group))
        fatal_lang_error('ban_not_found', false);

    if (isset($_POST['add_new_trigger']) && !empty($_POST['ban_suggestions']))
    {
        saveTriggers($_POST['ban_suggestions'], $ban_group, 0, $ban_id);
        redirectexit('action=admin;area=ban;sa=edit' . (!empty($ban_group) ? ';bg=' . $ban_group : ''));
    }
    elseif (isset($_POST['edit_trigger']) && !empty($_POST['ban_suggestions']))
    {
        // The first replaces the old one, the others are added new (simplification, otherwise it would require another query and some work...)
        saveTriggers(array_shift($_POST['ban_suggestions']), $ban_group, 0, $ban_id);
        if (!empty($_POST['ban_suggestions']))
            saveTriggers($_POST['ban_suggestions'], $ban_group);

        redirectexit('action=admin;area=ban;sa=edit' . (!empty($ban_group) ? ';bg=' . $ban_group : ''));
    }
    elseif (isset($_POST['edit_trigger']))
    {
        removeBanTriggers($ban_id);
        redirectexit('action=admin;area=ban;sa=edit' . (!empty($ban_group) ? ';bg=' . $ban_group : ''));
    }

    loadJavaScriptFile('suggest.js', array('minimize' => true), 'smf_suggest');

    if (empty($ban_id))
    {
        $context['ban_trigger'] = array(
            'id' => 0,
            'group' => $ban_group,
            'ip' => array(
                'value' => '',
                'selected' => true,
            ),
            'hostname' => array(
                'selected' => false,
                'value' => '',
            ),
            'email' => array(
                'value' => '',
                'selected' => false,
            ),
            'banneduser' => array(
                'value' => '',
                'selected' => false,
            ),
            'is_new' => true,
        );
    }
    else
    {
        $request = $smcFunc['db_query']('', '
            SELECT
                bi.id_ban, bi.id_ban_group, bi.hostname, bi.email_address, bi.id_member,
                bi.ip_low, bi.ip_high,
                mem.member_name, mem.real_name
            FROM {db_prefix}ban_items AS bi
                LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)
            WHERE bi.id_ban = {int:ban_item}
                AND bi.id_ban_group = {int:ban_group}
            LIMIT 1',
            array(
                'ban_item' => $ban_id,
                'ban_group' => $ban_group,
            )
        );
        if ($smcFunc['db_num_rows']($request) == 0)
            fatal_lang_error('ban_not_found', false);
        $row = $smcFunc['db_fetch_assoc']($request);
        $smcFunc['db_free_result']($request);

        $context['ban_trigger'] = array(
            'id' => $row['id_ban'],
            'group' => $row['id_ban_group'],
            'ip' => array(
                'value' => empty($row['ip_low']) ? '' : range2ip($row['ip_low'], $row['ip_high']),
                'selected' => !empty($row['ip_low']),
            ),
            'hostname' => array(
                'value' => str_replace('%', '*', $row['hostname']),
                'selected' => !empty($row['hostname']),
            ),
            'email' => array(
                'value' => str_replace('%', '*', $row['email_address']),
                'selected' => !empty($row['email_address'])
            ),
            'banneduser' => array(
                'value' => $row['member_name'],
                'selected' => !empty($row['member_name'])
            ),
            'is_new' => false,
        );
    }

    createToken('admin-bet');
}

/**
 * This handles the screen for showing the banned entities
 * It is accessed by ?action=admin;area=ban;sa=browse
 * It uses sub-tabs for browsing by IP, hostname, email or username.
 *
 * uses ManageBans template, browse_triggers sub template.
 */
function BanBrowseTriggers()
{
    global $modSettings, $context, $scripturl, $smcFunc, $txt;
    global $sourcedir, $settings;

    if (!empty($_POST['remove_triggers']) && !empty($_POST['remove']) && is_array($_POST['remove']))
    {
        checkSession();

        removeBanTriggers($_POST['remove']);

        // Rehabilitate some members.
        if ($_REQUEST['entity'] == 'member')
            updateBanMembers();

        // Make sure the ban cache is refreshed.
        updateSettings(array('banLastUpdated' => time()));
    }

    $context['selected_entity'] = isset($_REQUEST['entity']) && in_array($_REQUEST['entity'], array('ip', 'hostname', 'email', 'member')) ? $_REQUEST['entity'] : 'ip';

    $listOptions = array(
        'id' => 'ban_trigger_list',
        'title' => $txt['ban_trigger_browse'],
        'items_per_page' => $modSettings['defaultMaxListItems'],
        'base_href' => $scripturl . '?action=admin;area=ban;sa=browse;entity=' . $context['selected_entity'],
        'default_sort_col' => 'banned_entity',
        'no_items_label' => $txt['ban_no_triggers'],
        'get_items' => array(
            'function' => 'list_getBanTriggers',
            'params' => array(
                $context['selected_entity'],
            ),
        ),
        'get_count' => array(
            'function' => 'list_getNumBanTriggers',
            'params' => array(
                $context['selected_entity'],
            ),
        ),
        'columns' => array(
            'banned_entity' => array(
                'header' => array(
                    'value' => $txt['ban_banned_entity'],
                ),
            ),
            'ban_name' => array(
                'header' => array(
                    'value' => $txt['ban_name'],
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<a href="' . $scripturl . '?action=admin;area=ban;sa=edit;bg=%1$d">%2$s</a>',
                        'params' => array(
                            'id_ban_group' => false,
                            'name' => false,
                        ),
                    ),
                ),
                'sort' => array(
                    'default' => 'bg.name',
                    'reverse' => 'bg.name DESC',
                ),
            ),
            'hits' => array(
                'header' => array(
                    'value' => $txt['ban_hits'],
                ),
                'data' => array(
                    'db' => 'hits',
                ),
                'sort' => array(
                    'default' => 'bi.hits DESC',
                    'reverse' => 'bi.hits',
                ),
            ),
            'check' => array(
                'header' => array(
                    'value' => '<input type="checkbox" onclick="invertAll(this, this.form);">',
                    'class' => 'centercol',
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<input type="checkbox" name="remove[]" value="%1$d">',
                        'params' => array(
                            'id_ban' => false,
                        ),
                    ),
                    'class' => 'centercol',
                ),
            ),
        ),
        'form' => array(
            'href' => $scripturl . '?action=admin;area=ban;sa=browse;entity=' . $context['selected_entity'],
            'include_start' => true,
            'include_sort' => true,
        ),
        'additional_rows' => array(
            array(
                'position' => 'above_column_headers',
                'value' => '<a href="' . $scripturl . '?action=admin;area=ban;sa=browse;entity=ip">' . ($context['selected_entity'] == 'ip' ? '<img src="' . $settings['images_url'] . '/selected.png" alt="&gt;"> ' : '') . $txt['ip'] . '</a>&nbsp;|&nbsp;<a href="' . $scripturl . '?action=admin;area=ban;sa=browse;entity=hostname">' . ($context['selected_entity'] == 'hostname' ? '<img src="' . $settings['images_url'] . '/selected.png" alt="&gt;"> ' : '') . $txt['hostname'] . '</a>&nbsp;|&nbsp;<a href="' . $scripturl . '?action=admin;area=ban;sa=browse;entity=email">' . ($context['selected_entity'] == 'email' ? '<img src="' . $settings['images_url'] . '/selected.png" alt="&gt;"> ' : '') . $txt['email'] . '</a>&nbsp;|&nbsp;<a href="' . $scripturl . '?action=admin;area=ban;sa=browse;entity=member">' . ($context['selected_entity'] == 'member' ? '<img src="' . $settings['images_url'] . '/selected.png" alt="&gt;"> ' : '') . $txt['username'] . '</a>',
            ),
            array(
                'position' => 'bottom_of_list',
                'value' => '<input type="submit" name="remove_triggers" value="' . $txt['ban_remove_selected_triggers'] . '" data-confirm="' . $txt['ban_remove_selected_triggers_confirm'] . '" class="button you_sure">',
            ),
        ),
    );

    // Specific data for the first column depending on the selected entity.
    if ($context['selected_entity'] === 'ip')
    {
        $listOptions['columns']['banned_entity']['data'] = array(
            'function' => function($rowData)
            {
                return range2ip(
                    $rowData['ip_low']
                    ,
                    $rowData['ip_high']
                );
            },
        );
        $listOptions['columns']['banned_entity']['sort'] = array(
            'default' => 'bi.ip_low, bi.ip_high, bi.ip_low',
            'reverse' => 'bi.ip_low DESC, bi.ip_high DESC',
        );
    }
    elseif ($context['selected_entity'] === 'hostname')
    {
        $listOptions['columns']['banned_entity']['data'] = array(
            'function' => function($rowData) use ($smcFunc)
            {
                return strtr($smcFunc['htmlspecialchars']($rowData['hostname']), array('%' => '*'));
            },
        );
        $listOptions['columns']['banned_entity']['sort'] = array(
            'default' => 'bi.hostname',
            'reverse' => 'bi.hostname DESC',
        );
    }
    elseif ($context['selected_entity'] === 'email')
    {
        $listOptions['columns']['banned_entity']['data'] = array(
            'function' => function($rowData) use ($smcFunc)
            {
                return strtr($smcFunc['htmlspecialchars']($rowData['email_address']), array('%' => '*'));
            },
        );
        $listOptions['columns']['banned_entity']['sort'] = array(
            'default' => 'bi.email_address',
            'reverse' => 'bi.email_address DESC',
        );
    }
    elseif ($context['selected_entity'] === 'member')
    {
        $listOptions['columns']['banned_entity']['data'] = array(
            'sprintf' => array(
                'format' => '<a href="' . $scripturl . '?action=profile;u=%1$d">%2$s</a>',
                'params' => array(
                    'id_member' => false,
                    'real_name' => false,
                ),
            ),
        );
        $listOptions['columns']['banned_entity']['sort'] = array(
            'default' => 'mem.real_name',
            'reverse' => 'mem.real_name DESC',
        );
    }

    // Create the list.
    require_once($sourcedir . '/Subs-List.php');
    createList($listOptions);

    // The list is the only thing to show, so make it the default sub template.
    $context['sub_template'] = 'show_list';
    $context['default_list'] = 'ban_trigger_list';
}

/**
 * Get ban triggers for the given parameters. Callback from $listOptions['get_items'] in BanBrowseTriggers()
 *
 * @param int $start The item to start with (for pagination purposes)
 * @param int $items_per_page How many items to show on each page
 * @param string $sort A string telling ORDER BY how to sort the results
 * @param string $trigger_type The trigger type - can be 'ip', 'hostname' or 'email'
 * @return array An array of ban trigger info for the list
 */
function list_getBanTriggers($start, $items_per_page, $sort, $trigger_type)
{
    global $smcFunc;

    $where = array(
        'ip' => 'bi.ip_low is not null',
        'hostname' => 'bi.hostname != {string:blank_string}',
        'email' => 'bi.email_address != {string:blank_string}',
    );

    $request = $smcFunc['db_query']('', '
        SELECT
            bi.id_ban, bi.ip_low, bi.ip_high, bi.hostname, bi.email_address, bi.hits,
            bg.id_ban_group, bg.name' . ($trigger_type === 'member' ? ',
            mem.id_member, mem.real_name' : '') . '
        FROM {db_prefix}ban_items AS bi
            INNER JOIN {db_prefix}ban_groups AS bg ON (bg.id_ban_group = bi.id_ban_group)' . ($trigger_type === 'member' ? '
            INNER JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)' : '
        WHERE ' . $where[$trigger_type]) . '
        ORDER BY {raw:sort}
        LIMIT {int:start}, {int:max}',
        array(
            'blank_string' => '',
            'sort' => $sort,
            'start' => $start,
            'max' => $items_per_page,
        )
    );
    $ban_triggers = array();
    while ($row = $smcFunc['db_fetch_assoc']($request))
        $ban_triggers[] = $row;
    $smcFunc['db_free_result']($request);

    return $ban_triggers;
}

/**
 * This returns the total number of ban triggers of the given type. Callback for $listOptions['get_count'] in BanBrowseTriggers().
 *
 * @param string $trigger_type The trigger type. Can be 'ip', 'hostname' or 'email'
 * @return int The number of triggers of the specified type
 */
function list_getNumBanTriggers($trigger_type)
{
    global $smcFunc;

    $where = array(
        'ip' => 'bi.ip_low is not null',
        'hostname' => 'bi.hostname != {string:blank_string}',
        'email' => 'bi.email_address != {string:blank_string}',
    );

    $request = $smcFunc['db_query']('', '
        SELECT COUNT(*)
        FROM {db_prefix}ban_items AS bi' . ($trigger_type === 'member' ? '
            INNER JOIN {db_prefix}members AS mem ON (mem.id_member = bi.id_member)' : '
        WHERE ' . $where[$trigger_type]),
        array(
            'blank_string' => '',
        )
    );
    list ($num_triggers) = $smcFunc['db_fetch_row']($request);
    $smcFunc['db_free_result']($request);

    return $num_triggers;
}

/**
 * This handles the listing of ban log entries, and allows their deletion.
 * Shows a list of logged access attempts by banned users.
 * It is accessed by ?action=admin;area=ban;sa=log.
 * How it works:
 *  - allows sorting of several columns.
 *  - also handles deletion of (a selection of) log entries.
 */
function BanLog()
{
    global $scripturl, $context, $sourcedir, $txt, $modSettings;

    // Delete one or more entries.
    if (!empty($_POST['removeAll']) || (!empty($_POST['removeSelected']) && !empty($_POST['remove'])))
    {
        checkSession();
        validateToken('admin-bl');

        // 'Delete all entries' button was pressed.
        if (!empty($_POST['removeAll']))
            removeBanLogs();
        // 'Delete selection' button was pressed.
        else
        {
            array_map('intval', $_POST['remove']);
            removeBanLogs($_POST['remove']);
        }
    }

    $listOptions = array(
        'id' => 'ban_log',
        'title' => $txt['ban_log'],
        'items_per_page' => $modSettings['defaultMaxListItems'],
        'base_href' => $context['admin_area'] == 'ban' ? $scripturl . '?action=admin;area=ban;sa=log' : $scripturl . '?action=admin;area=logs;sa=banlog',
        'default_sort_col' => 'date',
        'get_items' => array(
            'function' => 'list_getBanLogEntries',
        ),
        'get_count' => array(
            'function' => 'list_getNumBanLogEntries',
        ),
        'no_items_label' => $txt['ban_log_no_entries'],
        'columns' => array(
            'ip' => array(
                'header' => array(
                    'value' => $txt['ban_log_ip'],
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<a href="' . $scripturl . '?action=trackip;searchip=%1$s">%1$s</a>',
                        'params' => array(
                            'ip' => false,
                        ),
                    ),
                ),
                'sort' => array(
                    'default' => 'lb.ip',
                    'reverse' => 'lb.ip DESC',
                ),
            ),
            'email' => array(
                'header' => array(
                    'value' => $txt['ban_log_email'],
                ),
                'data' => array(
                    'db_htmlsafe' => 'email',
                ),
                'sort' => array(
                    'default' => 'lb.email = \'\', lb.email',
                    'reverse' => 'lb.email != \'\', lb.email DESC',
                ),
            ),
            'member' => array(
                'header' => array(
                    'value' => $txt['ban_log_member'],
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<a href="' . $scripturl . '?action=profile;u=%1$d">%2$s</a>',
                        'params' => array(
                            'id_member' => false,
                            'real_name' => false,
                        ),
                    ),
                ),
                'sort' => array(
                    'default' => 'COALESCE(mem.real_name, 1=1), mem.real_name',
                    'reverse' => 'COALESCE(mem.real_name, 1=1) DESC, mem.real_name DESC',
                ),
            ),
            'date' => array(
                'header' => array(
                    'value' => $txt['ban_log_date'],
                ),
                'data' => array(
                    'function' => function($rowData)
                    {
                        return timeformat($rowData['log_time']);
                    },
                ),
                'sort' => array(
                    'default' => 'lb.log_time DESC',
                    'reverse' => 'lb.log_time',
                ),
            ),
            'check' => array(
                'header' => array(
                    'value' => '<input type="checkbox" onclick="invertAll(this, this.form);">',
                    'class' => 'centercol',
                ),
                'data' => array(
                    'sprintf' => array(
                        'format' => '<input type="checkbox" name="remove[]" value="%1$d">',
                        'params' => array(
                            'id_ban_log' => false,
                        ),
                    ),
                    'class' => 'centercol',
                ),
            ),
        ),
        'form' => array(
            'href' => $context['admin_area'] == 'ban' ? $scripturl . '?action=admin;area=ban;sa=log' : $scripturl . '?action=admin;area=logs;sa=banlog',
            'include_start' => true,
            'include_sort' => true,
            'token' => 'admin-bl',
        ),
        'additional_rows' => array(
            array(
                'position' => 'top_of_list',
                'value' => '
                    <input type="submit" name="removeSelected" value="' . $txt['ban_log_remove_selected'] . '" data-confirm="' . $txt['ban_log_remove_selected_confirm'] . '" class="button you_sure">
                    <input type="submit" name="removeAll" value="' . $txt['ban_log_remove_all'] . '" data-confirm="' . $txt['ban_log_remove_all_confirm'] . '" class="button you_sure">',
            ),
            array(
                'position' => 'bottom_of_list',
                'value' => '
                    <input type="submit" name="removeSelected" value="' . $txt['ban_log_remove_selected'] . '" data-confirm="' . $txt['ban_log_remove_selected_confirm'] . '" class="button you_sure">
                    <input type="submit" name="removeAll" value="' . $txt['ban_log_remove_all'] . '" data-confirm="' . $txt['ban_log_remove_all_confirm'] . '" class="button you_sure">',
            ),
        ),
    );

    createToken('admin-bl');

    require_once($sourcedir . '/Subs-List.php');
    createList($listOptions);

    $context['page_title'] = $txt['ban_log'];
    $context['sub_template'] = 'show_list';
    $context['default_list'] = 'ban_log';
}

/**
 * Load a list of ban log entries from the database.
 * (no permissions check). Callback for $listOptions['get_items'] in BanLog()
 *
 * @param int $start The item to start with (for pagination purposes)
 * @param int $items_per_page How many items to show on each page
 * @param string $sort A string telling ORDER BY how to sort the results
 * @return array An array of info about the ban log entries for the list.
 */
function list_getBanLogEntries($start, $items_per_page, $sort)
{
    global $smcFunc;

    $dash = '-';

    $request = $smcFunc['db_query']('', '
        SELECT lb.id_ban_log, lb.id_member, lb.ip AS ip, COALESCE(lb.email, {string:dash}) AS email, lb.log_time, COALESCE(mem.real_name, {string:blank_string}) AS real_name
        FROM {db_prefix}log_banned AS lb
            LEFT JOIN {db_prefix}members AS mem ON (mem.id_member = lb.id_member)
        ORDER BY {raw:sort}
        LIMIT {int:start}, {int:items}',
        array(
            'blank_string' => '',
            'dash' => $dash,
            'sort' => $sort,
            'start' => $start,
            'items' => $items_per_page,
        )
    );
    $log_entries = array();
    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        $row['ip'] = $row['ip'] === null ? $dash : inet_dtop($row['ip']);
        $log_entries[] = $row;
    }
    $smcFunc['db_free_result']($request);

    return $log_entries;
}

/**
 * This returns the total count of ban log entries. Callback for $listOptions['get_count'] in BanLog().
 *
 * @return int The total number of ban log entries.
 */
function list_getNumBanLogEntries()
{
    global $smcFunc;

    $request = $smcFunc['db_query']('', '
        SELECT COUNT(*)
        FROM {db_prefix}log_banned AS lb',
        array(
        )
    );
    list ($num_entries) = $smcFunc['db_fetch_row']($request);
    $smcFunc['db_free_result']($request);

    return $num_entries;
}

/**
 * Convert a range of given IP number into a single string.
 * It's practically the reverse function of ip2range().
 *
 * @example
 * range2ip(array(10, 10, 10, 0), array(10, 10, 20, 255)) returns '10.10.10-20.*
 *
 * @param array $low The low end of the range in IPv4 format
 * @param array $high The high end of the range in IPv4 format
 * @return string A string indicating the range
 */
function range2ip($low, $high)
{
    $low = inet_dtop($low);
    $high = inet_dtop($high);

    if ($low == '255.255.255.255') return 'unknown';
    if ($low == $high)
        return $low;
    else
        return $low . '-' . $high;
}

/**
 * Checks whether a given IP range already exists in the trigger list.
 * If yes, it returns an error message. Otherwise, it returns an array
 *  optimized for the database.
 *
 * @param array $ip_array An array of IP trigger data
 * @param string $fullip The full IP
 * @return boolean|array False if the trigger array is invalid or the passed array if the value doesn't exist in the database
 */
function checkExistingTriggerIP($ip_array, $fullip = '')
{
    global $smcFunc, $scripturl;

    $values = array(
        'ip_low' => $ip_array['low'],
        'ip_high' => $ip_array['high']
    );

    $request = $smcFunc['db_query']('', '
        SELECT bg.id_ban_group, bg.name
        FROM {db_prefix}ban_groups AS bg
        INNER JOIN {db_prefix}ban_items AS bi ON
            (bi.id_ban_group = bg.id_ban_group)
            AND ip_low = {inet:ip_low} AND ip_high = {inet:ip_high}
        LIMIT 1',
        $values
    );
    if ($smcFunc['db_num_rows']($request) != 0)
    {
        list ($error_id_ban, $error_ban_name) = $smcFunc['db_fetch_row']($request);
        fatal_lang_error('ban_trigger_already_exists', false, array(
            $fullip,
            '<a href="' . $scripturl . '?action=admin;area=ban;sa=edit;bg=' . $error_id_ban . '">' . $error_ban_name . '</a>',
        ));
    }
    $smcFunc['db_free_result']($request);

    return $values;
}

/**
 * As it says... this tries to review the list of banned members, to match new bans.
 * Note: is_activated >= 10: a member is banned.
 */
function updateBanMembers()
{
    global $smcFunc;

    $updates = array();
    $allMembers = array();
    $newMembers = array();

    // Start by getting all active bans - it's quicker doing this in parts...
    $request = $smcFunc['db_query']('', '
        SELECT bi.id_member, bi.email_address
        FROM {db_prefix}ban_items AS bi
            INNER JOIN {db_prefix}ban_groups AS bg ON (bg.id_ban_group = bi.id_ban_group)
        WHERE (bi.id_member > {int:no_member} OR bi.email_address != {string:blank_string})
            AND bg.cannot_access = {int:cannot_access_on}
            AND (bg.expire_time IS NULL OR bg.expire_time > {int:current_time})',
        array(
            'no_member' => 0,
            'cannot_access_on' => 1,
            'current_time' => time(),
            'blank_string' => '',
        )
    );
    $memberIDs = array();
    $memberEmails = array();
    $memberEmailWild = array();
    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        if ($row['id_member'])
            $memberIDs[$row['id_member']] = $row['id_member'];
        if ($row['email_address'])
        {
            // Does it have a wildcard - if so we can't do a IN on it.
            if (strpos($row['email_address'], '%') !== false)
                $memberEmailWild[$row['email_address']] = $row['email_address'];
            else
                $memberEmails[$row['email_address']] = $row['email_address'];
        }
    }
    $smcFunc['db_free_result']($request);

    // Build up the query.
    $queryPart = array();
    $queryValues = array();
    if (!empty($memberIDs))
    {
        $queryPart[] = 'mem.id_member IN ({array_string:member_ids})';
        $queryValues['member_ids'] = $memberIDs;
    }
    if (!empty($memberEmails))
    {
        $queryPart[] = 'mem.email_address IN ({array_string:member_emails})';
        $queryValues['member_emails'] = $memberEmails;
    }
    $count = 0;
    foreach ($memberEmailWild as $email)
    {
        $queryPart[] = 'mem.email_address LIKE {string:wild_' . $count . '}';
        $queryValues['wild_' . $count++] = $email;
    }

    // Find all banned members.
    if (!empty($queryPart))
    {
        $request = $smcFunc['db_query']('', '
            SELECT mem.id_member, mem.is_activated
            FROM {db_prefix}members AS mem
            WHERE ' . implode(' OR ', $queryPart),
            $queryValues
        );
        while ($row = $smcFunc['db_fetch_assoc']($request))
        {
            if (!in_array($row['id_member'], $allMembers))
            {
                $allMembers[] = $row['id_member'];
                // Do they need an update?
                if ($row['is_activated'] < 10)
                {
                    $updates[($row['is_activated'] + 10)][] = $row['id_member'];
                    $newMembers[] = $row['id_member'];
                }
            }
        }
        $smcFunc['db_free_result']($request);
    }

    // We welcome our new members in the realm of the banned.
    if (!empty($newMembers))
        $smcFunc['db_query']('', '
            DELETE FROM {db_prefix}log_online
            WHERE id_member IN ({array_int:new_banned_members})',
            array(
                'new_banned_members' => $newMembers,
            )
        );

    // Find members that are wrongfully marked as banned.
    $request = $smcFunc['db_query']('', '
        SELECT mem.id_member, mem.is_activated - 10 AS new_value
        FROM {db_prefix}members AS mem
            LEFT JOIN {db_prefix}ban_items AS bi ON (bi.id_member = mem.id_member OR mem.email_address LIKE bi.email_address)
            LEFT JOIN {db_prefix}ban_groups AS bg ON (bg.id_ban_group = bi.id_ban_group AND bg.cannot_access = {int:cannot_access_activated} AND (bg.expire_time IS NULL OR bg.expire_time > {int:current_time}))
        WHERE (bi.id_ban IS NULL OR bg.id_ban_group IS NULL)
            AND mem.is_activated >= {int:ban_flag}',
        array(
            'cannot_access_activated' => 1,
            'current_time' => time(),
            'ban_flag' => 10,
        )
    );
    while ($row = $smcFunc['db_fetch_assoc']($request))
    {
        // Don't do this twice!
        if (!in_array($row['id_member'], $allMembers))
        {
            $updates[$row['new_value']][] = $row['id_member'];
            $allMembers[] = $row['id_member'];
        }
    }
    $smcFunc['db_free_result']($request);

    if (!empty($updates))
        foreach ($updates as $newStatus => $members)
            updateMemberData($members, array('is_activated' => $newStatus));

    // Update the latest member and our total members as banning may change them.
    updateStats('member');
}

/**
 * Gets basic member data for the ban
 *
 * @param int $id The ID of the member to get data for
 * @return array An aray containing the ID, name, main IP and email address of the specified user
 */
function getMemberData($id)
{
    global $smcFunc;

    $suggestions = array();
    $request = $smcFunc['db_query']('', '
        SELECT id_member, real_name, member_ip, email_address
        FROM {db_prefix}members
        WHERE id_member = {int:current_user}
        LIMIT 1',
        array(
            'current_user' => $id,
        )
    );
    if ($smcFunc['db_num_rows']($request) > 0)
    {
        list ($suggestions['member']['id'], $suggestions['member']['name'], $suggestions['main_ip'], $suggestions['email']) = $smcFunc['db_fetch_row']($request);
        $suggestions['main_ip'] = inet_dtop($suggestions['main_ip']);
    }
    $smcFunc['db_free_result']($request);

    return $suggestions;
}

?>