<?php

/*
 +-------------------------------------------------------------------------+
 | Copyright (C) 2004-2026 The Cacti Group                                 |
 |                                                                         |
 | This program is free software; you can redistribute it and/or           |
 | modify it under the terms of the GNU General Public License             |
 | as published by the Free Software Foundation; either version 2          |
 | of the License, or (at your option) any later version.                  |
 |                                                                         |
 | This program is distributed in the hope that it will be useful,         |
 | but WITHOUT ANY WARRANTY; without even the implied warranty of          |
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           |
 | GNU General Public License for more details.                            |
 +-------------------------------------------------------------------------+
 | Cacti: The Complete RRDTool-based Graphing Solution                     |
 +-------------------------------------------------------------------------+
 | This code is designed, written, and maintained by the Cacti Group. See  |
 | about.php and/or the AUTHORS file for specific developer information.   |
 +-------------------------------------------------------------------------+
 | http://www.cacti.net/                                                   |
 +-------------------------------------------------------------------------+
*/

/**
 * Render default monitor grouping output with active filters applied.
 *
 * @return string
 */
function renderDefault(): string {
	global $maxchars;

	$result = '';

	$sql_where = '';
	$sql_join  = '';
	$sql_limit = '';
	$sql_order = 'ORDER BY description';

	$rows = get_request_var('rows');

	if ($rows == '-1') {
		$rows = read_user_setting('monitor_rows');
	}

	if (!is_numeric($rows)) {
		$rows = read_config_option('num_rows_table');
	}

	if (get_request_var('view') == 'list') {
		$sql_order = get_order_string();
	}

	renderWhereJoin($sql_where, $sql_join);

	$poller_interval = read_config_option('poller_interval');

	// Only the List view paginates; all other views show every matching device.
	if (get_request_var('view') == 'list') {
		$sql_limit = ' LIMIT ' . ($rows * (get_request_var('page') - 1)) . ',' . $rows;
	}

	$hosts_sql = ("SELECT DISTINCT h.*, IFNULL(s.name,' " . __('Non-Site Device', 'monitor') . " ') AS site_name,
        CAST(IF(availability_method = 0, '0',
            IF(status_event_count > 0 AND status IN (1, 2), status_event_count*$poller_interval,
            IF(UNIX_TIMESTAMP(status_rec_date) < 943916400 AND status IN (0, 3), total_polls*$poller_interval,
            IF(UNIX_TIMESTAMP(status_rec_date) > 943916400, UNIX_TIMESTAMP() - UNIX_TIMESTAMP(status_rec_date),
            IF(snmp_sysUptimeInstance>0 AND snmp_version > 0, snmp_sysUptimeInstance/100, UNIX_TIMESTAMP()
        ))))) AS unsigned) AS instate
		FROM host AS h
		LEFT JOIN sites AS s
		ON h.site_id = s.id
		$sql_join
		$sql_where
		$sql_order
		$sql_limit");

	$hosts = db_fetch_assoc($hosts_sql);

	$total_rows = db_fetch_cell("SELECT COUNT(DISTINCT h.id)
        FROM host AS h
        LEFT JOIN sites AS s
        ON h.site_id = s.id
        $sql_join
        $sql_where");

	if (cacti_sizeof($hosts)) {
		// Determine the correct width of the cell
		$maxlen = 10;

		if (get_request_var('view') == 'default') {
			$maxlen = (int) db_fetch_cell("SELECT MAX(LENGTH(description))
				FROM host AS h
				$sql_join
				$sql_where");
		}

		$maxlen = getMonitorTrimLength($maxlen);

		$function = 'renderHeader' . ucfirst(get_request_var('view'));

		if (function_exists($function)) {
			// Call the custom render_header_ function
			$result .= $function($total_rows, $rows);
		}

		$count = 0;

		foreach ($hosts as $host) {
			if (is_device_allowed($host['id'])) {
				$result .= renderHost($host, true, $maxlen);
			}

			$count++;
		}

		$function = 'renderFooter' . ucfirst(get_request_var('view'));

		if (function_exists($function)) {
			// Call the custom render_footer_ function
			$result .= $function($total_rows, $rows);
		}
	}

	return $result;
}

/**
 * Whether the current view uses the device-tile card layout (as opposed to the
 * name grid or paginated list), and so supports grouped card panels.
 *
 * @return bool
 */
function monitorUseCardLayout(): bool {
	return in_array(get_request_var('view'), ['default', 'tiles', 'tilesadt'], true);
}

/**
 * Resolve the worst (most severe) device status CSS class across a group so the
 * group's card title can be coloured to match (down/breached/triggered/etc.).
 *
 * @param array $hosts Host rows in the group.
 *
 * @return string Status CSS class (e.g. deviceDown), defaulting to deviceUp.
 */
function monitorGroupWorstStatusClass(array $hosts): string {
	global $iclasses;

	$rank      = [1 => 100, 8 => 90, 4 => 80, 10 => 75, 9 => 70, 5 => 65, 7 => 60, 2 => 50, 0 => 40, 6 => 30, 3 => 10];
	$worst     = 3;
	$worst_val = -1;

	foreach ($hosts as $host) {
		$status = getHostStatus($host);
		$value  = $rank[$status] ?? 0;

		if ($value > $worst_val) {
			$worst_val = $value;
			$worst     = $status;
		}
	}

	return $iclasses[$worst] ?? 'deviceUp';
}

/**
 * Load the saved card ordering for a grouping from the active dashboard's
 * properties, falling back to the per-user setting.
 *
 * @param string $grouping Grouping key (site/template).
 *
 * @return array Ordered list of group ids, or empty when none saved.
 */
function monitorGetCardOrder(string $grouping): array {
	$dashboard = get_request_var('dashboard');

	if ($dashboard > 0 && monitorDashboardOwnedByUser($dashboard)) {
		$props = monitorGetDashboardProperties($dashboard);

		if (isset($props['cardorder'][$grouping]) && is_array($props['cardorder'][$grouping])) {
			return $props['cardorder'][$grouping];
		}
	}

	$json = read_user_setting('monitor_cardorder');

	if ($json != '') {
		$order = json_decode($json, true);

		if (isset($order[$grouping]) && is_array($order[$grouping])) {
			return $order[$grouping];
		}
	}

	return [];
}

/**
 * Reorder a group map to honour a saved id ordering, appending any groups not
 * present in the saved order.
 *
 * @param array $groups Map of group id => group data.
 * @param array $order  Saved list of group ids.
 *
 * @return array Reordered group map.
 */
function monitorApplyCardOrder(array $groups, array $order): array {
	if (!cacti_sizeof($order)) {
		return $groups;
	}

	$ordered = [];

	foreach ($order as $gid) {
		$gid = (string) $gid;

		if (isset($groups[$gid])) {
			$ordered[$gid] = $groups[$gid];
			unset($groups[$gid]);
		}
	}

	foreach ($groups as $gid => $group) {
		$ordered[$gid] = $group;
	}

	return $ordered;
}

/**
 * Render a set of grouped device cards (one card/panel per group) in a
 * responsive grid, with saved ordering applied and each title coloured by the
 * group's worst device status.
 *
 * @param string $grouping Grouping key (site/template).
 * @param array  $groups   Map of group id => ['label' => string, 'hosts' => array].
 * @param int    $maxlen   Trim length for host titles.
 *
 * @return string
 */
function monitorRenderGroupCards(string $grouping, array $groups, int $maxlen): string {
	$groups = monitorApplyCardOrder($groups, monitorGetCardOrder($grouping));

	$out = "<div class='monitorGroupGrid' data-grouping='" . html_escape($grouping) . "'>";

	foreach ($groups as $gid => $group) {
		$worst = monitorGroupWorstStatusClass($group['hosts']);

		// Let groups with many devices take a wider card so their tiles flow
		// across the page instead of stacking into one tall, narrow column. The
		// span maps to flex sizing in css (see .monitorGroupCard[data-span]).
		$span = (int) min(4, max(1, (int) ceil(cacti_sizeof($group['hosts']) / 6)));

		// Size every tile to the longest (trimmed) description in view so long
		// hostnames never overlap their neighbours. css widens the titles from
		// this custom property.
		$title_ch = max(8, min(40, $maxlen));
		$body     = "<div class='monitor_container' style='--monitor-title-ch:$title_ch'>";

		foreach ($group['hosts'] as $host) {
			$body .= renderHost($host, true, $maxlen);
		}

		$body .= '</div>';

		$out .= "<div class='monitorPanel monitorGroupCard' data-group='" . html_escape((string) $gid) . "' data-span='$span'>
			<div class='monitorPanelHeader monitorGroupTitle $worst'><i class='fas fa-grip-vertical monitorGroupDrag'></i> " . html_escape($group['label']) . "</div>
			<div class='monitorPanelBody'>$body</div>
		</div>";
	}

	$out .= '</div>';

	return $out;
}

/**
 * Render host output grouped by site.
 *
 * @return string
 */
function renderSite(): string {
	global $maxchars;

	$result = '';

	$sql_where = '';
	$sql_join  = '';
	$sql_limit = '';

	$rows = get_request_var('rows');

	if ($rows == '-1') {
		$rows = read_user_setting('monitor_rows');
	}

	if (!is_numeric($rows)) {
		$rows = read_config_option('num_rows_table');
	}

	renderWhereJoin($sql_where, $sql_join);

	// Only the List view paginates; all other views show every matching device.
	if (get_request_var('view') == 'list') {
		$sql_limit = ' LIMIT ' . ($rows * (get_request_var('page') - 1)) . ',' . $rows;
	}

	$hosts_sql = ("SELECT DISTINCT h.*, IFNULL(s.name,' " . __('Non-Site Devices', 'monitor') . " ') AS site_name
		FROM host AS h
		LEFT JOIN sites AS s
		ON s.id = h.site_id
		$sql_join
		$sql_where
		ORDER BY site_name, description
		$sql_limit");

	$hosts = db_fetch_assoc($hosts_sql);

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	[$hosts, $host_ids] = monitorFilterAllowedHosts($hosts);

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	$maxlen = 10;

	if (get_request_var('view') == 'default' && cacti_sizeof($host_ids)) {
		$maxlen = (int) db_fetch_cell('SELECT MAX(LENGTH(description))
			FROM host AS h
			WHERE id IN (' . implode(',', $host_ids) . ')');
	}

	$maxlen = getMonitorTrimLength($maxlen);

	if (monitorUseCardLayout()) {
		$groups = [];

		foreach ($hosts as $host) {
			$gid = (string) $host['site_id'];

			if (!isset($groups[$gid])) {
				$groups[$gid] = ['label' => $host['site_name'], 'hosts' => []];
			}

			$groups[$gid]['hosts'][] = $host;
		}

		return monitorRenderGroupCards('site', $groups, $maxlen);
	}

	$function = 'renderHeader' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		$result .= $function();
	}

	foreach ($hosts as $host) {
		$result .= renderHost($host, true, $maxlen);
	}

	$function = 'renderFooter' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		$result .= $function();
	}

	return $result;
}

/**
 * Render host output grouped by host template.
 *
 * @return string
 */
function renderTemplate(): string {
	global $maxchars;

	$result = '';

	$sql_where = '';
	$sql_join  = '';
	$sql_limit = '';

	$rows = get_request_var('rows');

	if ($rows == '-1') {
		$rows = read_user_setting('monitor_rows');
	}

	if (!is_numeric($rows)) {
		$rows = read_config_option('num_rows_table');
	}

	renderWhereJoin($sql_where, $sql_join);

	// Only the List view paginates; all other views show every matching device.
	if (get_request_var('view') == 'list') {
		$sql_limit = ' LIMIT ' . ($rows * (get_request_var('page') - 1)) . ',' . $rows;
	}

	if (get_request_var('template') > 0) {
		$sql_where .= ($sql_where == '' ? '' : 'AND ') . 'ht.id = ' . get_request_var('template');
	}

	$sql_template  = 'INNER JOIN host_template AS ht ON h.host_template_id=ht.id ';

	if (get_request_var('template') == -2) {
		$sql_where .= ($sql_where == '' ? '' : 'AND ') . 'ht.id IS NULL';
		$sql_template = 'LEFT JOIN host_template AS ht ON h.host_template_id=ht.id ';
	}

	$hosts = db_fetch_assoc("SELECT DISTINCT
		h.*, ht.name AS host_template_name
		FROM host AS h
		$sql_template
		$sql_join
		$sql_where
		ORDER BY ht.name, h.description
		$sql_limit");

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	[$hosts, $host_ids] = monitorFilterAllowedHosts($hosts);

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	$maxlen = 10;

	if (get_request_var('view') == 'default' && cacti_sizeof($host_ids)) {
		$maxlen = (int) db_fetch_cell('SELECT MAX(LENGTH(description))
			FROM host AS h
			WHERE id IN (' . implode(',', $host_ids) . ')');
	}

	$maxlen = getMonitorTrimLength($maxlen);

	if (monitorUseCardLayout()) {
		$groups = [];

		foreach ($hosts as $host) {
			$gid   = (string) $host['host_template_id'];
			$label = $host['host_template_name'] != '' ? $host['host_template_name'] : __('Non-Templated Devices', 'monitor');

			if (!isset($groups[$gid])) {
				$groups[$gid] = ['label' => $label, 'hosts' => []];
			}

			$groups[$gid]['hosts'][] = $host;
		}

		return monitorRenderGroupCards('template', $groups, $maxlen);
	}

	$function = 'renderHeader' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		$result .= $function();
	}

	foreach ($hosts as $host) {
		$result .= renderHost($host, true, $maxlen);
	}

	$function = 'renderFooter' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		$result .= $function();
	}

	return $result;
}

/**
 * Filter out disallowed hosts and return normalized host/id lists.
 *
 * @param array $hosts Host rows.
 *
 * @return array{array, array}
 */
function monitorFilterAllowedHosts(array $hosts): array {
	$host_ids = [];

	foreach ($hosts as $index => $host) {
		if (is_device_allowed($host['id'])) {
			$host_ids[] = $host['id'];
		} else {
			unset($hosts[$index]);
		}
	}

	return [array_values($hosts), $host_ids];
}

/**
 * Determine max description trim length for tree rendering context.
 *
 * @return int
 */
function monitorGetTreeRenderMaxLength(): int {
	$maxlen = 10;

	if (get_request_var('view') == 'default') {
		$maxlen = db_fetch_cell("SELECT MAX(LENGTH(description))
            FROM host AS h
            INNER JOIN graph_tree_items AS gti
            ON gti.host_id = h.id
            WHERE disabled = ''
            AND deleted = ''");
	}

	return getMonitorTrimLength($maxlen);
}

/**
 * Build map of tree branch labels keyed by "tree_id:parent_id".
 *
 * @param array $branchWhost Tree branch/host rows.
 *
 * @return array
 */
function monitorBuildTreeTitles(array $branchWhost): array {
	$titles = [];
	$ptree  = '';

	foreach ($branchWhost as $b) {
		if ($ptree != $b['graph_tree_id']) {
			$titles[$b['graph_tree_id'] . ':0'] = __('Root Branch', 'monitor');
			$ptree                              = $b['graph_tree_id'];
		}

		if ($b['parent'] > 0) {
			$titles[$b['graph_tree_id'] . ':' . $b['parent']] = db_fetch_cell_prepared(
				'SELECT title
                FROM graph_tree_items
                WHERE id = ?
                AND graph_tree_id = ?
                ORDER BY position',
				[$b['parent'], $b['graph_tree_id']]
			);
		}
	}

	return $titles;
}

/**
 * Render grouped tree title/branch sections for monitor view.
 *
 * @param array $titles Tree titles map keyed by "tree_id:parent_id".
 * @param int   $maxlen Trim length used for host title rendering.
 *
 * @return string
 */
function monitorRenderTreeTitleSections(array $titles, int $maxlen): string {
	$result = '';
	$ptree  = '';

	foreach ($titles as $index => $title) {
		[$graph_tree_id, $parent] = explode(':', $index);
		$oid                      = $parent;

		$sql_where = '';
		$sql_join  = '';
		renderWhereJoin($sql_where, $sql_join);

		$hosts_sql = "SELECT h.*, IFNULL(s.name,' " . __('Non-Site Device', 'monitor') . " ') AS site_name
            FROM host AS h
            LEFT JOIN sites AS s
            ON h.site_id = s.id
            INNER JOIN graph_tree_items AS gti
            ON h.id = gti.host_id
            $sql_join
            $sql_where
            AND parent = ?
            AND graph_tree_id = ?
            GROUP BY h.id
            ORDER BY gti.position";

		$hosts = db_fetch_assoc_prepared($hosts_sql, [$oid, $graph_tree_id]);

		$tree_name = db_fetch_cell_prepared(
			'SELECT name
            FROM graph_tree
            WHERE id = ?',
			[$graph_tree_id]
		);

		if ($ptree != $tree_name) {
			if ($ptree != '') {
				$result .= '</div>';
			}

			$result .= "<div class='monitorTableHeader'>
                <div class='navBarNavigation'>
                    <div class='navBarNavigationNone'>" . __esc('Tree: %s', $tree_name, 'monitor') . "</div>
                </div>
            </div>
            <div class='monitorTable'>
                <div class='monitor_sub_container'>";

			$ptree = $tree_name;
		}

		if (!cacti_sizeof($hosts)) {
			continue;
		}

		[$hosts] = monitorFilterAllowedHosts($hosts);

		if (!cacti_sizeof($hosts)) {
			continue;
		}

		$result .= "<div class='monitorSubTable'><div class='navBarNavigation'><div class='navBarNavigationNone'>" . __esc('Branch: %s', $title, 'monitor') . "</div></div><div class='monitor_sub_container'>";

		foreach ($hosts as $host) {
			$result .= renderHost($host, true, $maxlen);
		}

		$result .= '</div></div>';
	}

	return $result;
}

/**
 * Translatable label for the card/section holding devices not on any tree.
 *
 * @return string
 */
function monitorNonTreeLabel(): string {
	return __('Non-Tree Devices', 'monitor');
}

/**
 * Render section for monitored hosts that are not attached to any tree.
 *
 * @return string
 */
function monitorRenderNonTreeSection(): string {
	$result = '';

	if (get_request_var('tree') >= 0) {
		return $result;
	}

	$hosts = getHostNonTreeArray();

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	[$hosts, $host_ids] = monitorFilterAllowedHosts($hosts);

	if (!cacti_sizeof($hosts)) {
		return $result;
	}

	$maxlen = 10;

	if (get_request_var('view') == 'default' && cacti_sizeof($host_ids)) {
		$maxlen = db_fetch_cell('SELECT MAX(LENGTH(description))
            FROM host AS h
            WHERE id IN (' . implode(',', $host_ids) . ")
            AND h.deleted = ''");
	}

	$maxlen = getMonitorTrimLength($maxlen);

	$result .= "<div class='monitorTableHeader'>
        <div class='navBarNavigation'>
            <div class='navBarNavigationNone'>" . monitorNonTreeLabel() . "</div>
        </div>
    </div>
    <div class='monitor_container'>";

	foreach ($hosts as $leaf) {
		$result .= renderHost($leaf, true, $maxlen);
	}

	$result .= '</div></div>';

	return $result;
}

/**
 * Render tree grouping as device cards (one card per tree, plus a Non-Tree
 * card), mirroring the Site and Device Template card layouts.
 *
 * @param array $tree_list Allowed trees for the current filter.
 *
 * @return string
 */
function monitorRenderTreeCards(array $tree_list): string {
	$groups   = [];
	$host_ids = [];

	if (cacti_sizeof($tree_list)) {
		$tree_ids = [];

		foreach ($tree_list as $tree) {
			$tree_ids[$tree['id']] = $tree['id'];
		}

		$sql_where = '';
		$sql_join  = '';
		renderWhereJoin($sql_where, $sql_join);

		$hosts = db_fetch_assoc('SELECT DISTINCT h.*, gt.id AS graph_tree_id, gt.name AS graph_tree_name
			FROM host AS h
			INNER JOIN graph_tree_items AS gti
			ON h.id = gti.host_id
			INNER JOIN graph_tree AS gt
			ON gt.id = gti.graph_tree_id
			' . $sql_join . '
			' . $sql_where . '
			AND gti.host_id > 0
			AND gti.graph_tree_id IN (' . implode(',', $tree_ids) . ')
			ORDER BY gt.sequence, h.description');

		if (cacti_sizeof($hosts)) {
			[$hosts, $ids] = monitorFilterAllowedHosts($hosts);

			$host_ids = array_merge($host_ids, $ids);

			foreach ($hosts as $host) {
				$gid = 'tree_' . $host['graph_tree_id'];

				if (!isset($groups[$gid])) {
					$groups[$gid] = ['label' => $host['graph_tree_name'], 'hosts' => []];
				}

				$groups[$gid]['hosts'][] = $host;
			}
		}
	}

	// Devices not attached to any tree get their own card, unless a specific
	// tree is selected in the filter.
	if (get_request_var('tree') < 0) {
		$nontree = getHostNonTreeArray();

		if (cacti_sizeof($nontree)) {
			[$nontree, $ids] = monitorFilterAllowedHosts($nontree);

			if (cacti_sizeof($nontree)) {
				$host_ids = array_merge($host_ids, $ids);

				$groups['nontree'] = ['label' => monitorNonTreeLabel(), 'hosts' => $nontree];
			}
		}
	}

	if (!cacti_sizeof($groups)) {
		return '';
	}

	// Size the trim length from the hosts actually rendered here (including the
	// Non-Tree card) so labels aren't trimmed against unrelated tree devices.
	$maxlen = 10;

	if (get_request_var('view') == 'default' && cacti_sizeof($host_ids)) {
		$maxlen = (int) db_fetch_cell('SELECT MAX(LENGTH(description))
			FROM host AS h
			WHERE id IN (' . implode(',', $host_ids) . ')');
	}

	$maxlen = getMonitorTrimLength($maxlen);

	// Default-order the tree cards by device count (busiest first); any saved
	// drag order the user set still wins in monitorRenderGroupCards().
	uasort($groups, static function (array $a, array $b): int {
		return cacti_sizeof($b['hosts']) <=> cacti_sizeof($a['hosts']);
	});

	return monitorRenderGroupCards('tree', $groups, $maxlen);
}

/**
 * Render monitor tree grouping view, including tree and non-tree sections.
 *
 * @return string
 */
function renderTree(): string {
	$result = '';

	if (get_request_var('tree') > 0) {
		$sql_where = 'gt.id=' . get_request_var('tree');
	} else {
		$sql_where = '';
	}

	if (get_request_var('tree') != -2) {
		$tree_list = get_allowed_trees(false, false, $sql_where, 'sequence');
	} else {
		$tree_list = [];
	}

	// Card-based views group each tree (and non-tree devices) into panels, the
	// same as the Site and Device Template groupings.
	if (monitorUseCardLayout()) {
		return monitorRenderTreeCards($tree_list);
	}

	$function = 'renderHeader' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		$hosts = [];

		// Call the custom render_header_ function
		$result .= $function();
	}

	if (cacti_sizeof($tree_list)) {
		$tree_ids = [];

		foreach ($tree_list as $tree) {
			$tree_ids[$tree['id']] = $tree['id'];
		}

		$sql_where = '';
		$sql_join  = '';
		renderWhereJoin($sql_where, $sql_join);

		$branchWhost = db_fetch_assoc("SELECT DISTINCT gti.graph_tree_id, gti.parent
            FROM graph_tree_items AS gti
            INNER JOIN graph_tree AS gt
            ON gt.id = gti.graph_tree_id
            INNER JOIN host AS h
            ON h.id = gti.host_id
            $sql_join
            $sql_where
            AND gti.host_id > 0
            AND gti.graph_tree_id IN (" . implode(',', $tree_ids) . ')
            ORDER BY gt.sequence, gti.position');

		if (cacti_sizeof($branchWhost)) {
			$titles = monitorBuildTreeTitles($branchWhost);
			$result .= monitorRenderTreeTitleSections($titles, monitorGetTreeRenderMaxLength());
		}

		$result .= '</div>';
	}

	$result .= monitorRenderNonTreeSection();

	$function = 'renderFooter' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		// Call the custom render_footer_ function
		$result .= $function();
	}

	return $result;
}

/**
 * Resolve display status for a host with monitor/thold/mute overlays applied.
 *
 * @param array $host Host row data.
 * @param bool  $real Return raw computed status even if icon class is missing.
 *
 * @return int
 */
function getHostStatus(array $host, bool $real = false): int {
	global $thold_hosts, $servcheck_hosts, $iclasses;

	// If the host has been muted, show the muted Icon
	if ($host['status'] != 1 && in_array($host['id'], $thold_hosts, true)) {
		$host['status'] = 4;
	}

	if (in_array($host['id'], $_SESSION['monitor_muted_hosts'], true) && $host['status'] == 1) {
		$host['status'] = 5;
	} elseif (in_array($host['id'], $_SESSION['monitor_muted_hosts'], true) && $host['status'] == 4) {
		$host['status'] = 9;
	} elseif ($host['status'] == 3) {
		if ($host['cur_time'] > $host['monitor_alert'] && !empty($host['monitor_alert'])) {
			$host['status'] = 8;
		} elseif ($host['cur_time'] > $host['monitor_warn'] && !empty($host['monitor_warn'])) {
			$host['status'] = 7;
		} elseif (isset($servcheck_hosts) && array_key_exists($host['id'], $servcheck_hosts)) {
			$host['status'] = 10;
		}
	}

	// If wanting the real status, or the status is already known
	// return the real status, otherwise default to unknown
	return ($real || array_key_exists($host['status'], $iclasses)) ? $host['status'] : 0;
}

/**
 * Translate status code into localized display label.
 *
 * @param int|string $status Monitor status code.
 *
 * @return string
 */
function getHostStatusDescription(mixed $status): string {
	global $icolorsdisplay;

	if (array_key_exists($status, $icolorsdisplay)) {
		return $icolorsdisplay[$status];
	} else {
		return __('Unknown', 'monitor') . " ($status)";
	}
}

/**
 * Render one host using view-specific renderer or default tile layout.
 *
 * @param array $host   Host row data.
 * @param bool  $float  Legacy compatibility flag (currently unused).
 * @param int   $maxlen Maximum host description trim length.
 *
 * @return string|null
 */
function renderHost(array $host, bool $float = true, int $maxlen = 10): ?string {
	global $thold_hosts, $config, $icolorsdisplay, $iclasses, $classes, $maxchars, $mon_zoom_state;

	// throw out tree root items
	if (array_key_exists('name', $host)) {
		return null;
	}

	if ($host['id'] <= 0) {
		return null;
	}

	$host['anchor'] = $config['url_path'] . 'graph_view.php?action=preview&reset=1&host_id=' . $host['id'];

	// Preserve the raw availability status (0-3) before it is collapsed into the
	// single display status, so the Events column can detect every active event.
	$host['raw_status'] = (int) $host['status'];

	if ($host['status'] == 3 && array_key_exists($host['id'], $thold_hosts)) {
		$host['status'] = 4;
		$host['anchor'] = $config['url_path'] . 'plugins/thold/thold_graph.php?action=thold&reset=true&status=1&host_id=' . $host['id'];
	}

	$host['real_status'] = getHostStatus($host, true);
	$host['status']      = getHostStatus($host);
	$host['iclass']      = $iclasses[$host['status']];

	$function = 'renderHost' . ucfirst(get_request_var('view'));

	if (function_exists($function)) {
		// Call the custom render_host_ function
		$result = $function($host);
	} else {
		$iclass = getStatusIcon($host['status'], $host['monitor_icon']);
		$fclass = get_request_var('size');

		$monitor_times     = read_user_setting('monitor_uptime');
		$monitor_time_html = '';

		if ($host['status'] <= 2 || $host['status'] == 5) {
			if ($mon_zoom_state) {
				$fclass = 'monitor_errorzoom';
			}
			$tis = get_timeinstate($host);

			if ($monitor_times == 'on') {
				$monitor_time_html = "<br><span class='monitor_device{$fclass} deviceDown monitor_uptime'>$tis</span>";
			}
			$result = "<div class='$fclass flash monitor_device_frame'><a class='pic hyperLink' href='" . html_escape($host['anchor']) . "'><i id='" . $host['id'] . "' class='$iclass " . $host['iclass'] . "'></i><br><span class='{$fclass}_title'>" . title_trim(html_escape($host['description']), $maxlen) . "</span>$monitor_time_html</a></div>";
		} else {
			$tis = get_uptime($host);

			if ($monitor_times == 'on') {
				$monitor_time_html = "<br><div class='monitor_device{$fclass} deviceUp monitor_uptime'>$tis</div>";
			}

			$result = "<div class='$fclass monitor_device_frame'><a class='pic hyperLink' href='" . html_escape($host['anchor']) . "'><i id=" . $host['id'] . " class='$iclass " . $host['iclass'] . "'></i><br><span class='{$fclass}_title'>" . title_trim(html_escape($host['description']), $maxlen) . "</span>$monitor_time_html</a></div>";
		}
	}

	return $result;
}

/**
 * Resolve icon class for host status and configured monitor icon.
 *
 * @param int    $status Current monitor status.
 * @param string $icon   Configured icon key.
 *
 * @return string
 */
function getStatusIcon(int $status, string $icon): string {
	global $fa_icons;

	if (($status == 1 || ($status == 4 && get_request_var('status') > 0)) && read_user_setting('monitor_sound') == 'First Orders Suite.mp3') {
		return 'fab fa-first-order fa-spin mon_icon';
	}

	if ($icon != '' && array_key_exists($icon, $fa_icons)) {
		if (isset($fa_icons[$icon]['class'])) {
			return $fa_icons[$icon]['class'] . ' mon_icon';
		} else {
			return "fa fa-$icon mon_icon";
		}
	} else {
		return 'fa fa-server' . ' mon_icon';
	}
}

/**
 * Convert uptime/fail timestamp into compact human-readable duration text.
 *
 * @param int|string $status_time Timestamp string or SNMP uptime ticks.
 * @param bool       $seconds     Include seconds in output string.
 *
 * @return string
 */
function monitorPrintHostTime(mixed $status_time, bool $seconds = false): string {
	// If the host is down, make a downtime since message
	$dt   = '';

	if (is_numeric($status_time)) {
		$sfd  = round($status_time / 100, 0);
	} else {
		$sfd  = time() - strtotime($status_time);
	}
	$dt_d = floor($sfd / 86400);
	$dt_h = floor(($sfd - ($dt_d * 86400)) / 3600);
	$dt_m = floor(($sfd - ($dt_d * 86400) - ($dt_h * 3600)) / 60);
	$dt_s = $sfd - ($dt_d * 86400) - ($dt_h * 3600) - ($dt_m * 60);

	if ($dt_d > 0) {
		$dt .= $dt_d . 'd:' . $dt_h . 'h:' . $dt_m . 'm' . ($seconds ? ':' . $dt_s . 's' : '');
	} elseif ($dt_h > 0) {
		$dt .= $dt_h . 'h:' . $dt_m . 'm' . ($seconds ? ':' . $dt_s . 's' : '');
	} elseif ($dt_m > 0) {
		$dt .= $dt_m . 'm' . ($seconds ? ':' . $dt_s . 's' : '');
	} else {
		$dt .= ($seconds ? $dt_s . 's' : __('Just Up', 'monitor'));
	}

	return $dt;
}

/**
 * Trim monitor text fields for quote and whitespace artifacts.
 *
 * @param string $string Input string.
 *
 * @return string
 */
function monitorTrim(string $string): string {
	return trim($string, "\"'\\ \n\t\r");
}

/**
 * Render wrapper header for default/tile monitor views.
 *
 * @return string
 */
function renderHeaderDefault(): string {
	return "<div class='monitorTable monitor'><div class='monitor_container'>";
}

/**
 * Render wrapper header for names view table.
 *
 * @return string
 */
function renderHeaderNames(): string {
	return "<table class='monitorTable monitor'>";
}

/**
 * Render wrapper header for icon tile view.
 *
 * @return string
 */
function renderHeaderTiles(): string {
	return renderHeaderDefault();
}

/**
 * Render wrapper header for advanced tile view.
 *
 * @return string
 */
function renderHeaderTilesadt(): string {
	return renderHeaderDefault();
}

/**
 * Event key => short label and status CSS class for the Events column pills.
 *
 * @return array
 */
function monitorEventMeta(): array {
	return [
		'down'         => ['label' => __('Down', 'monitor'),            'class' => 'deviceDown'],
		'recovering'   => ['label' => __('Recovering', 'monitor'),      'class' => 'deviceRecovering'],
		'triggered'    => ['label' => __('Triggered', 'monitor'),       'class' => 'deviceThreshold'],
		'down_ma'      => ['label' => __('Down (M/A)', 'monitor'),       'class' => 'deviceDownMuted'],
		'triggered_ma' => ['label' => __('Triggered (M/A)', 'monitor'),  'class' => 'deviceThresholdMuted'],
		'warn_ping'    => ['label' => __('Warn Ping', 'monitor'),        'class' => 'deviceWarning'],
		'alert_ping'   => ['label' => __('Alert Ping', 'monitor'),       'class' => 'deviceAlert'],
		'failed_svc'   => ['label' => __('Failed Svc', 'monitor'),       'class' => 'deviceServiceCheck'],
	];
}

/**
 * Resolve every active event on a host for the Events column (a device can have
 * several, e.g. Down and Triggered). Uses the preserved raw availability status
 * plus the triggered-thold, failing-servcheck and session mute sets.
 *
 * @param array $host Host row data.
 *
 * @return array List of active event keys.
 */
function monitorHostEvents(array $host): array {
	global $thold_hosts, $servcheck_hosts;

	$raw    = isset($host['raw_status']) ? (int) $host['raw_status'] : (int) $host['status'];
	$muted  = isset($_SESSION['monitor_muted_hosts']) && in_array($host['id'], $_SESSION['monitor_muted_hosts'], true);
	$events = [];

	if ($raw == 1) {
		$events[] = $muted ? 'down_ma' : 'down';
	} elseif ($raw == 2) {
		$events[] = 'recovering';
	}

	if (isset($thold_hosts) && array_key_exists($host['id'], $thold_hosts)) {
		$events[] = $muted ? 'triggered_ma' : 'triggered';
	}

	if ($raw == 3) {
		if (!empty($host['monitor_alert']) && $host['cur_time'] > $host['monitor_alert']) {
			$events[] = 'alert_ping';
		} elseif (!empty($host['monitor_warn']) && $host['cur_time'] > $host['monitor_warn']) {
			$events[] = 'warn_ping';
		}
	}

	// A failing service check is additive and independent of ping availability:
	// monitorEventFilterSql('failed_svc') matches the host regardless of its Up/
	// Down state, so a Down+Failed-Svc host must still get the Failed Svc pill.
	if (isset($servcheck_hosts) && array_key_exists($host['id'], $servcheck_hosts)) {
		$events[] = 'failed_svc';
	}

	return $events;
}

/**
 * Render header and sortable column bar for list view.
 *
 * @param int $total_rows Total rows matching active filters.
 * @param int $rows       Page row limit.
 *
 * @return string
 */
function renderHeaderList(int $total_rows = 0, int $rows = 0): string {
	$display_text = [
		'nosort_actions' => [
			'display' => __('Actions', 'monitor'),
			'align'   => 'left',
			'tip'     => __('Open the device detail panels', 'monitor')
		],
		'description' => [
			'display' => __('Description', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'left',
			'tip'     => __('Device description as set on the Devices page', 'monitor')
		],
		'location' => [
			'display' => __('Location', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'left',
			'tip'     => __('Physical location recorded for the device', 'monitor')
		],
		'site_name' => [
			'display' => __('Site', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'left',
			'tip'     => __('Site the device is assigned to', 'monitor')
		],
		'id' => [
			'display' => __('ID', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'left',
			'tip'     => __('Cacti internal device id', 'monitor')
		],
		'monitor_criticality' => [
			'display' => __('Criticality', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'left',
			'tip'     => __('Monitoring criticality assigned to the device', 'monitor')
		],
		'nosort_events' => [
			'display' => __('Events', 'monitor'),
			'align'   => 'center',
			'tip'     => __('Active events on the device (Down, Triggered, Warn/Alert Ping, Failed Svc, ...); click a pill to add or remove that event from the Events filter', 'monitor')
		],
		'nosort_tholds' => [
			'display' => __('Thresholds', 'monitor'),
			'align'   => 'center',
			'tip'     => __('Breached / Triggered / Total thresholds (thold plugin) on the device; click to toggle the Triggered event filter', 'monitor')
		],
		'nosort_servchecks' => [
			'display' => __('Service Checks', 'monitor'),
			'align'   => 'center',
			'tip'     => __('Failed / Total service checks (servcheck plugin) for the device; click to toggle the Failed Svc event filter', 'monitor')
		],
		'monitor_warn' => [
			'display' => __('Warning', 'monitor'),
			'sort'    => 'DESC',
			'align'   => 'left',
			'tip'     => __('Ping latency Warning / Alert thresholds (ms) configured for this device; a notification is raised when the response time crosses them', 'monitor')
		],
		'monitor_text' => [
			'display' => __('Admin', 'monitor'),
			'sort'    => 'ASC',
			'tip'     => __('Administrative monitor message shown while the device is Down or Recovering', 'monitor'),
			'align'   => 'left'
		],
		'availability' => [
			'display' => __('Availability', 'monitor'),
			'sort'    => 'DESC',
			'align'   => 'right',
			'tip'     => __('Percentage of successful availability checks over the retained history', 'monitor')
		],
		'avg_time' => [
			'display' => __('Averages', 'monitor'),
			'sort'    => 'DESC',
			'align'   => 'right',
			'tip'     => __('Current / average ping response time in milliseconds', 'monitor')
		],
		'instate' => [
			'display' => __('Length in Status', 'monitor'),
			'sort'    => 'ASC',
			'align'   => 'right',
			'tip'     => __('How long the device has been in its current status', 'monitor')
		],
		'status_fail_date' => [
			'display' => __('Last Fail', 'monitor'),
			'sort'    => 'DESC',
			'align'   => 'right',
			'tip'     => __('Date and time the device last failed its availability check', 'monitor')
		],
	];

	// Hide the Thresholds / Service Checks columns when their plugin is absent.
	if (!api_plugin_is_enabled('thold')) {
		unset($display_text['nosort_tholds']);
	}

	if (!api_plugin_is_enabled('servcheck') || !api_plugin_user_realm_auth('servcheck_test.php')) {
		unset($display_text['nosort_servchecks']);
	}

	ob_start();

	$nav = html_nav_bar('monitor.php?rfilter=' . rawurlencode(get_request_var('rfilter')), MAX_DISPLAY_PAGES, get_request_var('page'), $rows, $total_rows, 12, __('Devices'), 'page', 'main');

	html_start_box(__('Monitored Devices', 'monitor'), '100%', false, 3, 'center', '');

	print $nav;

	html_header_sort($display_text, get_request_var('sort_column'), get_request_var('sort_direction'), false);

	$output = ob_get_contents();

	ob_end_clean();

	return $output;
}

/**
 * Indicate whether grouped section headers are suppressed for list view.
 *
 * @return bool
 */
function renderSuppressgroupsList(): bool {
	return true;
}

/**
 * Render wrapper footer for default/tile monitor views.
 *
 * @return string
 */
function renderFooterDefault(): string {
	return '</div></div>';
}

/**
 * Render footer row for names view including trailing empty cells.
 *
 * @return string
 */
function renderFooterNames(): string {
	$col = 7 - $_SESSION['names'];

	if ($col == 0) {
		return '</tr></table>';
	} else {
		return '<td colspan="' . $col . '"></td></tr></table>';
	}
}

/**
 * Render wrapper footer for icon tile view.
 *
 * @return string
 */
function renderFooterTiles(): string {
	return renderFooterDefault();
}

/**
 * Render wrapper footer for advanced tile view.
 *
 * @return string
 */
function renderFooterTilesadt(): string {
	return renderFooterDefault();
}

/**
 * Render list view footer and bottom pager.
 *
 * @param int $total_rows Total rows matching active filters.
 * @param int $rows       Page row limit.
 *
 * @return string
 */
function renderFooterList(int $total_rows, int $rows): string {
	ob_start();

	html_end_box(false);

	if ($total_rows > 0) {
		$nav = html_nav_bar('monitor.php?rfilter=' . rawurlencode(get_request_var('rfilter')), MAX_DISPLAY_PAGES, get_request_var('page'), $rows, $total_rows, 12, __('Devices'), 'page', 'main');

		print $nav;
	}

	$output = ob_get_contents();

	ob_end_clean();

	return $output;
}

/**
 * Render one host row in list view.
 *
 * @param array $host Host row data.
 *
 * @return string
 */
function renderHostList(array $host): string {
	global $criticalities, $iclasses, $thold_counts, $servcheck_counts, $config;

	if ($host['status'] < 2 || $host['status'] == 5) {
		$dt = get_timeinstate($host);
	} elseif (strtotime($host['status_rec_date']) > 192800) {
		$dt = get_timeinstate($host);
	} else {
		$dt = __('Never', 'monitor');
	}

	if ($host['status'] < 3 || $host['status'] == 5) {
		$host_admin = $host['monitor_text'];
	} else {
		$host_admin = '';
	}

	$crit_level = isset($host['monitor_criticality']) ? (int) $host['monitor_criticality'] : 0;

	if ($crit_level > 0) {
		$host_crit = "<span class='monitorPill monitorCrit monitorCrit$crit_level monitorFilterPill' role='button' tabindex='0' data-filter='crit' data-value='$crit_level' title='" . __esc('Filter by this criticality (click again to clear)', 'monitor') . "'>" . html_escape($criticalities[$crit_level]) . '</span>';
	} else {
		$host_crit = "<span class='monitorPill monitorCrit monitorCrit0 monitorFilterPill' role='button' tabindex='0' data-filter='crit' data-value='0' title='" . __esc('Criticality not set - click to filter unset devices (click again to clear)', 'monitor') . "'>" . __esc('Not Set', 'monitor') . '</span>';
	}

	// Events column: a short pill for every active event (a device can have
	// several, e.g. Down + Triggered); each pill toggles that event in the
	// multi-select filter. A muted 'None' pill is shown when the device is clean.
	$event_keys = monitorHostEvents($host);

	if (cacti_sizeof($event_keys)) {
		$meta  = monitorEventMeta();
		$pills = [];

		foreach ($event_keys as $ekey) {
			if (isset($meta[$ekey])) {
				$pills[] = "<span class='monitorPill " . $meta[$ekey]['class'] . " monitorFilterPill' role='button' tabindex='0' data-filter='events' data-value='$ekey' title='" . __esc('Click to add or remove this event from the filter', 'monitor') . "'>" . html_escape($meta[$ekey]['label']) . '</span>';
			}
		}

		$events_cell = implode(' ', $pills);
	} else {
		$events_cell = "<span class='monitorPill monitorPillMuted'>" . __esc('None', 'monitor') . '</span>';
	}

	// Thresholds pill: breached / triggered / total (thold plugin); a muted
	// 'Not Set' pill is shown when the device has no thresholds. Clicking toggles
	// the Triggered event.
	if (isset($thold_counts[$host['id']]) && $thold_counts[$host['id']]['total'] > 0) {
		$tc         = $thold_counts[$host['id']];
		$tcls       = ($tc['triggered'] > 0 || $tc['breached'] > 0) ? 'deviceThreshold' : 'monitorPillMuted';
		$thold_cell = "<span class='monitorPill $tcls monitorFilterPill' role='button' tabindex='0' data-filter='events' data-value='triggered' title='" . __esc('Breached / Triggered / Total thresholds - click to toggle the Triggered event filter', 'monitor') . "'>" . $tc['breached'] . ' / ' . $tc['triggered'] . ' / ' . $tc['total'] . '</span>';
	} else {
		$thold_cell = "<span class='monitorPill monitorPillMuted' title='" . __esc('No thresholds defined for this device', 'monitor') . "'>" . __esc('Not Set', 'monitor') . '</span>';
	}

	// Service checks pill: failed / total (servcheck plugin); a muted 'Not Set'
	// pill is shown when the device has no service checks. Clicking toggles the
	// Failed Svc event.
	if (isset($servcheck_counts[$host['id']]) && $servcheck_counts[$host['id']]['total'] > 0) {
		$sc             = $servcheck_counts[$host['id']];
		$scls           = ($sc['failed'] > 0) ? 'deviceServiceCheck' : 'monitorPillMuted';
		$servcheck_cell = "<span class='monitorPill $scls monitorFilterPill' role='button' tabindex='0' data-filter='events' data-value='failed_svc' title='" . __esc('Failed / Total service checks - click to toggle the Failed Svc event filter', 'monitor') . "'>" . $sc['failed'] . ' / ' . $sc['total'] . '</span>';
	} else {
		$servcheck_cell = "<span class='monitorPill monitorPillMuted' title='" . __esc('No service checks defined for this device', 'monitor') . "'>" . __esc('Not Set', 'monitor') . '</span>';
	}

	if ($host['availability_method'] > 0) {
		$host_avg     =	__('%d ms', $host['cur_time'], 'monitor') . ' / ' . __('%d ms', $host['avg_time'], 'monitor');
	} else {
		$host_avg     = __('N/A', 'monitor');
	}

	if (isset($host['monitor_warn']) && ($host['monitor_warn'] > 0 || $host['monitor_alert'] > 0)) {
		$host_warn = __('%0.2d ms', $host['monitor_warn'], 'monitor') . ' / ' . __('%0.2d ms', $host['monitor_alert'], 'monitor');
	} else {
		$host_warn = '';
	}

	if (strtotime($host['status_fail_date']) < 86400) {
		$host['status_fail_date'] = __('Never', 'monitor');
	}

	$host_datefail = $host['status_fail_date'];

	ob_start();

	print "<tr class='tableRow line{$host['id']} selectable'>";

	$actions = "<a class='monitorActions pic' href='#' data-id='" . $host['id'] . "' title='" . __esc('Device Detail Panels', 'monitor') . "'><i class='fas fa-layer-group'></i></a>";

	$actions .= "<a class='monitorActions pic' href='" . html_escape($config['url_path'] . 'graph_view.php?action=preview&reset=1&host_id=' . $host['id']) . "' title='" . __esc('View Graphs', 'monitor') . "'><i class='fas fa-chart-line monitorGraph'></i></a>";

	if (api_plugin_user_realm_auth('host.php')) {
		$actions .= "<a class='monitorActions pic' href='" . html_escape($config['url_path'] . 'host.php?action=edit&id=' . $host['id']) . "' title='" . __esc('Edit Device', 'monitor') . "'><i class='fas fa-pen-square'></i></a>";
	}

	form_selectable_cell($actions, $host['id'], '1%', 'left');
	form_selectable_cell($host['description'], $host['id'], '', 'left');
	form_selectable_cell($host['location'], $host['id'], '', 'left');
	form_selectable_cell($host['site_name'], $host['id'], '', 'left');
	form_selectable_cell($host['id'], $host['id'], '', 'left');
	form_selectable_cell($host_crit, $host['id'], '', 'left');
	form_selectable_cell($events_cell, $host['id'], '', 'center');

	if (api_plugin_is_enabled('thold')) {
		form_selectable_cell($thold_cell, $host['id'], '', 'center');
	}

	if (api_plugin_is_enabled('servcheck') && api_plugin_user_realm_auth('servcheck_test.php')) {
		form_selectable_cell($servcheck_cell, $host['id'], '', 'center');
	}

	form_selectable_cell($host_warn, $host['id'], '', 'left');
	form_selectable_cell($host_admin, $host['id'], '', 'white-space:pre-wrap;text-align:left');
	form_selectable_cell(round($host['availability'], 2) . ' %', $host['id'], '', 'right');
	form_selectable_cell($host_avg, $host['id'], '', 'right');
	form_selectable_cell($dt, $host['id'], '', 'right');
	form_selectable_cell($host_datefail, $host['id'], '', 'right');

	form_end_row();

	$result = ob_get_contents();

	ob_end_clean();

	return $result;
}

/**
 * Render one host cell in names view grid.
 *
 * @param array $host Host row data.
 *
 * @return string
 */
function renderHostNames(array $host): string {
	$fclass = get_request_var('size');

	$result = '';

	$maxlen            = getMonitorTrimLength(100);

	if ($_SESSION['names'] == 0) {
		$result .= '<tr>';
	}

	if ($host['status'] <= 2 || $host['status'] == 5) {
		$result .= "<td class='{$fclass}_names flash'><a class='hyperLink' href='" . html_escape($host['anchor']) . "'><span class='{$fclass} deviceDown '>" . title_trim(html_escape($host['description']), $maxlen) . '</span></a></td>';
	} else {
		$result .= "<td class='{$fclass}_names'><a class='hyperLink' href='" . html_escape($host['anchor']) . "'><span class='{$fclass}'>" . title_trim(html_escape($host['description']), $maxlen) . '</span></a></td>';
	}

	$_SESSION['names']++;

	if ($_SESSION['names'] > 7) {
		$result .= '</tr>';
		$_SESSION['names'] = 0;
	}

	return $result;
}

/**
 * Render one host icon tile.
 *
 * @param array $host Host row data.
 *
 * @return string
 */
function renderHostTiles(array $host): string {
	$class  = getStatusIcon($host['status'], $host['monitor_icon']);
	$fclass = get_request_var('size');

	return "<div class='{$fclass}_tiles monitor_device_frame'><a class='pic hyperLink textSubHeaderDark' href='" . html_escape($host['anchor']) . "'><i id='" . $host['id'] . "' class='$class " . $host['iclass'] . "'></i></a></div>";
}

/**
 * Render one advanced host tile including time-in-state/uptime text.
 *
 * @param array $host Host row data.
 *
 * @return string
 */
function renderHostTilesadt(array $host): string {
	$tis = '';

	$class  = getStatusIcon($host['status'], $host['monitor_icon']);
	$fclass = get_request_var('size');
	$name   = title_trim(html_escape($host['description']), 40);

	if ($host['status'] < 2 || $host['status'] == 5) {
		$tis = get_timeinstate($host);

		return "<div class='{$fclass}_tilesadt monitor_device_frame'><a class='pic hyperLink textSubHeaderDark' href='" . html_escape($host['anchor']) . "'><i id='" . $host['id'] . "' class='$class " . $host['iclass'] . "'></i><br><span class='{$fclass}_title'>$name</span><br><span class='monitor_device_{$fclass} deviceDown monitor_uptime'>$tis</span></a></div>";
	} else {
		$tis = get_uptime($host);

		return "<div class='{$fclass}_tilesadt monitor_device_frame'><a class='pic hyperLink textSubHeaderDark' href='" . html_escape($host['anchor']) . "'><i id='" . $host['id'] . "' class='$class " . $host['iclass'] . "'></i><br><span class='{$fclass}_title'>$name</span><br><span class='monitor_device_{$fclass} deviceUp monitor_uptime'>$tis</span></a></div>";
	}
}

/**
 * Apply monitor trim setting to a computed source field length.
 *
 * @param int $fieldlen Initial field length.
 *
 * @return int
 */
function getMonitorTrimLength(int $fieldlen): int {
	global $maxchars;

	if (get_request_var('view') == 'default' || get_request_var('view') == 'names') {
		$maxlen = $maxchars;

		if (get_request_var('trim') < 0) {
			$maxlen = 4000;
		} elseif (get_request_var('trim') > 0) {
			$maxlen = get_request_var('trim');
		}

		if ($fieldlen > $maxlen) {
			$fieldlen = $maxlen;
		}
	}

	return $fieldlen;
}