From 26cd32c6deb372dc25e3c010b65d9697962edf16 Mon Sep 17 00:00:00 2001
From: Mark Nellemann
Date: Wed, 26 Aug 2015 12:29:30 +0200
Subject: Support for host categories bases on regular expression matching
 against host names

---
 conf/config.php |  3 +++
 index.php       | 23 +++++++++++++++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/conf/config.php b/conf/config.php
index ec55d30..0628bfe 100644
--- a/conf/config.php
+++ b/conf/config.php
@@ -18,6 +18,9 @@ $CONFIG['rrdtool_opts'] = array();
 # category of hosts to show on main page
 #$CONFIG['cat']['category1'] = array('host1', 'host2');
 
+# category of hosts based on regular expression
+#$CONFIG['cat']['Mailservers'] = '/mail\d+/';
+
 # default plugins to show on host page
 $CONFIG['overview'] = array('load', 'cpu', 'memory', 'swap');
 
diff --git a/index.php b/index.php
index 94ecf80..9069152 100644
--- a/index.php
+++ b/index.php
@@ -11,11 +11,30 @@ $h = array();
 # show all categorized hosts
 if (isset($CONFIG['cat']) && is_array($CONFIG['cat'])) {
 	foreach($CONFIG['cat'] as $cat => $hosts) {
-		host_summary($cat, $hosts);
-		$h = array_merge($h, $hosts);
+
+		if(is_array($hosts)) {
+			host_summary($cat, $hosts);
+			$h = array_merge($h, $hosts);
+		} else {
+			// Asume regexp
+			$regexp = $hosts;
+			$ahosts = collectd_hosts();
+			$rhosts = array();
+
+			foreach($ahosts as $host) {
+				if(preg_match($regexp, $host)) {
+					array_push($rhosts, $host);
+				}
+			}
+
+			host_summary($cat, $rhosts);
+			$h = array_merge($h, $rhosts);
+		}
+	
 	}
 }
 
+
 # search for uncategorized hosts
 if(!$chosts = collectd_hosts())
 	printf('<p class="warn">Error: No Collectd hosts found in <em>%s</em></p>', $CONFIG['datadir']);
-- 
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