Support for host categories bases on regular expression matching agai…

…nst host names

conf/config.php

@@ -18,6 +18,9 @@
 # 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');
 

index.php

@@ -11,11 +11,30 @@
 # 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']);