From 0a547add2f4cc264380d2dab2c472efe5a1d7094 Mon Sep 17 00:00:00 2001
From: Pim van den Berg
Date: Sat, 3 May 2014 19:17:16 +0200
Subject: graph.php: use JSON plugins instead of including PHP plugin files

A couple of big changes here. A lot of logic moved to graph.php.

The PHP plugin files have been rewritten to JSON. In these JSON files
*everything* is optional. Also *NOT* having a JSON plugin file won't
block you from having a graph. The JSON will just make the graphs
prettier (by having a title, y-axis title, legend, colors, etc..).

The Collectd types.db file is parsed and used to determine RRD content.
When things are not defined in the JSON it will fallback to a default.
---
 graph.php | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 77 insertions(+), 8 deletions(-)

(limited to 'graph.php')

diff --git a/graph.php b/graph.php
index d170a6c..be46653 100644
--- a/graph.php
+++ b/graph.php
@@ -2,8 +2,10 @@
 
 require_once 'conf/common.inc.php';
 require_once 'inc/functions.inc.php';
+require_once 'inc/collectd.inc.php';
 
 $plugin = validate_get(GET('p'), 'plugin');
+$type = validate_get(GET('t'), 'type');
 $width = empty($_GET['x']) ? $CONFIG['width'] : $_GET['x'];
 $height = empty($_GET['y']) ? $CONFIG['height'] : $_GET['y'];
 
@@ -12,18 +14,85 @@ if (validate_get(GET('h'), 'host') === NULL) {
 	error_image();
 }
 
-if (!file_exists($CONFIG['webdir'].'/plugin/'.$plugin.'.php')) {
-	error_log(sprintf('CGP Error: plugin "%s" is not available', $plugin));
-	error_image();
-}
-
 if ($width > $CONFIG['max-width'] || $height > $CONFIG['max-height']) {
 	error_log('Resquested image is too large. Please configure max-width and max-height.');
 	error_image();
 }
 
-# load plugin
-include $CONFIG['webdir'].'/plugin/'.$plugin.'.php';
+$typesdb = parse_typesdb_file($CONFIG['typesdb']);
+
+if ($plugin == 'aggregation') {
+	$pi = explode("-", GET('pi'));
+	$plugin = $_GET['p'] = $pi[0];
+}
+
+# plugin json
+if (file_exists('plugin/'.$plugin.'.json')) {
+	$json = file_get_contents('plugin/'.$plugin.'.json');
+	$plugin_json = json_decode($json, true);
+
+	if (is_null($plugin_json))
+		error_log('CGP Error: invalid json in plugin/'.$plugin.'.json');
+}
+
+switch ($plugin_json[$type]['type']) {
+	case 'stacked':
+		require_once 'type/GenericStacked.class.php';
+		$obj = new Type_GenericStacked($CONFIG, $_GET);
+		break;
+	case 'io':
+		require_once 'type/GenericIO.class.php';
+		$obj = new Type_GenericIO($CONFIG, $_GET);
+		break;
+	case 'uptime':
+		require_once 'type/Uptime.class.php';
+		$obj = new Type_Uptime($CONFIG, $_GET);
+		break;
+	default:
+		require_once 'type/Default.class.php';
+		$obj = new Type_Default($CONFIG, $_GET);
+		break;
+}
+
+if (isset($typesdb[$type])) {
+	$obj->data_sources = array();
+	foreach ($typesdb[$type] as $ds => $property) {
+		$obj->data_sources[] = $ds;
+	}
+}
+
+if (isset($plugin_json[$type]['legend'])) {
+	$obj->order = array();
+	foreach ($plugin_json[$type]['legend'] as $rrd => $property) {
+		$obj->order[] = $rrd;
+		$obj->legend[$rrd] = isset($property['name']) ? $property['name'] : $rrd;
+		if (isset($property['color']))
+			$obj->colors[$rrd] = $property['color'];
+	}
+}
+
+if (isset($plugin_json[$type]['title'])) {
+	$obj->rrd_title = $plugin_json[$type]['title'];
+	$obj->rrd_title = str_replace('{{PI}}', GET('pi'), $obj->rrd_title);
+	$obj->rrd_title = str_replace('{{TI}}', GET('ti'), $obj->rrd_title);
+}
+
+if (isset($plugin_json[$type]['vertical'])) {
+	$obj->rrd_vertical = $plugin_json[$type]['vertical'];
+	$obj->rrd_vertical = str_replace('{{ND}}', ucfirst($CONFIG['network_datasize']), $obj->rrd_vertical);
+}
+
+if (isset($plugin_json[$type]['rrdtool_opts'])) {
+	$obj->rrdtool_opts = $plugin_json[$type]['rrdtool_opts'];
+}
+
+if (isset($plugin_json[$type]['datasize']) and $plugin_json[$type]['datasize'])
+	$obj->scale = $CONFIG['network_datasize'] == 'bits' ? 8 : 1;
+
+if (isset($plugin_json[$type]['scale']))
+	$obj->scale = $plugin_json[$type]['scale'];
 
+if (isset($plugin_json[$type]['legend_format']))
+	$obj->rrd_format = $plugin_json[$type]['legend_format'];
 
-?>
+$obj->rrd_graph();
-- 
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