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.

1 files changed, 24 insertions, 0 deletions

diff --git a/inc/collectd.inc.php b/inc/collectd.inc.php
index 3bfc6ff..695d79c 100644
--- a/inc/collectd.inc.php
+++ b/inc/collectd.inc.php
@@ -167,3 +167,27 @@ function plugin_sort($data) {
 
         return $data;
 }
+
+function parse_typesdb_file($file = '/usr/share/collectd/types.db') {
+        if (!file_exists($file))
+                $file = 'inc/types.db';
+
+        $types = array();
+        foreach (file($file) as $type) {
+                if(!preg_match('/^(?P<dataset>[\w_]+)\s+(?P<datasources>.*)/', $type, $matches))
+                        continue;
+                $dataset = $matches['dataset'];
+                $datasources = explode(', ', $matches['datasources']);
+
+                foreach ($datasources as $ds) {
+                        if (!preg_match('/^(?P<dsname>\w+):(?P<dstype>[\w]+):(?P<min>[\-\dU\.]+):(?P<max>[\dU\.]+)/', $ds, $matches))
+                                error_log(sprintf('CGP Error: DS "%s" from dataset "%s" did not match', $ds, $dataset));
+                        $types[$dataset][$matches['dsname']] = array(
+                                'dstype' => $matches['dstype'],
+                                'min' => $matches['min'],
+                                'max' => $matches['max'],
+                        );
+                }
+        }
+        return $types;
+}