support splitting into multiple graphs via imagefilters

Author: fabianbees

application/controllers/IcingadbimgController.php

@@ -49,6 +49,7 @@ class IcingadbimgController extends IcingadbGrafanaController
     protected $dashboarduid;
     protected $panelId;
     protected $orgId;
+    protected $imagefilter;
 
     /**
      * Mainly loading defaults and the configuration.
@@ -115,6 +116,12 @@ public function init()
         $this->dataSource = $this->myConfig->get('datasource', $this->dataSource);
         $this->shadows = $this->myConfig->get('shadows', $this->shadows);
         $this->custvarconfig = ($this->myConfig->get('custvarconfig', $this->custvarconfig));
+        
+        $this->imagefilter = $this->hasParam('imagefilter') ? urldecode($this->getParam('imagefilter')) : "";
+        
+        /**
+         * Verify the certificate's name against host
+         */
         $this->SSLVerifyHost = ($this->myConfig->get('ssl_verifyhost', $this->SSLVerifyHost));
         $this->SSLVerifyPeer = ($this->myConfig->get('ssl_verifypeer', $this->SSLVerifyPeer));
 
@@ -278,7 +285,7 @@ private function getMyimageHtml($serviceName, $hostName, &$imageHtml)
 
         $pngUrl = sprintf(
             '%s://%s/render/d-solo/%s/%s?var-hostname=%s&var-service=%s&var-command=%s%s&panelId=%s&orgId=%s'
-            . '&width=%s&height=%s&theme=%s&from=%s&to=%s',
+            . '&width=%s&height=%s&theme=%s&from=%s&to=%s%s',
             $this->protocol,
             $this->grafanaHost,
             $this->dashboarduid,
@@ -293,7 +300,8 @@ private function getMyimageHtml($serviceName, $hostName, &$imageHtml)
             $this->height,
             $this->grafanaTheme,
             urlencode($this->timerange),
-            urlencode($this->timerangeto)
+            urlencode($this->timerangeto),
+            $this->imagefilter
         );
 
         // fetch image with curl

library/Grafana/ProvidedHook/Icingadb/IcingaDbGrapher.php

@@ -235,7 +235,7 @@ private function getGraphConf($serviceName, $serviceCommand = null): ?self
      * @return bool
      * @throws \Icinga\Exception\ProgrammingError
      */
-    private function getMyPreviewHtml($serviceName, $hostName, HtmlDocument $previewHtml): bool
+    private function getMyPreviewHtml($serviceName, $hostName, HtmlDocument $previewHtml, $imageFilter = ""): bool
     {
         $imgClass = $this->shadows ? "grafana-img grafana-img-shadows" : "grafana-img";
 
@@ -249,7 +249,8 @@ private function getMyPreviewHtml($serviceName, $hostName, HtmlDocument $preview
                     'panelid' => $this->panelId,
                     'timerange' => urlencode($this->timerange),
                     'timerangeto' => urlencode($this->timerangeto),
-                    'cachetime' => $this->cacheTime
+                    'cachetime' => $this->cacheTime,
+                    'imagefilter' => urlencode($imageFilter)
                     ]
                 );
             } else {
@@ -260,7 +261,8 @@ private function getMyPreviewHtml($serviceName, $hostName, HtmlDocument $preview
                     'panelid' => $this->panelId,
                     'timerange' => urlencode($this->timerange),
                     'timerangeto' => urlencode($this->timerangeto),
-                    'cachetime' => $this->cacheTime
+                    'cachetime' => $this->cacheTime,
+                    'imagefilter' => urlencode($imageFilter)
                     ]
                 );
             }
@@ -459,24 +461,35 @@ public function getPreviewHtml(Model $object, $report = false)
             $html = new HtmlDocument();
             $this->panelId = $panelid;
 
-            // The image value will be returned as reference
-            $previewHtml = new HtmlDocument();
-            $res = $this->getMyPreviewHtml($serviceName, $hostName, $previewHtml);
-
-            if ($res) {
-                // Add Link to Panel if the user has the permission
-                if ($this->permission->hasPermission('grafana/showlink')) {
-                    $linkUrl = $url;
-                    $linkUrl = preg_replace('/(viewPanel=)[^&]+/', '${1}' . $panelid, $linkUrl);
-                    $textLink = new Link('View in Grafana', $linkUrl, ['target' => '_blank', 'class' => 'external-link']);
-                    $html->add($textLink);
-                    $iconLink = new Link(new Icon('arrow-up-right-from-square', ['title' => 'View in Grafana']), $linkUrl, ['target' => '_blank', 'class' => 'external-link']);
-                    $html->add($iconLink);
-                }
-
-                $html->addHtml($previewHtml);
+            $flattened_vars = $object->vars;
+            // The $object->vars array is flattened, we unflatten the subarray grafanaimagefiltersarray here:
+            $i = 0;
+            $info = [];
+            while (isset($flattened_vars['grafanaimagefiltersarray[' . $i . ']'])) {
+                $info[$i] = $flattened_vars['grafanaimagefiltersarray[' . $i . ']'];
+                $i++;
             }
 
+            foreach ($info as $value) {
+
+                // The image value will be returned as reference
+                $previewHtml = new HtmlDocument();
+                $res = $this->getMyPreviewHtml($serviceName, $hostName, $previewHtml, $value);
+
+                if ($res) {
+                    // Add Link to Panel if the user has the permission
+                    if ($this->permission->hasPermission('grafana/showlink')) {
+                        $linkUrl = $url;
+                        $linkUrl = preg_replace('/(viewPanel=)[^&]+/', '${1}' . $panelid, $linkUrl);
+                        $textLink = new Link('View in Grafana', $linkUrl, ['target' => '_blank', 'class' => 'external-link']);
+                        $html->add($textLink);
+                        $iconLink = new Link(new Icon('arrow-up-right-from-square', ['title' => 'View in Grafana']), $linkUrl, ['target' => '_blank', 'class' => 'external-link']);
+                        $html->add($iconLink);
+                    }
+
+                    $html->addHtml($previewHtml);
+                }
+
             $returnHtml->add($html);
         }