Centralize operations on hardcoded paths

refs #54

application/controllers/GraphController.php

@@ -5,17 +5,14 @@ namespace Icinga\Module\Graphite\Controllers;
 use DateTimeZone;
 use Icinga\Exception\Http\HttpBadRequestException;
 use Icinga\Exception\Http\HttpNotFoundException;
-use Icinga\Module\Graphite\Graphing\MetricsDataSource;
-use Icinga\Module\Graphite\GraphiteUtil;
-use Icinga\Module\Graphite\GraphiteWebClient;
+use Icinga\Module\Graphite\Graphing\GraphingTrait;
 use Icinga\Module\Graphite\Web\Controller\MonitoringAwareController;
-use Icinga\Module\Graphite\Web\Widget\GraphsTrait;
 use Icinga\Util\TimezoneDetect;
 use Icinga\Web\UrlParams;
 
 class GraphController extends MonitoringAwareController
 {
-    use GraphsTrait;
+    use GraphingTrait;
 
     /**
      * The URL parameters for the graph
@@ -93,7 +90,7 @@ class GraphController extends MonitoringAwareController
         }
 
         $charts = $templates[$this->graphParams['template']]->getCharts(
-            new MetricsDataSource(GraphiteWebClient::getInstance()),
+            static::getMetricsDataSource(),
             $this->filterParams->toArray(false)
         );
 

library/Graphite/Graphing/GraphingTrait.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Icinga\Module\Graphite\Graphing;
+
+use Icinga\Application\Config;
+use Icinga\Module\Graphite\GraphiteWebClient;
+
+trait GraphingTrait
+{
+    /**
+     * All loaded templates
+     *
+     * @var Templates
+     */
+    protected static $allTemplates;
+
+    /**
+     * Metrics data source
+     *
+     * @var MetricsDataSource
+     */
+    protected static $metricsDataSource;
+
+    /**
+     * Load and get all templates
+     *
+     * @return Templates
+     */
+    protected static function getAllTemplates()
+    {
+        if (static::$allTemplates === null) {
+            static::$allTemplates = (new Templates())
+                ->loadDir(Config::resolvePath('modules/graphite/templates'));
+        }
+
+        return static::$allTemplates;
+    }
+
+    /**
+     * Get metrics data source
+     *
+     * @return MetricsDataSource
+     */
+    public static function getMetricsDataSource()
+    {
+        if (static::$metricsDataSource === null) {
+            static::$metricsDataSource = new MetricsDataSource(GraphiteWebClient::getInstance());
+        }
+
+        return static::$metricsDataSource;
+    }
+}

library/Graphite/Web/Widget/Graphs.php

@@ -4,9 +4,8 @@ namespace Icinga\Module\Graphite\Web\Widget;
 
 use Icinga\Application\Icinga;
 use Icinga\Module\Graphite\Forms\TimeRangePicker\TimeRangePickerTrait;
-use Icinga\Module\Graphite\Graphing\MetricsDataSource;
+use Icinga\Module\Graphite\Graphing\GraphingTrait;
 use Icinga\Module\Graphite\Graphing\Template;
-use Icinga\Module\Graphite\GraphiteWebClient;
 use Icinga\Module\Graphite\Web\Widget\Graphs\Host as HostGraphs;
 use Icinga\Module\Graphite\Web\Widget\Graphs\Service as ServiceGraphs;
 use Icinga\Module\Monitoring\Object\Host;
@@ -19,7 +18,7 @@ use Icinga\Web\Widget\AbstractWidget;
 
 abstract class Graphs extends AbstractWidget
 {
-    use GraphsTrait;
+    use GraphingTrait;
 
     /**
      * Graph image width
@@ -102,7 +101,6 @@ abstract class Graphs extends AbstractWidget
         /** @var View $view */
         $view = $this->view();
         $result = []; // kind of string builder
-        $dataSource = new MetricsDataSource(GraphiteWebClient::getInstance());
         $filter = $this->getMonitoredObjectFilter();
         $imageBaseUrl = $this->getImageBaseUrl();
         $templates = static::getAllTemplates()->getTemplates();
@@ -112,7 +110,7 @@ abstract class Graphs extends AbstractWidget
 
         foreach ($templateNames as $templateName) {
             if ($this->designedForMyMonitoredObjectType($templates[$templateName])) {
-                $charts = $templates[$templateName]->getCharts($dataSource, $filter);
+                $charts = $templates[$templateName]->getCharts(static::getMetricsDataSource(), $filter);
                 if (! empty($charts)) {
                     $result[] = '<div class="images">';
 

library/Graphite/Web/Widget/GraphsTrait.php

@@ -1,31 +0,0 @@
-<?php
-
-namespace Icinga\Module\Graphite\Web\Widget;
-
-use Icinga\Application\Config;
-use Icinga\Module\Graphite\Graphing\Templates;
-
-trait GraphsTrait
-{
-    /**
-     * All loaded templates
-     *
-     * @var Templates
-     */
-    protected static $allTemplates;
-
-    /**
-     * Load and get all templates
-     *
-     * @return Templates
-     */
-    protected static function getAllTemplates()
-    {
-        if (static::$allTemplates === null) {
-            static::$allTemplates = (new Templates())
-                ->loadDir(Config::resolvePath('modules/graphite/templates'));
-        }
-
-        return static::$allTemplates;
-    }
-}