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msd2/tracking/piwik/core/Columns/DimensionsProvider.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Columns;
+
+use Piwik\CacheId;
+use Piwik\Cache as PiwikCache;
+
+class DimensionsProvider
+{
+    /**
+     * @param $dimensionId
+     * @return Dimension
+     */
+    public function factory($dimensionId)
+    {
+        $listDimensions = self::getMapOfNameToDimension();
+
+        if (empty($listDimensions) || !is_array($listDimensions) || !$dimensionId || !array_key_exists($dimensionId, $listDimensions)) {
+            return null;
+        }
+
+        return $listDimensions[$dimensionId];
+    }
+
+    private static function getMapOfNameToDimension()
+    {
+        $cacheId = CacheId::siteAware(CacheId::pluginAware('DimensionFactoryMap'));
+
+        $cache = PiwikCache::getTransientCache();
+        if ($cache->contains($cacheId)) {
+            $mapIdToDimension = $cache->fetch($cacheId);
+        } else {
+            $dimensions = new static();
+            $dimensions = $dimensions->getAllDimensions();
+
+            $mapIdToDimension = array();
+            foreach ($dimensions as $dimension) {
+                $mapIdToDimension[$dimension->getId()] = $dimension;
+            }
+
+            $cache->save($cacheId, $mapIdToDimension);
+        }
+
+        return $mapIdToDimension;
+    }
+
+    /**
+     * Returns a list of all available dimensions.
+     * @return Dimension[]
+     */
+    public function getAllDimensions()
+    {
+        return Dimension::getAllDimensions();
+    }
+
+}