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msd2/tracking/piwik/core/API/Inconsistencies.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\API;
+
+/**
+ * Contains logic to replicate inconsistencies in Piwik's API. This class exists
+ * to provide a way to clean up existing Piwik code and behavior without breaking
+ * backwards compatibility immediately.
+ *
+ * Code that handles the case when the 'format_metrics' query parameter value is
+ * 'bc' should be removed as well. This code is in API\Request and DataTablePostProcessor.
+ *
+ * Should be removed before releasing Piwik 3.0.
+ */
+class Inconsistencies
+{
+    /**
+     * In Piwik 2.X and below, the "raw" API would format percent values but no others.
+     * This method returns the list of percent metrics that were returned from the API
+     * formatted so we can maintain BC.
+     *
+     * Used by DataTablePostProcessor.
+     */
+    public function getPercentMetricsToFormat()
+    {
+        return array(
+            'bounce_rate',
+            'conversion_rate',
+            'abandoned_rate',
+            'interaction_rate',
+            'exit_rate',
+            'bounce_rate_returning',
+            'nb_visits_percentage',
+            '/.*_evolution/',
+            '/goal_.*_conversion_rate/',
+            '/form_.*_rate/',
+            '/field_.*_rate/',
+        );
+    }
+}