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msd2/tracking/piwik/plugins/API/DataTable/MergeDataTables.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\Plugins\API\DataTable;
+
+use Piwik\DataTable\Row;
+use Piwik\DataTable;
+
+class MergeDataTables
+{
+
+    /**
+     * Merge the columns of two data tables.
+     * Manipulates the first table.
+     *
+     * @param DataTable|DataTable\Map $table1 The table to eventually filter.
+     * @param DataTable|DataTable\Map $table2 Whether to delete rows with no visits or not.
+     */
+    public function mergeDataTables($table1, $table2)
+    {
+        // handle table arrays
+        if ($table1 instanceof DataTable\Map && $table2 instanceof DataTable\Map) {
+            $subTables2 = $table2->getDataTables();
+            foreach ($table1->getDataTables() as $index => $subTable1) {
+                if (!array_key_exists($index, $subTables2)) {
+                    // occurs when archiving starts on dayN and continues into dayN+1, see https://github.com/piwik/piwik/issues/5168#issuecomment-50959925
+                    continue;
+                }
+                $subTable2 = $subTables2[$index];
+                $this->mergeDataTables($subTable1, $subTable2);
+            }
+            return;
+        }
+
+        $firstRow2 = $table2->getFirstRow();
+        if (!($firstRow2 instanceof Row)) {
+            return;
+        }
+
+        $firstRow1 = $table1->getFirstRow();
+        if (empty($firstRow1)) {
+            $firstRow1 = $table1->addRow(new Row());
+        }
+
+        foreach ($firstRow2->getColumns() as $metric => $value) {
+            $firstRow1->setColumn($metric, $value);
+        }
+    }
+
+}