1 files changed, 65 insertions, 0 deletions
diff --git a/core/DataTable/Row/DataTableSummaryRow.php b/core/DataTable/Row/DataTableSummaryRow.php
new file mode 100644
index 0000000000..f4203d9489
--- /dev/null
+++ b/core/DataTable/Row/DataTableSummaryRow.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ * @category Piwik
+ * @package Piwik
+ */
+namespace Piwik\DataTable\Row;
+
+use Piwik\DataTable;
+use Piwik\DataTable\Manager;
+use Piwik\DataTable\Row;
+
+/**
+ * This class creates a row from a given DataTable.
+ * The row contains
+ * - for each numeric column, the returned "summary" column is the sum of all the subRows
+ * - for every other column, it is ignored and will not be in the "summary row"
+ *
+ * @see \DataTable\Row::sumRow() for more information on the algorithm
+ *
+ * @package Piwik
+ * @subpackage DataTable
+ */
+class DataTableSummaryRow extends Row
+{
+    /**
+     * @param DataTable $subTable
+     */
+    function __construct($subTable = null)
+    {
+        parent::__construct();
+
+        if ($subTable !== null) {
+            $this->sumTable($subTable);
+        }
+    }
+
+    /**
+     * Reset this row to an empty one and sum the associated subtable again.
+     */
+    public function recalculate()
+    {
+        $id = $this->getIdSubDataTable();
+        if ($id !== null) {
+            $subtable = Manager::getInstance()->getTable($id);
+            $this->sumTable($subtable);
+        }
+    }
+
+    /**
+     * Sums a tables row with this one.
+     *
+     * @param DataTable $table
+     */
+    private function sumTable($table)
+    {
+        foreach ($table->getRows() as $row) {
+            $this->sumRow($row, $enableCopyMetadata = false, $table->getColumnAggregationOperations());
+        }
+    }
+}