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msd2/tracking/piwik/core/DataTable/Row/DataTableSummaryRow.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\DataTable\Row;
+
+use Piwik\DataTable;
+use Piwik\DataTable\Row;
+
+/**
+ * A special row whose column values are the aggregate of the row's subtable.
+ *
+ * This class creates sets its own columns to the sum of each row in the row's subtable.
+ *
+ * Non-numeric columns are bypassed during summation and do not appear in this
+ * rows columns.
+ *
+ * See {@link Piwik\DataTable\Row::sumRow()} for more information on the algorithm.
+ *
+ */
+class DataTableSummaryRow extends Row
+{
+    /**
+     * Constructor.
+     *
+     * @param DataTable|null $subTable The subtable of this row. This parameter is mostly for
+     *                                 convenience. If set, its rows will be summed to this one,
+     *                                 but it will not be set as this row's subtable (so
+     *                                 getSubtable() will return false).
+     */
+    public function __construct($subTable = null)
+    {
+        if (isset($subTable)) {
+            $this->sumTable($subTable);
+        }
+    }
+
+    /**
+     * Reset this row to an empty one and sums the associated subtable again.
+     */
+    public function recalculate()
+    {
+        $subTable = $this->getSubtable();
+        if ($subTable) {
+            $this->sumTable($subTable);
+        }
+    }
+
+    /**
+     * Sums a tables row with this one.
+     *
+     * @param DataTable $table
+     */
+    private function sumTable($table)
+    {
+        $metadata = $table->getMetadata(DataTable::COLUMN_AGGREGATION_OPS_METADATA_NAME);
+        $enableCopyMetadata = false;
+
+        foreach ($table->getRowsWithoutSummaryRow() as $row) {
+            $this->sumRow($row, $enableCopyMetadata, $metadata);
+        }
+
+        $summaryRow = $table->getRowFromId(DataTable::ID_SUMMARY_ROW);
+
+        if ($summaryRow) {
+            $this->sumRow($summaryRow, $enableCopyMetadata, $metadata);
+        }
+    }
+}