- Working on revamping Ulmus bases classes

src/Pdo/SqlPdoTrait.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Ulmus\Pdo;
+
+trait SqlPdoTrait
+{
+    protected int $openedTransaction = 0;
+
+    public function beginTransaction(): bool
+    {
+        if ( 0 === $this->openedTransaction++ ) {
+            return $this->openTransaction();
+        }
+
+        return $this->exec("SAVEPOINT transaction_{$this->openedTransaction}") !== false;
+    }
+
+    public function commit() : bool
+    {
+        if ( 0 === --$this->openedTransaction) {
+            return parent::commit();
+        }
+
+        return $this->exec("RELEASE SAVEPOINT transaction_{$this->openedTransaction}") !== false;
+    }
+
+    public function rollback() : bool
+    {
+        if ($this->openedTransaction > 1) {
+            return $this->exec('ROLLBACK TO transaction_' . $this->openedTransaction--) !== false;
+        }
+        elseif ($this->openedTransaction-- === 1) {
+            return parent::rollback();
+        }
+
+        return false;
+    }
+
+    protected function openTransaction() : bool
+    {
+        return parent::beginTransaction();
+    }
+}