First commit

vendor/SimpleValidator/Validators/Unique.php

@@ -0,0 +1,78 @@
+<?php
+
+/*
+ * This file is part of Simple Validator.
+ *
+ * (c) Frédéric Guillot <contact@fredericguillot.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace SimpleValidator\Validators;
+
+use SimpleValidator\Base;
+
+/**
+ * @author Frédéric Guillot <contact@fredericguillot.com>
+ */
+class Unique extends Base
+{
+    private $pdo;
+    private $primary_key;
+    private $table;
+
+
+    public function __construct($field, $error_message, \PDO $pdo, $table, $primary_key = 'id')
+    {
+        parent::__construct($field, $error_message);
+
+        $this->pdo = $pdo;
+        $this->primary_key = $primary_key;
+        $this->table = $table;
+    }
+
+
+    public function execute(array $data)
+    {
+        if (isset($data[$this->field]) && $data[$this->field] !== '') {
+
+            if (! isset($data[$this->primary_key])) {
+
+                $rq = $this->pdo->prepare('SELECT COUNT(*) FROM '.$this->table.' WHERE '.$this->field.'=?');
+
+                $rq->execute(array(
+                    $data[$this->field]
+                ));
+
+                $result = $rq->fetch(\PDO::FETCH_NUM);
+
+                if (isset($result[0]) && $result[0] === '1') {
+
+                    return false;
+                }
+            }
+            else {
+
+                $rq = $this->pdo->prepare(
+                    'SELECT COUNT(*) FROM '.$this->table.'
+                    WHERE '.$this->field.'=? AND '.$this->primary_key.' != ?'
+                );
+                
+                $rq->execute(array(
+                    $data[$this->field], 
+                    $data[$this->primary_key]
+                ));
+                
+                $result = $rq->fetch(\PDO::FETCH_NUM);
+
+                if (isset($result[0]) && $result[0] === '1') {
+
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+}