Added migration to change length for user fields

app/DoctrineMigrations/Version20170510082609.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Application\Migrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Changed length for username, username_canonical, email and email_canonical fields in wallabag_user table.
+ */
+class Version20170510082609 extends AbstractMigration implements ContainerAwareInterface
+{
+    private $fields = [
+        'username',
+        'username_canonical',
+        'email',
+        'email_canonical',
+    ];
+
+    /**
+     * @var ContainerInterface
+     */
+    private $container;
+
+    public function setContainer(ContainerInterface $container = null)
+    {
+        $this->container = $container;
+    }
+
+    private function getTable($tableName)
+    {
+        return $this->container->getParameter('database_table_prefix').$tableName;
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function up(Schema $schema)
+    {
+        $this->skipIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'This migration only apply to MySQL');
+
+        foreach ($this->fields as $field) {
+            $this->addSql('ALTER TABLE '.$this->getTable('user').' CHANGE '.$field.' '.$field.' VARCHAR(180) NOT NULL;');
+        }
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function down(Schema $schema)
+    {
+        $this->skipIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'This migration only apply to MySQL');
+
+        foreach ($this->fields as $field) {
+            $this->addSql('ALTER TABLE '.$this->getTable('user').' CHANGE '.$field.' '.$field.' VARCHAR(255) NOT NULL;');
+        }
+    }
+}