v.0.1

vendor/illuminate/database/Connectors/Connector.php

@@ -0,0 +1,139 @@
+<?php
+
+namespace Illuminate\Database\Connectors;
+
+use Doctrine\DBAL\Driver\PDOConnection;
+use Exception;
+use Illuminate\Database\DetectsLostConnections;
+use PDO;
+use Throwable;
+
+class Connector
+{
+    use DetectsLostConnections;
+
+    /**
+     * The default PDO connection options.
+     *
+     * @var array
+     */
+    protected $options = [
+        PDO::ATTR_CASE => PDO::CASE_NATURAL,
+        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+        PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
+        PDO::ATTR_STRINGIFY_FETCHES => false,
+        PDO::ATTR_EMULATE_PREPARES => false,
+    ];
+
+    /**
+     * Create a new PDO connection.
+     *
+     * @param  string  $dsn
+     * @param  array  $config
+     * @param  array  $options
+     * @return \PDO
+     *
+     * @throws \Exception
+     */
+    public function createConnection($dsn, array $config, array $options)
+    {
+        [$username, $password] = [
+            $config['username'] ?? null, $config['password'] ?? null,
+        ];
+
+        try {
+            return $this->createPdoConnection(
+                $dsn, $username, $password, $options
+            );
+        } catch (Exception $e) {
+            return $this->tryAgainIfCausedByLostConnection(
+                $e, $dsn, $username, $password, $options
+            );
+        }
+    }
+
+    /**
+     * Create a new PDO connection instance.
+     *
+     * @param  string  $dsn
+     * @param  string  $username
+     * @param  string  $password
+     * @param  array  $options
+     * @return \PDO
+     */
+    protected function createPdoConnection($dsn, $username, $password, $options)
+    {
+        if (class_exists(PDOConnection::class) && ! $this->isPersistentConnection($options)) {
+            return new PDOConnection($dsn, $username, $password, $options);
+        }
+
+        return new PDO($dsn, $username, $password, $options);
+    }
+
+    /**
+     * Determine if the connection is persistent.
+     *
+     * @param  array  $options
+     * @return bool
+     */
+    protected function isPersistentConnection($options)
+    {
+        return isset($options[PDO::ATTR_PERSISTENT]) &&
+               $options[PDO::ATTR_PERSISTENT];
+    }
+
+    /**
+     * Handle an exception that occurred during connect execution.
+     *
+     * @param  \Throwable  $e
+     * @param  string  $dsn
+     * @param  string  $username
+     * @param  string  $password
+     * @param  array  $options
+     * @return \PDO
+     *
+     * @throws \Exception
+     */
+    protected function tryAgainIfCausedByLostConnection(Throwable $e, $dsn, $username, $password, $options)
+    {
+        if ($this->causedByLostConnection($e)) {
+            return $this->createPdoConnection($dsn, $username, $password, $options);
+        }
+
+        throw $e;
+    }
+
+    /**
+     * Get the PDO options based on the configuration.
+     *
+     * @param  array  $config
+     * @return array
+     */
+    public function getOptions(array $config)
+    {
+        $options = $config['options'] ?? [];
+
+        return array_diff_key($this->options, $options) + $options;
+    }
+
+    /**
+     * Get the default PDO connection options.
+     *
+     * @return array
+     */
+    public function getDefaultOptions()
+    {
+        return $this->options;
+    }
+
+    /**
+     * Set the default PDO connection options.
+     *
+     * @param  array  $options
+     * @return void
+     */
+    public function setDefaultOptions(array $options)
+    {
+        $this->options = $options;
+    }
+}