- First draft of current WIP

src/ConnectionAdapter.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace Ulmus;
+
+use Ulmus\Adapter\AdapterInterface;
+
+use Ulmus\Common\PdoObject;
+
+class ConnectionAdapter
+{
+    public string $name;
+
+    public array $configuration;
+
+    protected AdapterInterface $adapter;
+
+    public PdoObject $pdo;
+
+    public function __construct(string $name = "default", array $configuration = [])
+    {
+        $this->name = $name;
+        $this->configuration = $configuration;
+
+        if ( $name === "default" ) {
+            Ulmus::$defaultAdapter = $this;
+        }
+    }
+
+    public function resolveConfiguration()
+    {
+        $connection = $this->configuration['connections'][$this->name] ?? [];
+
+        if ( $adapterName = $connection['adapter'] ?? false ) {
+            $this->adapter = $this->instanciateAdapter($adapterName);
+        }
+        else {
+            throw new \InvalidArgumentException("Adapter not found within your configuration array.");
+        }
+
+        if ( false === $this->adapter->hostname = $connection['host'] ?? false ) {
+            throw new \InvalidArgumentException("Your `host` name is missing from your configuration array");
+        }
+
+        if ( false === $this->adapter->port = $connection['port'] ?? false ) {
+            throw new \InvalidArgumentException("Your `port` number is missing from your configuration array");
+        }
+
+        if ( false === $this->adapter->database = $connection['database'] ?? false ) {
+            throw new \InvalidArgumentException("Your `database` name is missing from your configuration array");
+        }
+
+        if ( false === $this->adapter->username = $connection['username'] ?? false ) {
+            throw new \InvalidArgumentException("Your `username` is missing from your configuration array");
+        }
+
+        if ( false === $this->adapter->password = $connection['password'] ?? false ) {
+            throw new \InvalidArgumentException("Your `password` is missing from your configuration array");
+        }
+    }
+
+    /**
+     * Connect the adapter
+     * @return self
+     */
+    public function connect()
+    {
+        $this->pdo = $this->adapter->connect();
+        $this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+        $this->pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES, false);
+        $this->pdo->setAttribute(\PDO::ATTR_AUTOCOMMIT, false);
+        $this->pdo->setAttribute(\PDO::ATTR_DEFAULT_FETCH_MODE, \PDO::FETCH_ASSOC);
+        $this->pdo->setAttribute(\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
+
+        return $this;
+    }
+
+    /**
+     * Instanciate an adapter which interact with the data source
+     * @param  string $name An Ulmus adapter or full class name implementing AdapterInterface
+     * @return AdapterInterface
+     */
+    protected function instanciateAdapter($name)
+    {
+        $class = substr($name, 0, 2) === "\\" ? $name : "\\Ulmus\\Adapter\\$name";
+        return new $class();
+    }
+}