multi connections system

src/Db.php

@@ -9,8 +9,9 @@ use PDOStatement;
 class Db
 {
     protected PDO $pdo;
+    protected string $name;
     protected string $connstring;
-    private static $instance = null;
+    private static array $instances = [];
     private string $type;
     private ?string $user;
     private ?string $password;
@@ -19,10 +20,10 @@ class Db
     private ?string $host;
     private string $error;
 
-
-    private function __construct($dir)
+    private function __construct($name, $dir)
     {
         $this->error = "";
+        $this->name = $name;
         $this->loadEnv($dir);
         $this->initPdo();
     }
@@ -41,17 +42,23 @@ class Db
     private function parseEnv()
     {
         try {
-            $this->type = isset($_ENV["DB_TYPE"]) ? $_ENV["DB_TYPE"] : null;
-            $this->user = isset($_ENV["DB_USER"]) ? $_ENV["DB_USER"] : null;
-            $this->host = isset($_ENV["DB_HOST"]) ? $_ENV["DB_HOST"] : null;
-            $this->password = isset($_ENV["DB_PASSWORD"]) ? $_ENV["DB_PASSWORD"] : null;
-            $this->database = isset($_ENV["DB_DATABASE"]) ? $_ENV["DB_DATABASE"] : null;
-            $this->port = isset($_ENV["DB_PORT"]) ? $_ENV["DB_PORT"] : null;
+            $key = (strtoupper(trim($this->name)));
+            $this->type = isset($_ENV[$this->getKey("TYPE", $key)]) ? $_ENV[$this->getKey("TYPE", $key)] : null;
+            $this->user = isset($_ENV[$this->getKey("USER", $key)]) ? $_ENV[$this->getKey("USER", $key)] : null;
+            $this->host = isset($_ENV[$this->getKey("HOST", $key)]) ? $_ENV[$this->getKey("HOST", $key)] : null;
+            $this->password = isset($_ENV[$this->getKey("PASSWORD", $key)]) ? $_ENV[$this->getKey("PASSWORD", $key)] : null;
+            $this->database = isset($_ENV[$this->getKey("DATABASE", $key)]) ? $_ENV[$this->getKey("DATABASE", $key)] : null;
+            $this->port = isset($_ENV[$this->getKey("PORT", $key)]) ? $_ENV[$this->getKey("PORT", $key)] : null;
         } catch (\Throwable $th) {
             $this->error = $th->getMessage();
         }
     }
 
+    private function getKey(string $type, string $name): string
+    {
+        return "DB_" . $name . "_" . $type;
+    }
+
     private function initPdo()
     {
         $this->getConnString();
@@ -132,22 +139,30 @@ class Db
         }
     }
 
-    public static function init($dir)
+    public static function init($dir, array $connections = ["default"])
     {
-        return self::retrieveInstance($dir);
+        self::fillInstances($dir, $connections);
+        return self::getInstance();
     }
 
-    private static function retrieveInstance($dir = __DIR__)
+    private static function fillInstances($dir, array $connections)
     {
-        if (self::$instance == null) {
-            self::$instance = new Db($dir);
+        foreach ($connections as $connection) {
+            if (!isset(self::$instances[$connection])) {
+                self::$instances[$connection] = new Db($connection, $dir);
+            }
         }
-        return self::$instance;
     }
 
-    public static function getInstance()
+    public static function getInstance($connection = "default")
     {
-        return self::retrieveInstance();
+        if (isset(self::$instances[$connection])) {
+            $instance = self::$instances[$connection];
+            if ($instance instanceof Db) {
+                return self::$instances[$connection];
+            }
+        }
+        throw new \Exception("Unknown connection");
     }
 
     public function getError()

src/Model.php

@@ -7,13 +7,14 @@ class Model
     protected mixed $values;
     protected array $updated;
     protected string $table;
+    protected string $connection = "default";
     protected string $pk;
-    private Db $db;
+    private ?Db $db;
     private bool $new;
 
     public function __construct()
     {
-        $this->db = Db::getInstance();
+        $this->db = null;
         $this->new = true;
         $this->values = array();
         $this->updated = array();
@@ -43,6 +44,17 @@ class Model
         return $this;
     }
 
+    public function getConnection()
+    {
+        return $this->connection;
+    }
+
+    public function setConnection($connection)
+    {
+        $this->connection = $connection;
+        return $this;
+    }
+
     public function fillData(mixed $data): self
     {
         $this->values = $data;
@@ -53,6 +65,7 @@ class Model
 
     public function save(): bool
     {
+        $this->db = Db::getInstance($this->connection);
         $ret = false;
         $qb = $this->newQueryBuilder();
         if ($this->new) {
@@ -84,7 +97,7 @@ class Model
 
     public function newQueryBuilder(): QueryBuilder
     {
-        return new QueryBuilder($this->table, $this->pk);
+        return new QueryBuilder($this->table, $this->pk, $this->connection);
     }
 
     public function __set($name, $value): void

src/QueryBuilder.php

@@ -4,22 +4,24 @@ namespace Kletellier\PdoWrapper;
 
 class QueryBuilder
 {
-    protected Db $db;
+    protected ?Db $db;
     protected array $columns;
     protected array $wheres;
     protected array $orders;
     protected array $groupby;
     protected string $table;
+    protected string $connection;
     protected string $pk;
     protected ?int $take;
     protected ?int $offset;
     protected string $raw_query;
 
-    public function __construct($table, $pk = "id")
+    public function __construct($table, $pk = "id", $connection = "default")
     {
         $this->table = $table;
         $this->pk = $pk;
-        $this->db = Db::getInstance();
+        $this->connection = $connection;
+        $this->db = null;
         $this->reset();
     }
 
@@ -175,6 +177,7 @@ class QueryBuilder
 
     private function getData(): mixed
     {
+        $this->db = Db::getInstance($this->connection);
         return $this->db->getSelectQuery($this->getQuery());
     }
 
@@ -265,4 +268,14 @@ class QueryBuilder
             return $this->getConstructedQuery();
         }
     }
+
+    public function getConnection()
+    {
+        return $this->connection;
+    }
+    public function setConnection($connection)
+    {
+        $this->connection = $connection;
+        return $this;
+    }
 }

tests/DbTest.php

@@ -7,9 +7,13 @@ use Kletellier\PdoWrapper\QueryBuilder;
 
 test("create db",function () {
     $dir = getcwd(); 
-    $db = Db::init($dir);
+    $db = Db::init($dir,["default","contwo"]);
     $ret = $db->executeRawQuery("CREATE TABLE test (id INTEGER PRIMARY KEY AUTOINCREMENT, col1 VARCHAR, date1 DATETIME);");
     expect($ret)->toBe(true);
+
+    $db2 = Db::getInstance("contwo");
+    $ret = $db2->executeRawQuery("CREATE TABLE test (id INTEGER PRIMARY KEY AUTOINCREMENT, col1 VARCHAR, date1 DATETIME);");
+    expect($ret)->toBe(true);
 });
 
 test("insert row",function () {
@@ -138,3 +142,28 @@ test("where array", function() {
     expect($in[0]->id)->toBe(2);
 
 });
+
+test("second connection", function() {
+    $row = new Model();
+    $row->setConnection("contwo");
+    $row->setTable("test");
+    $row->col1 = "test";
+    $row->date1 = new \DateTime();
+    $ret = $row->save();
+
+    $row2 = new Model();
+    $row2->setConnection("contwo");
+    $row2->setTable("test");
+    $row2->col1 = "test2";
+    $row2->date1 = new \DateTime();
+    $ret2 = $row2->save();
+    
+    expect($ret)->toBe(true);
+    expect($ret2)->toBe(true);
+
+    $qb = new QueryBuilder("test","id","contwo");
+    $rows = $qb->get();
+
+    expect($rows)->toBeArray();
+    expect(count($rows))->toBe(2);
+});