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app/common/Implement/Connection.php

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+<?php
+namespace Incoviba\Common\Implement;
+
+use PDO;
+use PDOStatement;
+use PDOException;
+use Incoviba\Common\Define;
+
+class Connection implements Define\Connection
+{
+    public function __construct(protected Define\Database $database) {}
+
+    protected PDO $connection;
+    public function connect(): Define\Connection
+    {
+        if (!isset($this->connection)) {
+            if ($this->database->needsUser()) {
+                $this->connection = new PDO($this->database->getDSN(), $this->database->user, $this->database->password);
+            } else {
+                $this->connection = new PDO($this->database->getDSN());
+            }
+        }
+        return $this;
+    }
+    public function getPDO(): PDO
+    {
+        $this->connect();
+        return $this->connection;
+    }
+
+    public function query(string $query): PDOStatement
+    {
+        $this->connect();
+        $statement = $this->connection->query($query);
+        if ($statement === false) {
+            throw new PDOException("Query failed: '{$query}'");
+        }
+        return $statement;
+    }
+    public function prepare(string $query): PDOStatement
+    {
+        $this->connect();
+        $statement = $this->connection->prepare($query);
+        if ($statement === false) {
+            throw new PDOException("Query failed: '{$query}'");
+        }
+        return $statement;
+    }
+    public function execute(string $query, ?array $data = null): PDOStatement
+    {
+        if ($data === null) {
+            return $this->query($query);
+        }
+        $statement = $this->prepare($query);
+        $status = $statement->execute($data);
+        if ($status === false) {
+            throw new PDOException("Query could not be executed: '{$query}'");
+        }
+        return $statement;
+    }
+}

app/common/Implement/Database/MySQL.php

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+<?php
+namespace Incoviba\Common\Implement\Database;
+
+use Incoviba\Common\Define;
+
+class MySQL implements Define\Database
+{
+    public function __construct(public string $host, public string $name, public string $user, public string $password) {}
+
+    public int $port = 3306;
+
+    public function getDSN(): string
+    {
+        $dsn = "mysql:host={$this->host};dbname={$this->name}";
+        if ($this->port !== 3306) {
+            $dsn .= ";port={$this->port}";
+        }
+        return $dsn;
+    }
+    public function needsUser(): bool
+    {
+        return true;
+    }
+}

app/common/Implement/Exception/EmptyResult.php

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+<?php
+namespace Incoviba\Common\Implement\Exception;
+
+use Exception;
+use Throwable;
+
+class EmptyResult extends Exception
+{
+    public function __construct(string $query, ?Throwable $previous = null)
+    {
+        $message = "Empty results for {$query}";
+        $code = 700;
+        parent::__construct($message, $code, $previous);
+    }
+}