Moved to folder backend

.gitignore

@@ -1,5 +1,5 @@
-data/classes/Setting.php
-data/cache
-data/tmp
-data/qr
+backend/classes/Setting.php
+backend/cache
+backend/tmp
+backend/qr
 .idea

api/v1/index.php

@@ -1,8 +1,8 @@
 <?php
 
-require '../../data/classes/core/Autoloader.php';
+require '../../backend/classes/core/Autoloader.php';
 
-$autoloader = new Autoloader('../../data/cache/');
+$autoloader = new Autoloader('../../backend/cache/');
 
 $session = new Session();
 

backend/classes/core/Autoloader.php

@@ -4,9 +4,9 @@ declare(strict_types=1);
 
 class Autoloader
 {
-    private const PATH_CLASSES = 'data/classes';
+    private const PATH_CLASSES = 'backend/classes';
     private const PATH_CONTROLLERS = self::PATH_CLASSES . '/controller';
-    private const PATH_CACHE = 'data/cache/';
+    private const PATH_CACHE = 'backend/cache/';
 
     public function __construct(string $cachePath = self::PATH_CACHE)
     {

backend/classes/core/DatabaseInterface.php

@@ -21,7 +21,7 @@ interface DatabaseInterface
     public function getResult(): array;
 
     /**
-     * Selects data from a table.
+     * Selects backend from a table.
      */
     public function Select(
         string $tableName,
@@ -44,7 +44,7 @@ interface DatabaseInterface
     public function Insert(string $table, array $fields): ?int;
 
     /**
-     * Edits data inside a table.
+     * Edits backend inside a table.
      */
     public function Update(string $table, array $fields, array $conditions): void;
 

backend/classes/core/MySqlDatabase.php

@@ -16,7 +16,11 @@ final class MySqlDatabase implements DatabaseInterface
 		string $password = Setting::MYSQL_PASSWORD,
 		string $database = Setting::MYSQL_DATABASE
 	) {
+        try {
             $this->connection = new PDO("mysql:host=$hostname;dbname=$database", $user, $password);
+        } catch (Throwable $e) {
+            throw new DatabaseException('Couldn\'t connect to the database!');
+        }
 	}
 
 	public function __destruct()
@@ -24,15 +28,15 @@ final class MySqlDatabase implements DatabaseInterface
 		$this->connection = null;
 	}
 
-    /**
-     * {@inheritDoc}
-     */
 	public function Query(string $query, array $params = []): void
 	{
 		$this->cursor = $this->connection->prepare($query);
 
 		if (!$this->cursor) {
-			throw new Exception('Initialization of database cursor failed');
+			throw new DatabaseException(
+			    'Initialization of database cursor failed',
+                DatabaseException::CONNECTION_FAILED
+            );
 		}
 
 		foreach ($params as $key => $param) {
@@ -44,13 +48,10 @@ final class MySqlDatabase implements DatabaseInterface
 		}
 
 		if (!$this->cursor->execute()) {
-            throw new Exception($this->cursor->errorInfo()[2]);
+            throw new DatabaseException($this->cursor->errorInfo()[2], $this->cursor->errorInfo()[1]);
         }
 	}
 
-    /**
-     * {@inheritDoc}
-     */
 	public function getResult(): array
 	{
 		$result = [];
@@ -69,7 +70,7 @@ final class MySqlDatabase implements DatabaseInterface
 	}
 
     /**
-     * Selects data from a table.
+     * Selects backend from a table.
      */
     public function Select(
 		string $tableName,
@@ -167,13 +168,10 @@ final class MySqlDatabase implements DatabaseInterface
         $this->Query($query, $conditions);
     }
 
-    /**
-     * {@inheritDoc}
-     */
     public function Insert(string $table, array $fields): ?int
     {
         if (count($fields) === 0) {
-           throw new Exception('Row to insert is empty!');
+           throw new DatabaseException('Row to insert is empty!');
         }
 
         $fieldNames = implode(',', array_keys($fields));
@@ -198,9 +196,6 @@ final class MySqlDatabase implements DatabaseInterface
         return $lastInsertedId;
     }
 
-    /**
-     * {@inheritDoc}
-     */
     public function Update(string $table, array $fields, array $conditions): void
     {
         $conditionPairs = [];
@@ -227,9 +222,6 @@ final class MySqlDatabase implements DatabaseInterface
         $this->Query($query, array_merge($fields, $conditions));
     }
 
-    /**
-     * {@inheritDoc}
-     */
     public function Count(string $table, array $conditions = []): int
     {
         $result = $this->Select($table, ['count(*)'], $conditions);
@@ -260,9 +252,6 @@ final class MySqlDatabase implements DatabaseInterface
         $this->isTransactionOpen = false;
     }
 
-    /**
-     * {@inheritDoc}
-     */
     public function GetLastInsertedId(): int
     {
         $this->Query('SELECT LAST_INSERT_ID() as ID');

backend/classes/core/Router.php

@@ -29,6 +29,7 @@ final class Router
             if (count($matches[0]) > 0) {
                 $class = new ReflectionClass($params['controller']);
 
+                /** @var AbstractController $controller */
                 $controller = $class->newInstance($matches[0][0]);
 
                 if ($this->requestBody !== null && $this->contentType !== null) {

backend/classes/core/Session.php

@@ -24,10 +24,9 @@ final class Session
         }
     }
 
-    public function Destroy(): void
+    public function Destroy(): bool
     {
-        session_unset();
-        session_destroy();
+        return session_unset() && session_destroy();
     }
 
     public function Login(string $usernameOrEmail, string $password): bool

backend/classes/core/Table.php

@@ -236,7 +236,7 @@ abstract class Table
 	}
 
     /**
-     * Checks if the index is a valid data type.
+     * Checks if the index is a valid backend type.
      */
 	public static function IsValidType(int $type): bool
 	{

backend/classes/exception/DatabaseException.php

@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+final class DatabaseException extends Exception
+{
+    public const CONNECTION_FAILED = 1;
+}

backend/scripts/generate.php

@@ -0,0 +1,5 @@
+<?php
+
+require 'backend/classes/core/Autoloader.php';
+
+Autoloader::BuildCache();

data/classes/exception/DatabaseException.php

@@ -1,7 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-class DatabaseException extends Exception
-{
-}

data/scripts/generate.php

@@ -1,5 +0,0 @@
-<?php
-
-require 'data/classes/core/Autoloader.php';
-
-Autoloader::BuildCache();

index.php

@@ -1,5 +1,5 @@
 <?php
 
-require 'data/classes/core/Autoloader.php';
+require 'backend/classes/core/Autoloader.php';
 
-$autoloader = new Autoloader('data/cache');
+$autoloader = new Autoloader('backend/cache');