# Mariavel Backend - Database Management API

This is the backend API for Mariavel, built with Laravel 11. It provides a secure and robust abstraction layer for interacting with MariaDB/MySQL databases, managing schema metadata, and performing administrative operations.

## 🛠️ Core Responsibilities

- **Schema Discovery**: Dynamically fetches databases, tables, and column metadata using system catalogs (`information_schema`).
- **SQL Execution**: Executes raw SQL queries and returns structured data with row counts and execution metrics.
- **Administrative Operations**: Handles bulk table maintenance (Truncate, Drop, Optimize) and technical specifications.
- **Database Backups**: Integrates with system tools like `mysqldump` to generate full database exports.
- **Import Management**: Processes SQL files and ZIP archives, handling file extraction and sequence execution.
- **Data Transformation**: Maps database-specific types to frontend-friendly formats.

## 🏗️ Architecture & Structure

The backend follows a service-oriented architecture to ensure separation of concerns and database-agnostic potential:

### Controller Layer
- `app/Http/Controllers/Api/SchemaController.php`: Exposes REST endpoints for the frontend, handling request validation and response formatting.

### Service Layer (Abstraction)
- `app/Services/DatabaseService.php`: The main entry point for database operations. It orchestrates high-level tasks and manages driver interactions.

### Driver Layer (Implementation)
- `app/Services/Database/MySqlDriver.php`: Contains the concrete logic for MySQL/MariaDB. It encapsulates raw SQL generation and system command execution.

## 📂 Directory Structure

```
app/
├── Http/
│   └── Controllers/
│       └── Api/            # API Endpoints (SchemaController)
├── Services/
│   ├── Database/           # Driver implementations (MySqlDriver)
│   └── DatabaseService.php # Main database abstraction service
├── Models/                 # Eloquent models (if applicable)
└── Providers/              # Service providers for dependency injection
routes/
└── api.php                 # API route definitions
storage/
└── app/backups/            # Temporary storage for export/import files
```

## 🚥 Getting Started

### Prerequisites
- PHP 8.2+
- Composer
- MySQL/MariaDB server

### Installation

1. Install dependencies:
   ```bash
   composer install
   ```

2. Configure environment:
   ```bash
   cp .env.example .env
   php artisan key:generate
   ```

3. Update `.env` with your database credentials:
   ```env
   DB_CONNECTION=mysql
   DB_HOST=127.0.0.1
   DB_PORT=3306
   DB_DATABASE=your_database
   DB_USERNAME=your_username
   DB_PASSWORD=your_password
   ```

4. Run the development server:
   ```bash
   php artisan serve
   ```

## 🔒 Security

- All raw SQL execution is handled with caution.
- File operations are restricted to specific storage directories.
- Ensure the API is protected by authentication in production environments.