# BackgroundBuilder

[![.NET](https://img.shields.io/badge/.NET-8.0-blueviolet?logo=dotnet&logoColor=white)](https://dotnet.microsoft.com/) [![WPF](https://img.shields.io/badge/WPF-%23C8C8C8?logo=windows&logoColor=blue)](https://learn.microsoft.com/dotnet/desktop/wpf/) [![XAML](https://img.shields.io/badge/XAML-0C54C2?logo=xaml&logoColor=white)](https://learn.microsoft.com/dotnet/desktop/wpf/xaml/) [![C#](https://img.shields.io/badge/C%23-239120?logo=c-sharp&logoColor=white)](https://learn.microsoft.com/dotnet/csharp/) [![MVVM](https://img.shields.io/badge/Pattern-MVVM-ff69b4)](https://learn.microsoft.com/pt-br/dotnet/architecture/maui/mvvm) [![DI](https://img.shields.io/badge/DI-Microsoft.Extensions.Hosting-0078D7?logo=azure-devops&logoColor=white)](https://learn.microsoft.com/dotnet/core/extensions/dependency-injection) [![PostgreSQL](https://img.shields.io/badge/DB-PostgreSQL-4169E1?logo=postgresql&logoColor=white)](https://www.postgresql.org/) [![Npgsql](https://img.shields.io/badge/Driver-Npgsql-008bb9?logo=postgresql&logoColor=white)](https://www.npgsql.org/) [![Dapper](https://img.shields.io/badge/ORM-Dapper-0089D6)](https://github.com/DapperLib/Dapper) [![Windows](https://img.shields.io/badge/Platform-Windows-0078D6?logo=windows&logoColor=white)](https://www.microsoft.com/windows)

## 📝 Project description

> 🖥️ An MVVM WPF application (.NET 8) providing an Excel-like editor for the `contatos` table in PostgreSQL

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## 📑 Prerequisites

- [![.NET](https://img.shields.io/badge/.NET_8.0-blueviolet?logo=dotnet&logoColor=white)](https://dotnet.microsoft.com/)
- [![PostgreSQL](https://img.shields.io/badge/PostgreSQL-4169E1?logo=postgresql&logoColor=white)](https://www.postgresql.org/) **database**  with table:

```sql
  CREATE TABLE public.contatos (
      ramal text PRIMARY KEY NOT NULL,
      nome text NOT NULL,
      email text,
      area text,
      aniversario date,
      "isComando" boolean NOT NULL
  );
```

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## 🔧 Setup

1. ✏️ Edit `appsettings.json`, set your `ConnectionStrings:ContatosDb`.
2. 🖥️ In a terminal:

    ```bash
    dotnet restore
    dotnet build
    dotnet run --project BackgroundBuilder.csproj
    ```

3. 🪟 The main window will appear; on load it fetches and displays all contatos.

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## 🏗️ Architecture

- 🏛️ **MVVM** with `ObservableObject`, `RelayCommand`
- 🧩 **DI** via `Microsoft.Extensions.Hosting`
- 💾 **Repositories** (`PostgresContatoRepository`) handle all DB I/O with Dapper
- 🔌 **Services** (`DatabaseService`) manage the Npgsql connection
- 🧠 **ViewModels** free of data-access logic: only orchestration

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## 🚀 Releases

### 📆 21/05/2025: 🆕 Background & Export Features

- 🎨 **Select Background…**  
  Opens a file picker—choose any image (PNG, JPG, BMP). That image becomes your canvas.

- 🖼️ **Create Image…**  
  Saves the current DataGrid overlaid on the background as a single PNG.  
  Uses WPF’s `RenderTargetBitmap` and `PngBitmapEncoder` under the hood.

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