AddressBook is an ASP.NET Core Web API which provides a public address book (contacts) functionality.

• contacts need to contain name, date of birth, address and multiple telephone numbers
• contacts need to be unique by name and address
• creating, updating and deleting contacts
• providing access to single and multiple contacts (with pagination)
• provide a way of receiveing live updates for connected clients using SignalR

• Visual Studio 2019
• .NET Core 3.0.1 SDK
• PostgreSQL

• .NET Core 3.0
• Entity Framework Core 3.1.0
• Npgsql 3.1.0
• Automapper

The architecture patterns used for this application are based on DDD (Domain-Driven Design) approach.

• POCO entity classes
• DTOs
• Repository interfaces
• Services

• Data persistance infrastructure: repository implementations
• ORM: Entity Framework Core

• ASP.NET Core Web API
• Application contracts and implementation
• MVC filters
• API Models
• Hubs

• Open solution in Visual Studio
• Open the appsettings.json file from AddressBook.Api
• Add the connectionstring for PostgreSQL connection string

{
  "ConnectionStrings": {
    "DefaultConnection": "Host=localhost;Port=5432;Username=postgres;Password=password;Database=AddressBookDB;"
  }
}

• In the the Package Manager console:
  • Select Default Project: AddressBook.Infrastructure
  • Run update-database

NotificationHub is responsible for handling messages from clients and broadcasting them to all connected clients.

The BroadcastMessage method can be called by a connected client to send a message to all clients.