HADotNet

A simple, straighforward .NET Standard library for the Home Assistant API.

Features

.NET Standard 2.0 cross-platform library
DI-friendly client initialization (suitable for ASP.NET Core)
Home Assistant data is represented by strongly-typed, commented model classes

Supported Home Assistant APIs

Root API (Verifies the HA API is responding)
Automation API
Google Calendar API (Unofficial)
Discovery API
Config API
Camera Proxy API
Entity API
Error Log API
Events API
History API
Logbook API
Services API
States API
Supervisor API (Supervisor-based installations only)
Template API

Getting Started

From NuGet (Recommended)

Install HADotNet.Core from NuGet:

Install-Package HADotNet.Core

From Source

Clone this repo and either include the HADotNet.Core library in your project, or build the project and include the DLL as a reference.

Examples

Initializing The Client Factory

The ClientFactory class is reponsible for initializing all other clients in a reusable way, so you only have to define your instance URL and API key once.

To initialize the ClientFactory, pass in your base Home Assistant URL and a long-lived access token that you created on your profile page.

ClientFactory.Initialize("https://my-home-assistant-url/", "AbCdEf0123456789...");

Integrating into an ASP.NET Core Site

First, call ClientFactory.Initialize(...); to ensure that your Home Assistant instance is connected. You can do this in ConfigureServices, or using middleware.

Just be sure that the client factory has been initialized before any page/controller requests are made.

You can add individual clients to the DI container like so:

services.AddScoped(_ => ClientFactory.GetClient<EntityClient>());
services.AddScoped(_ => ClientFactory.GetClient<StatesClient>());
services.AddScoped(_ => ClientFactory.GetClient<ServiceClient>());
services.AddScoped(_ => ClientFactory.GetClient<DiscoveryClient>());

Since there are no interfaces, simply add the instance(s) directly into the container. Add as few or as many clients as you need, and then simply retrieve each client via the DI container as-needed.

public class MyController : Controller
{
	private IOtherService SampleService { get; }
	private EntityClient EntityClient { get; }

	public MyController(IOtherService sampleService, EntityClient entityClient)
	{
		SampleService = sampleService;
		EntityClient = entityClient;
	}

	// ...
}

Getting Home Assistant's Current Configuration

Get a ConfigClient and then call GetConfiguration():

var configClient = ClientFactory.GetClient<ConfigClient>();
var config = await configClient.GetConfiguration();
// config.LocationName: "Home"
// config.Version: 0.96.1

Retrieving All Entities

Get an EntityClient and then call GetEntities():

var entityClient = ClientFactory.GetClient<EntityClient>();
var entityList = await entityClient.GetEntities();

Retrieving Entities By Domain

Get an EntityClient and then call GetEntities("domainName"):

var entityClient = ClientFactory.GetClient<EntityClient>();
var filteredEntityList = await entityClient.GetEntities("light");

Retrieving All Entity States

Get a StatesClient and then call GetStates():

var statesClient = ClientFactory.GetClient<StatesClient>();
var allMyStates = await statesClient.GetStates();

Retrieving State By Entity

Get a StatesClient and then call GetState(entity):

var statesClient = ClientFactory.GetClient<StatesClient>();
var state = await statesClient.GetState("sun.sun");
// state.EntityId: "sun.sun"
// state.State: "below_horizon"

Retrieving All Service Definitions

Get a ServiceClient and then call GetServices():

var serviceClient = ClientFactory.GetClient<ServiceClient>();
var services = await serviceClient.GetServices();

Retrieving Calendar Events

Get a CalendarClient and then call GetEvents(calEntity):

var calClient = ClientFactory.GetClient<CalendarClient>();
var myEvents = await calClient.GetEvents("calendar.my_calendar");

Calling a Service

Get a ServiceClient and then call CallService():

var serviceClient = ClientFactory.GetClient<ServiceClient>();

var resultingState = await serviceClient.CallService("homeassistant", "restart");
// Or
var resultingState = await serviceClient.CallService("light", "turn_on", new { entity_id = "light.my_light" });
// Or
var resultingState = await serviceClient.CallService("light.turn_on", new { entity_id = "light.my_light" });
// Or
var resultingState = await serviceClient.CallService("light.turn_on", @"{""entity_id"":""light.my_light""}");

Retrieving History for an Entity

Get a HistoryClient and then call GetHistory(entityId):

var historyClient = ClientFactory.GetClient<HistoryClient>();
var historyList = await historyClient.GetHistory("sun.sun");

// historyList.EntityId: "sun.sun"
// historyList[0].State: "above_horizon"
// historyList[0].LastUpdated: 2019-07-25 07:25:00
// historyList[1].State: "below_horizon"
// historyList[1].LastUpdated: 2019-07-25 20:06:00

Rendering a Template

Get a TemplateClient and then call RenderTemplate(templateBody):

var templateClient = ClientFactory.GetClient<TemplateClient>();
var myRenderedTemplate = await templateClient.RenderTemplate("The sun is {{ states('sun.sun') }}");

// myRenderedTemplate: The sun is above_horizon

Retrieving a Camera Image

Get a CameraProxyClient and then call GetCameraImage, or for a ready-to-go HTML Base64 string, GetCameraImageAsBase64:

var cameraClient = ClientFactory.GetClient<CameraProxyClient>();
var myCameraImage = await cameraClient.GetCameraImageAsBase64("camera.my_camera");

// myCameraImage: "data:image/jpg;base64,AAAAAAAAA..."

Testing

To run the unit tests, you must first set two environment variables:

HADotNet:Tests:Instance = https://my-home-assistant-url/
HADotNet:Tests:ApiKey = AbCdEf0123456789...

Collaborating

Fork the project, make some changes, and submit a pull request!

Be sure to follow the same coding style (generally, the standard Microsoft C# coding guidelines) and comment all publicly-visible types and members with XMLDoc comments.

qJake/HADotNet