Add laundry notifications to Telegram

DeviceStatus/Service/LaundryMonitor.cs

@@ -0,0 +1,40 @@
+using RestSharp;
+
+namespace Service;
+
+public class LaundryMonitor
+{
+    private readonly RestClient _restClient = new();
+
+    private readonly string _botToken;
+    private readonly string _chatId;
+
+    public LaundryMonitor(IConfiguration configuration)
+    {
+        _botToken = configuration["Telegram:BotToken"];
+        _chatId = configuration["Telegram:ChatId"];
+    }
+
+    public async Task HandleDeviceMessage(Device device)
+    {
+        try
+        {
+            if (device.Name is not ("washer" or "dryer"))
+                return;
+
+            var status = device.Status ? "ON" : "OFF";
+
+            var message = $"The {device.Name} is now {status}.";
+
+            var encodedMessage = Uri.EscapeDataString(message);
+
+            var restRequest = new RestRequest($"https://api.telegram.org/bot{_botToken}/sendMessage?chat_id={_chatId}&text={encodedMessage}");
+
+            await _restClient.GetAsync(restRequest);
+        }
+        catch (Exception exception)
+        {
+            Console.WriteLine(exception);
+        }
+    }
+}

DeviceStatus/Service/MessageHandler.cs

@@ -1,8 +1,7 @@
-using System.Text.Json;
-using System.Text.Json.Serialization;
-using Microsoft.AspNetCore.SignalR.Client;
+using Microsoft.AspNetCore.SignalR.Client;
 using MQTTnet;
 using MQTTnet.Server;
+using System.Text.Json;
 
 namespace Service;
 
@@ -13,11 +12,13 @@ public class MessageHandler : IHostedService
 
     private readonly IConfiguration _configuration;
     private readonly DeviceRepository _deviceRepository;
+    private readonly LaundryMonitor _laundryMonitor;
 
-    public MessageHandler(IConfiguration configuration, DeviceRepository deviceRepository)
+    public MessageHandler(IConfiguration configuration, DeviceRepository deviceRepository, LaundryMonitor laundryMonitor)
     {
         _configuration = configuration;
         _deviceRepository = deviceRepository;
+        _laundryMonitor = laundryMonitor;
     }
 
     public async Task StartAsync(CancellationToken cancellationToken)
@@ -37,10 +38,13 @@ public class MessageHandler : IHostedService
 
     private async Task OnInterceptingPublishAsync(InterceptingPublishEventArgs arg)
     {
+        WriteLog($"{arg.ApplicationMessage.Topic}: {arg.ApplicationMessage.ConvertPayloadToString()}");
+
         _deviceRepository.HandleDeviceMessage(arg.ApplicationMessage.Topic, arg.ApplicationMessage.ConvertPayloadToString());
 
-        Console.WriteLine(arg.ApplicationMessage.Topic);
-        Console.WriteLine(arg.ApplicationMessage.ConvertPayloadToString());
+        var device = _deviceRepository[arg.ApplicationMessage.Topic];
+
+        await _laundryMonitor.HandleDeviceMessage(device);
 
         if (_hubConnection == null)
             return;
@@ -50,7 +54,7 @@ public class MessageHandler : IHostedService
             if (_hubConnection.State == HubConnectionState.Disconnected)
                 _hubConnection.StartAsync().Wait();
 
-            var json = JsonSerializer.Serialize(_deviceRepository[arg.ApplicationMessage.Topic]);
+            var json = JsonSerializer.Serialize(device);
 
             await _hubConnection.InvokeAsync("SendLatestStatus", json);
         }

DeviceStatus/Service/Program.cs

@@ -2,6 +2,8 @@ using Service;
 
 var builder = WebApplication.CreateBuilder(args);
 
+builder.Host.ConfigureAppConfiguration((_, config) => config.AddEnvironmentVariables());
+
 builder.Services.AddControllers();
 
 builder.Services.AddEndpointsApiExplorer();
@@ -10,6 +12,7 @@ builder.Services.AddSwaggerGen();
 builder.Services.AddHostedService<MessageHandler>();
 
 builder.Services.AddSingleton<DeviceRepository>();
+builder.Services.AddSingleton<LaundryMonitor>();
 
 var app = builder.Build();
 

DeviceStatus/Service/Service.csproj

@@ -12,6 +12,7 @@
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="6.0.8" />
     <PackageReference Include="MQTTnet" Version="4.1.0.247" />
     <PackageReference Include="MQTTnet.AspNetCore" Version="4.1.0.247" />
+    <PackageReference Include="RestSharp" Version="108.0.1" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
   </ItemGroup>
 

DeviceStatus/Service/appsettings.Development.json

@@ -7,5 +7,9 @@
     },
     "Hub": {
         "DeviceStatus": "http://localhost:5000/device-status"
+    },
+    "Telegram": {
+        "BotToken": "",
+        "ChatId": ""
     }
 }

DeviceStatus/Service/appsettings.json

@@ -8,5 +8,9 @@
     "AllowedHosts": "*",
     "Hub": {
         "DeviceStatus": "http://hub-server/device-status"
+    },
+    "Telegram": {
+        "BotToken": "",
+        "ChatId": ""
     }
 }

DeviceStatus/Service/deploy/manifest.yaml

@@ -27,6 +27,16 @@ spec:
         env:
         - name: Hub__DeviceStatus
           value: http://hub-service/device-status
+        - name: Telegram__BotToken
+          valueFrom:
+            secretKeyRef:
+              name: telegram
+              key: bot-token 
+        - name: Telegram__ChatId
+          valueFrom:
+            secretKeyRef:
+              name: telegram
+              key: chat-id 
       restartPolicy: Always
       terminationGracePeriodSeconds: 30
       dnsPolicy: ClusterFirst