Redis fonctionnel ... mais on ne peut pas avoir les dessins passés quand on ouvre. (Pas de persistence)

BlazorCanvas/BlazorCanvas.Server/Components/Data/CanvasService.cs

@@ -5,13 +5,7 @@ using Microsoft.AspNetCore.Components;
 using Microsoft.JSInterop;
 using Newtonsoft.Json.Linq;
 using Newtonsoft.Json;
-using System.Drawing;
-using System.Threading;
-using Microsoft.AspNetCore.Mvc.ApplicationModels;
-using Microsoft.AspNetCore.Connections;
-using Aspire.StackExchange.Redis;
 using StackExchange.Redis;
-using System.Runtime.CompilerServices;
 
 namespace BlazorCanvas.Server.Components.Data;
 
@@ -21,11 +15,14 @@ public class CanvasService {
     private Canvas2DContext? _currentCanvasContext;
     private IJSRuntime _jsRuntime;
     private IConnectionMultiplexer _cache;
+    private ChannelMessageQueue _channel;
     private CanvasCommand _lastCommand = new();
+    private bool _is_started = false;
 
     public CanvasService(IJSRuntime jsRuntime, IConnectionMultiplexer cache) {
         _jsRuntime = jsRuntime;
         _cache = cache;
+        _channel = _cache.GetSubscriber().Subscribe(RedisChannel.Literal("lol"));
     }
 
     public string currentColor { get; set; } = "Black";
@@ -34,7 +31,16 @@ public class CanvasService {
     public ElementReference divCanvas { get; set; }
     public BECanvasComponent myCanvas { get; set; } = new();
 
-    // TODO: Dessiner à partir des commandes de Franz.
+    public async void Consume() {
+        CancellationToken cToken = new();
+        
+        while (!cToken.IsCancellationRequested) {
+            var mess = await _channel.ReadAsync(cToken);
+            var comm = JsonConvert.DeserializeObject<CanvasCommand>(mess.Message);
+            if (comm is not null)
+                Draw(comm);
+        }
+    }
 
     public async void Draw(IEnumerable<CanvasCommand> lsCommand) {
         if (_currentCanvasContext is null) {
@@ -61,6 +67,11 @@ public class CanvasService {
     public async void HandleMouse(MouseEventArgs eventArgs) {
         double mouseX = 0, mouseY = 0;
 
+        if (!_is_started) { 
+            Consume();
+            _is_started = true;
+        }
+
         if (eventArgs.Buttons == 0 || eventArgs.Buttons > 2)
             return; // Rien faire si aucun bouton est appuyé ou si les deux boutons/ d'autres boutons sont appuyés.
 
@@ -83,7 +94,7 @@ public class CanvasService {
                 mouseX -= mouseX % pointSize;
                 mouseY -= mouseY % pointSize;
             }
-            
+        
             command.X = mouseX;
             command.Y = mouseY;
             command.Color = color;
@@ -91,10 +102,11 @@ public class CanvasService {
 
             if (command.Equals(_lastCommand))
                 return; // Pour pas spammer des commandes si c'est pas pertinent.
-
-            // TODO: Shipper les commandes à Franz.
             
-            Draw(command);
+            // TODO: Shipper les commandes à Franz.
+            _cache.GetSubscriber().Publish(RedisChannel.Literal("lol"), JsonConvert.SerializeObject(command));
+
+            //Draw(command);
 
             _lastCommand = command;
         }

BlazorCanvas/BlazorCanvas.Server/Program.cs

@@ -10,7 +10,7 @@ builder.AddServiceDefaults();
 // Add services to the container.
 builder.Services.AddRazorComponents()
     .AddInteractiveServerComponents();
-builder.AddRedisOutputCache("cache");
+builder.AddRedis("cache");
 
 builder.Services.AddScoped<CanvasService>();