Refactor code structure for improved readability and maintainability

dotnet/src/TwitchArchive.Web/Pages/Index.razor

@@ -0,0 +1,64 @@
+@page "/"
+@inject TwitchArchive.Core.Workers.StreamWorkerManager WorkerManager
+@inject TwitchArchive.Web.Services.SessionCacheService SessionCache
+
+<h2>Dashboard</h2>
+
+<div class="cards">
+	@foreach (var s in streamers)
+	{
+		<div class="card">
+			<div class="card-header">
+				<a href="/streamer/@s">@s</a>
+				<span class="badge">@(WorkerManager.IsRunning(s) ? "Live" : "Offline")</span>
+			</div>
+			<div class="card-body">
+				<div>Last session: @(lastStarts.ContainsKey(s) ? lastStarts[s].ToLocalTime().ToString() : "-")</div>
+				<div class="actions">
+					<button @onclick="() => Start(s)">Start</button>
+					<button @onclick="() => Stop(s)">Stop</button>
+				</div>
+			</div>
+		</div>
+	}
+</div>
+
+@code {
+    private List<string> streamers = new();
+    private Dictionary<string, DateTime> lastStarts = new();
+
+    private void OnCacheUpdatedHandler()
+    {
+        _ = InvokeAsync(() => {
+            lastStarts = SessionCache.GetSnapshot();
+            StateHasChanged();
+        });
+    }
+
+	protected override async Task OnInitializedAsync()
+	{
+        LoadStreamers();
+        lastStarts = SessionCache.GetSnapshot();
+        SessionCache.Updated += OnCacheUpdatedHandler;
+	}
+
+	private void LoadStreamers()
+	{
+		var cfgDir = Path.Combine(Environment.CurrentDirectory, "config", "streamers");
+		if (Directory.Exists(cfgDir))
+		{
+			streamers = Directory.GetFiles(cfgDir, "*.json").Select(f => Path.GetFileNameWithoutExtension(f)).ToList();
+		}
+	}
+
+    // Index reads from the singleton SessionCacheService; updates are pushed via the Updated event.
+
+	private void Start(string u) { WorkerManager.StartWorker(u); }
+	private async Task Stop(string u) { await WorkerManager.StopWorkerAsync(u); }
+
+    public async ValueTask DisposeAsync()
+    {
+        SessionCache.Updated -= OnCacheUpdatedHandler;
+        await Task.CompletedTask;
+    }
+}