Merge branch 'maui' of https://github.com/powersync-ja/powersync-dotnet into maui

Author: Chriztiaan

demos/TodoSQLite/Data/NodeConnector.cs

@@ -13,16 +13,17 @@ namespace TodoSQLite.Data;
 
 public class NodeConnector : IPowerSyncBackendConnector
 {
-    private readonly HttpClient httpClient;
+    private static readonly string StorageFilePath = "user_id.txt"; // Simulating local storage
+    private readonly HttpClient _httpClient;
 
     public string BackendUrl { get; }
     public string PowerSyncUrl { get; }
-    public string UserId { get; }
+    public string UserId { get; private set; }
     private string? clientId;
 
     public NodeConnector()
     {
-        httpClient = new HttpClient();
+        _httpClient = new HttpClient();
 
         // Load or generate User ID
         UserId = LoadOrGenerateUserId();
@@ -35,15 +36,22 @@ public NodeConnector()
 
     public string LoadOrGenerateUserId()
     {
-        return "8ba3ec38-6cc8-449c-88c0-9275987ea5d2";
+        if (File.Exists(StorageFilePath))
+        {
+            return File.ReadAllText(StorageFilePath);
+        }
+
+        string newUserId = Guid.NewGuid().ToString();
+        File.WriteAllText(StorageFilePath, newUserId);
+        return newUserId;
     }
 
     public async Task<PowerSyncCredentials?> FetchCredentials()
     {
-        var tokenEndpoint = "api/auth/token";
-        var url = $"{BackendUrl}/{tokenEndpoint}?user_id={UserId}";
+        string tokenEndpoint = "api/auth/token";
+        string url = $"{BackendUrl}/{tokenEndpoint}?user_id={UserId}";
 
-        var response = await httpClient.GetAsync(url);
+        HttpResponseMessage response = await _httpClient.GetAsync(url);
         if (!response.IsSuccessStatusCode)
         {
             throw new Exception($"Received {response.StatusCode} from {tokenEndpoint}: {await response.Content.ReadAsStringAsync()}");
@@ -98,7 +106,7 @@ public async Task UploadData(IPowerSyncDatabase database)
             var payload = JsonSerializer.Serialize(new { batch });
             var content = new StringContent(payload, Encoding.UTF8, "application/json");
 
-            HttpResponseMessage response = await httpClient.PostAsync($"{BackendUrl}/api/data", content);
+            HttpResponseMessage response = await _httpClient.PostAsync($"{BackendUrl}/api/data", content);
 
             if (!response.IsSuccessStatusCode)
             {

demos/TodoSQLite/README.md

@@ -0,0 +1,16 @@
+# .NET MAUI ToDo List Demo App
+
+## To test (we currently recommend testing on iOS):
+1. You need to have one of our Node.js self-host demos ([Postgres](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs) | [MongoDB](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs-mongodb) | [MySQL](https://github.com/powersync-ja/self-host-demo/tree/main/demos/nodejs-mysql)) running, as it provides the PowerSync server that this demo's SDK connects to.
+2. In the root directly run:
+   1. `dotnet run --project Tools/Setup`
+   2. `dotnet restore`
+3. cd into this directory: `* cd demos/TodoSQLite `
+4. run `dotnet build -t:Run -f:net8.0-ios`
+   1. Or specify an iOS simulator identifier e.g.: `dotnet build -t:Run -f:net8.0-ios -p:_DeviceName=:v2:udid=B1CA156A-56FC-4C3C-B35D-4BC349111FDF`
+5. Changes made to the backend's source DB (inspect via a tool like `psql`) or to the self-hosted aapp's web UI will be synced to this iOS client (and vice versa)
+
+## Current known issues:
+* Switching from offline to online mode isn't yet handled
+* Android has some instability
+

demos/TodoSQLite/Views/TodoListPage.xaml.cs

@@ -23,7 +23,7 @@ protected override async void OnAppearing()
     {
         base.OnAppearing();
 
-        await database.Db.Watch("select * from todos", null, new WatchHandler<TodoItem>
+        await database.Db.Watch("select * from todos where list_id = ?", [selectedList.ID], new WatchHandler<TodoItem>
         {
             OnResult = (results) =>
             {