fix(): implement filter on PostgresChangeHandler

Realtime/Binding.cs

@@ -0,0 +1,15 @@
+using Supabase.Realtime.Interfaces;
+using Supabase.Realtime.PostgresChanges;
+
+namespace Supabase.Realtime;
+
+public class Binding
+{
+    public PostgresChangesOptions? Options { get; set; }
+
+    public IRealtimeChannel.PostgresChangesHandler? Handler { get; set; }
+
+    public PostgresChangesOptions.ListenType? ListenType { get; set; }
+
+    public int? Id { get; set; }
+}

Realtime/PostgresChanges/PostgresChangesOptions.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using System;
+using Newtonsoft.Json;
 using Supabase.Core.Attributes;
 using System.Collections.Generic;
 
@@ -78,7 +79,7 @@
     /// </summary>
     [JsonProperty("event")]
     public string Event => Core.Helpers.GetMappedToAttr(_listenType).Mapping!;
-
+    
     private readonly ListenType _listenType;
 
     /// <summary>
@@ -97,4 +98,29 @@
         Filter = filter;
         Parameters = parameters;
     }
+
+    private bool Equals(PostgresChangesOptions other)
+    {
+        return _listenType == other._listenType && Schema == other.Schema && Table == other.Table && Filter == other.Filter;
+    }
+
+    public override bool Equals(object? obj)
+    {
+        if (obj is null) return false;
+        if (ReferenceEquals(this, obj)) return true;
+        if (obj.GetType() != GetType()) return false;
+        return Equals((PostgresChangesOptions)obj);
+    }
+
+    public override int GetHashCode()
+    {
+        unchecked
+        {
+            var hashCode = (int)_listenType;
+            hashCode = (hashCode * 397) ^ Schema.GetHashCode();
+            hashCode = (hashCode * 397) ^ (Table != null ? Table.GetHashCode() : 0);
+            hashCode = (hashCode * 397) ^ (Filter != null ? Filter.GetHashCode() : 0);
+            return hashCode;
+        }
+    }
 }

Realtime/PostgresChanges/PostgresChangesResponse.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using System.Collections.Generic;
+using Newtonsoft.Json;
 using Supabase.Postgrest.Models;
 using Supabase.Realtime.Socket;
 
@@ -73,4 +74,7 @@
     /// </summary>
     [JsonProperty("data")]
     public SocketResponsePayload<T>? Data { get; set; }
+
+    [JsonProperty("ids")]
+    public List<int?> Ids { get; set; }
 }

Realtime/RealtimeChannel.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using System.Timers;
@@ -162,6 +163,8 @@ public class RealtimeChannel : IRealtimeChannel
     private readonly Timer _rejoinTimer;
     private bool _isRejoining;
 
+    private List<Binding> _bindings = [];
+
     /// <summary>
     /// Initializes a Channel - must call `Subscribe()` to receive events.
     /// </summary>
@@ -331,10 +334,12 @@ private void NotifyMessageReceived(SocketResponse message)
     public void AddPostgresChangeHandler(ListenType listenType, PostgresChangesHandler postgresChangeHandler)
     {
         if (!_postgresChangesHandlers.ContainsKey(listenType))
-            _postgresChangesHandlers[listenType] = new List<PostgresChangesHandler>();
+            _postgresChangesHandlers[listenType] = [];
 
-        if (!_postgresChangesHandlers[listenType].Contains(postgresChangeHandler))
-            _postgresChangesHandlers[listenType].Add(postgresChangeHandler);
+        if (_postgresChangesHandlers[listenType].Contains(postgresChangeHandler)) return;
+
+        _postgresChangesHandlers[listenType].Add(postgresChangeHandler);
+        BindPostgresChangesHandler(listenType, postgresChangeHandler);
     }
 
     /// <summary>
@@ -346,14 +351,20 @@ public void RemovePostgresChangeHandler(ListenType listenType, PostgresChangesHa
     {
         if (_postgresChangesHandlers.ContainsKey(listenType) &&
             _postgresChangesHandlers[listenType].Contains(postgresChangeHandler))
+        {
             _postgresChangesHandlers[listenType].Remove(postgresChangeHandler);
+            RemovePostgresChangesFromBinding(listenType, postgresChangeHandler);
+        }
     }
 
     /// <summary>
     /// Clears all postgres changes listeners.
     /// </summary>
-    public void ClearPostgresChangeHandlers() =>
-        _postgresChangesHandlers.Clear();
+    public void ClearPostgresChangeHandlers()
+    {
+        _postgresChangesHandlers.Clear();   
+        _bindings.Clear();
+    }
 
     /// <summary>
     /// Adds an error event handler.
@@ -407,15 +418,7 @@ private void NotifyPostgresChanges(EventType eventType, PostgresChangesResponse
             _ => ListenType.All
         };
 
-        // Invoke the wildcard listener (but only once)
-        if (listenType != ListenType.All &&
-            _postgresChangesHandlers.TryGetValue(ListenType.All, out var changesHandler))
-            foreach (var handler in changesHandler.ToArray())
-                handler.Invoke(this, response);
-
-        if (_postgresChangesHandlers.TryGetValue(listenType, out var postgresChangesHandler))
-            foreach (var handler in postgresChangesHandler.ToArray())
-                handler.Invoke(this, response);
+        InvokeProperlyHandlerFromBind(listenType, response);
     }
 
     /// <summary>
@@ -428,6 +431,8 @@ private void NotifyPostgresChanges(EventType eventType, PostgresChangesResponse
     public IRealtimeChannel Register(PostgresChangesOptions postgresChangesOptions)
     {
         PostgresChangesOptions.Add(postgresChangesOptions);
+
+        BindPostgresChangesOptions(postgresChangesOptions);
         return this;
     }
 
@@ -673,6 +678,8 @@ private void HandleJoinResponse(IRealtimePush<RealtimeChannel, SocketResponse> s
             Options.SerializerSettings);
         if (obj?.Payload == null) return;
 
+        obj.Payload.Response?.change?.ForEach(BindIdPostgresChanges);
+
         switch (obj.Payload.Status)
         {
             // A response was received from the channel
@@ -764,4 +771,97 @@ internal void HandleSocketMessage(SocketResponse message)
                 break;
         }
     }
+
+    /// <summary>
+    /// Create a Binding and add to a list
+    /// </summary>
+    /// <param name="options"></param>
+    private void BindPostgresChangesOptions(PostgresChangesOptions options)
+    {
+        var founded = _bindings.FirstOrDefault(b => options.Equals(b.Options));
+        if (founded != null) return;
+
+        _bindings.Add(
+            new Binding
+            {
+                Options = options,
+            }
+        );
+    }
+
+    /// <summary>
+    /// Try to bind a PostgresChangesHandler to a PostgresChangesOptions
+    /// </summary>
+    /// <param name="listenType"></param>
+    /// <param name="handler"></param>
+    private void BindPostgresChangesHandler(ListenType listenType, PostgresChangesHandler handler)
+    {
+        var founded = _bindings.FirstOrDefault(b =>
+            (b.Options?.Event == Core.Helpers.GetMappedToAttr(listenType).Mapping || b.Options?.Event == "*") && 
+            b.Handler == null
+        );
+        if (founded == null) return;
+
+        founded.Handler = handler;
+        founded.ListenType = listenType;
+    }
+
+    /// <summary>
+    /// Filter the binding list and try to add an id from socket to its binding
+    /// </summary>
+    /// <param name="joinResponse"></param>
+    private void BindIdPostgresChanges(PhoenixPostgresChangeResponse joinResponse)
+    {
+        var founded = _bindings.FirstOrDefault(b => b.Options != null &&
+                                                    b.Options.Event == joinResponse.eventName &&
+                                                    b.Options.Table == joinResponse.table &&
+                                                    b.Options.Schema == joinResponse.schema &&
+                                                    b.Options.Filter == joinResponse.filter);
+        if (founded == null) return;
+        founded.Id = joinResponse?.id;
+    }
+
+    /// <summary>
+    /// Try to invoke the handler properly based on event type and socket response 
+    /// </summary>
+    /// <param name="eventType"></param>
+    /// <param name="response"></param>
+    private void InvokeProperlyHandlerFromBind(ListenType eventType, PostgresChangesResponse response)
+    {
+        var all = _bindings.FirstOrDefault(b =>
+        {
+            if (b.Options == null && response.Payload == null && b.Handler == null) return false;
+
+            return response.Payload != null && response.Payload.Ids.Contains(b.Id) && eventType != ListenType.All &&
+                   b.ListenType == ListenType.All;
+        });
+
+        if (all != null)
+        {
+            all.Handler?.Invoke(this, response);
+            return;
+        }
+
+        // Invoke specific handler
+        var result = _bindings.FirstOrDefault(b =>
+        {
+            if (b.Options == null && response.Payload == null && b.Handler == null) return false;
+
+            return response.Payload != null && response.Payload.Ids.Contains(b.Id) && b.ListenType == eventType;
+        });
+
+        result?.Handler?.Invoke(this, response);
+    }
+
+    /// <summary>
+    /// Remove handler from binding
+    /// </summary>
+    /// <param name="eventType"></param>
+    /// <param name="handler"></param>
+    private void RemovePostgresChangesFromBinding(ListenType eventType, PostgresChangesHandler handler)
+    {
+        var binding = _bindings.FirstOrDefault(b => b.Handler == handler && b.ListenType == eventType);
+        if (binding == null) return;
+        _bindings.Remove(binding);
+    }
 }

Realtime/RealtimeSocket.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Net.WebSockets;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
@@ -88,6 +89,7 @@ public RealtimeSocket(string endpoint, ClientOptions options)
         _connection = new WebsocketClient(new Uri(EndpointUrl), () =>
         {
             var socket = new ClientWebSocket();
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Create("BROWSER"))) return socket;
 
             foreach (var header in Headers)
                 socket.Options.SetRequestHeader(header.Key, header.Value);

Realtime/Socket/Responses/PhoenixPostgresChangeResponse.cs

@@ -0,0 +1,21 @@
+using Newtonsoft.Json;
+
+namespace Supabase.Realtime.Socket.Responses;
+
+public class PhoenixPostgresChangeResponse
+{
+    [JsonProperty("id")]
+    public int? id { get; set; }
+
+    [JsonProperty("event")]
+    public string? eventName { get; set; }
+
+    [JsonProperty("filter")]
+    public string? filter { get; set; }
+
+    [JsonProperty("schema")]
+    public string? schema { get; set; }
+
+    [JsonProperty("table")]
+    public string? table { get; set; }
+}

Realtime/Socket/Responses/PhoenixResponse.cs

@@ -11,7 +11,7 @@ public class PhoenixResponse
     /// The response.
     /// </summary>
     [JsonProperty("response")]
-    public object? Response;
+    public PostgresChangeResponse? Response;
 
     /// <summary>
     /// The status.

Realtime/Socket/Responses/PostgresChangeResponse.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace Supabase.Realtime.Socket.Responses;
+
+public class PostgresChangeResponse
+{
+   [JsonProperty("postgres_changes")] 
+   public List<PhoenixPostgresChangeResponse> change { get; set; }
+}