Add Ping backend

.NET 10 solution for Ping, a Discord style chat app: Domain, Application and Infrastructure projects plus the Api host. SignalR for chat and presence, LiveKit for call tokens, EF Core on Postgres, S3 compatible storage for attachments, and OIDC auth shared with the Musify Zitadel instance. Includes the Compose stack for local development.
2026-09-21 19:32:55 +02:00
commit 0623875dfa
126 changed files with 5048 additions and 0 deletions
@@ -0,0 +1,38 @@
+using System.Globalization;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Ping.Application.Serialization
+{
+    public sealed class LongAsStringConverter : JsonConverter<long>
+    {
+        public override long Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) =>
+            reader.TokenType == JsonTokenType.String
+                ? long.Parse(reader.GetString()!, CultureInfo.InvariantCulture)
+                : reader.GetInt64();
+
+        public override void Write(Utf8JsonWriter writer, long value, JsonSerializerOptions options) =>
+            writer.WriteStringValue(value.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public sealed class NullableLongAsStringConverter : JsonConverter<long?>
+    {
+        public override long? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.Null)
+                return null;
+
+            return reader.TokenType == JsonTokenType.String
+                ? string.IsNullOrEmpty(reader.GetString()) ? null : long.Parse(reader.GetString()!, CultureInfo.InvariantCulture)
+                : reader.GetInt64();
+        }
+
+        public override void Write(Utf8JsonWriter writer, long? value, JsonSerializerOptions options)
+        {
+            if (value.HasValue)
+                writer.WriteStringValue(value.Value.ToString(CultureInfo.InvariantCulture));
+            else
+                writer.WriteNullValue();
+        }
+    }
+}