Add NamespacedId and converters

JetHerald/DapperMappers.cs

@@ -0,0 +1,25 @@
+using System.Data;
+
+using Dapper;
+
+namespace JetHerald
+{
+    public static class DapperConverters
+    {
+        static bool registered = false;
+        public static void Register()
+        {
+            if (registered)
+                return;
+            registered = true;
+
+            SqlMapper.AddTypeHandler(new NamespacedIdHandler());
+        }
+
+        class NamespacedIdHandler : SqlMapper.TypeHandler<NamespacedId>
+        {
+            public override void SetValue(IDbDataParameter parameter, NamespacedId value) => parameter.Value = value.ToString();
+            public override NamespacedId Parse(object value) => new NamespacedId((string)value);
+        }
+    }
+}

JetHerald/NamespacedId.cs

@@ -0,0 +1,47 @@
+using System;
+
+namespace JetHerald
+{
+    public struct NamespacedId 
+    {
+        public string Namespace { get; init; }
+        public string Id { get; init; }
+        
+        public NamespacedId(string str)
+        {
+            var ind = str.IndexOf("://");
+            if (ind < 0) throw new ArgumentException("Could not parse namespaced id");
+            Namespace = str[..ind].ToLowerInvariant();
+            Id = str[(ind + 3)..];
+        }
+
+        public NamespacedId(string ns, string id)
+        {
+            Namespace = ns;
+            Id = id;
+        }
+
+        public static NamespacedId Telegram(long id)
+            => new NamespacedId("telegram", $"{id}");
+
+        public static NamespacedId Discord(ulong id)
+            => new NamespacedId("discord", $"{id}");   
+
+        public override string ToString() => $"{Namespace}://{Id}";
+
+        public override int GetHashCode() => HashCode.Combine(Namespace, Id);
+
+        public override bool Equals(object obj)
+            => obj is NamespacedId nsid && this == nsid;
+
+        public static bool operator == (NamespacedId a, NamespacedId b)
+            => a.Namespace == b.Namespace && a.Id == b.Id;
+
+        public static bool operator !=(NamespacedId a, NamespacedId b)
+            => !(a == b);
+
+    }
+
+
+
+}

JetHerald/Program.cs

@@ -15,6 +15,8 @@ namespace JetHerald
     {
         public static void Main(string[] args)
         {
+            DapperConverters.Register();
+
             var logger = NLog.Web.NLogBuilder.ConfigureNLog("NLog.config").GetCurrentClassLogger();
             try
             {