1 files changed, 27 insertions, 0 deletions
diff --git a/LibMatrix/StructuredData/UserId.cs b/LibMatrix/StructuredData/UserId.cs
new file mode 100644
index 0000000..02b2e91
--- /dev/null
+++ b/LibMatrix/StructuredData/UserId.cs
@@ -0,0 +1,27 @@
+namespace LibMatrix.StructuredData;
+
+public class UserId {
+    public required string ServerName { get; set; }
+    public required string LocalPart { get; set; }
+
+    public static UserId Parse(string mxid) {
+        if (!mxid.StartsWith('@')) throw new ArgumentException("Matrix User IDs must start with '@'", nameof(mxid));
+        var parts = mxid.Split(':', 2);
+        if (parts.Length != 2) throw new ArgumentException($"Invalid MXID '{mxid}' passed! MXIDs must exist of only 2 parts!", nameof(mxid));
+        return new UserId {
+            LocalPart = parts[0][1..],
+            ServerName = parts[1]
+        };
+    }
+
+    public static implicit operator UserId(string mxid) => Parse(mxid);
+    public static implicit operator string(UserId mxid) => $"@{mxid.LocalPart}:{mxid.ServerName}";
+    public static implicit operator (string, string)(UserId mxid) => (mxid.LocalPart, mxid.ServerName);
+    public static implicit operator UserId((string localPart, string serverName) mxid) => (mxid.localPart, mxid.serverName);
+    // public override string ToString() => $"mxc://{ServerName}/{MediaId}";
+
+    public void Deconstruct(out string serverName, out string localPart) {
+        serverName = ServerName;
+        localPart = LocalPart;
+    }
+}
\ No newline at end of file