1 files changed, 22 insertions, 0 deletions
diff --git a/matrix-specification/Responses/ClientUserIdFilterPostResponse.php b/matrix-specification/Responses/ClientUserIdFilterPostResponse.php
new file mode 100644
index 0000000..ed7ba37
--- /dev/null
+++ b/matrix-specification/Responses/ClientUserIdFilterPostResponse.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Matrix\Responses;
+
+class ClientUserIdFilterPostResponse implements \JsonSerializable
+{
+  public function __construct(
+    private string $filterId,
+  )
+  {
+    if (str_starts_with($filterId, "{")) {
+      throw new \InvalidArgumentException("filterId cannot start with a { as this character is used to determine if the filter provided is inline JSON or a previously declared filter by homeservers on some APIs");
+    }
+  }
+
+  public function jsonSerialize(): array
+  {
+    return [
+      "filter_id" => $this->filterId,
+    ];
+  }
+}