From d452f95871e847b656b48b654c6d3e499f8452b3 Mon Sep 17 00:00:00 2001
From: Louis Pilfold <louis@lpil.uk>
Date: Tue, 10 Dec 2024 13:45:08 +0000
Subject: Decode JS objects, maps, weakmaps

---
 src/gleam_stdlib_decode_ffi.mjs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/gleam_stdlib_decode_ffi.mjs b/src/gleam_stdlib_decode_ffi.mjs
index 86c9c60..58291b5 100644
--- a/src/gleam_stdlib_decode_ffi.mjs
+++ b/src/gleam_stdlib_decode_ffi.mjs
@@ -64,5 +64,18 @@ export function dict(data) {
   if (data instanceof Dict) {
     return new Ok(data);
   }
-  return new Error();
+  if (data instanceof Map || data instanceof WeakMap) {
+    return new Ok(Dict.fromMap(data));
+  }
+  if (data == null) {
+    return new Error("Dict");
+  }
+  if (typeof data !== "object") {
+    return new Error("Dict");
+  }
+  const proto = Object.getPrototypeOf(data);
+  if (proto === Object.prototype || proto === null) {
+    return new Ok(Dict.fromObject(data));
+  }
+  return new Error("Dict");
 }
-- 
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