Fix CreateSignedUrl with TransformOptions

Author: alustrement-bob

Storage/StorageFileApi.cs

@@ -6,6 +6,7 @@
 using System.Threading.Tasks;
 using System.Web;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using Supabase.Storage.Exceptions;
 using Supabase.Storage.Extensions;
 using Supabase.Storage.Interfaces;
@@ -67,7 +68,11 @@ public async Task<string> CreateSignedUrl(string path, int expiresIn, TransformO
             var url = $"{Url}/object/sign/{GetFinalPath(path)}";
 
             if (transformOptions != null)
-                body.Add("transform", transformOptions);
+            {
+                var transformOptionsJson = JsonConvert.SerializeObject(transformOptions, new StringEnumConverter());
+                var transformOptionsObj = JsonConvert.DeserializeObject<Dictionary<string, object>>(transformOptionsJson);
+                body.Add("transform", transformOptionsObj);
+            }
 
             var response = await Helpers.MakeRequest<CreateSignedUrlResponse>(HttpMethod.Post, url, body, Headers);
 

Storage/TransformOptions.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
 using Supabase.Core.Attributes;
 
 namespace Supabase.Storage
@@ -13,11 +14,11 @@ public class TransformOptions
         /// </summary>
         public enum ResizeType
         {
-            [MapTo("cover")]
+            [MapTo("cover"), EnumMember(Value = "cover")]
             Cover,
-            [MapTo("contain")]
+            [MapTo("contain"), EnumMember(Value = "contain")]
             Contain,
-            [MapTo("fill")]
+            [MapTo("fill"), EnumMember(Value = "fill")]
             Fill
         }
 

StorageTests/StorageFileTests.cs

@@ -179,6 +179,18 @@ public async Task GetSignedLink()
         await _bucket.Remove(new List<string> { name });
     }
 
+    [TestMethod("File: Get Signed Link with transform options")]
+    public async Task GetSignedLinkWithTransformOptions()
+    {
+        var name = $"{Guid.NewGuid()}.bin";
+        await _bucket.Upload(new Byte[] { 0x0, 0x1 }, name);
+
+        var url = await _bucket.CreateSignedUrl(name, 3600, new TransformOptions { Width = 100, Height = 100 });
+        Assert.IsTrue(Uri.IsWellFormedUriString(url, UriKind.Absolute));
+
+        await _bucket.Remove(new List<string> { name });
+    }
+
     [TestMethod("File: Get Multiple Signed Links")]
     public async Task GetMultipleSignedLinks()
     {