1 files changed, 32 insertions, 0 deletions
diff --git a/ReferenceClientProxyImplementation/Patches/Implementations/JSPatches/NullCoalescingPatch.cs b/ReferenceClientProxyImplementation/Patches/Implementations/JSPatches/NullCoalescingPatch.cs
new file mode 100644
index 0000000..98156c8
--- /dev/null
+++ b/ReferenceClientProxyImplementation/Patches/Implementations/JSPatches/NullCoalescingPatch.cs
@@ -0,0 +1,32 @@
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace ReferenceClientProxyImplementation.Patches.Implementations.JSPatches;
+
+public partial class NullCoalescingPatch : IPatch {
+ public int GetOrder() => 1;
+
+ public string GetName() => "Patch null-coalescing expressions in JS";
+ public bool Applies(string relativeName, byte[] content) => relativeName.EndsWith(".js");
+
+ public async Task<byte[]> Execute(string relativePath, byte[] content) {
+ var stringContent = Encoding.UTF8.GetString(content);
+
+ stringContent = NullCoalescingRegex().Replace(
+ stringContent,
+ m => $"{m.Groups[1].Value}?.{m.Groups[2].Value}"
+ );
+ // stringContent = ParenNullCheckRegex().Replace(
+ // stringContent,
+ // m => $"{m.Groups[1].Value} == null"
+ // );
+
+ return Encoding.UTF8.GetBytes(stringContent);
+ }
+
+ [GeneratedRegex(@"null == ([a-zA-Z0-9_]+?) \? undefined : \1\.([a-zA-Z0-9_]+?)", RegexOptions.Compiled)]
+ private static partial Regex NullCoalescingRegex();
+
+ [GeneratedRegex(@"\(([^()]+?)\) == null", RegexOptions.Compiled)]
+ private static partial Regex ParenNullCheckRegex();
+}
\ No newline at end of file
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