From 9ff29c794e906202550dbce0e4621c02810bfa2c Mon Sep 17 00:00:00 2001
From: Adria Navarro <adria@budibase.com>
Date: Wed, 29 Jan 2025 21:01:19 +0100
Subject: [PATCH] Add TextDecoder polyfill

---
 .prettierignore                               |  3 ++-
 .../bundles/bson-polyfills.ivm.bundle.js      | 23 +++++++++++++++----
 .../server/src/jsRunner/vm/isolated-vm.ts     |  5 ++--
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/.prettierignore b/.prettierignore
index b1ee287391..b0f9f8cdbf 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -9,4 +9,5 @@ packages/backend-core/coverage
 packages/builder/.routify
 packages/sdk/sdk
 packages/pro/coverage
-**/*.ivm.bundle.js
\ No newline at end of file
+**/*.ivm.bundle.js
+!**/bson-polyfills.ivm.bundle.js
\ No newline at end of file
diff --git a/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js b/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
index e8147c63da..33a3e9deaa 100644
--- a/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
+++ b/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
@@ -1,6 +1,21 @@
-function atob(...args){
-    return atobCB(...args)
+function atob(...args) {
+  return atobCB(...args)
 }
-function btoa(...args){
-    return btoaCB(...args)
+function btoa(...args) {
+  return btoaCB(...args)
+}
+
+class TextDecoder {
+  constructorArgs
+
+  constructor(...constructorArgs) {
+    this.constructorArgs = constructorArgs
+  }
+
+  decode(...input) {
+    return textDecoderCb({
+      constructorArgs: this.constructorArgs,
+      functionArgs: input,
+    })
+  }
 }
diff --git a/packages/server/src/jsRunner/vm/isolated-vm.ts b/packages/server/src/jsRunner/vm/isolated-vm.ts
index 65a2615ed7..4b17d52dba 100644
--- a/packages/server/src/jsRunner/vm/isolated-vm.ts
+++ b/packages/server/src/jsRunner/vm/isolated-vm.ts
@@ -161,6 +161,8 @@ export class IsolatedVM implements VM {
 
     const bsonSource = loadBundle(BundleType.BSON)
 
+    // "Polyfilling" text decoder and other utils. `bson.deserialize` requires decoding. We are creating a bridge function so we don't need to inject the full library
+    const bsonPolyfills = loadBundle(BundleType.BSON_POLYFILLS)
     this.addToContext({
       textDecoderCb: new ivm.Callback(
         (args: {
@@ -183,9 +185,6 @@ export class IsolatedVM implements VM {
       }),
     })
 
-    // "Polyfilling" text decoder and other utils. `bson.deserialize` requires decoding. We are creating a bridge function so we don't need to inject the full library
-    const bsonPolyfills = loadBundle(BundleType.BSON_POLYFILLS)
-
     const script = this.isolate.compileScriptSync(
       `${bsonPolyfills};${bsonSource}`
     )