From 090537879203be058cb3742d5abc3ceecae9ea40 Mon Sep 17 00:00:00 2001
From: Sean Fong <sean.fong@csiro.au>
Date: Tue, 27 Aug 2024 11:12:10 +0930
Subject: [PATCH] Fix - add removeDuplicateCodings implementation

---
 packages/smart-forms-renderer/src/utils/choice.ts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/packages/smart-forms-renderer/src/utils/choice.ts b/packages/smart-forms-renderer/src/utils/choice.ts
index 520cf040..0eb454f9 100644
--- a/packages/smart-forms-renderer/src/utils/choice.ts
+++ b/packages/smart-forms-renderer/src/utils/choice.ts
@@ -97,6 +97,21 @@ export function findInAnswerOptions(
   return;
 }
 
+/**
+ * Remove duplicate codings based on coding.code
+ */
+export function removeDuplicateCodings(codings: Coding[]): Coding[] {
+  const seenCodes = new Set();
+  return codings.filter((coding) => {
+    if (seenCodes.has(coding.code)) {
+      return false;
+    } else {
+      seenCodes.add(coding.code);
+      return true;
+    }
+  });
+}
+
 /**
  * Compare answer option value with selected value via valueString, valueInteger, or valueCoding.code
  *