From 2d5fcfe48fc98da229be73d193a17da75a72f4c5 Mon Sep 17 00:00:00 2001
From: Anze Demsar <anze.demsar@p-m.si>
Date: Thu, 14 Mar 2024 13:00:02 +0100
Subject: [PATCH] fix: apply duplicate i18n values on entry load

---
 packages/decap-cms-core/src/lib/i18n.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/packages/decap-cms-core/src/lib/i18n.ts b/packages/decap-cms-core/src/lib/i18n.ts
index 75e5defaf729..d029211d016e 100644
--- a/packages/decap-cms-core/src/lib/i18n.ts
+++ b/packages/decap-cms-core/src/lib/i18n.ts
@@ -219,6 +219,24 @@ export function formatI18nBackup(
   return i18n;
 }
 
+function applyDefaultI18nValues(
+  collection: Collection,
+  value: EntryValue,
+  defaultLocaleValue: EntryValue,
+) {
+  if (collection.get('fields') === undefined) {
+    return;
+  }
+  collection.get('fields').forEach(field => {
+    if (field && field.get(I18N) === I18N_FIELD.DUPLICATE) {
+      const data = value.data[field.get('name')];
+      if (!data) {
+        value.data[field.get('name')] = defaultLocaleValue.data[field.get('name')];
+      }
+    }
+  });
+}
+
 function mergeValues(
   collection: Collection,
   structure: I18N_STRUCTURE,
@@ -234,6 +252,9 @@ function mergeValues(
     .filter(e => e.locale !== defaultEntry!.locale)
     .reduce((acc, { locale, value }) => {
       const dataPath = getLocaleDataPath(locale);
+      if (defaultEntry) {
+        applyDefaultI18nValues(collection, value, defaultEntry.value);
+      }
       return set(acc, dataPath, value.data);
     }, {});