Sync acceptance criteria toggle state to children

resources/js/lib/acceptance-criteria.ts

@@ -65,6 +65,34 @@ export const buildAcceptanceCriteria = (
     return normalizeAcceptanceCriteria(parseChecklistLines(checklistInput));
 };
 
+export const syncAcceptanceCriteriaDescendantCheckedState = (
+    items: AcceptanceCriteriaModel,
+    index: number,
+    checked: boolean,
+): AcceptanceCriteriaModel => {
+    if (index < 0 || index >= items.length) {
+        return items;
+    }
+
+    const parentIndent = items[index]?.indent ?? 0;
+
+    return items.map((item, itemIndex) => {
+        if (itemIndex === index) {
+            return { ...item, checked };
+        }
+
+        if (itemIndex < index) {
+            return item;
+        }
+
+        if (item.indent <= parentIndent) {
+            return item;
+        }
+
+        return { ...item, checked };
+    });
+};
+
 export const acceptanceCriteriaToEditorState = (
     value: AcceptanceCriteriaModel | null | undefined,
 ): AcceptanceCriteriaEditorState => {