Sync acceptance criteria toggle state to children

app/Actions/Tickets/Support/AcceptanceCriteriaChecklistMapper.php

@@ -35,14 +35,15 @@ class AcceptanceCriteriaChecklistMapper
     public static function normalize(mixed $value): array
     {
         if (is_array($value)) {
-            return self::normalizeFromArray($value);
+            return self::syncDescendantCheckedState(
+                self::normalizeFromArray($value),
+            );
         }
 
         return [];
     }
 
     /**
-     * @param  Ticket  $ticket
      * @param  array<int, array{id?: int, checked: bool, indent: int, text: string}>  $items
      */
     public static function syncTicket(Ticket $ticket, array $items): void
@@ -167,6 +168,28 @@ class AcceptanceCriteriaChecklistMapper
         return max(0, min(self::MAX_INDENT_LEVEL, $indent));
     }
 
+    /**
+     * @param  array<int, array{id?: int, checked: bool, indent: int, text: string}>  $items
+     * @return array<int, array{id?: int, checked: bool, indent: int, text: string}>
+     */
+    private static function syncDescendantCheckedState(array $items): array
+    {
+        $checkedStateByIndent = [];
+
+        foreach ($items as $index => $item) {
+            $indent = $item['indent'];
+
+            if ($indent > 0 && array_key_exists($indent - 1, $checkedStateByIndent)) {
+                $items[$index]['checked'] = $checkedStateByIndent[$indent - 1];
+            }
+
+            $checkedStateByIndent[$indent] = $items[$index]['checked'];
+            $checkedStateByIndent = array_slice($checkedStateByIndent, 0, $indent + 1, true);
+        }
+
+        return $items;
+    }
+
     /**
      * @param  iterable<AcceptanceCriterion>  $criteria
      * @return array<int, array{id?: int, checked: bool, indent: int, text: string}>