Fix ROC date parsing for roster import

app/Console/Commands/ImportMembersCommand.php

@@ -348,7 +348,30 @@ class ImportMembersCommand extends Command
 
         if (is_numeric($value)) {
             $numeric = (float) $value;
-            if ($numeric > 10000) {
+            $digits = preg_replace('/\D/', '', (string) $numeric);
+
+            if (strlen($digits) === 6 || strlen($digits) === 7) {
+                $yearLength = strlen($digits) - 4;
+                $rocYear = (int) substr($digits, 0, $yearLength);
+                $month = (int) substr($digits, $yearLength, 2);
+                $day = (int) substr($digits, $yearLength + 2, 2);
+                $year = $rocYear + 1911;
+
+                if (checkdate($month, $day, $year)) {
+                    return sprintf('%04d-%02d-%02d', $year, $month, $day);
+                }
+            }
+
+            if (strlen($digits) === 8) {
+                $year = (int) substr($digits, 0, 4);
+                $month = (int) substr($digits, 4, 2);
+                $day = (int) substr($digits, 6, 2);
+                if (checkdate($month, $day, $year)) {
+                    return sprintf('%04d-%02d-%02d', $year, $month, $day);
+                }
+            }
+
+            if ($numeric > 0) {
                 return ExcelDate::excelToDateTimeObject($numeric)->format('Y-m-d');
             }
         }
@@ -477,6 +500,10 @@ class ImportMembersCommand extends Command
             $update['birth_date'] = $birthDate;
         }
 
+        if ($birthDate && $member->birth_date && $this->isInvalidDate($member->birth_date)) {
+            $update['birth_date'] = $birthDate;
+        }
+
         if ($gender && ! $member->gender) {
             $update['gender'] = $gender;
         }
@@ -512,6 +539,20 @@ class ImportMembersCommand extends Command
         return $update;
     }
 
+    protected function isInvalidDate(mixed $value): bool
+    {
+        try {
+            $date = $value instanceof \DateTimeInterface ? $value : new \DateTime($value);
+        } catch (\Exception) {
+            return true;
+        }
+
+        $year = (int) $date->format('Y');
+        $currentYear = (int) date('Y');
+
+        return $year < 1900 || $year > ($currentYear + 1);
+    }
+
     protected function toPinyin(string $name): string
     {
         // Simple romanization for email generation