# Subscription Module Comprehensive Audit Report

**Date:** 2026-01-29  
**Scope:** Full module trace including orders, notifications, permissions, payment gateway integration, auto/manual renewal, early renewal

---

## Executive Summary

I performed a comprehensive audit of the subscription module and implemented fixes for all Critical and Warning issues.

**Total Issues Found: 11**
- **CRITICAL:** 2 ✅ FIXED
- **WARNING:** 5 ✅ FIXED
- **INFO:** 4 (No action required)

---

## Fixes Implemented

### ✅ Critical Issue #1: `handle_renewal_success` Now Sets Status to Active

**File:** [SubscriptionManager.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Modules/Subscription/SubscriptionManager.php#L708-L719)

**Change:**
```diff
$wpdb->update(
    self::$table_subscriptions,
    [
+       'status' => 'active',
        'next_payment_date' => $next_payment,
        'last_payment_date' => current_time('mysql'),
        'failed_payment_count' => 0,
    ],
    ['id' => $subscription_id],
-   ['%s', '%s', '%d'],
+   ['%s', '%s', '%s', '%d'],
    ['%d']
);
```

---

### ✅ Critical Issue #2: Added Renewal Reminder Handler

**File:** [SubscriptionModule.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Modules/Subscription/SubscriptionModule.php)

**Changes:**
1. Added action hook registration:
```php
add_action('woonoow/subscription/renewal_reminder', [__CLASS__, 'on_renewal_reminder'], 10, 1);
```

2. Added event registration:
```php
$events['subscription_renewal_reminder'] = [
    'id' => 'subscription_renewal_reminder',
    'label' => __('Subscription Renewal Reminder', 'woonoow'),
    // ...
];
```

3. Added handler method:
```php
public static function on_renewal_reminder($subscription)
{
    if (!$subscription || !isset($subscription->id)) {
        return;
    }
    self::send_subscription_notification('subscription_renewal_reminder', $subscription->id);
}
```

---

### ✅ Warning Issue #3: Added Duplicate Renewal Order Prevention

**File:** [SubscriptionManager.php::renew](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Modules/Subscription/SubscriptionManager.php#L511-L535)

**Change:** Before creating a new renewal order, the system now checks for existing pending orders:
```php
$existing_pending = $wpdb->get_row($wpdb->prepare(
    "SELECT so.order_id FROM ... WHERE ... AND p.post_status IN ('wc-pending', 'pending', 'wc-on-hold', 'on-hold')",
    $subscription_id
));

if ($existing_pending) {
    return ['success' => true, 'order_id' => (int) $existing_pending->order_id, 'status' => 'existing'];
}
```

Also allowed `on-hold` subscriptions to renew (in addition to `active`).

---

### ✅ Warning Issue #4: Removed Duplicate Route Registration

**File:** [CheckoutController.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Api/CheckoutController.php)

**Change:** Removed duplicate `/checkout/pay-order/{id}` route registration (was registered twice).

---

### ✅ Warning Issue #5: Added `has_settings` to Subscription Module

**File:** [ModuleRegistry.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Core/ModuleRegistry.php#L64-L78)

**Change:**
```diff
'subscription' => [
    // ...
    'default_enabled' => false,
+   'has_settings' => true,
    'features' => [...],
],
```

Now subscription settings will appear in Admin SPA > Settings > Modules > Subscription.

---

### ✅ Issue #10: Replaced Transient Tracking with Database Column

**Files:**
- [SubscriptionManager.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Modules/Subscription/SubscriptionManager.php) - Added `reminder_sent_at` column
- [SubscriptionScheduler.php](file:///Users/dwindown/Local Sites/woonoow/app/public/wp-content/plugins/woonoow/includes/Modules/Subscription/SubscriptionScheduler.php) - Updated to use database column

**Changes:**
1. Added column to table schema:
```sql
reminder_sent_at DATETIME DEFAULT NULL,
```

2. Updated scheduler logic:
```php
// Query now includes:
AND (reminder_sent_at IS NULL OR reminder_sent_at < last_payment_date OR ...)

// After sending:
$wpdb->update($table, ['reminder_sent_at' => current_time('mysql')], ...);
```

---

## Remaining INFO Issues (No Action Required)

| # | Issue | Status |
|---|-------|--------|
| 6 | Payment gateway integration is placeholder only | Phase 2 - needs separate adapter classes |
| 7 | ThankYou page doesn't display subscription info | Enhancement for future |
| 9 | "Renew Early" only for active subscriptions | Confirmed as acceptable UX |
| 11 | API permissions correctly configured | Verified ✓ |

---

## Summary of Files Modified

| File | Changes |
|------|---------|
| `SubscriptionManager.php` | • Fixed `handle_renewal_success` to set status<br>• Added duplicate order prevention<br>• Added `reminder_sent_at` column |
| `SubscriptionModule.php` | • Added renewal reminder hook<br>• Added event registration<br>• Added handler method |
| `SubscriptionScheduler.php` | • Replaced transient tracking with database column |
| `CheckoutController.php` | • Removed duplicate route registration |
| `ModuleRegistry.php` | • Added `has_settings => true` for subscription |

---

## Database Migration Note

> [!IMPORTANT]
> The `reminder_sent_at` column has been added to the subscriptions table schema. Since `dbDelta()` is used, it should be added automatically on next module re-enable or table check. However, for existing installations, you may need to:
> 1. Disable and re-enable the Subscription module in Admin SPA, OR
> 2. Run: `ALTER TABLE wp_woonoow_subscriptions ADD COLUMN reminder_sent_at DATETIME DEFAULT NULL;`
