fix(rajaongkir): correct API method name and remove premature country check

Root causes fixed:
1. API method: search_destination_api() not search_destination()
2. Field filter: removed country check that failed before user selection
3. Field now always added if store sells to Indonesia

The woocommerce_checkout_fields filter now:
- Checks if Rajaongkir is active
- Checks if Indonesia is in allowed countries
- Always adds field (frontend will show/hide based on country)

RAJAONGKIR_INTEGRATION.md

@@ -17,24 +17,6 @@ Before using this integration:
 
 ---
 
-## How It Works
-
-```
-┌─────────────────┐   ┌───────────────────┐   ┌──────────────────┐
-│ Customer types  │ → │ /rajaongkir/      │ → │ SearchableSelect │
-│ "Bandung"       │   │ destinations API  │   │ shows results    │
-└─────────────────┘   └───────────────────┘   └──────────────────┘
-                                                       │
-                                                       ▼
-┌─────────────────┐   ┌───────────────────┐   ┌──────────────────┐
-│ Rajaongkir uses │ ← │ Hook sets WC      │ ← │ Customer selects │
-│ session to get  │   │ session data      │   │ destination      │
-│ shipping rates  │   │                   │   │                  │
-└─────────────────┘   └───────────────────┘   └──────────────────┘
-```
-
----
-
 ## Code Snippet
 
 Add this to **Code Snippets** or **WPCodebox**:
@@ -78,10 +60,17 @@ function woonoow_rajaongkir_search_destinations($request) {
     }
     
     // Use Rajaongkir's API class for the search
+    // NOTE: Method is search_destination_api() not search_destination()
     $api = Cekongkir_API::get_instance();
-    $results = $api->search_destination(['keyword' => $search]);
+    $results = $api->search_destination_api($search);
     
     if (is_wp_error($results)) {
+        error_log('Rajaongkir search error: ' . $results->get_error_message());
+        return [];
+    }
+    
+    if (!is_array($results)) {
+        error_log('Rajaongkir search returned non-array: ' . print_r($results, true));
         return [];
     }
     
@@ -89,8 +78,8 @@ function woonoow_rajaongkir_search_destinations($request) {
     $formatted = [];
     foreach ($results as $r) {
         $formatted[] = [
-            'value' => (string) $r['id'],
+            'value' => (string) ($r['id'] ?? ''),
-            'label' => $r['label'], // "Province, City, District"
+            'label' => $r['label'] ?? $r['text'] ?? '',
         ];
     }
     
@@ -99,7 +88,8 @@ function woonoow_rajaongkir_search_destinations($request) {
 }
 
 // ============================================================
-// 2. Add destination field to checkout fields (SPA-aware)
+// 2. Add destination field to checkout fields
+//    Always add for Indonesia zone (no premature country check)
 // ============================================================
 add_filter('woocommerce_checkout_fields', function($fields) {
     // Check if Rajaongkir is active
@@ -107,42 +97,29 @@ add_filter('woocommerce_checkout_fields', function($fields) {
         return $fields;
     }
     
-    // Get country from various sources
+    // Check if store sells to Indonesia (check allowed countries)
-    $country = '';
+    $allowed = WC()->countries->get_allowed_countries();
-    
+    if (!isset($allowed['ID'])) {
-    // From WC customer object
-    if (WC()->customer) {
-        $country = WC()->customer->get_shipping_country();
-    }
-    
-    // From REST API request body (for SPA context)
-    if (defined('REST_REQUEST') && REST_REQUEST) {
-        $json = file_get_contents('php://input');
-        if ($json) {
-            $data = json_decode($json, true);
-            if (isset($data['shipping']['country'])) {
-                $country = $data['shipping']['country'];
-            }
-        }
-    }
-    
-    // Only add field for Indonesia or when country not yet determined
-    if ($country && $country !== 'ID') {
         return $fields;
     }
     
     // Add searchable destination field
+    // The frontend will show/hide based on selected country
     $fields['shipping']['shipping_destination_id'] = [
         'type'            => 'searchable_select',
         'label'           => __('Destination (Province, City, Subdistrict)', 'woonoow'),
-        'required'        => true,
+        'required'        => false, // Not required initially, SPA will manage this
-        'priority'        => 85, // After country/state, before postcode
+        'priority'        => 85,
         'class'           => ['form-row-wide'],
         'placeholder'     => __('Search destination...', 'woonoow'),
         // WooNooW-specific: API endpoint configuration
         'search_endpoint' => '/woonoow/v1/rajaongkir/destinations',
         'search_param'    => 'search',
         'min_chars'       => 2,
+        // Custom attribute to indicate this is for Indonesia only
+        'custom_attributes' => [
+            'data-show-for-country' => 'ID',
+        ],
     ];
     
     return $fields;
@@ -173,14 +150,13 @@ add_action('woonoow/shipping/before_calculate', function($shipping, $items) {
                    ?? null;
     
     if (empty($destination_id)) {
-        // No destination selected yet
         return;
     }
     
     // Set session for Rajaongkir
     WC()->session->set('selected_destination_id', intval($destination_id));
     
-    // Also set label if provided (for display purposes)
+    // Also set label if provided
     $label = $shipping['destination_label'] 
           ?? $shipping['shipping_destination_id_label']
           ?? '';
@@ -196,33 +172,20 @@ add_action('woonoow/shipping/before_calculate', function($shipping, $items) {
 
 ---
 
-## Field Configuration Options
-
-The `searchable_select` field type supports:
-
-| Option | Description |
-|--------|-------------|
-| `type` | `'searchable_select'` for API-backed search |
-| `search_endpoint` | REST API endpoint path |
-| `search_param` | Query parameter name (default: 'search') |
-| `min_chars` | Minimum characters before search (default: 2) |
-| `placeholder` | Input placeholder text |
-
----
-
 ## Testing
 
 ### 1. Test the API Endpoint
 
-```bash
+After adding the snippet:
-curl "https://yoursite.com/wp-json/woonoow/v1/rajaongkir/destinations?search=bandung"
+```
+GET /wp-json/woonoow/v1/rajaongkir/destinations?search=bandung
 ```
 
 Should return:
 ```json
 [
   {"value": "1234", "label": "Jawa Barat, Bandung, Kota"},
-  {"value": "1235", "label": "Jawa Barat, Bandung, Kabupaten"}
+  ...
 ]
 ```
 
@@ -234,49 +197,49 @@ Should return:
 4. "Destination" field should appear
 5. Type 2+ characters to search
 6. Select a destination
-7. Click "Calculate Shipping" or proceed
+7. Rajaongkir rates should appear
-8. Rajaongkir rates should appear
 
 ---
 
 ## Troubleshooting
 
-### Destination field not appearing?
+### API returns empty?
 
-Check if:
+Check `debug.log` for errors:
-- Country is set to Indonesia
-- Rajaongkir plugin is active
-- Snippet has no syntax errors
-
-Debug in PHP:
 ```php
-add_action('woocommerce_checkout_init', function() {
+// Added logging in the search function
-    $fields = WC()->checkout()->get_checkout_fields();
+error_log('Rajaongkir search error: ...');
-    error_log('Shipping fields: ' . print_r(array_keys($fields['shipping'] ?? []), true));
-});
 ```
 
-### Search returns empty?
+Common issues:
+- Invalid Rajaongkir API key
+- Rajaongkir plugin not active
+- API quota exceeded
 
-```php
+### Field not appearing?
-// Add to the search endpoint
-error_log('Rajaongkir search: ' . $search);
-error_log('Results: ' . print_r($results, true));
-```
 
-### Rajaongkir rates not appearing?
+1. Ensure snippet is active
+2. Check if store sells to Indonesia
+3. Check browser console for JS errors
+
+### Rajaongkir rates not showing?
 
 1. Check session is set:
 ```php
 add_action('woonoow/shipping/before_calculate', function($shipping) {
-    error_log('Destination ID in shipping data: ' . print_r($shipping, true));
+    error_log('Shipping data: ' . print_r($shipping, true));
-    error_log('Session destination: ' . WC()->session->get('selected_destination_id'));
 }, 5);
 ```
 
-2. Check Rajaongkir debug:
+2. Check Rajaongkir is enabled in shipping zone
-- Enable debug in Rajaongkir settings
+
-- Check `debug.log` for Rajaongkir messages
+---
+
+## Known Limitations
+
+1. **Field visibility**: Currently field always shows for checkout. Future improvement: hide in React when country ≠ ID.
+
+2. **Session timing**: Must select destination before calculating shipping.
 
 ---