feat(forum): guest cash purchase for topic and plate follow

- Reuse pay_no_logged_in / pay_cookie_day; generalized guest cookie helpers
- Topic + plate cash: guest preview/purchase (no balance), order.user_id=0, cookie unlock
- View gates: can_view_topic pay + plate follow accept signed guest cookies
- Templates: guest buy/follow CTAs; poll endpoint allows plate_follow guest orders

inc/helpers/aksrt-pay.php

@@ -361,12 +361,31 @@ if (!function_exists('aksrt_content_order_cookie_token_key')) {
 }
 
 /**
- * Set guest paid cookies after content order paid (Zibll zibpay_posts_order_created_set_cookie).
+ * Whether guest cash purchase is allowed for forum topic / plate follow.
+ * Reuses global pay_no_logged_in (same switch as content).
+ *
+ * @param WP_Post|int|null $post Topic or plate post (optional filter context).
+ */
+if (!function_exists('aksrt_allow_guest_forum_pay')) {
+    function aksrt_allow_guest_forum_pay($post = null): bool {
+        $order = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_order_settings() : [];
+        $paid  = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_paid_content_settings() : [];
+        $allow = !empty($order['no_logged_in']) || !empty($paid['no_logged_in']);
+        /**
+         * @param bool             $allow
+         * @param WP_Post|int|null $post
+         */
+        return (bool) apply_filters('aksrt_allow_guest_forum_pay', $allow, $post);
+    }
+}
+
+/**
+ * Set guest paid cookies after cash order paid (content / topic / plate_follow).
  *
  * @param array<string,mixed> $order
  */
-if (!function_exists('aksrt_set_guest_content_pay_cookies')) {
-    function aksrt_set_guest_content_pay_cookies(array $order): void {
+if (!function_exists('aksrt_set_guest_pay_cookies')) {
+    function aksrt_set_guest_pay_cookies(array $order): void {
         $post_id = (int) ($order['product_id'] ?? 0);
         $order_number = (string) ($order['order_number'] ?? '');
         if ($post_id <= 0 || $order_number === '') {
@@ -390,19 +409,30 @@ if (!function_exists('aksrt_set_guest_content_pay_cookies')) {
 }
 
 /**
- * Resolve guest paid order from browser cookie for a post.
+ * Set guest paid cookies after content order paid (Zibll zibpay_posts_order_created_set_cookie).
+ *
+ * @param array<string,mixed> $order
+ */
+if (!function_exists('aksrt_set_guest_content_pay_cookies')) {
+    function aksrt_set_guest_content_pay_cookies(array $order): void {
+        aksrt_set_guest_pay_cookies($order);
+    }
+}
+
+/**
+ * Resolve guest paid order from browser cookie for a product.
  *
  * @return array<string,mixed>|null
  */
-if (!function_exists('aksrt_get_guest_content_paid_order')) {
-    function aksrt_get_guest_content_paid_order(int $post_id): ?array {
-        if ($post_id <= 0 || empty($_COOKIE['aksrt_pay_' . $post_id])) {
+if (!function_exists('aksrt_get_guest_paid_order')) {
+    function aksrt_get_guest_paid_order(int $product_id, string $product_type = ''): ?array {
+        if ($product_id <= 0 || empty($_COOKIE['aksrt_pay_' . $product_id])) {
             return null;
         }
-        if (!class_exists('AKSRT_Order_Repository')) {
+        if (!class_exists('AKSRT_Order_Repository') || !class_exists('AKSRT_Domain_Model')) {
             return null;
         }
-        $order_number = sanitize_text_field((string) $_COOKIE['aksrt_pay_' . $post_id]);
+        $order_number = sanitize_text_field((string) $_COOKIE['aksrt_pay_' . $product_id]);
         if ($order_number === '') {
             return null;
         }
@@ -410,10 +440,16 @@ if (!function_exists('aksrt_get_guest_content_paid_order')) {
         if (!$order) {
             return null;
         }
-        if ((string) ($order['product_type'] ?? '') !== AKSRT_Domain_Model::ORDER_PRODUCT_RESOURCE) {
+        $ptype = sanitize_key((string) ($order['product_type'] ?? ''));
+        $want = sanitize_key($product_type);
+        if ($want !== '' && $ptype !== $want) {
             return null;
         }
-        if ((int) ($order['product_id'] ?? 0) !== $post_id) {
+        if ((int) ($order['product_id'] ?? 0) !== $product_id) {
+            return null;
+        }
+        // Guest orders only (logged-in users use user_id access).
+        if ((int) ($order['user_id'] ?? -1) !== 0) {
             return null;
         }
         $status = (string) ($order['status'] ?? '');
@@ -421,11 +457,10 @@ if (!function_exists('aksrt_get_guest_content_paid_order')) {
             return null;
         }
 
-        // Cookie day window from paid_at.
         $paid_at = (string) ($order['paid_at'] ?? $order['created_at'] ?? '');
         if ($paid_at !== '') {
             $ts = strtotime($paid_at);
-            $days = aksrt_guest_pay_cookie_days($post_id);
+            $days = aksrt_guest_pay_cookie_days($product_id);
             if ($ts !== false && ($ts + DAY_IN_SECONDS * $days) < time()) {
                 return null;
             }
@@ -443,7 +478,21 @@ if (!function_exists('aksrt_get_guest_content_paid_order')) {
 }
 
 /**
- * Whether current request has paid access via guest cookie.
+ * Resolve guest paid order from browser cookie for a post (content/resource).
+ *
+ * @return array<string,mixed>|null
+ */
+if (!function_exists('aksrt_get_guest_content_paid_order')) {
+    function aksrt_get_guest_content_paid_order(int $post_id): ?array {
+        $type = class_exists('AKSRT_Domain_Model')
+            ? AKSRT_Domain_Model::ORDER_PRODUCT_RESOURCE
+            : 'resource';
+        return aksrt_get_guest_paid_order($post_id, $type);
+    }
+}
+
+/**
+ * Whether current request has paid access via guest cookie (content/resource product).
  */
 if (!function_exists('aksrt_guest_has_paid_access')) {
     function aksrt_guest_has_paid_access(int $post_id): bool {
@@ -451,6 +500,18 @@ if (!function_exists('aksrt_guest_has_paid_access')) {
     }
 }
 
+/**
+ * Guest paid plate follow access (cookie).
+ */
+if (!function_exists('aksrt_guest_has_plate_follow_access')) {
+    function aksrt_guest_has_plate_follow_access(int $plate_id): bool {
+        $type = class_exists('AKSRT_Domain_Model')
+            ? AKSRT_Domain_Model::ORDER_PRODUCT_PLATE_FOLLOW
+            : 'plate_follow';
+        return null !== aksrt_get_guest_paid_order($plate_id, $type);
+    }
+}
+
 /**
  * Resolve the amount a given user should pay for a post (Zibll VIP tier min).
  *