implement static useful functions for Feature

src/pay_center/Feature.php

@@ -10,6 +10,7 @@ namespace neoteched\rpc\pay_center;
 
 
 use x2ts\IAssignable;
+use x2ts\rpc\RPCWrapper;
 
 class Feature implements IAssignable {
     use AssignTrait;
@@ -20,6 +21,8 @@ class Feature implements IAssignable {
         self::TYPE_CARD,
     ];
 
+    private static $userBought = [];
+
     public $name = '';
 
     public $description = '';
@@ -29,4 +32,28 @@ class Feature implements IAssignable {
     public $ctime = 0;
 
     public $mtime = 0;
+
+    public static function boughtFeatureNames(int $userId): array {
+        return array_keys(self::userBought($userId));
+    }
+
+    public static function userBought(int $userId) {
+        if (!array_key_exists($userId, self::$userBought)) {
+            self::$userBought[$userId] = RPCWrapper::rpc('pay_center')
+                ->call('boughtFeatureHash', $userId);
+        }
+        return self::$userBought[$userId];
+    }
+
+    public static function boughtFeatures(int $userId): array {
+        return RPCWrapper::rpc('pay_center')->call('boughtFeatures', $userId);
+    }
+
+    public static function boughtFeatureCount(int $userId): int {
+        return count(self::userBought($userId));
+    }
+
+    public static function hasBought(string $name, int $userId): bool {
+        return array_key_exists($name, self::userBought($userId));
+    }
 }
\ No newline at end of file

src/pay_center/Product.php

@@ -14,6 +14,8 @@ use x2ts\rpc\RPCWrapper;
 class Product implements IAssignable {
     use AssignTrait;
 
+    private static $userBought = [];
+
     public $name = '';
 
     public $price = 0;
@@ -28,7 +30,9 @@ class Product implements IAssignable {
 
     public $mtime = 0;
 
-    private static $userBought = [];
+    public static function boughtProductNames(int $userId): array {
+        return array_keys(self::userBought($userId));
+    }
 
     public static function userBought(int $userId) {
         if (!array_key_exists($userId, self::$userBought)) {
@@ -38,11 +42,7 @@ class Product implements IAssignable {
         return self::$userBought[$userId];
     }
 
-    public static function boughtProductNames(int $userId): array {
-        return array_keys(self::userBought($userId));
-    }
-
-    public static function boughtProducts(int $userId) {
+    public static function boughtProducts(int $userId): array {
         return RPCWrapper::rpc('pay_center')->call('boughtProducts', $userId);
     }