[接口]新增获取彩金池，购买游戏次数（购买抽奖券）接口

server/app/api/controller/GameController.php

@@ -0,0 +1,67 @@
+<?php
+declare(strict_types=1);
+
+namespace app\api\controller;
+
+use support\Request;
+use support\Response;
+use app\api\logic\UserLogic;
+use app\api\logic\GameLogic;
+use app\dice\model\reward_config\DiceRewardConfig;
+use plugin\saiadmin\basic\OpenController;
+
+/**
+ * 游戏相关接口（购买抽奖券等）
+ */
+class GameController extends OpenController
+{
+    /**
+     * 购买抽奖券
+     * POST /api/game/buyLotteryTickets
+     * header: auth-token, user-token
+     * body: count = 1 | 5 | 10（1次/100coin, 5次/500coin, 10次/1000coin）
+     * 记录钱包流水，并更新缓存中玩家的 total_draw_count、paid_draw_count、free_draw_count、coin
+     */
+    public function buyLotteryTickets(Request $request): Response
+    {
+        $token = $request->header('user-token');
+        if (empty($token)) {
+            $auth = $request->header('authorization');
+            if ($auth && stripos($auth, 'Bearer ') === 0) {
+                $token = trim(substr($auth, 7));
+            }
+        }
+        if (empty($token)) {
+            return $this->fail('请携带 user-token');
+        }
+        $userId = UserLogic::getUserIdFromToken($token);
+        if ($userId === null) {
+            return $this->fail('user-token 无效或已过期');
+        }
+
+        $count = (int) $request->post('count', 0);
+        if (!in_array($count, [1, 5, 10], true)) {
+            return $this->fail('购买抽奖券错误');
+        }
+
+        try {
+            $logic = new GameLogic();
+            $data = $logic->buyLotteryTickets($userId, $count);
+            return $this->success($data);
+        } catch (\plugin\saiadmin\exception\ApiException $e) {
+            return $this->fail($e->getMessage());
+        }
+    }
+
+    /**
+     * 获取彩金池（中奖配置表）
+     * GET /api/game/lotteryPool
+     * header: auth-token
+     * 返回 DiceRewardConfig 列表（彩金池/中奖配置）
+     */
+    public function lotteryPool(Request $request): Response
+    {
+        $list = DiceRewardConfig::order('id', 'asc')->select()->toArray();
+        return $this->success($list);
+    }
+}