[接口]新增抽奖接口/api/game/playStart

2026-03-04 17:06:30 +08:00
parent 21c638a231
commit 0a3af2d422
6 changed files with 428 additions and 4 deletions
--- a/server/app/api/service/LotteryService.php
+++ b/server/app/api/service/LotteryService.php
@@ -0,0 +1,138 @@
+<?php
+declare(strict_types=1);
+
+namespace app\api\service;
+
+use app\dice\model\lottery_config\DiceLotteryConfig;
+use app\dice\model\player\DicePlayer;
+use support\think\Cache;
+
+/**
+ * 彩金池实例，按玩家权重与奖池配置创建，存 Redis 便于增删改查
+ */
+class LotteryService
+{
+    private const REDIS_KEY_PREFIX = 'api:game:lottery_pool:';
+    private const REDIS_KEY_START_INDEX = 'api:game:start_index:';
+    private const EXPIRE = 86400 * 7; // 7天
+
+    private int $playerId;
+    private ?int $configType0Id = null;
+    private ?int $configType1Id = null;
+    /** @var array{t1_wight?:int,t2_wight?:int,t3_wight?:int,t4_wight?:int,t5_wight?:int} */
+    private array $playerWeights = [];
+
+    public function __construct(int $playerId)
+    {
+        $this->playerId = $playerId;
+    }
+
+    public static function getRedisKey(int $playerId): string
+    {
+        return self::REDIS_KEY_PREFIX . $playerId;
+    }
+
+    public static function getStartIndexKey(int $playerId): string
+    {
+        return self::REDIS_KEY_START_INDEX . $playerId;
+    }
+
+    /** 从 Redis 加载或根据玩家与 DiceLotteryConfig 创建并保存 */
+    public static function getOrCreate(int $playerId): self
+    {
+        $key = self::getRedisKey($playerId);
+        $cached = Cache::get($key);
+        if ($cached && is_string($cached)) {
+            $data = json_decode($cached, true);
+            if (is_array($data)) {
+                $s = new self($playerId);
+                $s->configType0Id = (int) ($data['config_type_0_id'] ?? 0);
+                $s->configType1Id = (int) ($data['config_type_1_id'] ?? 0);
+                $s->playerWeights = $data['player_weights'] ?? [];
+                return $s;
+            }
+        }
+        $player = DicePlayer::find($playerId);
+        if (!$player) {
+            throw new \RuntimeException('玩家不存在');
+        }
+        $config0 = DiceLotteryConfig::where('type', 0)->find();
+        $config1 = DiceLotteryConfig::where('type', 1)->find();
+        $s = new self($playerId);
+        $s->configType0Id = $config0 ? (int) $config0->id : null;
+        $s->configType1Id = $config1 ? (int) $config1->id : null;
+        $s->playerWeights = [
+            't1_wight' => (int) ($player->t1_wight ?? 0),
+            't2_wight' => (int) ($player->t2_wight ?? 0),
+            't3_wight' => (int) ($player->t3_wight ?? 0),
+            't4_wight' => (int) ($player->t4_wight ?? 0),
+            't5_wight' => (int) ($player->t5_wight ?? 0),
+        ];
+        $s->save();
+        return $s;
+    }
+
+    public function save(): void
+    {
+        $key = self::getRedisKey($this->playerId);
+        $data = [
+            'config_type_0_id' => $this->configType0Id,
+            'config_type_1_id' => $this->configType1Id,
+            'player_weights'   => $this->playerWeights,
+        ];
+        Cache::set($key, json_encode($data), self::EXPIRE);
+    }
+
+    /** 根据奖池配置的 t1_wight..t5_wight 权重随机抽取档位 T1-T5 */
+    public static function drawTierByWeights(DiceLotteryConfig $config): string
+    {
+        $tiers = ['T1', 'T2', 'T3', 'T4', 'T5'];
+        $weights = [
+            (int) ($config->t1_wight ?? 0),
+            (int) ($config->t2_wight ?? 0),
+            (int) ($config->t3_wight ?? 0),
+            (int) ($config->t4_wight ?? 0),
+            (int) ($config->t5_wight ?? 0),
+        ];
+        $total = array_sum($weights);
+        if ($total <= 0) {
+            return $tiers[array_rand($tiers)];
+        }
+        $r = mt_rand(1, $total);
+        $acc = 0;
+        foreach ($weights as $i => $w) {
+            $acc += $w;
+            if ($r <= $acc) {
+                return $tiers[$i];
+            }
+        }
+        return $tiers[4];
+    }
+
+    /** 按 paid_draw_count 与 free_draw_count 权重随机抽取 0=付费 1=免费 */
+    public static function drawTicketType(int $paid, int $free): int
+    {
+        if ($paid <= 0 && $free <= 0) {
+            throw new \RuntimeException('抽奖券不足');
+        }
+        if ($paid <= 0) {
+            return 1;
+        }
+        if ($free <= 0) {
+            return 0;
+        }
+        $total = $paid + $free;
+        $r = mt_rand(1, $total);
+        return $r <= $paid ? 0 : 1;
+    }
+
+    public function getConfigType0Id(): ?int
+    {
+        return $this->configType0Id;
+    }
+
+    public function getConfigType1Id(): ?int
+    {
+        return $this->configType1Id;
+    }
+}