消费记录，中奖记录

app/logic/Zone.php

@@ -0,0 +1,150 @@
+<?php
+
+namespace app\logic;
+use app\model\ZoneGoodsParam;
+use app\model\ZoneOrder;
+use think\facade\Db;
+
+/**
+ * 专区逻辑层
+ */
+class Zone
+{
+
+    /**
+     * 余额扣减后 生成订单
+     * @param $user_id
+     * @param $zone_goods_id
+     * @return array
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\DbException
+     * @throws \think\db\exception\ModelNotFoundException
+     */
+    public static function createOrder($user_id,$zone_goods_id)
+    {
+        # 获取奖项个参数
+        $zoneParamArr = ZoneGoodsParam::getList(['zone_goods_id' => $zone_goods_id]);
+
+        $data = self::getWinningPrize2($zoneParamArr);
+
+        # 记录订单
+        $zone_order_id = ZoneOrder::saveOrder($user_id,$zone_goods_id,$data);
+
+        return [
+            'data' => $data,
+            'zone_order_id' => $zone_order_id
+        ];
+    }
+
+    /**
+     * 权重算法
+     * @param $patterns
+     * @return array
+     */
+    protected static function getWinningPrize($patterns)
+    {
+
+        $temp = [
+            ['image' => 'test.png', 'weight' => 1],         // 奖项图案，权重为5
+            ['image' => 'prize2.png', 'weight' => 1],       // 奖项图案，权重为3
+            ['image' => 'no_prize1.png', 'weight' => 1],    // 非奖项图案，权重为10
+            ['image' => 'no_prize2.png', 'weight' => 1],    // 非奖项图案，权重为8
+            ['image' => 'no_prize6.png', 'weight' => 1],    // 非奖项图案，权重为8
+            ['image' => 'no_prize7.png', 'weight' => 1],    // 非奖项图案，权重为8
+            ['image' => 'testtest.png', 'weight' => 0.01],  // 非奖项图案，权重为8
+        ];
+        $patterns = array_merge($patterns,$temp);
+
+        // 所有图案的权重相加
+        $totalWeight = 0;
+        foreach ($patterns as $pattern) {
+            $totalWeight += $pattern['weight'];
+        }
+
+
+        $imageArr = [];
+        $numberOfGroups = 3; // 要生成的图案组数
+        $groupsNum = 4; // 要生成的图案组数
+
+        for ($i = 0; $i < $numberOfGroups; $i++) {
+
+            // 每组生成 3 个图案
+            for ($j = 0; $j < $groupsNum; $j++) {
+
+                // 输出选中图案
+                $selectedPattern = null;
+
+                // 生成随机数
+                $randomNumber = rand(1, $totalWeight);
+
+                foreach ($patterns as $pattern) {
+                    $randomNumber -= $pattern['weight'];
+                    if ($randomNumber <= 0) {
+                        $selectedPattern = $pattern;
+                        break;
+                    }
+                }
+
+                $imageArr[$i][] = $selectedPattern['image'];
+            }
+        }
+        return $imageArr;
+    }
+
+    /**
+     * 概率算法
+     * @return array
+     */
+    protected static function getWinningPrize2($patterns)
+    {
+//        $patterns = [
+//            ['image' => 'prize1.png', 'probability' => 0.3],      // 奖项图案，概率为30%
+//            ['image' => 'prize2.png', 'probability' => 0.2],      // 奖项图案，概率为20%
+//            ['image' => 'no_prize1.png', 'probability' => 0.1],   // 非奖项图案，概率为10%
+//            ['image' => 'no_prize2.png', 'probability' => 0.32],  // 非奖项图案，概率为32%
+//            ['image' => 'test1.png', 'probability' => 0.07],      // 非奖项图案，概率为7%
+//            ['image' => 'test2.png', 'probability' => 0.002],     // 非奖项图案，概率为0.2%
+//            ['image' => 'test3.png', 'probability' => 0.003],     // 非奖项图案，概率为0.3%
+//            ['image' => 'test4.png', 'probability' => 0.004],     // 非奖项图案，概率为0.4%
+//            ['image' => 'test5.png', 'probability' => 0.001],     // 非奖项图案，概率为0.1%
+//        ];
+
+        // 计算概率总和
+        $totalProbability = 0;
+        foreach ($patterns as $pattern) {
+            $totalProbability += $pattern['probability'];
+        }
+
+        // 归一化处理，并计算累积概率
+        $accumulatedProbability = 0;
+        foreach ($patterns as &$pattern) {
+            $pattern['probability'] /= $totalProbability; // 归一化处理
+            $accumulatedProbability += $pattern['probability'];
+            $pattern['accumulatedProbability'] = $accumulatedProbability; // 累积概率
+        }
+        unset($pattern);
+
+        $numberOfGroups = 3; // 要生成的图案组数
+        $groupNum = 4; // 要生成的图案组数
+
+        $data = [];
+        for ($i = 0; $i < $numberOfGroups; $i++) {
+
+            for ($j = 0; $j < $groupNum; $j++) { // 每组生成 3 个图案
+                $selectedPattern = null;
+                $randomNumber = mt_rand() / mt_getrandmax(); // 生成 0 到 1 之间的随机数
+
+                foreach ($patterns as $pattern) {
+                    if ($randomNumber <= $pattern['accumulatedProbability']) {
+                        $selectedPattern = $pattern;
+                        break;
+                    }
+                }
+
+                $data[$i][] = $selectedPattern['image'];
+            }
+
+        }
+        return $data;
+    }
+}