完成套餐推荐接口

Laravel/app/Http/Controllers/API/H5/ComboController.php

@@ -386,10 +386,41 @@ select combo_id as c_id,count(*) as sale_count from orders where status in(2,4)
   {
     $item_ids = request('item_ids'); //购买的套餐id
     $person_id = request('person_id'); //就诊人id
+    $person=DB::table('web_user_person')->where(['id' => $person_id,'is_del'=>0])->first();
+    if(!$person) return \Yz::echoError1("用户不存在");
+    //统计勾选的项目总额
+    $item_all_price=DB::table('items')->whereIn('item_id',$item_ids)->where(['status' => 1])->sum('price');
+
+    $allCombos = DB::table('combos as a')->leftJoin('combo_items as b','a.combo_id','=','b.combo_id')->whereIn('a.sex',[$person->sex,0])->where(['a.status'=>1])->get();
+    $combo_temp=[];
+    foreach ($allCombos as $key => $combo) {
+      $c_id=$combo->combo_id;
+      if (!isset($combo_temp[$c_id])) {
+        $groupedData[$c_id] = [];
+      }
+      $combo_temp[$c_id][] = $combo->item_id;
+    }
+
+    // 用于存储每个数组及其与目标数组的相似度
+    $similarities = [];
+    foreach ($combo_temp as $index => $array) {
+
+      $similarity = $this->jaccard_similarity($item_ids, $array);
+      $similarities[$index] = $similarity;
+    }
+    // 对相似度进行排序，保持索引关联
+    arsort($similarities);
+    // 获取最相似的前两个数组
+    $topTwoIndexes = array_keys($similarities, current($similarities), true); // 第一个最大值
+    next($similarities);
+    $topTwoIndexes[] = key($similarities); // 第二个最大值
+
+
+    $ids= "'" . implode("','", $topTwoIndexes) . "'";
 
     $combos = DB::select("select * from combos as a LEFT JOIN (
 select combo_id as c_id,count(*) as count from orders where status in(2,4) group by combo_id
-) as b on a.combo_id=b.c_id  where a.status=1 and a.combo_id in ('2053','1135')");
+) as b on a.combo_id=b.c_id  where a.status=1 and a.combo_id in (".$ids.")");
 
     foreach ($combos as $key => $combo) {
       $tags = json_decode($combo->tags, true);
@@ -407,12 +438,24 @@ select combo_id as c_id,count(*) as count from orders where status in(2,4) group
         'color' => '#E9F8F3',
       ];
       $combo->recommend = [
-        'xiangsidu' => '80%',
-        'count' => "-5",
-        'money' => "-150"
+        'xiangsidu' => (string)(number_format($similarities[$combo->combo_id],2)*100).'%',
+        'count' => $combo->item_count-count($item_ids),
+        'money' => number_format($combo->price - $item_all_price,2)
       ];
     }
 
     return \Yz::Return(true, "查询完成", ['combos' => $combos]);
   }
+  function jaccard_similarity($set1, $set2) {
+    // 计算交集
+    $intersection = array_intersect($set1, $set2);
+    // 计算并集
+    $union = array_unique(array_merge($set1, $set2));
+
+    // 避免除数为0的情况
+    if (count($union) == 0) return 0;
+
+    // 返回Jaccard相似度
+    return count($intersection) / count($union);
+  }
 }