<?php
namespace addons\Course\common\services;

use common\models\goods\Goods;
use common\models\order\Order;

class CourseActivityService
{
    public static function getList(array $list, int $mall_id) :array
    {
        if (empty($list) || empty($mall_id)) return [];

        $goods_ids = array_column($list, 'goods_id');

        $good_list = Goods::lists([
            'where' => [['id' => $goods_ids]],
            'select' => 'id,price,original_price',
            'index' => 'id'
        ]);

        //统计每个课程活动的购买情况
        $statistics_data = Order::find()
            ->where(['mall_id' => $mall_id, 'marketing_type' => 'Course'])
            ->groupBy('marketing_id')
            ->select(['marketing_id', 'COUNT(*) as order_count'])
            ->indexBy('marketing_id')
            ->asArray()
            ->all();

        foreach ($list as &$item) {
            $good_info = $good_list[$item['goods_id']];
            $item['price'] = $good_info['price'] ?? 0;
            $item['original_price'] = $good_info['original_price'] ?? 0;
            $item['views'] = $statistics_data[$item['id']]['order_count'] ?? 0;
        }
        return $list;
    }
}