<?php

namespace App\Service;

use App\Model\Customer\Customer;
use App\Model\Customer\CustomerFollow;
use App\Utils\ThrowException;

class CustomerService
{
    /**
     * @param Customer $customer
     * @param Customer $follower
     * @return void
     */
    public function follow(Customer $customer, Customer $follower){

        ThrowException::isTrue($customer->id == $follower->id, '不能关注自己');

        /** @var CustomerFollow $cf */
        $cf = CustomerFollow::withTrashed()->where('follower_id', $follower->id)
            ->where('customer_id', $customer->id)
            ->first();
        if (!$cf) {
            $cf = new CustomerFollow();
            $cf->customer_id = $customer->id;
            $cf->follower_id = $follower->id;
            $cf->save();
        } else {
            if ($cf->trashed()) {
                $cf->restore();
            } else {
                $cf->delete();
            }
        }
        // 刷新关注人数和粉丝数
        $customer->refreshFollowerFans();
        $follower->refreshFollowerFans();
    }
}