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/home/yanggyein/yanggyein/yanggyein/app/Exports/FarmsExport.php

<?php

namespace App\Exports;

use App\Category;
use App\Farm;
use App\Nvr;
use Illuminate\Contracts\View\View;
use Maatwebsite\Excel\Concerns\FromView;

class FarmsExport implements FromView
{
    protected $year;
    protected $company;
    protected $medium;
    public function __construct($year, $company)
    {
        $this->year = $year;
        $this->company = $company;
    }
    public function view(): View
    {
        switch ($this->company) {
            case 'all':
                $this->medium = '%%';
                break;

case 'cr':
                $this->medium = '체리부로';
                break;
            case 'hw':
                $this->medium = '한국원종';
                break;
            case 'cfn':
                $this->medium = '한라CFN';
                break;
            case 'gg':
                $this->medium = '금계';
                break;
            case 'hn':
                $this->medium = '해나루';
                break;
            case 'cs':
                $this->medium = '청솔';
                break;
            case 'jw':
                $this->medium = '정우식품';
                break;
            case 'etc':
                $this->medium = '기타';
                break;
            default:
                $this->medium = '%%';
                break;
        }
        $farms =  Farm::join('categories', 'farms.contract_company', '=', 'categories.id')->leftJoin('nvrs', 'farms.id', '=', 'nvrs.farm_id')->leftJoin('lprs', 'farms.id', '=', 'lprs.farm_id')->where('categories.medium', 'like', $this->medium)->select(
            'farms.check',
            'farms.check_note',
            'farms.check_date',
            'categories.medium',
            'farms.farm_owner',
            'farms.farm_name',
            'farms.farm_location',
            'farms.farm_address',
            'farms.farm_contact',
            'farms.count_dong',
            'nvrs.firmware',
            'nvrs.ddns',
            'nvrs.nvr_id',
            'nvrs.nvr_pw',
            'lprs.channel'
        )->addSelect(['contract_type' => Category::select('medium')->whereColumn('id', 'farms.contract_type')])
            ->addSelect(['set_company' => Category::select('medium')->whereColumn('id', 'farms.set_company')])
            ->addSelect(['set_type' => Category::select('medium')->whereColumn('id', 'farms.set_type')])
            ->addSelect(['count_channel' => Nvr::select('count_channel')->whereColumn('farm_id', 'farms.id')])
            ->get();

return view('excel.farms', [
            'farms' => $farms,
        ]);
    }

// public function headings(): array
    // {
    //     $head = [
    //         '계열사',
    //         '농장주',
    //         '농가명',
    //         '지역',
    //         '주소',
    //         '전화번호',
    //         '동수',
    //         '펌웨어',
    //         'DDNS',
    //         'ID',
    //         'PW',
    //         '계약유형',
    //         '설치업체',
    //         '설치타입',
    //         '채널수',
    //     ];
    //     return $head;
    // }
}