ldc-crm/app/Http/Controllers/CustomerController.php

<?php

namespace App\Http\Controllers;

use App\Models\Brand;
use App\Models\Customer;
use App\Models\CustomerInfo;
use App\Models\CustomerLogin;

class CustomerController extends Controller
{
    public function index()
    {
        $brands = Brand::select('id', 'name')->get();
        return view('customers.index', compact('brands'));
    }

    public function show($id, $brandId)
    {
        $CustomerInfo  = CustomerInfo::where([['customer_id', $id], ['brand_id', $brandId]])->first();
        $customerLogin = CustomerLogin::where([['customer_id', $id], ['brand_id', $brandId]])->first();
        if (!$CustomerInfo) {
            abort(404);
        }
        return view('customers.show', compact('CustomerInfo', 'customerLogin'));
    }

    public function filter($texte, $brandId = null)
    {
        if ($brandId !== null) {
            $customers = Customer::join('customer_infos', 'customers.id', '=', 'customer_infos.customer_id')->join('customer_login', 'customers.id', '=', 'customer_login.customer_id')->select(
                'customer_infos.customer_id',
                'customer_infos.firstname',
                'customer_infos.lastname',
                'customer_infos.opt_in',
                'customers.email',
                'customer_infos.brand_id',
                'customer_login.last_connection'
            )->where([
                    ['lastname', 'like', '%' . $texte . '%'],
                    ['customer_infos.brand_id', $brandId],
                    ['customer_login.brand_id', $brandId]
                ])->orWhere([
                    ['email', 'like', '%' . $texte . '%'],
                    ['customer_infos.brand_id', $brandId],
                    ['customer_login.brand_id', $brandId]
                ])->get();
        } else {
            $customers = CustomerInfo::join('customers', 'customers.id', '=', 'customer_infos.customer_id')->join('customer_login', function ($join) {
                    $join->on('customer_login.customer_id', '=', 'customer_infos.customer_id');
                    $join->on('customer_login.brand_id', '=', 'customer_infos.brand_id');
            })->select(
                'customer_infos.customer_id',
                'customer_infos.firstname',
                'customer_infos.lastname',
                'customer_infos.opt_in',
                'customers.email',
                'customer_infos.brand_id',
                'customer_login.last_connection'
            )->where('lastname', 'like', '%' . $texte . '%')->orWhere('email', 'like', '%' . $texte . '%')->get();
        }

        return response()->json($customers);
    }
}