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(Customer $customer, Brand $brand)
    {
        $customerInfos = CustomerInfo::where('customer_id', $customer->id)
            ->where('brand_id', $brand->id)->firstOrFail();
        $customerLogin = CustomerLogin::where('customer_id', $customer->id)
            ->where('brand_id', $brand->id)->first();
        return view('customers.show', compact('customerInfos', 'customerLogin'));
    }

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

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