ldc-crm/app/Http/Controllers/Api/V4/QuestionController.php

<?php

namespace App\Http\Controllers\Api\V4;

use App\Http\Controllers\Controller;
use App\Http\Resources\Api\V4\QuestionsResource;
use App\Models\Answer;
use App\Models\Customer;
use App\Models\Question;
use App\Models\Service;

class QuestionController extends Controller
{
    /**
     * Returns all service questions.
     *
     * @param \App\Models\Service $service
     * @return \Illuminate\Http\Resources\Json\ResourceCollection
     */
    public function index(Service $service): \Illuminate\Http\Resources\Json\ResourceCollection
    {
        return new QuestionsResource($service->brand->questions);
    }

    /**
     * Returns all service questions with user answers for all of them.
     *
     * @param \App\Models\Service  $service
     * @param \App\Models\Customer $customer
     * @return \Illuminate\Http\Resources\Json\ResourceCollection
     */
    public function indexWithResponse(
        Service $service,
        Customer $customer
    ): \Illuminate\Http\Resources\Json\ResourceCollection {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        $customerAnswers = $customer->getAnswers($service);
        return new QuestionsResource($service->brand->questions, $customerAnswers);
    }

    /**
     * Returns all service questions that was not answered by a user.
     *
     * @param \App\Models\Service  $service
     * @param \App\Models\Customer $customer
     * @return \Illuminate\Http\Resources\Json\JsonResource
     */
    public function unAnsweredBy(Service $service, Customer $customer): \Illuminate\Http\Resources\Json\JsonResource
    {
        // * Make sure we are accessing a customer that belongs to our service.
        $this->authorize('customerBelongsToService', $customer);

        $questions = Question::query()
            ->whereHas('brand', function ($q) use ($service) {
                $q->where('id', $service->brand->id);
            })
            ->whereDoesntHave('answers', function ($q) use ($customer) {
                $q->whereIn('id', Answer::query()->whereHas('customers', function ($q) use ($customer) {
                    $q->where('id', $customer->id);
                })->pluck('id'));
            })
            ->with('answers')
            ->get();
        return new QuestionsResource($questions);
    }
}