applicant-site/app/Http/Controllers/Api/CalculatorController.php

<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Department;
use App\Models\Direction;
use App\Models\EntranceExamination;
use App\Models\Faculty;
use Illuminate\Http\Request;

class CalculatorController extends Controller
{
    public function findDirectionFromSubjects(Request $request)
    {
        $getJSON = $request->input()['predmets'];
        $getsSubjects = json_decode($getJSON);
        $countUserSubjects = count($getsSubjects);

        $filteredDirectionIds = EntranceExamination::all()
            ->select("direction_id", "subject_id")
            ->groupBy('direction_id')
            ->map(function ($direction) {
                return $direction->map(fn($item) => $item['subject_id']);
            })
            ->filter(fn($direction) => count($direction) <= $countUserSubjects)->keys();

        $directions = Direction::whereIn('id', $filteredDirectionIds)->get();


        $generateHtml = function ($acc, $direction) {
            $department = Department::find($direction->department_id);
            $faculty = Faculty::find($department->faculty_id);
            // phpcs:disable
            return "{$acc} <tr class=\"\">
                    <td id=\"faculty\"> {$faculty->name} </td>
                    <td>
                        <a class=\" border border-white rounded-3 p-2 hover1\" type=\"button\" data-bs-toggle=\"offcanvas\" data-bs-target=\"#offcanvasScrolling-{$direction->id}{$direction->id }\" aria-controls=\"offcanvasScrolling\" role=\"button\">{$direction->name}</a>
                        <div class=\"offcanvas offcanvas-bottom text-dark\" data-bs-scroll=\"true\" data-bs-backdrop=\"false\" tabindex=\"-1\" id=\"offcanvasScrolling-{$direction->id }{$direction->id }\" aria-labelledby=\"offcanvasScrollingLabel-{$direction->id}{$direction->id }\" style=\"height: 100%; font-family: Geologica-Medium;overflow-y: auto ;\">
                                                                        <div class=\"mx-5\">
                                                                            <div class=\"col-12 d-flex justify-content-end mt-4\">
                                                                                <button type=\"button\" class=\"btn-close text-reset\" data-bs-dismiss=\"offcanvas\" aria-label=\"Close\"></button>
                                                                            </div>
                                                                            <div class=\"row\">
                                                                                    <div class=\"col-xl-3 col-12\">
                                                                                        <div class=\"display-5 \" style=\"font-family: Geologica-Light\"> {$direction->code} </div>
                                                                                        <div class=\"display-5 \" > {$direction->name}</div>
                                                                                    </div>


                                                                            </div>
                                                                            <div class=\"row\">

                                                                                <div class=\"col-xl-3 col-12\">
                                                                                    <br>
                                                                                    <br>
                                                                                    <div> Уровень образования: <span style=\"font-family: Geologica-Light\">{$direction->educationLevel->name} </span> </div>
                                                                                    <div> Форма обучения: <span style=\"font-family: Geologica-Light\">{$direction->educationForm->name} </span></div>
                                                                                </div>
                                                                                <div class=\"col-xl-3 col-12\">
                                                                                    <br>
                                                                                    <br>
                                                                                    <div> Бюджетные места: <span style=\"font-family: Geologica-Light\">{$direction->budget_places} </span> </div>
                                                                                    <div> Квота: <span style=\"font-family: Geologica-Light\">{$direction->quota} </span></div>
                                                                                </div>
                                                                                <div class=\"col-xl-3 col-12\">
                                                                                    <br>
                                                                                    <br>
                                                                                    <div> Места на контракт: <span style=\"font-family: Geologica-Light\">{$direction->paid_places} </span> </div>
                                                                                    <div> Стоимость платного обучения: <span style=\"font-family: Geologica-Light\">{$direction->cost_paid_place} </span></div>
                                                                                </div>
                                                                                <div class=\"col-xl-3 col-12\">
                                                                                    <br>
                                                                                    <br>
                                                                                    <div> Период обучения (в годах): <span style=\"font-family: Geologica-Light\">{$direction->period} </span> </div>

                                                                                </div>
                                                                            </div>


                                                                            <div class=\"offcanvas-body mt-2\" style=\"font-family: Geologica-ExtraLight\">
                                                                                <p style=\"text-align: justify;\">{$direction->description}</p>


                                                                            </div>
                                                                        </div>

                                                                    </div>
                    </td>

                    <td class=\"text-end\"> {$direction->period} </td>
                    </tr>";
        };
        // phpcs:enable
        $html = $directions->reduce($generateHtml, '');

        return response()->json(['html' => $html]);
    }
}