Game-Jaming/Backend/Controllers/Polls/GetWinner.php

<?php
require_once "../../../bootstrap.php";
require_once "../Admin/Admin.php";

use Backend\Models\Group;
use Backend\Models\Vote;
use \Illuminate\Support\Collection;

if (isAdmin()) {
    if (isset($_GET['gameJamId'])) {
        $groups = Group::where('game_jam_id', $_GET['gameJamId'])->get();
        if ($groups) {
            $winningGroups = new Collection();
            $i = -1;
            foreach ($groups as $group) {
                $x = Vote::where('group_id', $group->id)->count();
                if ($x > $i) {
                    $winningGroups = new Collection();
                    $winningGroups->push($group);

                    $i = $x;
                } elseif ($i === $x) {
                    $winningGroups->push($group);
                }
            }

            header("Access-Control-Allow-Methods: GET");
            header("Access-Control-Allow-Headers: X-Requested-With, Content-Type, Accept");
            header('Content-Type: application/json;charset=UTF-8');
            echo json_encode(array('data' => $winningGroups->jsonSerialize()));
        } else {
            http_response_code(400);
            echo json_encode(["message" => "game jam not found"]);
        }
    } else {
        http_response_code(400);
    }

} else {
    http_response_code(401);
    echo json_encode(["message" => "not admin"]);
}