game/_incl_data/class/Learming.php

<?php

use Core\Db;

class Learming
{
    private $uid;
    private $shouldStartLearning;

    public function __construct()
    {
        /** @var User $user */
        $user = User::start();
        $this->uid = $user->info['id'];
        $this->shouldStartLearning = $user->info['shouldStartLearning'];
    }

    public function getLearningStatus()
    {
        if (!isset($this->shouldStartLearning)) {
            Db::sql('insert into users_learming (uid) value (?)' ,
                    [$this->uid]);
            return 1;
        }
        return (bool)$this->shouldStartLearning;
    }

    public function hasLearned()
    {
        if (!isset($this->shouldStartLearning)) {
            return false;
        }
        $this->shouldStartLearning = 0;
        $this->save();
        return true;
    }

    private function save()
    {
        if (empty($this->uid) || empty($this->shouldStartLearning)) {
            return;
        }
        Db::sql('replace into users_learming (uid, shouldStartLearming) values (?,?)',
                [$this->uid, $this->shouldStartLearning]);
    }
}