<?php

class Genres
{

    private $db;
    private $genres = [];

    public function __construct($db)
    {

        $this->db = $db;
        if (!$this->load_all_genres()) {
            return false;
        } else {
            return true;
        }

    }

    private function load_all_genres(): bool
    {
        $genres = $this->get_all_genres();
        if ($genres) {
            $this->genres = $genres;
            return true;
        } else {
            return false;
        }


    }

    public function get_all_genres($order = "ASC")
    {
        $stmt = $this->db->prepare("SELECT * FROM genres ORDER BY name $order");
        $stmt->execute();
        $result = $stmt->get_result();
        $genres = $result->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
        return $genres;
    }

    public function get_nonzero_genres()
    {
        $stmt = $this->db->prepare("SELECT * FROM genres WHERE count > 0 ORDER BY name ASC");
        $stmt->execute();
        $result = $stmt->get_result();
        $genres = $result->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
        return $genres;
    }
}