<?php

class Produk {
    public $judul,
           $penulis,
           $penerbit,
           $harga;

    public function __construct($judul = "judul", $penulis = "penulis", $penerbit = "penerbit", $harga = 0) {
        $this->judul = $judul;
        $this->penulis = $penulis;
        $this->penerbit = $penerbit;
        $this->harga = $harga;
    }

    public function getLabel() {
        return "$this->penulis, $this->penerbit";
    }

    public function getInfoProduk() {
        $str = "{$this->judul} | {$this->getLabel()} (Rp. {$this->harga})";

        return $str;
    }

}

class Komik extends Produk {
    public $jmlHalaman;

    public function __construct($judul = "judul", $penulis = "penulis", $penerbit = "penerbit", $harga = 0, $jmlHalaman = 0) {
        parent::__construct($judul, $penulis, $penerbit, $harga);

        $this->jmlHalaman = $jmlHalaman;
    }

    public function getInfoProduk() {
        $str = "Komik : " . parent::getInfoProduk() . " - {$this->jmlHalaman} Halaman.";
        return $str;
    }
}

class Game extends Produk {
    public $waktuMain;

    public function __construct($judul = "judul", $penulis = "penulis", $penerbit = "penerbit", $harga = 0, $waktuMain = 0) {
        parent::__construct($judul, $penulis, $penerbit, $harga);

        $this->waktuMain = $waktuMain;
    }

    public function getInfoProduk() {
        $str = "Game : " . parent::getInfoProduk() . " ~ {$this->waktuMain} Jam.";
        return $str;
    }
}

class CetakInfoProduk {
    public function cetak( Produk $produk ) {
        $str = "{$produk->judul} | {$produk->getLabel()} (Rp. {$produk->harga})";
        return $str;
    }
}


$produk1 = new Komik("Naruto", "Masashi Kishimoto", "Shonen Jump", 30000, 100);
$produk2 = new Game("Uncharted", "Neil Druckmann", "Sony Computer", 250000, 50);

echo $produk1->getInfoProduk();
echo "<br>";
echo $produk2->getInfoProduk();