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alecho/object-mayhem.php

Last active June 11, 2016 18:31
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object-mayhem.php
<?php
$gameName = 'War';
class Deck
{
public $suits = ['S', 'H', 'C', 'D'];
public $indices = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13];
protected $deck = [];
public function __construct()
{
$this->create();
}
/**
* Returns and array of arrays representing cards
* in a specific order.
*/
public function create()
{
foreach($this->suits as $suit) {
foreach($this->indices as $index) {
$this->deck[] = $this->createCard($suit, $index);
}
}
return $this;
}
/**
* Return an array with indices for _properties_
* of a playing card.
*/
public function createCard($suit, $index)
{
return ['suit' => $suit, 'index' => $index];
}
/**
* Iterate through a deck and print each card.
* Returns void.
* NOTE: This function name won't work on < PHP 7
* This is because `print` is a reserved word. In
* PHP 7 it seems that PHP is smart enough to realize
* that it's a function name and not a keyword.
*/
public function print()
{
echo '<pre>';
foreach($this->deck as $card) {
$this->printCard($card);
}
echo '</pre>';
return $this;
}
/**
* Shuffles a deck regardless of the deck's current
* state and reutns the shuffled deck;
*/
public function shuffle()
{
shuffle($this->deck);
return $this;
}
/**
* Return the number of cards the deck
*/
public function size()
{
return count($this->deck);
}
/**
* Return the last card from the deck, shortening
* the deck by one card. With a face down deck this
* is equivalant to dealing a single card.
*/
public function pop()
{
return array_pop($this->deck);
}
/**
* Add a card to the end of a deck. With a face down
* deck this is equivalant to putting a card back on
* top of the deck.
*/
public function push($card)
{
return array_push($this->deck, $card);
}
/**
* Remove and return the first card in the deck. With
* a face down deck this is equivalant to dealing the
* bottom card.
*/
public function shift()
{
return array_shift($this->deck);
}
/**
* Prepends a card to the beginning of the deck. With
* a face down deck this is equivalant putting the card
* on the bottom of the deck.
*/
public function unshift($card)
{
return array_unshift($this->deck, $card);
}
/**
* Echo a card suitable for HTML display
*/
public function printCard($card)
{
$suit = '';
if ($card['suit'] == 'S') {
$suit = '&spades;';
}
if ($card['suit'] == 'D') {
$suit = '&diams;';
}
if ($card['suit'] == 'C') {
$suit = '&clubs;';
}
if ($card['suit'] == 'H') {
$suit = '&hearts;';
}
echo $card['index'] . $suit . "\n";
}
}
/**
* Returns an array with $hands number of new Deck
* class objects with no more than $limit cards per
* hand.
*/
function deal($deck, $hands = 2, $limit = null)
{
// We don't need 'hands' and 'deck' keys here but we
// should return an array. Try renaming $out to $hands
// in this method.
$out = ['hands' => [], 'deck' => null];
if ($limit == null) {
$limit = count($deck);
}
for($i=0; $i<$limit; $i++) {
// This looks a lot like out new `pop()` method
$topAndDeck = getTopCardFromDeck($deck);
// We won't need to keep track of the deck here
$deck = $topAndDeck['deck'];
// Hmm... Hands seems a lot like decks. We should be
// able to return an array of decks
$out['hands'][($i % $hands)][] = $topAndDeck['card'];
}
// We don't need to return the deck. Our `$deck` property
// keeps track of it for us.
$out['deck'] = $deck;
return $out;
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<title><?= $gameName ?></title>
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<h1><?= $gameName ?></h1>
<h3>New Deck:</h3>
<?php
$deck = new Deck();
$deck->print();
?>
<h3>Pop:</h3>
<?php
$card = $deck->pop();
$deck->print();
?>
<h3>Push (our poped card):</h3>
<?php
$deck->push($card);
$deck->print();
?>
<h3>Shift:</h3>
<?php
$card = $deck->shift();
$deck->print();
?>
<h3>Unshift (our shifted card):</h3>
<?php
$deck->unshift($card);
$deck->print();
?>
<h3>Shuffle</h3>
<?php
$deck->shuffle();
$deck->print();
?>
</div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.3/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
@alecho
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alecho commented May 20, 2016

Things to do

  1. Move the other <verb>Deck() functions into the Deck class. Remember to adjust for scope and context.
  2. Create an empty Card class.
  3. Move the <verb>Card() functions into the Card class. Don't forget printCard in the Deck class.
  4. Here's the fun part; modify the Deck methods that return a "card" (or an array with properties of a card) to use the Card class. Don't forget to use the new keyword when creating new objects.

Bonus

Make our Deck and Card classes know how to echo or print themselves. For example:

$myDeck = new Deck();
echo $mydeck;

// Should give us the same output as
$myDeck = new Deck();
$myDeck->print();

Hints: Because we want to echo the deck we can remove the echo statements from Deck::print(). You'll want to use the __toString method: http://php.net/manual/en/language.oop5.magic.php#object.tostring

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