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clemirclemir
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Lesson 22 immutable objects
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‎README.md

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@@ -63,7 +63,7 @@ Este curso explica programación orientada a objetos desde cero, para verlo sól
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21. [Iteración de objetos](https://styde.net/iteracion-de-objetos-en-php/) - 11:57
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22. Objetos inmutables
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22. [Objetos inmutables](https://styde.net/objetos-inmutables-en-php/) - 21:29
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23. Comparación entre objetos
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‎lesson22/composer.json

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{
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"name": "styde/oop",
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"description": "Proyecto demo para el curso de programacion orientada a objetos",
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"type": "project",
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"license": "MIT",
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"authors": [
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{
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"name": "Duilio Palacios",
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"email": "[email protected]"
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}
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],
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"require": {},
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"autoload": {
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"psr-4": {
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"Styde\\": "src/"
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}
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}
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}

‎lesson22/public/index.php

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<?php
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require '../vendor/autoload.php';
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use Styde\User;
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use Styde\Food;
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use Styde\LunchBox;
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$gordon = new User(['name' => 'Gordon']);
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// Daughter
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$joanie = new User(['name' => 'Joanie']);
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$lunchBox = new LunchBox(['Sandwich', 'Papas', 'Jugo de naranja', 'Manzana']);
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$lunchBox = new LunchBox([
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new Food(['name' => 'Sandwich', 'beverage' => false]),
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new Food(['name' => 'Papas']),
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new Food(['name' => 'Jugo de naranja', 'beverage' => true]),
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new Food(['name' => 'Manzana']),
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new Food(['name' => 'Agua', 'beverage' => true]),
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]);
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// House
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$joanie->setLunch($lunchBox);
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// School
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$joanie->eatMeal();
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‎lesson22/public/time.php

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<?php
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class Time {
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protected $time = null;
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public function __construct($time = null)
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{
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$this->time = $time ?: time();
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}
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public function __toString()
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{
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return date('d/m/Y H:i:s', $this->time);
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}
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public function tomorrow()
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{
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return new Time($this->time + 24*60*60);
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}
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public function yesterday()
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{
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return new Time($this->time - 24*60*60);
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}
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}
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$today = new Time();
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$today2 = new Time();
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echo "<p>Hoy es {$today2}</p>";
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$tomorrow = $today->tomorrow();
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echo "<p>Mañana será {$tomorrow}</p>";
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echo "<p>Pasado mañana será {$tomorrow->tomorrow()}</p>";
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echo "<p>Ayer fue {$today->yesterday()}</p>";
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‎lesson22/src/Food.php

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<?php
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namespace Styde;
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class Food extends Model {
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public function getBeverageAttribute()
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{
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return $this->attributes['beverage'] ?? false;
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}
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}

‎lesson22/src/HtmlNode.php

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<?php
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namespace Styde;
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class HtmlNode
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{
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protected $tag;
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protected $content;
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protected $attributes = [];
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public function __construct($tag, $content = null, $attributes = [])
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{
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$this->tag = $tag;
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$this->content = $content;
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$this->attributes = $attributes;
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}
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public function __invoke($name, $default = null)
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{
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return $this->get($name, $default);
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}
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public function get($name, $default = null)
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{
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return $this->attributes[$name] ?? $default;
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}
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public static function __callStatic($method, array $args = [])
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{
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$content = isset($args[0]) ? $args[0] : null;
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$attributes = isset($args[1]) ? $args[1] : [];
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return new HtmlNode($method, $content, $attributes);
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}
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public function __toString()
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{
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return $this->render();
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}
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public function __call($method, array $args = [])
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{
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if (! isset ($args[0])) {
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throw new \Exception(
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"You forgot to pass the value to the attribute $method"
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);
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}
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$this->attributes[$method] = $args[0];
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return $this;
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}
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public function render()
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{
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$result = "<{$this->tag} {$this->renderAttributes()}>";
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if ($this->content != null) {
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$result .= $this->content;
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$result .= "</{$this->tag}>";
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}
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return $result;
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}
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protected function renderAttributes()
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{
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$result = "";
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foreach ($this->attributes as $name => $value)
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{
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$result .= sprintf(' %s="%s"', $name, $value);
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}
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return $result;
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}
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}
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‎lesson22/src/LunchBox.php

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<?php
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namespace Styde;
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class LunchBox implements \IteratorAggregate, \Countable
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{
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protected $food = [];
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protected $original = true;
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public function __construct(array $food = [])
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{
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$this->food = $food;
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}
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public function __clone()
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{
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$this->original = false;
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}
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public function all()
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{
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return $this->food;
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}
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public function filter($callback)
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{
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return new static(array_filter($this->food, $callback));
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}
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public function shift()
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{
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return array_shift($this->food);
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}
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public function isEmpty()
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{
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return empty($this->food);
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}
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public function getIterator()
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{
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return new \ArrayIterator($this->food);
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}
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public function count()
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{
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return count($this->food);
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}
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}
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‎lesson22/src/Model.php

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<?php
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namespace Styde;
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abstract class Model
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{
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protected $attributes = [];
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public function __construct(array $attributes = [])
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{
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$this->fill($attributes);
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}
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public function fill(array $attributes = [])
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{
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$this->attributes = $attributes;
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}
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public function getAttributes()
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{
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return $this->attributes;
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}
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public function getAttribute($name)
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{
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$value = $this->getAttributeValue($name);
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if ($this->hasGetMutator($name)) {
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return $this->mutateAttribute($name, $value);
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}
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return $value;
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}
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protected function hasGetMutator($name)
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{
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return method_exists($this, 'get'.Str::studly($name).'Attribute');
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}
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protected function mutateAttribute($name, $value)
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{
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return $this->{'get'.Str::studly($name).'Attribute'}($value);
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}
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public function getAttributeValue($name)
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{
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if (array_key_exists($name, $this->attributes)) {
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return $this->attributes[$name];
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}
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}
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public function setAttribute($name, $value)
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{
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$this->attributes[$name] = $value;
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}
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public function __set($name, $value)
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{
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$this->setAttribute($name, $value);
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}
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public function __get($name)
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{
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return $this->getAttribute($name);
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}
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public function __isset($name)
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{
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return isset($this->attributes[$name]);
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}
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public function __unset($name)
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{
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unset ($this->attributes[$name]);
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}
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}

‎lesson22/src/Str.php

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<?php
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namespace Styde;
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class Str
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{
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public static function studly($value)
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{
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$result = ucwords(str_replace('_', ' ', $value));
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return str_replace(' ', '', $result);
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}
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public static function snake($value)
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{
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$result = preg_replace("@([A-Z])@", "_$1", $value);
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return strtolower(trim($result, '_'));
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}
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}

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