#28 - php

Author: miguelex

Roadmap/28 - SOLID LSP/php/miguelex.php

@@ -0,0 +1,170 @@
+<?php
+
+    // Ejercicio basico sin LSP
+
+    class Bird {
+        public function fly() {
+            return "Puedo volar\n";
+        }
+    }
+
+    class Canary extends Bird {
+
+        public function name(){
+            return "Soy un canario\n";
+        }
+    }
+
+    class Ostrich extends Bird {
+
+        public function name(){
+            return "Soy un avestruz\n";
+        }
+
+        public function fly() {
+            return "No puedo volar (sobreescribi el método)\n";
+        }
+    }
+
+    echo "Sin LSP\n";
+    $canary = new Canary();
+    echo $canary->name();
+    echo $canary->fly();
+
+    $ostrich = new Ostrich();
+    echo $ostrich->name();
+    echo $ostrich->fly();
+
+    // Vemos que hemos tenido que sobreescribir el metodo fly para el avestruz. Esto incumple el LSP
+
+    // Ejercicio basico con LSP
+
+    interface Bird2 {
+        public function fly();
+    }
+
+    class Canary2 implements Bird2 {
+
+        public function name(){
+            return "Soy un canario\n";
+        }
+
+        public function fly() {
+            return "Puedo volar\n";
+        }
+    }
+
+    class Ostrich2 implements Bird2 {
+
+        public function name(){
+            return "Soy un avestruz\n";
+        }
+
+        public function fly() {
+            return "No puedo volar\n";
+        }
+    }
+
+    echo "\n";
+    echo "Con LSP\n";
+    $canary2 = new Canary2();
+    echo $canary2->name();
+    echo $canary2->fly();
+    echo "\n";
+    $ostrich2 = new Ostrich2();
+    echo $ostrich2->name();
+    echo $ostrich2->fly();
+
+    //Al tener la interface no me ha sido necesario sobreescribir nada. Lo implemento (o no) segun mis necesidades
+
+    // Ejercicio Extra
+
+    echo "\n";
+    echo "Ejercicio Extra\n";
+
+    interface Vehicle {
+        public function speed();
+        public function accelerate();
+        public function brake();
+    }
+
+    class Car implements Vehicle {
+        private $speed;
+
+        public function __construct(){
+            $this->speed = 0;
+        }
+
+        public function speed(){
+            return $this->speed;
+        }
+
+        public function accelerate(){
+            $this->speed += 10;
+        }
+
+        public function brake(){
+            $this->speed -= 10;
+        }
+    }
+
+    class Bicycle implements Vehicle {
+        private $speed;
+
+        public function __construct(){
+            $this->speed = 0;
+        }
+
+        public function speed(){
+            return $this->speed;
+        }
+
+        public function accelerate(){
+            $this->speed += 5;
+        }
+
+        public function brake(){
+            $this->speed -= 5;
+        }
+    }
+
+    class Truck implements Vehicle {
+        private $speed;
+
+        public function __construct(){
+            $this->speed = 0;
+        }
+
+        public function speed(){
+            return $this->speed;
+        }
+
+        public function accelerate(){
+            $this->speed += 2;
+        }
+
+        public function brake(){
+            $this->speed -= 2;
+        }
+    }
+
+    function testVehicle(Vehicle $vehicle){
+        echo "Velocidad: ".$vehicle->speed()."\n";
+        $vehicle->accelerate();
+        echo "Velocidad: ".$vehicle->speed()."\n";
+        $vehicle->accelerate();
+        echo "Velocidad: ".$vehicle->speed()."\n";
+        $vehicle->brake();
+        echo "Velocidad: ".$vehicle->speed()."\n";
+    }
+
+    $car = new Car();
+    $bike = new Bicycle();
+    $truck = new Truck();
+
+    echo "Vamos a probar el coche:\n";
+    testVehicle($car);
+    echo "Vamos a probar la bicicleta:\n";
+    testVehicle($bike);
+    echo "Vamos a probar el camion:\n";
+    testVehicle($truck);