Move classes to separate files

php/src/AgedBrieCommand.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+final class AgedBrieCommand implements Command
+{
+    public function execute(Item $item): void
+    {
+        $item->decreaseSellDate();
+
+        $item->increaseQuality();
+        if ($item->isSellDatePassed()) {
+            $item->increaseQuality();
+        }
+    }
+}

php/src/BackstageCommand.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+final class BackstageCommand implements Command
+{
+    public function execute(Item $item): void
+    {
+        $item->decreaseSellDate();
+
+        if ($item->isSellDatePassed()) {
+            $item->quality = 0;
+            return;
+        }
+
+        $item->increaseQuality();
+        if ($item->sell_in <= 10) {
+            $item->increaseQuality();
+        }
+
+        if ($item->sell_in <= 5) {
+            $item->increaseQuality();
+        }
+    }
+}

php/src/Command.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+interface Command
+{
+    public function execute(Item $item): void;
+}

php/src/CommandFactory.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+final class CommandFactory
+{
+    private const SULFURAS_HAND_OF_RAGNAROS = 'Sulfuras, Hand of Ragnaros';
+    private const BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT = 'Backstage passes to a TAFKAL80ETC concert';
+    private const AGED_BRIE = 'Aged Brie';
+
+    public function createFor(string $itemName): Command
+    {
+        if ($itemName === self::AGED_BRIE) {
+            return new AgedBrieCommand();
+        }
+
+        if ($itemName === self::BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT) {
+            return new BackstageCommand();
+        }
+
+        if (in_array($itemName,
+                [
+                    self::AGED_BRIE,
+                    self::BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT,
+                    self::SULFURAS_HAND_OF_RAGNAROS
+                ]
+            ) === false) {
+            return new NormalCommand();
+        }
+
+        return new NoopCommand();
+    }
+}

php/src/GildedRose.php

@@ -28,93 +28,3 @@ final class GildedRose
     }
 }
 
-
-interface Command
-{
-    public function execute(Item $item): void;
-}
-
-final class CommandFactory
-{
-    private const SULFURAS_HAND_OF_RAGNAROS = 'Sulfuras, Hand of Ragnaros';
-    private const BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT = 'Backstage passes to a TAFKAL80ETC concert';
-    private const AGED_BRIE = 'Aged Brie';
-
-    public function createFor(string $itemName): Command
-    {
-        if ($itemName === self::AGED_BRIE) {
-            return new AgedBrieCommand();
-        }
-
-        if ($itemName === self::BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT) {
-            return new BackstageCommand();
-        }
-
-        if (in_array($itemName,
-                [
-                    self::AGED_BRIE,
-                    self::BACKSTAGE_PASSES_TO_A_TAFKAL_80_ETC_CONCERT,
-                    self::SULFURAS_HAND_OF_RAGNAROS
-                ]
-            ) === false) {
-            return new NormalCommand();
-        }
-
-        return new NoopCommand();
-    }
-}
-
-final class AgedBrieCommand implements Command
-{
-    public function execute(Item $item): void
-    {
-        $item->decreaseSellDate();
-
-        $item->increaseQuality();
-        if ($item->isSellDatePassed()) {
-            $item->increaseQuality();
-        }
-    }
-}
-
-final class BackstageCommand implements Command
-{
-    public function execute(Item $item): void
-    {
-        $item->decreaseSellDate();
-
-        if ($item->isSellDatePassed()) {
-            $item->quality = 0;
-            return;
-        }
-
-        $item->increaseQuality();
-        if ($item->sell_in <= 10) {
-            $item->increaseQuality();
-        }
-
-        if ($item->sell_in <= 5) {
-            $item->increaseQuality();
-        }
-    }
-}
-
-final class NormalCommand implements Command
-{
-    public function execute(Item $item): void
-    {
-        $item->decreaseSellDate();
-        $item->decreaseQuality();
-        if ($item->isSellDatePassed()) {
-            $item->decreaseQuality();
-        }
-    }
-}
-
-final class NoopCommand implements Command
-{
-    public function execute(Item $item): void
-    {
-        // noop
-    }
-}

php/src/NoopCommand.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+final class NoopCommand implements Command
+{
+    public function execute(Item $item): void
+    {
+        // noop
+    }
+}

php/src/NormalCommand.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GildedRose;
+
+final class NormalCommand implements Command
+{
+    public function execute(Item $item): void
+    {
+        $item->decreaseSellDate();
+        $item->decreaseQuality();
+        if ($item->isSellDatePassed()) {
+            $item->decreaseQuality();
+        }
+    }
+}