add proxy design pattern and test

Author: basherr

app/Commands/CreateTestFileCommand.php

@@ -20,6 +20,7 @@ public function __construct(string $className)
   */
   public function handle()
   {
+    $this->_className .= 'Test';
     $stub = file_get_contents(__DIR__ . '/../../stubs/Test.stub');
     $content = str_replace('class Test', 'class '. $this->_className, $stub);
     file_put_contents(__DIR__ . '/../../tests/' . $this->_className . '.php', $content);

app/Controller/StructuralController.php

@@ -87,4 +87,9 @@ public function decorator()
         (new \App\Factory\Structural\DecoratorPattern\ActiveRecord\Application)->run();
     }
 
+    public function proxy()
+    {
+        (new \App\Factory\Structural\ProxyPattern\FileReader\Application)->run();
+    }
+    
 }

app/Factory/Structural/ProxyPattern/FileReader/Application.php

@@ -0,0 +1,12 @@
+<?php namespace App\Factory\Structural\ProxyPattern\FileReader;
+
+class Application
+{
+  public function run()
+  {
+    $file = (new JsonFileReaderProxy(__DIR__ . '/data.json'));
+    echo 'IsFileReadAble: ' . $file->isReadable();
+    echo '<br/>File Size is: ' . $file->getFileSize() . ' KB';
+    echo '<br/>Is File Writable: ' . $file->isWritable();
+  }
+}

app/Factory/Structural/ProxyPattern/FileReader/FileReader.php

@@ -0,0 +1,9 @@
+<?php namespace App\Factory\Structural\ProxyPattern\FileReader;
+
+interface FileReader
+{
+  public function getFileSize(): int;
+  public function isWritable(): bool;
+  public function isReadable(): bool;
+  public function getContent();
+}

app/Factory/Structural/ProxyPattern/FileReader/JsonFileReader.php

@@ -0,0 +1,37 @@
+<?php namespace App\Factory\Structural\ProxyPattern\FileReader;
+
+class JsonFileReader implements FileReader
+{
+  private $_file = null;
+  private $_fileSize = null;
+  private $_isWritable = null;
+  private $_isReadable = null;
+
+  public function __construct(string $path)
+  {
+    $this->_file = \json_decode(\file_get_contents($path));
+    $this->_fileSize = filesize($path);
+    $this->_isWritable = is_writable($path);
+    $this->_isReadable = is_readable($path);
+  }
+
+  public function getContent()
+  {
+    return $this->_file;
+  }
+
+  public function getFileSize(): int
+  {
+    return $this->_fileSize;
+  }
+
+  public function isWritable(): bool
+  {
+    return $this->_isWritable;
+  }
+  
+  public function isReadable(): bool
+  {
+    return $this->_isReadable;
+  }
+}

app/Factory/Structural/ProxyPattern/FileReader/JsonFileReaderProxy.php

@@ -0,0 +1,44 @@
+<?php namespace App\Factory\Structural\ProxyPattern\FileReader;
+
+class JsonFileReaderProxy implements FileReader
+{
+  private $_file = null;
+  private $_path = null;
+
+  public function __construct(string $path)
+  {
+    $this->_file = null;
+    $this->_path = $path;
+  }
+
+  public function getContent()
+  {
+    $this->loadFile();
+    return $this->_file->getContent();
+  }
+
+  public function getFileSize(): int
+  {
+    $this->loadFile();
+    return $this->_file->getFileSize();
+  }
+
+  public function isWritable(): bool
+  {
+    $this->loadFile();
+    return $this->_file->isWritable();
+  }
+  
+  public function isReadable(): bool
+  {
+    $this->loadFile();
+    return $this->_file->isReadable();
+  }
+
+  private function loadFile()
+  {
+    if($this->_file === null) {
+      $this->_file = new JsonFileReader($this->_path);
+    }
+  }
+}

app/Factory/Structural/ProxyPattern/FileReader/data.json

@@ -0,0 +1 @@
+{}

bootstraps/routes.php

@@ -17,6 +17,7 @@
     ['GET', '/structural/bridge', ['App\Controller\StructuralController', 'bridge']],
     ['GET', '/structural/composite', ['App\Controller\StructuralController', 'composite']],
     ['GET', '/structural/decorator', ['App\Controller\StructuralController', 'decorator']],
+    ['GET', '/structural/proxy', ['App\Controller\StructuralController', 'proxy']],
     ['GET', '/behavioral', ['App\Controller\BehavioralController', 'chainOfResponsibility']],
     ['GET', '/behavioral/command', ['App\Controller\BehavioralController', 'command']],
     // ['GET', '/{slug}', ['App\Controller\CreationalController', 'show']],

tests/ProxyPatternTest.php

@@ -0,0 +1,21 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+
+class ProxyPatternTest extends TestCase {
+  private $filePath = __DIR__ . '/../app/Factory/Structural/ProxyPattern/FileReader/data.json';
+
+  public function testCanReadReadableFile()
+  {
+    $fileReader = new App\Factory\Structural\ProxyPattern\FileReader\JsonFileReaderProxy($this->filePath);
+
+    $this->assertTrue($fileReader->isReadable());
+  }
+
+  public function testCanReadFileContent()
+  {
+    $fileReader = new App\Factory\Structural\ProxyPattern\FileReader\JsonFileReaderProxy($this->filePath);
+
+    $this->assertEquals($fileReader->getContent(), new \stdClass);
+  }
+}