add iterator pattern

Author: basherr

app/Controller/BehavioralController.php

@@ -20,4 +20,10 @@ public function command()
 
     $queue->work();
   }
+
+
+  public function iterator()
+  {
+    (new \App\Factory\Behavioral\Iterator\UserRoles\Application)->run();
+  }
 }

app/Factory/Behavioral/Iterator/UserRoles/Application.php

@@ -0,0 +1,25 @@
+<?php namespace App\Factory\Behavioral\Iterator\UserRoles;
+
+class Application
+{
+  const ADMIN = 'admin';
+  const MANAGER = 'manager';
+  
+  public function run()
+  {
+    $basheer = new User('Basheer', new Role(self::ADMIN));
+    $shaheer = new User('Shaheer', new Role(self::MANAGER));
+    
+    $admin = new UserRole($basheer);
+
+    $shaher = new UserRole($shaheer);
+    $ali = new UserRole(new User('ALI', new Role(self::MANAGER)));
+
+    $admin->addUserRole($shaher);
+    $admin->addUserRole($ali);
+
+    foreach($admin as $user) {
+      echo 'Name: ' . $user->getName() . ' Role: ' . $user->getRole() . '<br/>';
+    }
+  }
+}

app/Factory/Behavioral/Iterator/UserRoles/Role.php

@@ -0,0 +1,11 @@
+<?php namespace App\Factory\Behavioral\Iterator\UserRoles;
+
+class Role
+{
+  public $name;
+
+  public function __construct(string $name)
+  {
+    $this->name = $name;
+  }
+}

app/Factory/Behavioral/Iterator/UserRoles/RoleIterator.php

@@ -0,0 +1,50 @@
+<?php namespace App\Factory\Behavioral\Iterator\UserRoles;
+
+class RoleIterator implements \Iterator, \Countable
+{
+  private $users = [];
+  private $counter = 0;
+
+  public function __construct(UserRole $userRole)
+  {
+    $this->addUserRole($userRole);
+    $this->counter = 0;
+  }
+
+  public function addUserRole(UserRole $userRole): void
+  {
+    foreach($userRole->getUsers() as $user) {
+      $this->users[] = $user;
+    }
+  }
+
+  public function current(): UserRole
+  {
+    return $this->users[$this->counter];
+  }
+
+  public function next(): void
+  {
+    $this->counter++;
+  }
+
+  public function rewind(): void
+  {
+    $this->counter = 0;
+  }
+
+  public function valid(): bool
+  {
+    return isset($this->users[$this->counter]);
+  }
+
+  public function key(): int
+  {
+    return $this->counter;
+  }
+
+  public function count(): int
+  {
+    return count($this->users);
+  }
+}

app/Factory/Behavioral/Iterator/UserRoles/User.php

@@ -0,0 +1,13 @@
+<?php namespace App\Factory\Behavioral\Iterator\UserRoles;
+
+class User
+{
+  public $name;
+  public $role;
+
+  public function __construct(string $name, Role $role)
+  {
+    $this->name = $name;
+    $this->role = $role;
+  }
+}

app/Factory/Behavioral/Iterator/UserRoles/UserRole.php

@@ -0,0 +1,44 @@
+<?php namespace App\Factory\Behavioral\Iterator\UserRoles;
+
+class UserRole implements \Countable, \IteratorAggregate
+{
+  private $user;
+  private $storage;
+
+  public function __construct(User $user)
+  {
+    $this->storage = new \SplObjectStorage();
+    $this->user = $user;
+  }
+
+  public function addUserRole(UserRole $userRole)
+  {
+    $this->storage->attach($userRole);
+  }
+
+
+  public function getUsers(): \SplObjectStorage
+  {
+    return $this->storage;
+  }
+
+  public function getIterator(): RoleIterator
+  {
+    return new RoleIterator($this);
+  }
+
+  public function count(): int
+  {
+    return count(new RoleIterator($this));
+  }
+
+  public function getName(): string
+  {
+    return $this->user->name;
+  }
+
+  public function getRole()
+  {
+    return $this->user->role->name;
+  }
+}

bootstraps/routes.php

@@ -20,5 +20,6 @@
     ['GET', '/structural/proxy', ['App\Controller\StructuralController', 'proxy']],
     ['GET', '/behavioral', ['App\Controller\BehavioralController', 'chainOfResponsibility']],
     ['GET', '/behavioral/command', ['App\Controller\BehavioralController', 'command']],
+    ['GET', '/behavioral/iterator', ['App\Controller\BehavioralController', 'iterator']],
     // ['GET', '/{slug}', ['App\Controller\CreationalController', 'show']],
 ];