DAR-24: unsubscription

application/classes/Controller/Letter.php

@@ -78,4 +78,30 @@ class Controller_Letter extends Controller_Layout {
     $this->template->subject = $model->subject;
     $this->template->id = $model->id;
   }
+
+  public function action_unsubscribe()
+  {
+    $id = $this->request->param('id');
+    $letter = ORM::factory('Letter', $id);
+    $token = $this->request->query('token');
+    $email = $this->request->query('email');
+    if (!$letter->loaded() || empty($token) || empty($email))
+    {
+      $this->redirect('error/500');
+    }
+    $client = ORM::factory('Client')->where('email', '=', $email)->and_where('token', '=', $token)->find();
+    $course = ORM::factory('Course', $letter->course_id);
+    if (!$client->loaded() || !$course->loaded())
+    {
+      Session::instance()->set_once('flash_error', __('Client not found. Possible subscription token problem.'));
+      $this->redirect('error/403');
+    }
+    // token is valid, client is found, letter is found - we can unsubscribe him now
+    $course->remove('clients', $client);
+    Log::instance()->add(Log::NOTICE, 'Client '.$client->name.' has been unsubscribed from course '.$course->title);
+    Model_Task::cancel($client->id, $course->id);
+    $this->template = new View_Message;
+    $this->template->message = __('You have been successfully unsubscribed from course %s', array('%s' => $course->title));
+  }
+
 }

application/classes/Model/Course.php

@@ -8,7 +8,7 @@
  **/
 class Model_Course extends ORM {
   protected $_has_many = array(
-    'client' => array(
+    'clients' => array(
       'model' => 'Client',
       'through' => 'clients_courses'
     ),

application/classes/Model/Letter.php

@@ -74,6 +74,7 @@ class Model_Letter extends ORM {
     $template->id = $id;
     $template->subject = $subject;
     $template->token = $token;
+    $template->address = $address;
     $renderer = Kostache_Layout::factory($template->_layout);
     $html = $renderer->render($template, $template->_view);
     $email = Email::factory($subject, $html, 'text/html')->from($sender[0], $sender[1]);

application/classes/Model/Task.php

@@ -10,6 +10,7 @@ class Model_Task extends ORM {
   const STATUS_PENDING = 1;
   const STATUS_SENDING = 2;
   const STATUS_SENT = 3;
+  const STATUS_CANCELED = 4;
 
   protected $_has_many = array(
     'letter' => array(
@@ -161,4 +162,17 @@ class Model_Task extends ORM {
       return TRUE;
     return FALSE;
   }
+
+  /**
+   * Cancel tasks for specified client. If a course ID parameter is present, cancel only tasks for this course.
+   **/
+  public static function cancel($client_id, $course_id = 0)
+  {
+    $query = DB::update('tasks')->set(array('status' => self::STATUS_CANCELED))->where('client_id', '=', $client_id);
+    if ($course_id > 0)
+    {
+      $query->and_where('letter_id', 'IN', Model_Course::get_letter_ids($course_id));
+    }
+    return $query->execute();
+  }
 }

application/classes/View/Letter/View.php

@@ -6,8 +6,22 @@
 class View_Letter_View extends View {
   public $_view = NULL;
   public $_layout = 'email';
+
+  /**
+   * Unsubscription token
+   **/
   public $token = '';
+  /**
+   * Email receiver address
+   **/
+  public $address = '';
+  /**
+   * Email subject
+   **/
   public $subject = '';
+  /**
+   * Letter ID
+   **/
   public $id = NULL;
   public $scripts = array();
   
@@ -20,4 +34,20 @@ class View_Letter_View extends View {
   {
     return Kostache::factory()->render($this->content);
   }
+  
+  public function unsubscribe()
+  {
+    return self::unsubscribe_link($this->id, $this->address, $this->token);
+  }
+  
+  public static function unsubscribe_link($id, $address, $token)
+  {
+    return HTML::anchor(
+      Route::url('default', array('controller' => 'Letter', 'action' => 'unsubscribe', 'id' => $id), TRUE).'?'.http_build_query(array(
+        'email' => $address,
+        'token' => $token
+      )),
+      __('Tired of receiving these emails? Click this link to unsubscribe.')
+    );
+  }
 }

application/i18n/ru.php

@@ -70,5 +70,8 @@ return array(
   'From now on you will receive letters from this subscription.' => 'Теперь вы будете получать письма из этой рассылки.',
   'Problems viewing this email? Click here.' => 'Проблемы с отображением письма? Нажмите сюда.',
   'What is your name?' => 'Как вас зовут?',
-  'Your e-mail' => 'Ваш адрес электронной почты'
+  'Your e-mail' => 'Ваш адрес электронной почты',
+  'Tired of receiving these emails? Click this link to unsubscribe.' => 'Устали получать эти письма? Нажмите на эту ссылку для отписки.',
+  'Client not found. Possible subscription token problem.' => 'Клиент не найден. Возможна проблема с токеном подписки.',
+  'You have been successfully unsubscribed from course %s' => 'Вы были успешно отписаны от курса %s'
 );

application/templates/email.mustache

@@ -12,6 +12,9 @@
       <div class="row">
 {{>content}}
       </div>
+      <div class="row">
+        <div style="font-size: 10px; margin-bottom: 10px">{{{unsubscribe}}}</div>
+      </div>
     </div>
   </body>
 </html>