<?php
class TemplateManifest
{
  const FILENAME   = "manifest.yml";
  const TEMPLATES  = "invoice,budget";
  const SCREENSHOT = 'screenshot.png';
  
  protected
    $compiled,
    $name,
    $version,
    $author,
    $email,
    $homepage,
    $directory,
    $screenshot;
  
  public function __construct($directory)
  {
    $directory = realpath($directory).DIRECTORY_SEPARATOR;
    
    if (!file_exists($manifest = $directory.self::FILENAME))
    {
      throw new sfException("Manifest file could not be found.");
    }
    
    $manifest = sfYaml::load($manifest);
    
    foreach (get_class_vars(__CLASS__) as $attribute => $value)
    {
      if (isset($manifest[$attribute]))
      {
        $this->$attribute = $manifest[$attribute];
      }
    }
    
    if (file_exists($directory.self::SCREENSHOT))
    {
      $this->screenshot = true;
    }
    
    if (!$this->name)
    {
      throw new sfException("Template name was not set and it is mandatory.");
    }
    
    $this->directory = $this->generateDirectoryName();
  }
  
  public function getName()
  {
    return $this->name;
  }
  
  public function getVersion()
  {
    return $this->version;
  }
  
  public function getAuthor()
  {
    return $this->author;
  }
  
  public function getEmail()
  {
    return $this->email;
  }
  
  public function getHomepage()
  {
    return $this->homepage;
  }
  
  public function getDirectoryName()
  {
    return $this->directory;
  }
  
  public function hasScreenshot()
  {
    return $this->screenshot;
  }
  
  public function isCompiled()
  {
    return (bool) $this->compiled;
  }
  
  public function setCompiled($value)
  {
    $this->compiled = (bool) $value;
  }
  
  /**
   * Transforms manifest.name into an underscored and filtered directory name
   * @return string
   * @author Carlos <carlos@markhaus.com>
   */
  protected function generateDirectoryName()
  {
    $old = ini_get('mbstring.substitute_character');
    ini_set('mbstring.substitute_character', "none");
    $name = preg_replace('/\s+/', '-', strtolower(filter_var(mb_convert_encoding($this->name, 'ASCII'), FILTER_SANITIZE_STRING)));
    ini_set('mbstring.substitute_character', $old);
    return $name;
  }
  
  /**
   * Returns valid template names as an array
   * @return array
   * @author Carlos Escribano <carlos@markhaus.com>
   **/
  public static function getTemplateNames()
  {
    return explode(',', self::TEMPLATES);
  }
  
  protected function toArray()
  {
    $res = array();
    foreach (get_object_vars($this) as $attribute => $value)
    {
      $res[$attribute] = $value;
    }
    return $res;
  }
  
  public function dump()
  {
    return sfYaml::dump($this->toArray());
  }
}