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<?php
class Template
{
  //
  // private variables
  //
  private $assigns = array();   // saves the added arrays/strings
  private $file = array();   // saves the added file
  private $root;  // saves the root directory of the templates dir
  
  /**
  *
  * Constructor and method to set the templates root dir
  *
  * @access puplic
  * @param strin $dir
  * @return true/false
  *
  **/
  function Template($dir = '.')
  {
    if (!dir($dir))
    {
      die("Template->Template(): Can´t set any root dir for $dir");
    }
    $this->root = $dir;
    return true;
  }
  
  /**
  *
  * function to set handle and file for display
  *
  * @access puplic
  * @param string $handle
  * @param string $tpl_file
  * @return true
  *
  **/
  function set_filename($handle, $tpl_file)
  {
    if (empty($handle))
    {
      die('Template->set_filename(): Can´t set a filename for an empty handle');
    }
    if (empty($tpl_file))
    {
      die("Template->set_filename(): Can´t set an empty file for $handle");
    }
    if (!file_exists($tpl_root . $tpl_file))
    {
      die("Template->set_filename(): File $file doesn´t exists in $tpl_root$tpl_file");
    }
    $this->file[$handle] = $tpl_file;
    return true;
  }  
  
  /**
  *
  * function to assign normaly key´s and values
  *
  * @access puplic
  * @param string $key
  * @param string $value
  * @return true
  *
  **/
  function assign($key, $value)
  {
    if (empty($key))
    {
      die('Template->assign(): Can´t add an empty Key');
    }
    if (empty($value))
    {
      die("Template->assign(): Can´t add an empty Value for Key: $key");
    }
    $this->assigns[$key] = $value;  // adds key and value
    return true;
  }
  
  /**
  *
  * function to assign arrays
  *
  * @access puplic
  * @param array $vars_array
  * @return true
  *
  **/
  function assign_vars($vars_array)
  {
    if (!is_array($vars_array) OR is_object($vars_array))
    {
      die('Template->assign_vars(): You have to add an array');
    }
    while (list($key, $value) = each($vars_array))
    {
      $this->assigns[$key] = $value;  // adds key and value
    }
    return true;
  }
  
  /**
  *
  * function to compile and display the template which was assigns by set_filename
  *
  * @access puplic
  * @param string $handle
  * @return string $code
  *
  **/
  function display($handle)
  {
    if (empty($handle))
    {
      die('Template->display(): Can´t display an empty handle');
    }
    if (!in_array($handle, $this->file))
    {
      die("Template->display(): You have to add this handle($handle) in the method: set_filename");
    }
    $code = file($this->root . $this->file[$handle]);
    $code = implode('', $code);
    
    $code = str_replace('\\', '\\\\', $code);
    $code = str_replace('\'', '\\\'', $code);
    
    $code_lines = explode("\n", $code);
    
    $line_count = sizeof($code_lines);
    
    for ($i = 0; $i < $line_count; $i++)
    {
      if (preg_match('#\{([a-z0-9\-_])\}#is', $code_lines[$i], $m))
      {
        $code = str_replace("{$m[1]}", $this->assigns[$m[1]], $code);
      }
    }
    echo $code;
    return true;
  }
}
?>