<?php
/**
 * SVG Path class
 *
 * @author     Nicolas Perriault <nperriault@gmail.com>
 * @package    cleversvg
 * @subpackage elements
 */
class csPath extends csBaseShape
{

  protected
    $xml_node_name = 'path',
    $path_array    = array();

  /**
   * Class constructor
   *
   */
  public function __construct($path_data = array(), $attrs = array())
  {
    $this->setPathDataArray($path_data);
    $this->setFill('none');
    $this->attributes = array_merge($attrs, $this->attributes);
  }

  /**
   * Compute current path data array
   *
   */
  protected function computePath()
  {
    $path_string = '';
    foreach ($this->path_data_array as $move)
    {
      if (isset($move[1]))
      {
        $path_string .= sprintf('%s %s',
                                $move[0],
                                implode(' ', $move[1]));
      }
      else
      {
        $path_string .= $move[0];
      }
    }
    $this->setPathDataString(trim($path_string));
  }

  /**
   * Sets the path data from an array
   *
   * @param  array
   */
  public function setPathDataArray($path_data_array)
  {
    $this->path_data_array = $path_data_array;
    $this->computePath();
  }

  /**
   * Sets the path string
   *
   * @param  string
   */
  public function setPathDataString($path_data_string)
  {
    $last_char = substr($path_data_string, strlen($path_data_string)-1, 1);
    if (!strtolower($last_char) === 'z')
    {
      $path_data_string .= ' z';
    }
    $this->setAttribute('d', $path_data_string);
  }

  /**
   * Init path data array and ready to receive path building directions
   *
   */
  public function begin()
  {
    $this->path_data_array = array();
  }

  public function end()
  {
    $this->path_data_array[] = array('Z');
    $this->computePath();
  }

  /**
   * Move to a point
   *
   * @param  int  $x
   * @param  int  $y
   */
  public function moveTo($x, $y)
  {
    $this->path_data_array[] = array('M', array($x, $y));
  }

  /**
   * Draws a line moving to a point
   *
   * @param  int  $x
   * @param  int  $y
   */
  public function lineTo($x, $y)
  {
    $this->path_data_array[] = array('L', array($x, $y));
  }

  /**
   * Draws a horizontal line moving to a point
   *
   * @param  int  $x
   */
  public function hLineTo($x)
  {
    $this->path_data_array[] = array('H', array($x));
  }

  /**
   * Draws a vertical line moving to a point
   *
   * @param  int  $y
   */
  public function vLineTo($y)
  {
    $this->path_data_array[] = array('V', array($y));
  }

  /**
   * Draws a curve moving to a point
   *
   */
  public function curveTo($x, $y, $x1, $y1, $x2, $y2)
  {
    $this->path_data_array[] = array('C', array($x, $y, $x1, $y1, $x2, $y2));
  }

  /**
   * Draws a smooth curve moving to a point
   *
   */
  public function smoothCurveTo($x, $y, $x2, $y2)
  {
    $this->path_data_array[] = array('S', array($x, $y, $x2, $y2));
  }

  /**
   * The x-axis coordinate of one corner of the rectangular region into which an
   * embedded 'svg' element is placed.
   *
   * @param  int
   */
  public function setX($x)
  {
    $this->setAttribute('x', $x);
  }

  /**
   * The y-axis coordinate of one corner of the rectangular region into which an
   * embedded 'svg' element is placed.
   *
   * @param  int
   */
  public function setY($y)
  {
    $this->setAttribute('y', $y);
  }


}