<?php

class Tile {

  /** Defines a Tile from a panorama

   */

    private $point;

    private $zoom;

    public $x;

    public $y;

    public function __construct($site_point, $zoom, $x, $y) {

        $this->point = $site_point;

        $this->zoom = $zoom;

        $this->x = $x;

        $this->y = $y;

    }

    public function path() {

        return sprintf('%s/%03d_%03d_%03d.jpg', $this->point->tiles_path(),

                       $this->zoom, $this->x, $this->y);

    }

    /** Returns tile size (x,y)

     */

    public function dimensions() {

        return getimagesize($this->path());

    }

    public static function from_file($file_path, $site_point) {

        preg_match('/([0-9]+)_([0-9]+)_([0-9]+)\.jpg$/', $file_path, $groups);

        $zoom = (int)($groups[1]);

                $x = (int)($groups[2]);

                $y = (int)($groups[3]);

        return new Tile($site_point, $zoom, $x, $y);

    }

  };

?>