<?php defined('BLUDIT') or die('Bludit CMS.');

class Url
{
	private $uri;
	private $uriStrlen;
	private $whereAmI;
	private $slug;
	private $filters; // Filters for the URI
	private $notFound;

	function __construct()
	{
		// Decodes any %## encoding in the given string. Plus symbols ('+') are decoded to a space character.
		$this->uri = urldecode($_SERVER['REQUEST_URI']);

		// URI Lowercase
		//$this->uri = helperText::lowercase($this->uri);

		$this->uriStrlen = helperText::length($this->uri);

		$this->whereAmI = 'home';

		$this->notFound = false;

		$this->slug = false;

		$this->filters = array();
	}

	// Filters may be changed for different languages
	// Ex (Spanish): Array('post'=>'/publicacion/', 'tag'=>'/etiqueta/', ....)
	// Ex (English): Array('post'=>'/post/', 'tag'=>'/tag/', ....)
	public function checkFilters($filters)
	{
		// Get the admin filter
		$adminFilter['admin'] = $filters['admin'];
		unset($filters['admin']);
		
		// Sort by filter length
		uasort($filters, array($this, 'sortByLength'));

		// Push the admin filter first
		$filters = $adminFilter + $filters;

		$this->filters = $filters;

		foreach($filters as $filterKey=>$filter)
		{
			$slug = $this->getSlugAfterFilter($filter);
			if($slug!==false)
			{
				if(empty($slug))
				{
					if($filter==='/')
					{
						$this->whereAmI = 'home';
						break;
					}

					$this->setNotFound(true);
				}

				$this->whereAmI = $filterKey;
				break;
			}
		}
	}

	public function slug()
	{
		return $this->slug;
	}

	public function uri()
	{
		return $this->uri;
	}

	// Return the filter used
	public function filters($type)
	{
		return $this->filters[$type];
	}

	// Return: home, tag, post
	public function whereAmI()
	{
		return $this->whereAmI;
	}

	public function setWhereAmI($where)
	{
		$this->whereAmI = $where;
	}

	public function notFound()
	{
		return $this->notFound;
	}

	public function setNotFound($error = true)
	{
		$this->notFound = $error;
	}

/*
	public function is_tag($filter)
	{
		$slug = $this->getSlugAfterFilter($filter);

		// Check if the filter doesn't match in the uri.
		if($slug===false)
			return false;

		// Check if the slug is empty.
		if(empty($slug))
			$this->setNotFound(true);

		return true;
	}

	public function is_post($filter)
	{
		$slug = $this->getSlugAfterFilter($filter);

		// Check if the filter doesn't match in the uri.
		if($slug===false)
			return false;

		// Check if the slug is empty.
		if(empty($slug))
			$this->setNotFound(true);

		$this->whereAmI = 'post';

		return true;
	}

	public function is_page($filter)
	{
		$slug = $this->getSlugAfterFilter($filter);

		// Check if the filter doesn't match in the uri.
		if($slug===false)
			return false;

		// Check if the slug is empty.
		if(empty($slug))
			$this->setNotFound(true);

		$this->whereAmI = 'page';

		return true;
	}

	public function isAdmin($filter)
	{
		$slug = $this->getSlugAfterFilter($filter);

		// Check if the filter doesn't match in the uri.
		if($slug===false)
			return false;

		// Check if the slug is empty.
		if(empty($slug))
			$this->setNotFound(true);

		$this->whereAmI = 'admin';

		return true;
	}
*/

	// Return the slug after the $filter
	// If the filter is not contain in the uri, returns FALSE
	// If the filter is contain in the uri and the slug is not empty, returns the slug
	// ex: http://domain.com/cms/$filter/slug123 => slug123
	private function getSlugAfterFilter($filter)
	{
		if($filter=='/')
			$filter = HTML_PATH_ROOT;

		// Check if the filter is in the uri.
		$position = helperText::strpos($this->uri, $filter);
		if($position===false)
			return false;

		$start = $position + helperText::length($filter);
		$end = $this->uriStrlen;

		$slug = helperText::cut($this->uri, $start, $end);
		$this->slug = trim($slug);

		return $slug;
	}

	private function sortByLength($a, $b)
	{
		return strlen($b)-strlen($a);
	}

}