<?php
/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2008 Bharat Mediratta
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * $Id: url.php 17853 2008-08-14 22:36:50Z JensT $
 */

/**
 * Functions that provide possibility to create and modify URLS
 *
 * @package     Libs
 * @subpackage  URLs
 */

/**
 * Define Constants for absolute Gallery pathes.
 */
function setGalleryPaths() {
	if (defined('GALLERY_BASE')) {
		return;
	}

	$currentFile = __FILE__;
	if ( $currentFile == '/usr/share/gallery/lib/url.php') {
		/* We assume Gallery runs on as Debian Package */
		define ("GALLERY_CONFDIR", "/etc/gallery");
		define ("GALLERY_SETUPDIR", "/var/lib/gallery/setup");
	}
	else {
		define ("GALLERY_CONFDIR", dirname(dirname(__FILE__)));
		define ("GALLERY_SETUPDIR", dirname(dirname(__FILE__)) . "/setup");
	}

	define ("GALLERY_BASE", dirname(dirname(__FILE__)));
}

/**
 * Return the URL to your Gallery
 *
 * @return string	$base
 */
function getGalleryBaseUrl() {
	global $gallery;

	if (isset($gallery->app) &&
		isset($gallery->app->photoAlbumURL))
	{
		$base = $gallery->app->photoAlbumURL;
	}
	elseif(where_i_am() == 'config') {
		$base = '..';
	}
	elseif (defined('GALLERY_URL')) {
		$base = GALLERY_URL;
	}
	else {
		$base = '.';
	}

	return $base;
}

/**
 * Any URL that you want to use can either be accessed directly
 * in the case of a standalone Gallery, or indirectly if we're
 * mbedded in another app such as Nuke.  makeGalleryUrl() will
 * always create the appropriate URL for you.
 *
 * @param	string	$target	File with a relative path to the gallery base
 *				(eg, "album_permissions.php")
 *
 * @param	array	$args	Optional array containg additional Urlargs.
 *				(eg, array("index" => 1, "set_albumName" => "foo"))
 * @return	string
 */
function makeGalleryUrl($target = '', $args = array()) {
	global $gallery;
	global $GALLERY_EMBEDDED_INSIDE;
	global $GALLERY_EMBEDDED_INSIDE_TYPE;
	global $GALLERY_MODULENAME;
	global $modpath;

	if (empty($GALLERY_MODULENAME) &&
		$GALLERY_EMBEDDED_INSIDE =='nuke' &&
		!empty($modpath))
	{
		$GALLERY_MODULENAME = basename(dirname($modpath));
	}

	/* Needed for postNuke (0.8 and above) */
	global $GALLERY_POSTNUKE_VERSION;

	/* Needed for phpBB2 */
	global $userdata;
	global $board_config;

	/* Needed for Mambo / Joomla! */
	global $MOS_GALLERY_PARAMS;

	/* Needed for CPGNuke */
	global $mainindex;

	$url = '';
	$prefix = '';
	$isSetupUrl = (stristr($target, 'setup')) ? true : false;

	if(isset($gallery->app->photoAlbumURL) && !urlIsRelative($gallery->app->photoAlbumURL)) {
		$gUrl = parse_url($gallery->app->photoAlbumURL);

		if(isset($gUrl['port'])) {
			$urlprefix = $gUrl['scheme'] .'://'. $gUrl['host'] . ':' . $gUrl['port'];
		}
		else {
			$urlprefix = $gUrl['scheme'] .'://'. $gUrl['host'];
		}
	}
	else {
		$urlprefix = '';
	}

	/* make sure the urlprefix doesnt end with a / */
	$urlprefix = ereg_replace("\/$", "", $urlprefix);

	/* Add the folder to the url when *Nuke is not direct in the main folder */
	$addpath = substr($_SERVER['PHP_SELF'], 0, strrpos($_SERVER['PHP_SELF'], '/'));

	if( isset($GALLERY_EMBEDDED_INSIDE) && !$isSetupUrl && where_i_am() != 'config') {
		switch ($GALLERY_EMBEDDED_INSIDE_TYPE) {
			case 'phpBB2':
				$cookiename = $board_config['cookie_name'];
				if(!isset($_COOKIE[$cookiename . '_sid'])) {
					// no cookie so we need to pass the session ID manually.
					$args["sid"] = $userdata['session_id'];
					if(!isset($args["set_albumName"])) {
						// This var is only passed some of the time and but is required so PUT IT IN when needed.
						$args["set_albumName"] = $gallery->session->albumName;
					}
				}

			case 'phpnuke':
			case 'nsnnuke':
				$args["op"] = "modload";
				$args["name"] = $GALLERY_MODULENAME;
				$args["file"] = "index";

				/*
				 * include *must* be last so that the JavaScript code in
				 * view_album.php can append a filename to the resulting URL.
				 */
				$args["include"] = $target;
				$url = $urlprefix . $addpath .'/modules.php';
			break;

			case 'cpgnuke':
				$args["name"] = "$GALLERY_MODULENAME";
				$args["file"] = "index";

				/*
				 * include *must* be last so that the JavaScript code in
				 * view_album.php can append a filename to the resulting URL.
				 */
				$args["include"] = $target;
				$url = $urlprefix . $addpath . "/$mainindex";
			break;

			case 'postnuke':
				if (substr($GALLERY_POSTNUKE_VERSION, 0, 7) < "0.7.6.0") {
					$args["op"] = "modload";
					$args["file"] = "index";

					$url = $urlprefix . $addpath . '/modules.php';
				}
				else {
					$url = $urlprefix . pnGetBaseURI()."/index.php";
				}

				$args["name"] = $GALLERY_MODULENAME;
				/*
				 * include *must* be last so that the JavaScript code in
				 * view_album.php can append a filename to the resulting URL.
				 */
				$args["include"] = $target;
			break;

			case 'zikula':
				$url = $urlprefix . pnGetBaseURI()."/index.php";

				$args["name"] = $GALLERY_MODULENAME;
				/*
				 * include *must* be last so that the JavaScript code in
				 * view_album.php can append a filename to the resulting URL.
				 */
				$args["include"] = $target;

			break;

			case 'mambo':
			case 'joomla':
				$args['option'] = $GALLERY_MODULENAME;
				$args['Itemid'] = $MOS_GALLERY_PARAMS['itemid'];
				$args['include'] = $target;

				/* We cant/wantTo load the complete Mambo / Joomla! Environment into the pop up
				** E.g. the Upload Framwork does not work then
				** So we need to put necessary infos of Mambo / Joomla! into session.
				*/
				if ((isset($args['type']) && $args['type'] == 'popup') ||
					(!empty($args['gallery_popup']))) {
					$target = 'index.php';
				}
				else {
					if (!empty($gallery->session->mambo->mosRoot)) {
						$url = $urlprefix . $gallery->session->mambo->mosRoot . 'index.php';
					}
					else {
						$url = 'index.php';
					}
				}
			break;

			// Maybe something went wrong, we do nothing as URL we be build later.
			default:
			break;
		}
	}

	if (empty($url)) {
		$url = getGalleryBaseUrl() ."/$target";
	}

	if ($args) {
		$i = 0;
		foreach ($args as $key => $value) {
			if ($i++) {
				$url .= "&";  // should replace with &amp; for validatation
			}
			else {
				$url .= "?";
			}

			if (! is_array($value)) {
				$url .= "$key=$value";
			}
			else {
				$j = 0;
				foreach ($value as $subkey => $subvalue) {
					if ($j++) {
						$url .= "&";  // should replace with &amp; for validatation
					}
					$url .= $key .'[' . $subkey . ']=' . $subvalue;
				}
			}
		}
	}
	return htmlspecialchars($url);
}
/**
 * A wrapper around makeGalleryUrl that returns the url with decoded htmlentities
 *
 * @param string	$target
 * @param array		$args
 * @return string
 */
function makeGalleryHeaderUrl($target = '', $args = array()) {
	$url = makeGalleryUrl($target, $args);

	return unhtmlentities($url);
}

/**
 * makeAlbumUrl is a wrapper around makeGalleryUrl.  You tell it what
 * album (and optional photo id) and it does the rest.  You can also
 * specify additional key/value pairs in the optional third argument.
*/
function makeAlbumUrl($albumName = '', $photoId = '', $args = array()) {
	global $GALLERY_EMBEDDED_INSIDE, $GALLERY_EMBEDDED_INSIDE_TYPE;
	global $gallery;

	// We can use GeekLog with rewrite because Gallery is embedded in a different way.
	if ( $gallery->app->feature["rewrite"] == 1 &&
		(! $GALLERY_EMBEDDED_INSIDE || $GALLERY_EMBEDDED_INSIDE_TYPE == 'GeekLog')) {
		if ($albumName) {
			$target = urlencode($albumName);

			// Can't have photo without album
			if ($photoId) {
				$target .= '/'. urlencode($photoId);
			}
		} else {
			$target = "albums.php";
		}
	} else {
		if ($albumName) {
			$args["set_albumName"] = urlencode ($albumName);
			if ($photoId) {
				$target = "view_photo.php";
				$args['id'] = urlencode($photoId);
			} else {
				$target = "view_album.php";
			}
		} else {
			$target = "albums.php";
		}
	}
	return makeGalleryUrl($target, $args);
}

function makeAlbumHeaderUrl($albumName="", $photoId="", $args=array()) {
	$url = makeAlbumUrl($albumName, $photoId, $args);
	return unhtmlentities($url);
}

function addUrlArg($url, $arg) {
	if (strstr ($url, "?")) {
		return "$url&$arg";
	}
	else {
		return "$url?$arg";
	}
}

/**
 * @param	string	$name		Name of Image
 * @param	string	$skinname	Optional Name skin, if file is not found, fallback to default location
 * @return	string	$retUrl		Complete URL to the Image
 */
function getImagePath($name, $skinname = '') {
	global $gallery;
	$retUrl = '';

	if (!$skinname) {
		$skinname = $gallery->app->skinname;
	}

	/* We cant use makeGalleryUrl() here, as Gallery could be embedded. */
	$base		= getGalleryBaseUrl();
	$defaultname	= dirname(dirname(__FILE__)) . "/images/$name";
	$fullname	= dirname(dirname(__FILE__)) . "/skins/$skinname/images/$name";

	$defaultURL	= "$base/images/$name";
	$fullURL	= "$base/skins/$skinname/images/$name";

	if (fs_file_exists($fullname) && !broken_link($fullname)) {
		$retUrl = $fullURL;
	}
	elseif (fs_file_exists($defaultname) && !broken_link($defaultname)) {
		$retUrl = $defaultURL;
	}

	return $retUrl;
}

/**
 * @param	string	$name		Name of Image
 * @param	string	$skinname	Optional Name skin, if file is not found, fallback to default location
 * @return	string	$retPath	Complete Path to the Image
 * @author	Jens Tkotz
 */
function getAbsoluteImagePath($name, $skinname = '') {
	global $gallery;
	$retPath = '';

	$base = dirname(dirname(__FILE__));

	$defaultPath = "$base/images/$name";

	/* Skin maybe 'none', but this is never found, so we fall back to default. */
	if (!$skinname) {
		$skinname = $gallery->app->skinname;
	}
	$skinPath = "$base/skins/$skinname/images/$name";

	if (fs_file_exists($skinPath)) {
		$retPath = $skinPath;
	} else {
		$retPath = $defaultPath;
	}

	return $retPath;
}

/**
 * Checks whether an URL is relative or not
 * @param	string	$url
 * @return	boolean
 * @author	Jens Tkotz
 */
function urlIsRelative($url) {
	if (substr($url, 0,7) == 'http://') {
		return false;
	}
	elseif(substr($url, 0,6) == 'ftp://') {
		return false;
	}
	else {
		return true;
	}
}

/**
 * Checks whether a path looks absolute. Means: starting with a /
 *
 * @param string	$path
 * @return boolean
 * @author Jens Tkotz
 */
function pathIsAbsolute($path) {
	if($path{0} == '/' && $path{1} != '/') {
		return true;
	}
	else {
		return false;
	}
}

function broken_link($file) {
	if (fs_is_link($file)) {
		return !fs_is_file($file);
	}
	else {
		return false;
	}
}

function galleryLink($url = '', $text ='', $attrList = array(), $icon = '', $addBrackets = false) {
	global $gallery;

	$html = '';
	$altText = $text;

	if (!empty($attrList['altText'])) {
		$altText = $attrList['altText'];
		unset($attrList['altText']);
	}

	$attrs = generateAttrs($attrList);

	if(!empty($icon)) {
		$content = getIconText($icon, $text, '', $addBrackets, $altText);
	}
	else {
		if($addBrackets) {
			$content = '['. $text .']';
		}
		else {
			$content = $text;
		}
	}

	if (!empty($url)) {
		$html .= "<a href=\"$url\"$attrs>$content</a>\n";
	}
	elseif (! empty($attrs)) {
		$html .= "<a$attrs>$content</a>\n";
	}
	else {
		$html = $content;
	}

	return $html;
}

function galleryIconLink($url, $icon, $text, $iconMode = '', $attrList = array()) {
	global $gallery;

	$html		= '';
	$altText	= '';

	$iconMode = !empty($iconMode) ? $iconMode : $gallery->app->useIcons;

	if($iconMode == 'yes') {
		$altText = $text;
	}

	$addBrackets = ($iconMode == 'no') ? true : false;

	$content = getIconText($icon, $text, $iconMode, $addBrackets, $altText, true);

	$attrs = generateAttrs($attrList);

	if (!empty($url)) {
		$html .= "<a href=\"$url\"$attrs>$content</a>";
	}
	else {
		$html .= "<a$attrs>$content</a>";
	}

	return $html;
}

?>