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Path: /data/applications/aps/gallery/2.3-2/standard/htdocs/modules/slideshow/classes/ [ Home ]
File: PicLensHelper.class
<?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.
 */

/**
 * Helper class for downloading PicLens code.
 *
 * @package Slideshow
 * @subpackage Classes
 * @author Bharat Mediratta <bharat@menalto.com>
 * @version $Revision: 17580 $
 */
class PicLensHelper {

    /**
     * Download the latest Javascript and Shockwave code from the PicLens site.
     * @return array object GalleryStatus a status code
     *               string the version of PicLens we just installed
     * @static
     */
    function install() {
	global $gallery;
	$platform =& $gallery->getPlatform();

	$info = PicLensHelper::getLatestPicLensInfo();
	if (empty($info)) {
	    return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE), null);
	}

	if (empty($info['version']) || empty($info['jsUrl']) || empty($info['swfUrl'])) {
	    return array(GalleryCoreApi::error(ERROR_MISSING_VALUE), null);
	}

	$codeDir = $gallery->getConfig('data.gallery.plugins_data') . 'modules/slideshow/';
	$jsPath = "${codeDir}piclens.js";
	$swfPath = "${codeDir}PicLensLite.swf";
	list($success1) = GalleryCoreApi::fetchWebFile($info['jsUrl'], "$jsPath.new");
	list($success2) = GalleryCoreApi::fetchWebFile($info['swfUrl'], "$swfPath.new");
	if ($success1 && $success2) {
	    if (!$platform->rename("$jsPath.new", $jsPath)
		    || !$platform->rename("$swfPath.new", $swfPath)) {
		return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE), null);
	    }
	} else {
	    foreach (array($jsPath, $swfPath) as $path) {
		if ($platform->file_exists("$path.new")) {
		    $platform->unlink("$path.new");
		}
	    }
	    return array(GalleryCoreApi::error(ERROR_PLATFORM_FAILURE), null);
	}

	return array(null, $info['version']);
    }

    /**
     * Get information about the latest version of the PicLens code.
     *
     * @return array('version' => version number,
     *               'jsUrl' => url to the JS file,
     *               'swfUrl' => url to the SWF file)
     * @static
     */
    function getLatestPicLensInfo() {
	$url = 'http://gallery.menalto.com/versioncheck/piclens/release';
	list ($success, $body) = GalleryCoreApi::fetchWebPage($url);
	if (!$success) {
	    return null;
	}

	$info = array();
	foreach (explode("\n", $body) as $line) {
	    $pair = explode("=", $line, 2);
	    GalleryUtilities::sanitizeInputValues($pair);
	    if (count($pair) == 2) {
		$info[$pair[0]] = $pair[1];
	    }
	}

	return $info;
    }

    /**
     * Remove PicLens.
     */
    function uninstall() {
	global $gallery;
	$platform =& $gallery->getPlatform();

	$codeDir = $gallery->getConfig('data.gallery.plugins_data') . 'modules/slideshow/';
	foreach (array('piclens.js', 'PicLensLite.swf') as $file) {
	    $path = "{$codeDir}$file";
	    if ($platform->file_exists($path)) {
		@$platform->unlink($path);
	    }
	}
    }
}
?>