define(["appSettings","pluginManager"],function(appSettings,pluginManager){"use strict";function packageManager(){function addPackage(pkg){packages=packages.filter(function(p){return p.name!==pkg.name}),packages.push(pkg)}function removeUrl(url){var manifestUrls=JSON.parse(appSettings.get(settingsKey)||"[]");manifestUrls=manifestUrls.filter(function(i){return i!==url}),appSettings.set(settingsKey,JSON.stringify(manifestUrls))}function loadPackage(url,throwError){return new Promise(function(resolve,reject){var xhr=new XMLHttpRequest,originalUrl=url;url+=url.indexOf("?")===-1?"?":"&",url+="t="+(new Date).getTime(),xhr.open("GET",url,!0);var onError=function(){throwError===!0?reject():(removeUrl(originalUrl),resolve())};xhr.onload=function(e){if(this.status<400){var pkg=JSON.parse(this.response);pkg.url=originalUrl,addPackage(pkg);var plugins=pkg.plugins||[];pkg.plugin&&plugins.push(pkg.plugin);var promises=plugins.map(function(pluginUrl){return pluginManager.loadPlugin(self.mapPath(pkg,pluginUrl))});Promise.all(promises).then(resolve,resolve)}else onError()},xhr.onerror=onError,xhr.send()})}var self=this,settingsKey="installedpackages1",packages=[];self.packages=function(){return packages.slice(0)},self.install=function(url){return loadPackage(url,!0).then(function(pkg){var manifestUrls=JSON.parse(appSettings.get(settingsKey)||"[]");return manifestUrls.indexOf(url)===-1&&(manifestUrls.push(url),appSettings.set(settingsKey,JSON.stringify(manifestUrls))),pkg})},self.uninstall=function(name){var pkg=packages.filter(function(p){return p.name===name})[0];return pkg&&(packages=packages.filter(function(p){return p.name!==name}),removeUrl(pkg.url)),Promise.resolve()},self.init=function(){var manifestUrls=JSON.parse(appSettings.get(settingsKey)||"[]");return Promise.all(manifestUrls.map(loadPackage)).then(function(){return Promise.resolve()},function(){return Promise.resolve()})},self.mapPath=function(pkg,pluginUrl){var urlLower=pluginUrl.toLowerCase();if(0===urlLower.indexOf("http:")||0===urlLower.indexOf("https:")||0===urlLower.indexOf("file:"))return pluginUrl;var packageUrl=pkg.url;return packageUrl=packageUrl.substring(0,packageUrl.lastIndexOf("/")),packageUrl+="/",packageUrl+=pluginUrl}}return new packageManager});