define([],function(){"use strict";function page(path,fn){if("function"==typeof path)return page("*",path);if("function"==typeof fn)for(var route=new Route(path),i=1;i<arguments.length;++i)page.callbacks.push(route.middleware(arguments[i]));else"string"==typeof path?page["string"==typeof fn?"redirect":"show"](path,fn):page.start(path)}function unhandled(ctx){if(!ctx.handled){var current;current=hashbang?base+location.hash.replace("#!",""):location.pathname+location.search,current!==ctx.canonicalPath&&(page.stop(),ctx.handled=!1,location.href=ctx.canonicalPath)}}function decodeURLEncodedURIComponent(val){return"string"!=typeof val?val:decodeURLComponents?decodeURIComponent(val.replace(/\+/g," ")):val}function Context(path,state){"/"===path[0]&&0!==path.indexOf(base)&&(path=base+(hashbang?"#!":"")+path);var i=path.indexOf("?");if(this.canonicalPath=path,this.path=path.replace(base,"")||"/",hashbang&&(this.path=this.path.replace("#!","")||"/"),this.title=document.title,this.state=state||{},this.state.path=path,this.querystring=~i?decodeURLEncodedURIComponent(path.slice(i+1)):"",this.pathname=decodeURLEncodedURIComponent(~i?path.slice(0,i):path),this.params={},this.hash="",!hashbang){if(!~this.path.indexOf("#"))return;var parts=this.path.split("#");this.path=parts[0],this.hash=decodeURLEncodedURIComponent(parts[1])||"",this.querystring=this.querystring.split("#")[0]}}function Route(path,options){options=options||{},this.path="*"===path?"(.*)":path,this.method="GET",this.regexp=pathToRegexp(this.path,this.keys=[],options.sensitive,options.strict)}function ignorePopState(event){var state=event.state||{};return previousPopState.navigate===!1?(previousPopState=state,!0):(previousPopState=state,!1)}function onclick(e){if(1===which(e)&&!(e.metaKey||e.ctrlKey||e.shiftKey||e.defaultPrevented)){for(var el=e.target;el&&"A"!==el.nodeName;)el=el.parentNode;if(el&&"A"===el.nodeName&&!el.hasAttribute("download")&&"external"!==el.getAttribute("rel")){var link=el.getAttribute("href");if("#"===link)return void e.preventDefault();if((hashbang||el.pathname!==location.pathname||!el.hash&&"#"!==link)&&!(link&&link.indexOf("mailto:")>-1)&&!el.target&&sameOrigin(el.href)){var path=el.pathname+el.search+(el.hash||""),orig=path;0===path.indexOf(base)&&(path=path.substr(base.length)),hashbang&&(path=path.replace("#!","")),base&&orig===path||(e.preventDefault(),page.show(orig))}}}}function which(e){return e=e||window.event,null===e.which?e.button:e.which}function sameOrigin(href){var origin=location.protocol+"//"+location.hostname;return location.port&&(origin+=":"+location.port),href&&0===href.indexOf(origin)}function parse(str){for(var res,tokens=[],key=0,index=0,path="";null!=(res=PATH_REGEXP.exec(str));){var m=res[0],escaped=res[1],offset=res.index;if(path+=str.slice(index,offset),index=offset+m.length,escaped)path+=escaped[1];else{path&&(tokens.push(path),path="");var prefix=res[2],name=res[3],capture=res[4],group=res[5],suffix=res[6],asterisk=res[7],repeat="+"===suffix||"*"===suffix,optional="?"===suffix||"*"===suffix,delimiter=prefix||"/",pattern=capture||group||(asterisk?".*":"[^"+delimiter+"]+?");tokens.push({name:name||key++,prefix:prefix||"",delimiter:delimiter,optional:optional,repeat:repeat,pattern:escapeGroup(pattern)})}}return index<str.length&&(path+=str.substr(index)),path&&tokens.push(path),tokens}function escapeString(str){return str.replace(/([.+*?=^!:${}()[\]|\/])/g,"\\$1")}function escapeGroup(group){return group.replace(/([=!:$\/()])/g,"\\$1")}function attachKeys(re,keys){return re.keys=keys,re}function flags(options){return options.sensitive?"":"i"}function regexpToRegexp(path,keys){var groups=path.source.match(/\((?!\?)/g);if(groups)for(var i=0;i<groups.length;i++)keys.push({name:i,prefix:null,delimiter:null,optional:!1,repeat:!1,pattern:null});return attachKeys(path,keys)}function arrayToRegexp(path,keys,options){for(var parts=[],i=0;i<path.length;i++)parts.push(pathToRegexp(path[i],keys,options).source);var regexp=new RegExp("(?:"+parts.join("|")+")",flags(options));return attachKeys(regexp,keys)}function stringToRegexp(path,keys,options){for(var tokens=parse(path),re=tokensToRegExp(tokens,options),i=0;i<tokens.length;i++)"string"!=typeof tokens[i]&&keys.push(tokens[i]);return attachKeys(re,keys)}function tokensToRegExp(tokens,options){options=options||{};for(var strict=options.strict,end=options.end!==!1,route="",lastToken=tokens[tokens.length-1],endsWithSlash="string"==typeof lastToken&&/\/$/.test(lastToken),i=0;i<tokens.length;i++){var token=tokens[i];if("string"==typeof token)route+=escapeString(token);else{var prefix=escapeString(token.prefix),capture=token.pattern;token.repeat&&(capture+="(?:"+prefix+capture+")*"),capture=token.optional?prefix?"(?:"+prefix+"("+capture+"))?":"("+capture+")?":prefix+"("+capture+")",route+=capture}}return strict||(route=(endsWithSlash?route.slice(0,-2):route)+"(?:\\/(?=$))?"),route+=end?"$":strict&&endsWithSlash?"":"(?=\\/|$)",new RegExp("^"+route,flags(options))}function pathToRegexp(path,keys,options){return keys=keys||[],isarray(keys)?options||(options={}):(options=keys,keys=[]),path instanceof RegExp?regexpToRegexp(path,keys,options):isarray(path)?arrayToRegexp(path,keys,options):stringToRegexp(path,keys,options)}var running,prevContext,clickEvent="undefined"!=typeof document&&document.ontouchstart?"touchstart":"click",location="undefined"!=typeof window&&(window.history.location||window.location),dispatch=!0,decodeURLComponents=!0,base="",hashbang=!1,enableHistory=!1;page.callbacks=[],page.exits=[],page.current="",page.len=0,page.base=function(path){return 0===arguments.length?base:void(base=path)},page.start=function(options){if(options=options||{},!running&&(running=!0,!1===options.dispatch&&(dispatch=!1),!1===options.decodeURLComponents&&(decodeURLComponents=!1),!1!==options.popstate&&window.addEventListener("popstate",onpopstate,!1),!1!==options.click&&document.addEventListener(clickEvent,onclick,!1),null!=options.enableHistory&&(enableHistory=options.enableHistory),!0===options.hashbang&&(hashbang=!0),dispatch)){var url=hashbang&&~location.hash.indexOf("#!")?location.hash.substr(2)+location.search:location.pathname+location.search+location.hash;page.replace(url,null,!0,dispatch)}},page.stop=function(){running&&(page.current="",page.len=0,running=!1,document.removeEventListener(clickEvent,onclick,!1),window.removeEventListener("popstate",onpopstate,!1))},page.show=function(path,state,dispatch,push,isBack){var ctx=new Context(path,state);return ctx.isBack=isBack,page.current=ctx.path,!1!==dispatch&&page.dispatch(ctx),!1!==ctx.handled&&!1!==push&&ctx.pushState(),ctx},page.back=function(path,state){if(enableHistory)return void history.back();if(page.len>0){if(enableHistory)history.back();else if(backStack.length>2){backStack.length--;var previousState=backStack[backStack.length-1];page.show(previousState.path,previousState.state,!0,!1,!0)}page.len--}else path?setTimeout(function(){page.show(path,state)}):setTimeout(function(){page.show(base,state)})},page.enableNativeHistory=function(){return enableHistory},page.canGoBack=function(){return enableHistory?history.length>1:(page.len||0)>0},page.redirect=function(from,to){"string"==typeof from&&"string"==typeof to&&page(from,function(e){setTimeout(function(){page.replace(to)},0)}),"string"==typeof from&&"undefined"==typeof to&&setTimeout(function(){page.replace(from)},0)},page.replace=function(path,state,init,dispatch,isBack){var ctx=new Context(path,state);return ctx.isBack=isBack,page.current=ctx.path,ctx.init=init,ctx.save(),!1!==dispatch&&page.dispatch(ctx),ctx},page.dispatch=function(ctx){function nextExit(){var fn=page.exits[j++];return fn?void fn(prev,nextExit):nextEnter()}function nextEnter(){var fn=page.callbacks[i++];return ctx.path!==page.current?void(ctx.handled=!1):fn?void fn(ctx,nextEnter):unhandled(ctx)}var prev=prevContext,i=0,j=0;prevContext=ctx,prev?nextExit():nextEnter()},page.exit=function(path,fn){if("function"==typeof path)return page.exit("*",path);for(var route=new Route(path),i=1;i<arguments.length;++i)page.exits.push(route.middleware(arguments[i]))},page.Context=Context;var backStack=[];Context.prototype.pushState=function(){page.len++,enableHistory?history.pushState(this.state,this.title,hashbang&&"/"!==this.path?"#!"+this.path:this.canonicalPath):backStack.push({state:this.state,title:this.title,url:hashbang&&"/"!==this.path?"#!"+this.path:this.canonicalPath,path:this.path})},Context.prototype.save=function(){enableHistory?history.replaceState(this.state,this.title,hashbang&&"/"!==this.path?"#!"+this.path:this.canonicalPath):backStack[page.len||0]={state:this.state,title:this.title,url:hashbang&&"/"!==this.path?"#!"+this.path:this.canonicalPath,path:this.path}},page.Route=Route,Route.prototype.middleware=function(fn){var self=this;return function(ctx,next){return self.match(ctx.path,ctx.params)?fn(ctx,next):void next()}},Route.prototype.match=function(path,params){var keys=this.keys,qsIndex=path.indexOf("?"),pathname=~qsIndex?path.slice(0,qsIndex):path,m=this.regexp.exec(decodeURIComponent(pathname));if(!m)return!1;for(var i=1,len=m.length;i<len;++i){var key=keys[i-1],val=decodeURLEncodedURIComponent(m[i]);void 0===val&&hasOwnProperty.call(params,key.name)||(params[key.name]=val)}return!0};var previousPopState={};page.pushState=function(state,title,url){hashbang&&(url="#!"+url),history.pushState(state,title,url),previousPopState=state};var onpopstate=function(){var loaded=!1;if("undefined"!=typeof window)return"complete"===document.readyState?loaded=!0:window.addEventListener("load",function(){setTimeout(function(){loaded=!0},0)}),function(e){if(loaded&&!ignorePopState(e))if(e.state){var path=e.state.path;page.replace(path,e.state,null,null,!0)}else page.show(location.pathname+location.hash,void 0,void 0,!1,!0)}}();page.sameOrigin=sameOrigin;var PATH_REGEXP=new RegExp(["(\\\\.)","([\\/.])?(?:(?:\\:(\\w+)(?:\\(((?:\\\\.|[^()])+)\\))?|\\(((?:\\\\.|[^()])+)\\))([+*?])?|(\\*))"].join("|"),"g"),isarray=Array.isArray||function(arr){return"[object Array]"===Object.prototype.toString.call(arr)};return page});