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var CAT = {
//[{id: '', name: '', data: [{id: '', name: '', data:[{id: '', name: ''}]},{}, ...]}, {} ...]
data: [],
url: function(){
return 'http://upload.taobao.com/auction/json/reload_cats.htm?t='+Math.random();
},
init: function(){
var url = CAT.url(),
post_data = 'path=all';
CAT.ajax(url, post_data, CAT.first_r);
},
first_r: function(data){
var rs = data[0]['data'],
first_l, first_d, i, j, second_id, second_d, func;
for(i=0;i<rs.length; i++){
//保存一级分类
first_d = rs[i]['data'];
first_l = [];
for(j=0; j<first_d.length; j++){
//保存二级分类同时查询三级分类，并提供存储数据的容器
second_id = first_d[j]['sid'];
second_d = {
'id': first_d[j]['sid'],
'name': first_d[j]['name'],
'spell': first_d[j]['spell'],
'data': []
};
first_l.push(second_d);
func = CAT.second_r(second_d['data']);
CAT.ajax(CAT.url(), 'path=next&sid='+second_id, func);
}
CAT.data.push({
'id': rs[i]['id'],
'name': rs[i]['name'],
'data': first_l
})
}
},
second_r: function(container){
return function(data){
if(data.length<1){
return
}
var rs = data[0]['data'],
i, j, here, third_d;
for(i=0; i<rs.length; i++){
third_d = rs[i]['data'];
for(j=0; j<third_d.length; j++){
here = third_d[j];
container.push({
'id': here['sid'],
'name': here['name'],
'spell': here['spell']
});
}
}
}
},
ajax: function(url, post_data, func){
var xhr = new XMLHttpRequest(),
result;
xhr.open('POST', url, true);
xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xhr.send(post_data);
xhr.onreadystatechange=function(){
if (xhr.readyState==4 && xhr.status==200){
result = JSON.parse(xhr.responseText);
func(result);
}else if(xhr.readyState==4 && (!xhr.status==200)){
console.log('Ajax Return Error!');
}
}
}
};
CAT.init();
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