• api_wrapper.js

var apikey = 'xxxxxxxxxxxxxxxx',
    apiPrefix = 'http://api.stackoverflow.com/1.0/';

if(!Date.now) {
    Date.now = function () {
        return +new Date();
    };
}

var api = {
    _stack: [],
    _running: false,
    _lastCallTime: 0,
    _next: function () {
        var nextData = this._stack.shift();
        
        if(nextData) {
            $.ajax({
                url: apiPrefix + nextData.route, 
                dataType: 'jsonp',
                jsonp: 'jsonp',
                data: $.extend(nextData.data, {
                    api: apikey
                }),
                cache: true,
                context: nextData,
                success: function(data){
                    this.callback(data);
                    
                    if(this.totalPage === data.page) {
                        this.last(data);
                    } else if(data.total - (data.page * 100) > 0) {
                        if(Date.now - this._lastCallTime < 200) {
                            setTimeout(api._next, 200);
                        } else {
                            api._next();
                        }
                    }
                }
            });
        } else {
            this._running = false;
        }
    },
    add: function (route, data, count, callback, afterLast){
        var pageCount = ~~(count / 100),
            lastOffset = (count % 100);
        
        if(lastOffset === 0) pageCount--;
        
        for(var i = 0; i < pageCount + 1; i++) {
            this._stack.push({
                'route': route,
                'data': $.extend({
                    page: i + 1,
                    pageSize: ((i === pageCount) ? lastOffset : 100)
                }, data),
                'callback': callback,
                'last': afterLast,
                'totalPage': (pageCount + 1)
            });
        }
        
        if(!this._running) {
            this._next();
        }
    }
}