vanilla-ajax-v0.01

/*
 | Vanilla JavaScript AJAX Requests
 | = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
 | @author:  Tommy Vercety
 | @version: v0.01 alpha
 | @license: MIT
 |
 | Works on almost all browsers. Implemented getJSON and postJSON methods. For
 | everything else use make();
 |
 | Example:
 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 |
 | var ajax = new MY.VanillaAjax();
 |
 | ajax.getJSON("http://httpbin.org/get?hello=world", function(data) {
 |     console.log(data);
 | });
 |
 | var data = JSON.stringify({
 |     name: "tommy",
 |     pass: "qwerty"
 | });
 |
 | ajax.postJSON("http://httpbin.org/post", data, function(data) {
 |     console.log(data);
 | });
 |
 | ISSUES:
 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 |
 | - some problems sending POST data!
 |
 */

var MY = MY || {}; // namespace

MY.VanillaAjax = (function() {

    /**
     * Constructor.
     *
     * Get the right httpRequest based on your browser
     * @return object httpRequest instance
     */
    function vanillaAjax() {
        vanillaAjax.getHttpRequest = (function () {
            var xmlHttpFactories = [
                function() { return new XMLHttpRequest(); },
                function() { return new ActiveXObject("Msxml3.XMLHTTP"); },
                function() { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); },
                function() { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); },
                function() { return new ActiveXObject("Msxml2.XMLHTTP"); },
                function() { return new ActiveXObject("Microsoft.XMLHTTP"); }
            ];
            return function() {
                var xmlFactory, i, len;
                for(i = 0, len = xmlHttpFactories.length; i < len; i++) {
                    xmlFactory = xmlHttpFactories[i];
                    try {
                        return xmlFactory();
                    } catch (error) {
                        console.log(error);
                    }
                }
                return null;
            };
        })();
    }

    /**
     * Make ajax call
     *
     * @param  object options
     * @return mixed  ajax call data
     */
    vanillaAjax.prototype.make = function(options) {

        var httpRequest, requestUrl, type, success, error, contentType, accept, data;

        httpRequest = vanillaAjax.getHttpRequest();
        options     = options || {};

        requestUrl  = options.url;
        type        = options.type || 'GET';
        success     = options.success || function () {};
        error       = options.error || function () {};
        contentType = options.contentType || '';
        accept      = options.accept || '';
        data        = options.data || null;

        httpRequest.onreadystatechange = function() {
            if (httpRequest.readyState === 4) {
                switch(Math.floor(httpRequest.status / 100)) {
                    case 2:
                        success(httpRequest.responseText);
                        break;
                    default:
                        error(httpRequest.responseText);
                        break;
                }
            }
        };

        httpRequest.open(type, requestUrl, true);
        httpRequest.setRequestHeader('Content-Type', contentType);
        httpRequest.setRequestHeader('Accept', accept);
        return httpRequest.send(data);
    };

    /**
     * Direct JSON GET Requst
     *
     * @param  string   url
     * @param  fucntion success
     * @param  function error
     * @return mixed    ajax call data
     */
    vanillaAjax.prototype.getJSON = function(url, success, error) {
        var options = {
            url: url,
            type: 'GET',
            contentType: 'application/json; charset=utf-8',
            accept: 'application/json',
            success: function(data) {
                if(!success) {return;}
                if(data) {
                    return success(JSON.parse(data));
                } else {
                    return success();
                }
            },
            error: function(err) {
                if(!error) {return;}
                if(err) {
                    return error(JSON.parse(err));
                } else {
                    return error();
                }
            }
        };
        return vanillaAjax.prototype.make(options);
    };

    /**
     * Direct JSON POST Requst
     *
     * @param  string   url
     * @param  object   data    data to be sent
     * @param  fucntion success
     * @param  function error
     * @return mixed    ajax call data
     */
    vanillaAjax.prototype.postJSON = function(url, data, success, error) {
        var options = {
            url: url,
            type: 'POST',
            contentType: 'application/json; charset=utf-8',
            accept: 'application/json',
            data: data,
            success: function(data) {
                if(!success) {return;}
                if(data) {
                    return success(JSON.parse(data));
                } else {
                    return success();
                }
            },
            error: function(err) {
                if(!error) {return;}
                if(err) {
                    return error(JSON.parse(err));
                } else {
                    return error();
                }
            }
        };
        return vanillaAjax.prototype.make(options);
    };

    return vanillaAjax;

}());