Ajax Caller

Ajax Caller

var appCaller = {
    /**
     * Handler for all async application calls
     * @param  {[Object]} ajaxSetupJSON [This is passed to $.ajaxSetup()],
     * URL and data are expected to be sent
     * @param  {[function]} successCallback [function to be called on success response]
     * @param  {[function]} errorCallback   [function to be called on error response]
     * @param  {[function]} completeCallBack   [function to be called on response completion, it's OPTIONAL]
     * @return {[function]} [based on error]
     */
    callAsync: function (ajaxSetupJSON, successCallback, errorCallback, completeCallBack) {
        ajaxSetupJSON.async = true;
        this.defaultAjaxSetup(ajaxSetupJSON);
        return $.ajax(ajaxSetupJSON)
            .done(function (data, textStatus, jqXHR) {
                if (successCallback) {
                    successCallback(data, textStatus, jqXHR);
                }
            })
            .fail(function (jqXHR, textStatus, errorThrown) {
                if (errorCallback) {
                    errorCallback(jqXHR, textStatus, errorThrown);
                }
            })
            .always(function () {
                if (completeCallBack) {
                    completeCallBack();
                }
            });
    },

    /**
     * Handler for all async application calls
     * @param  {[Object]} ajaxSetupJSON [This is passed to $.ajaxSetup()],
     * @return {[responseObject]} [response from success/error]
     */
    callSync: function (ajaxSetupJSON, successCallback, errorCallback, completeCallBack) {
        ajaxSetupJSON.async = false;
        this.defaultAjaxSetup(ajaxSetupJSON);

        var resp = "";
        $.ajax(ajaxSetupJSON)
            .done(function (data, textStatus, jqXHR) {
                if (successCallback) {
                    successCallback(data, textStatus, jqXHR);
                }
                resp = data;
            })
            .fail(function (jqXHR, textStatus, errorThrown) {
                if (errorCallback) {
                    errorCallback(jqXHR, textStatus, errorThrown);
                }
                resp = jqXHR;
            })
            .always(function () {
                if (completeCallBack) {
                    completeCallBack();
                }
            });
        return resp;
    },

    /**
     * Gives a default configuration to request object
     */
    defaultAjaxSetup: function (ajaxJSON) {
        if (!ajaxJSON.cache) ajaxJSON.cache = false;
        if (!ajaxJSON.type) ajaxJSON.type = 'POST';
        if (!ajaxJSON.dataType) ajaxJSON.dataType = 'json';
        if (!ajaxJSON.contentType) ajaxJSON.contentType = 'application/json; charset=utf-8';
        if (!ajaxJSON.timeout) ajaxJSON.timeout = 600000;
        if (!ajaxJSON.headers) ajaxJSON.headers = {
            'cache-control': 'no-cache'
        };
    }
};

Removing $.ajaxSetup, it would have run into issues if ran multiple times.