javascript - 在 CoffeeScript 中解析参数和匿名函数

Question

如何将此函数转换为 coffeescript 兼容版本？

我的主要问题是 fb.login.. 但是我尝试过我似乎总是丢失其中一个参数或权限...

function promptLogin(login_level, callback)
{
    var cbk = callback;

    FB.login(function(response) {
        if (response.session) {
            if (response.perms) {
                cbk( true, response );
            } else {
                cbk( false, response );
                //showAlert( "Please accept the permissions.", 'Error' );
            }
        } else {
            cbk( false, response );
            //showAlert( "Please accept the permissions.", 'Error' );
        }
        }, {perms:'email,publish_stream'}
    );
}

非常感谢...

加雷思

编辑

感谢您在下面的所有回答，有些有效，有些无效，有些给我带来了其他问题。

我选择了混合搭配的解决方案:

login: (permissions = '', callback) ->
    responseHandler = (response) ->

        if response.session
            if permissions && permissions != ''
                if permissions == response.perms
                    AP.log 'Login accepted - Permissions Accepted', response
                    callback true, response
                else
                    AP.log 'Login rejected - Permissions Rejected', response
                    callback false, response
            else
                AP.log 'Login accepted - No Permissions', response
                callback true, response                 
        else
            AP.log 'Login rejected', response
            callback false, response
        return

    FB.login responseHandler, perms: permissions

感谢所有回答的人。我希望这对其他人有帮助!

亲切的问候，

加雷思

Answer 1

当我抓取 js 片段并想要时，我总是使用 js2coffee快速的 coffeescript 转换。

http://ricostacruz.com/js2coffee/

promptLogin = (login_level, callback) ->
  cbk = callback
  FB.login (response) ->
    if response.session
      if response.perms
        cbk true, response
      else
        cbk false, response
    else
      cbk false, response
  , perms: "email,publish_stream"

然后迭代出明显的

promptLogin = (login_level, callback) ->
  cbk = callback
  FB.login (response) ->
    if response.session
      cbk response.perms, response
    else
      cbk false, response
  , perms: "email,publish_stream"

再一次

promptLogin = (login_level, callback) ->
  FB.login (response) ->
    if response.session
      callback response.perms, response
    else
      callback false, response
  , perms: "email,publish_stream"

直到你终于得到

promptLogin = (login_level, callback) ->
  FB.login (response) ->
      callback
        if response.session then response.perms else false
        response
      , perms: "email,publish_stream"