Meteor wrapAsync returning undefined to external service using php connector - asynchronous

Question

I've been stuck on this for way too long. Can anyone help show me why my wrapasync method is returning as "undefined"? I'm trying to make a call to Facebook api and have used a php connector that my meteor app should use to talk to the Facebook PHP SDK. My app talks to the my php file and returns simple functions. But when I actually call the external service it comes back as undefined, although when I run the php function in php it comes out fine and returns expected results. Here's the code, everything is server-side:
var phpAsync = function() {
var execPhp = Meteor.npmRequire('exec-php');
execPhp('C:/xampp/htdocs/xampp/Facebook/file.php', function(error, php, output){
// php now contain user defined php functions.
php.me( function(error, result, output, printed){
// `result` is return value of `my_own_php_function` php function.
console.log(result);
return result;
});
});
};
Meteor.methods({
phpConnect: function () {
var phpSync = Meteor.wrapAsync(phpAsync);
var result = phpSync();
console.log(result);
return result
}
});

Answer 1

The function that is passed in to Meteor.wrapAsync should have callback as the final parameter. From the docs,
Wrap a function that takes a callback function as its final parameter.
The signature of the callback of the wrapped function should be
function(error, result){}
So you should do something like this,
var phpSync = function() {
var execPhp = Meteor.npmRequire('exec-php');
var execPhpSync = Meteor.wrapAsync(execPhp);
var php = execPhpSync('C:/xampp/htdocs/xampp/Facebook/file.php');
php.meSync = Meteor.wrapAsync(php.me);
var result = php.meSync();
console.log(result);
return result;
};
Meteor.methods({
phpConnect: function () {
var result = phpSync();
console.log(result);
return result;
}
});
OR
if you want other stuff like output and printed then you do it like this
var phpAsync = function(cb) {
var execPhp = Meteor.npmRequire('exec-php');
execPhp('C:/xampp/htdocs/xampp/Facebook/file.php', function(error, php, output){
//IMPORTANT: you need to call php.me only if there is no error
// php now contain user defined php functions.
php.me( function(error, result, output, printed){
// `result` is return value of `my_own_php_function` php function.
if (typeof cb === "function) {
cb(error, {
result: result,
output: output,
printed: printed
});
}
});
});
};
Meteor.methods({
phpConnect: function () {
var phpSync = Meteor.wrapAsync(phpAsync);
var result = phpSync();
console.log(result.result, result.output, result.printed);
return result.result;
}
});