Swift Completion Handler Not Called on Second Call to Function - swift

Question

I have a Swift function with a completion handler that I want to be called when a certain network request is done. The network request can be repeated based on if the server response says there is more data (offset is provided).
I initially call it like this:
func myMainFunction(){
getTasks(project: project, paginationToken: nil) {
print("This never fires...")
}
}
And my getTasks() function is like this:
func getTasks(project: Project, paginationToken: String?, completion: #escaping () -> Void){
var url = "..."
if let token = paginationToken{
url += "&offset=\(token)"
}
Alamofire.request(url).responseJSON { response in
switch response.result {
case .success(let value):
let json = JSON(value)
//...
//Check for pagination
let offset = json["next_page"]["offset"].stringValue
if !offset.isEmpty{
//Theres a pagination token available, go again!
getTasks(project: project, paginationToken: offset){}
}else{
print("This prints to the log on the last run through")
completion()
}
case .failure(let error):
print("Task error: \(error)")
}
}
}
If there is never an offset then the completion() handler works fine. But if getTasks() has to be called again, the completion handler is somehow invalidated and never returns to my original myMainFunction().
Any ideas?

Answer 1

You are passing empty closure if offset is not empty. You need to forward the completion param to getTasks again. Try this.
//...
if !offset.isEmpty {
getTasks(project: project, paginationToken: offset, completion: completion)
}
//...