FOTask

Introduction

FOTask is a microframework (less than 100 LOCs), with a single objective in mind: separation of concerns. Every subclass of Task executes an action. Tasks can be composed in more complex Tasks, or parallelized without effort.

Example usage

Suclassing Task:

final class GetUserTask: Task<Int, User> {
	override func perform(_ input: Int, onSuccess: @escaping (User) -> Void, onError: @escaping (Error) -> Void) {
		ApiClient("https://somecoolapi.com/users/\(input)", .get,
        	onSuccess: { (json: Any) in
            	onSuccess(User(json: json))
            }, 
            onError: { (error: Error) in
            	onError(error)
            }
        ) 
    }
}

Using Task:

let getUserTask = GetUserTask()

getUserTask.perform(3,
	onSuccess: { (user: User) in
    	print(user.name)
    },
    onError: { (error: Error) in
    	print("An error ocurred.")
    }
)

Composing Tasks:

let getUserWithIDTask = GetUserTask()
let getPostsFromUserTask = GetPostsFromUserTask()

let getPostsFromUserID = getUserWithIDTask => getPostsFromUserTask

getPostsFromUserID.perform(3,
	onSuccess: { (posts: [Post]) in
    	print(posts.count)
    },
    onError: { (error: Error) in
    	print("An error ocurred.")
    }
)

Parallelize Tasks

let getALotOfUserNames = Task.parallel(
    [
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName(),
        GetUserName()
    ],
    reduce: { (userNames: [String]) -> [String] in
        return userNames
    }
)

getALotOfUserNames.perform(Void(),
    onSuccess: { userNames in
        print(userNames)
    },
    onError: { error in
        print("An Error!")
    }
)