json - How to write own model mapper in Swift Language

Question

I have a requirement for mapping values coming from service layer to the UI key values. Let's say two values are coming from the service layer in array of dictionary

{
    ["identifier": "1", "fullname": "Bob Steve"]
}

I have to modify the key in my side identifier to become id & fullname to become name. How to write a model mapper to do so. Can anyone guide me how to write a model mapper.

There are lot of third party model mapper available, but I want to write my own.

Thanks in advance.

Answer 1

You could do it something like this:

class Mapper {
    // Singel object
    func person(obj: [String: Any]) -> Person {
        guard let identifier = obj["identifier"] as? String, let fullname = obj["fullname"] as? String else { return ...}

        let person = Person(identifier: identifier, fullname: fullname)
        return person
    }

    // Dictionary
    func persons(dictionary: [[String: Any]]) -> [Person] {
        for obj in dictionary {
            let person = person(obj)
            persons.append(person);
        }
        return persons
    }
}

Assuming you have a Person class for instance.