Simple Protocol to convert swift structs to dictionaries

structToDic.playground

import UIKit

struct Person: DictionaryConvertor {
    let name: String
    let job: [Job]?
    let errors: [String]?
}

struct Job: DictionaryConvertor {
    let title: String
    let salary: Salary
    let level: Int
}

struct Salary: DictionaryConvertor {
    let amount: Int
    let currency: String
}

protocol DictionaryConvertor {
    func toDictionary() -> [String : Any]
}

extension DictionaryConvertor {
    
    func toDictionary() -> [String : Any] {
        let reflect = Mirror(reflecting: self)
        let children = reflect.children
        let dictionary = toAnyHashable(elements: children)
        return dictionary
    }
    
    func toAnyHashable(elements: AnyCollection<Mirror.Child>) -> [String : Any] {
        var dictionary: [String : Any] = [:]
        for element in elements {
            if let key = element.label {
                
                if let collectionValidHashable = element.value as? [AnyHashable] {
                    dictionary[key] = collectionValidHashable
                }
                
                if let validHashable = element.value as? AnyHashable {
                    dictionary[key] = validHashable
                }
                
                if let convertor = element.value as? DictionaryConvertor {
                    dictionary[key] = convertor.toDictionary()
                }
                
                if let convertorList = element.value as? [DictionaryConvertor] {
                    dictionary[key] = convertorList.map({ e in
                        e.toDictionary()
                    })
                }
            }
        }
        return dictionary
    }
}


let salary = Salary(amount: 100, currency: "EURO")
let job = Job(title: "Dittybopper", salary: salary, level: 5)
let job2 = Job(title: "Substitute Teacher", salary: salary, level: 5)

let person = Person(name: "Juzo", job: [job, job2], errors: []).toDictionary()
print(person)

let responseData = try! JSONSerialization.data(withJSONObject: person, options: .prettyPrinted)
print(responseData)

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