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Deserialization.swift
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136 lines (106 loc) · 2.95 KB
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//
// Copyright © 2016 Baris Sencan. All rights reserved.
//
import Foundation
/// TODOC
public protocol Deserializable {
/// TODOC
init(dictionary: [String : AnyObject])
}
// MARK: - Helper Methods
private func dataStringToObject(dataString: String) -> AnyObject? {
guard let data: NSData = dataString.dataUsingEncoding(NSUTF8StringEncoding) else { return nil }
var jsonObject: AnyObject?
do {
jsonObject = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions(rawValue: 0))
} catch {}
return jsonObject
}
// MARK: - Basic Deserialization
public func <-- <D: Deserializable, T>(inout lhs: D?, rhs: T?) -> D? {
let cleanedValue = JSONHelper.convertToNilIfNull(rhs)
if let jsonObject = cleanedValue as? NSDictionary as? [String : AnyObject] {
lhs = D(dictionary: jsonObject)
} else if let string = cleanedValue as? String {
lhs <-- dataStringToObject(string)
} else {
lhs = nil
}
return lhs
}
public func <-- <D: Deserializable, T>(inout lhs: D, rhs: T?) -> D {
var newValue: D?
newValue <-- rhs
lhs = newValue ?? lhs
return lhs
}
// MARK: - Array Deserialization
public func <-- <D: Deserializable, T>(inout lhs: [D]?, rhs: [T]?) -> [D]? {
guard let rhs = rhs else { return nil }
lhs = [D]()
for element in rhs {
var convertedElement: D?
convertedElement <-- element
if let convertedElement = convertedElement {
lhs?.append(convertedElement)
}
}
return lhs
}
public func <-- <D: Deserializable, T>(inout lhs: [D], rhs: [T]?) -> [D] {
var newValue: [D]?
newValue <-- rhs
lhs = newValue ?? lhs
return lhs
}
public func <-- <D: Deserializable, T>(inout lhs: [D]?, rhs: T?) -> [D]? {
guard let rhs = rhs else { return nil }
if let elements = rhs as? NSArray as? [AnyObject] {
return lhs <-- elements
}
return nil
}
public func <-- <D: Deserializable, T>(inout lhs: [D], rhs: T?) -> [D] {
var newValue: [D]?
newValue <-- rhs
lhs = newValue ?? lhs
return lhs
}
// MARK: - Dictionary Deserialization
public func <-- <T, D: Deserializable, U>(inout lhs: [T : D]?, rhs: [T : U]?) -> [T : D]? {
guard let rhs = rhs else {
lhs = nil
return lhs
}
lhs = [T : D]()
for (key, value) in rhs {
var convertedValue: D?
convertedValue <-- value
if let convertedValue = convertedValue {
lhs?[key] = convertedValue
}
}
return lhs
}
public func <-- <T, D: Deserializable, U>(inout lhs: [T : D], rhs: [T : U]?) -> [T : D] {
var newValue: [T : D]?
newValue <-- rhs
lhs = newValue ?? lhs
return lhs
}
public func <-- <T, D: Deserializable, U>(inout lhs: [T : D]?, rhs: U?) -> [T : D]? {
guard let rhs = rhs else {
lhs = nil
return lhs
}
if let elements = rhs as? NSDictionary as? [T : AnyObject] {
return lhs <-- elements
}
return nil
}
public func <-- <T, D: Deserializable, U>(inout lhs: [T : D], rhs: U?) -> [T : D] {
var newValue: [T : D]?
newValue <-- rhs
lhs = newValue ?? lhs
return lhs
}