add JSON utils

JSONDecodable.swift

@@ -0,0 +1,83 @@
+//
+//  JSONDecodable.swift
+//  Swift-idl
+//
+//  Created by Safx Developer on 2015/05/12.
+//  Copyright (c) 2015年 Safx Developers. All rights reserved.
+//
+
+import Foundation
+
+protocol JSONDecodable {
+    typealias DecodedType = Self
+    static func parseJSON(data: [String: AnyObject]) -> (decoded: DecodedType?, error: String?)
+}
+
+// MARK:
+
+extension NSURL {
+    static func parseJSON(data: AnyObject) -> (NSURL?, String?) {
+        if let v = data as? String {
+            return (NSURL(string: v), nil)
+        }
+        return (nil, "Type translate failed in NSURL")
+    }
+}
+
+extension NSDate {
+    static func parseJSON(data: AnyObject) -> (NSDate?, String?) {
+        if let v = data as? String {
+            let dateFormatter = NSDateFormatter()
+            dateFormatter.dateFormat = "yyyy-MM-dd"
+            if let newDate = dateFormatter.dateFromString(v) {
+                return (newDate, nil)
+            }
+        }
+        return (nil, "Type translate failed in NSDate")
+    }
+}
+
+extension String {
+    static func parseJSON(data: AnyObject) -> (String?, String?) {
+        if let v = data as? String {
+            return (v, nil)
+        }
+        return (nil, "Type translate failed in String")
+    }
+}
+
+extension Float {
+    static func parseJSON(data: AnyObject) -> (Float?, String?) {
+        if let v = data as? NSNumber {
+            return (v.floatValue, nil)
+        }
+        return (nil, "Type translate failed in Float")
+    }
+}
+
+extension Int {
+    static func parseJSON(data: AnyObject) -> (Int?, String?) {
+        if let v = data as? NSNumber {
+            return (v.integerValue, nil)
+        }
+        return (nil, "Type translate failed in Int")
+    }
+}
+
+extension UInt {
+    static func parseJSON(data: AnyObject) -> (UInt?, String?) {
+        if let v = data as? NSNumber {
+            return (UInt(v.unsignedIntegerValue), nil)
+        }
+        return (nil, "Type translate failed in UInt")
+    }
+}
+
+extension Bool {
+    static func parseJSON(data: AnyObject) -> (Bool?, String?) {
+        if let v = data as? NSNumber {
+            return (v.boolValue, nil)
+        }
+        return (nil, "Type translate failed in Bool")
+    }
+}

JSONEncodable.swift

@@ -0,0 +1,59 @@
+//
+//  JSONEncodable.swift
+//  Swift-idl
+//
+//  Created by Safx Developer on 2015/05/12.
+//  Copyright (c) 2015年 Safx Developers. All rights reserved.
+//
+
+import Foundation
+
+protocol JSONEncodable {
+    func toJSON() -> [String: AnyObject]
+}
+
+// MARK:
+
+extension NSURL {
+    func toJSON() -> String {
+        return self.absoluteString!
+    }
+}
+
+extension NSDate {
+    func toJSON() -> String {
+        let dateFormatter = NSDateFormatter()
+        dateFormatter.dateFormat = "yyyy-MM-dd"
+        return dateFormatter.stringFromDate(self)
+    }
+}
+
+extension String {
+    func toJSON() -> String {
+        return self
+    }
+}
+
+extension Float {
+    func toJSON() -> NSNumber {
+        return NSNumber(float: self)
+    }
+}
+
+extension Int {
+    func toJSON() -> NSNumber {
+        return NSNumber(integer: self)
+    }
+}
+
+extension UInt {
+    func toJSON() -> NSNumber {
+        return NSNumber(unsignedLong: self)
+    }
+}
+
+extension Bool {
+    func toJSON() -> NSNumber {
+        return NSNumber(bool: self)
+    }
+}