real JSON encode / decode for CGRect

CGRect+JSONCodable.swift

import Foundation
import CoreGraphics

// Apple does implement Codable, but is NOT really JSON and fails with arrys of CGRects.
extension CGRect {
    
    func toDict()->Dict{
        let d : Dict = [
            "origin" : ["x" : self.origin.x, "y" : self.origin.y],
            "size" : ["w" : self.size.width, "h" : self.size.height]
            //"size" : ["w": self.size.width, "h" : self.size.h],
        ]
        return d
    }
    
    
    static func from(dict: Dict?)->CGRect?{
        
        guard let dict = dict else {
            return nil
        }
        if let originDict = dict["origin"] as? Dict, let sizeDict = dict["size"] as? Dict {
            
            let x = originDict["x"] as? CGFloat
            let y = originDict["y"] as? CGFloat
            
            let w = sizeDict["w"] as? CGFloat
            let h = sizeDict["h"] as? CGFloat
            
            if let x=x, let y=y, let w=w, let h=h{
                let r = CGRect(origin: CGPoint(x: x, y: y), size: CGSize(width: w, height: h))
                return r
            }
        }
        
        return nil
    }
    
    
    // put in whatever class / controllor on OSX / iOS You want to experiment it.
    // (a dedicated test Unit will be good. but is a Gist...)
    
    static func TestSerialize(){
        
        let IMEIBarCodeRect = CGRect(x: 10, y: 20, width: 100, height: 200)
        let IMEIStringRect = CGRect(x: 11, y: 20, width: 100, height: 200)
        let rectsDict = [
            "IMEIBarCodeRect" : IMEIBarCodeRect.toDict(),
            "IMEIStringRect" : IMEIStringRect.toDict(),
        ]
        
        
        guard let jsonData : Data = try? JSONSerialization.data(withJSONObject: rectsDict, options: []) else{
            return
        }
        
        // to see what we produce... print or save.
        let s = String(data: jsonData, encoding: .utf8)
        
        ///decode:
        if let rectsDict = try? JSONSerialization.jsonObject(with: jsonData, options: [] ) as? Dict {
            
            if let r1 = CGRect.from(dict: rectsDict["IMEIBarCodeRect"] as! Dict){
                print(r1)
                if IMEIBarCodeRect == r1{
                    print("OK")
                }
            }
            
            if let r2 = CGRect.from(dict: rectsDict["IMEIStringRect"] as! Dict){
                print(r2)
                if IMEIStringRect == r2{
                    print("OK")
                }
            }
        }
        
    }
}