LONDON-IOS/GMERemittance/Library/ImageCroper.swift

//
//  ImageCroper.swift
//  
//
//  Created by shishir sapkota
//

import Foundation
import RSKImageCropper

protocol ImageCropperDelegate {
    func didCropWith(image: UIImage)
    func didFailedCropWith(error: Error)
}


class ImageCroper: NSObject {

    var imageCropper: RSKImageCropViewController = RSKImageCropViewController()
    weak var presentingViewController: UIViewController?
    
    var delegate: ImageCropperDelegate?
    
    fileprivate var cropRatio: CGFloat = 1

    init(presentingViewController: UIViewController) {
        super.init()
        self.presentingViewController = presentingViewController
        self.imageCropper.delegate = self
        self.imageCropper.dataSource = self
    }
    
    func cropImage(image: UIImage, ratio: CGFloat = 1) {
        self.cropRatio = ratio
        self.imageCropper = RSKImageCropViewController(image: image, cropMode: .custom)
        imageCropper.chooseButton.setTitle("done_text", for: .normal)
        self.imageCropper.delegate = self
        self.imageCropper.dataSource = self
        self.presentingViewController?.present(imageCropper, animated: true, completion: nil)
    }
}


extension ImageCroper: RSKImageCropViewControllerDelegate {

    func imageCropViewControllerDidCancelCrop(_ controller: RSKImageCropViewController) {
        presentingViewController?.dismiss(animated: true, completion: nil)
    }
    
    func imageCropViewController(_ controller: RSKImageCropViewController, didCropImage croppedImage: UIImage, usingCropRect cropRect: CGRect) {
        presentingViewController?.dismiss(animated: true, completion: { 
            // image cropped here
            
            self.delegate?.didCropWith(image: croppedImage)
        })
    }
    
    func imageCropViewController(_ controller: RSKImageCropViewController, didCropImage croppedImage: UIImage, usingCropRect cropRect: CGRect, rotationAngle: CGFloat) {
         self.delegate?.didCropWith(image: croppedImage)
        self.imageCropper.dismiss(animated: true, completion: nil)
    }
}


extension ImageCroper: RSKImageCropViewControllerDataSource {

    
    func imageCropViewControllerCustomMaskRect(_ controller: RSKImageCropViewController) -> CGRect {
        guard let viewController = presentingViewController else {return CGRect.zero}
        
        var maskSize:CGSize
        let heightRatio: CGFloat = self.cropRatio //35/71
        
        let maskWidth:CGFloat = UIScreen.main.bounds.size.width - 40
        
        let maskHeight: CGFloat = CGFloat( ceilf( Float(maskWidth * heightRatio)))
        
        
        
        maskSize = CGSize(width: maskWidth, height: maskHeight)
        
        let maskRect: CGRect = CGRect(x: (viewController.view.frame.size.width - maskSize.width ) * 0.5, y: (viewController.view.frame.size.height - maskSize.height) * 0.5, width: maskSize.width, height: maskSize.height)
        
        
        return maskRect
    }
    
    
    func imageCropViewControllerCustomMaskPath(_ controller: RSKImageCropViewController) -> UIBezierPath {
        let rect = controller.maskRect;
        
        let point1 = CGPoint(x: rect.minX,y: rect.minY);
        let point2 = CGPoint(x: rect.maxX, y: rect.minY);
        let point3 = CGPoint(x: rect.maxX, y: rect.maxY);
        let point4 = CGPoint(x: rect.minX, y: rect.maxY);
        
        let rectangle = UIBezierPath()
        
        rectangle.move(to: point1)
        rectangle.addLine(to: point2)
        rectangle.addLine(to: point3)
        rectangle.addLine(to: point4)
        rectangle.close()
        
        return rectangle;
    }
    
    func imageCropViewControllerCustomMovementRect(_ controller: RSKImageCropViewController) -> CGRect {
        return controller.maskRect
    }
}