another.im-ios/ConversationsClassic/View/UIToolkit/UIImage+Crop.swift

import UIKit

extension UIImage {
    func scaleAndCropImage(toExampleSize _: CGSize, completion: @escaping (UIImage?) -> Void) {
        DispatchQueue.global(qos: .background).async {
            guard let cgImage = self.cgImage else {
                DispatchQueue.main.async {
                    completion(nil)
                }
                return
            }
            let contextImage: UIImage = .init(cgImage: cgImage)
            var contextSize: CGSize = contextImage.size

            var posX: CGFloat = 0.0
            var posY: CGFloat = 0.0
            let cgwidth: CGFloat = self.size.width
            let cgheight: CGFloat = self.size.height

            // Check and handle if the image is wider than the requested size
            if contextSize.width > contextSize.height {
                posX = ((contextSize.width - contextSize.height) / 2)
                contextSize.width = contextSize.height
            } else if contextSize.width < contextSize.height {
                // Check and handle if the image is taller than the requested size
                posY = ((contextSize.height - contextSize.width) / 2)
                contextSize.height = contextSize.width
            }

            let rect: CGRect = .init(x: posX, y: posY, width: cgwidth, height: cgheight)
            guard let contextCg = contextImage.cgImage, let imgRef = contextCg.cropping(to: rect) else {
                DispatchQueue.main.async {
                    completion(nil)
                }
                return
            }
            let image: UIImage = .init(cgImage: imgRef, scale: self.scale, orientation: self.imageOrientation)

            completion(image)
        }
    }
}