Get SVG from UIBezierPath

UIBezierPath+SVGString.swift

// Converted from: https://github.com/GenerallyHelpfulSoftware/SVGgh/blob/master/SVGgh/SVGRenderer/SVGPathGenerator.m#L1873
extension UIBezierPath {
    var svgPathString: String {
        var finalString = ""
        let cgPath = self.cgPath
        var currentPoint = CGPoint.zero
        cgPath.applyWithBlock { (aPathElement) in
            switch aPathElement.pointee.type {
            case .moveToPoint:
                currentPoint = aPathElement.pointee.points[0]
                finalString = finalString.appendingFormat("M%.1lf,%.1lf", currentPoint.x, currentPoint.y)
            case .addLineToPoint:
                let newPoint = aPathElement.pointee.points[0]
                if newPoint.x == currentPoint.x {
                    finalString = finalString.appendingFormat("V%.1lf", newPoint.y)
                } else if newPoint.y == currentPoint.y {
                    finalString = finalString.appendingFormat("H%.1lf", newPoint.x)
                } else {
                    finalString = finalString.appendingFormat("L%.1lf,%.1lf", newPoint.x, newPoint.y)
                }
                currentPoint = newPoint
            case .addQuadCurveToPoint:
                let controlPoint = aPathElement.pointee.points[0]
                let newPoint = aPathElement.pointee.points[1]
                finalString = finalString.appendingFormat("Q%.1lf,%.1lf,%.1lf,%.1lf", controlPoint.x, controlPoint.y, newPoint.x, newPoint.y)
                currentPoint = newPoint
            case .addCurveToPoint:
                let controlPoint1 = aPathElement.pointee.points[0]
                let controlPoint2 = aPathElement.pointee.points[1]
                let newPoint = aPathElement.pointee.points[2]
                // swiftlint:disable multiline_arguments
                finalString = finalString.appendingFormat("C%.1lf,%.1lf,%.1lf,%.1lf,%.1lf,%.1lf",
                                                          controlPoint1.x, controlPoint1.y,
                                                          controlPoint2.x, controlPoint2.y,
                                                          newPoint.x, newPoint.y)
                // swiftlint:enable multiline_arguments
                currentPoint = newPoint
            case .closeSubpath:
                finalString.append("Z")
            }
        }
        return finalString
    }
}