//

// RegexHelpers.swift

// Unwrap

//

// Created by Paul Hudson on 09/08/2018.

// Copyright © 2018 Hacking with Swift.

//

import Foundation

extension String {

/// Replaces only one regex match with a replacement string. Used when generating errors, because we want to do things like remove only one quote mark.

func replacingOne(of search: String, with replacement: String) -> String {

let regex = NSRegularExpression(search)

let matches = regex.matches(in: self, options: [], range: NSRange(location: 0, length: self.utf16.count)).shuffled()

if let match = matches.first {

let range = match.range(at: 1)

if let swiftRange = Range(range, in: self) {

let textMatch = self[swiftRange]

return self.replacingOccurrences(of: textMatch, with: replacement, options: [], range: swiftRange)

}

}

return self

}

}