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Use unicode regex for email validation #3936

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Use unicode regex for email validation #3936

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4a1d6f0
Use unicode regex for email validation
mpivchev Dec 22, 2025
fc02649
Update iOSClient/Share/NCShare.swift
mpivchev Dec 22, 2025
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25 changes: 9 additions & 16 deletions iOSClient/Share/NCShare.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,6 @@ class NCShare: UIViewController, NCSharePagingContent {
networking = NCShareNetworking(metadata: metadata, view: self.view, delegate: self, session: session)
let isVisible = (self.navigationController?.topViewController as? NCSharePaging)?.page == .sharing
networking?.readShare(showLoadingIndicator: isVisible)

searchField.searchTextField.font = .systemFont(ofSize: 14)
searchField.delegate = self
}
Expand Down Expand Up @@ -201,13 +200,6 @@ class NCShare: UIViewController, NCSharePagingContent {
// MARK: - IBAction

@IBAction func searchFieldDidEndOnExit(textField: UITextField) {
// https://stackoverflow.com/questions/25471114/how-to-validate-an-e-mail-address-in-swift
func isValidEmail(_ email: String) -> Bool {

let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPred = NSPredicate(format: "SELF MATCHES %@", emailRegEx)
return emailPred.evaluate(with: email)
}
guard let searchString = textField.text, !searchString.isEmpty else { return }
if searchString.contains("@"), !isValidEmail(searchString) { return }
networking?.getSharees(searchString: searchString)
Expand Down Expand Up @@ -460,15 +452,16 @@ extension NCShare: UISearchBarDelegate {
}

@objc private func searchSharees(_ sender: Any?) {
// https://stackoverflow.com/questions/25471114/how-to-validate-an-e-mail-address-in-swift
func isValidEmail(_ email: String) -> Bool {

let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPred = NSPredicate(format: "SELF MATCHES %@", emailRegEx)
return emailPred.evaluate(with: email)
}
guard let searchString = searchField.text, !searchString.isEmpty else { return }
guard let searchString = searchField.text?.trimmingCharacters(in: .whitespacesAndNewlines), !searchString.isEmpty else { return }
if searchString.contains("@"), !isValidEmail(searchString) { return }
networking?.getSharees(searchString: searchString)
}
}

extension NCShare {
private func isValidEmail(_ email: String) -> Bool {
let emailRegEx = "^[\u{0021}-\u{007E}\\p{L}\\p{M}\\p{N}._%+\\-]+@([\\p{L}\\p{M}\\p{N}0-9\\-]+\\.)+[\\p{L}\\p{M}]{2,64}$" // Unicode regex allows for all unicode chars, ex. ß, ü, and more.
let emailPred = NSPredicate(format: "SELF MATCHES %@", emailRegEx)
return emailPred.evaluate(with: email)
}
}
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