import Foundation public enum LogRedactor {    private static let fallbackRegex: NSRegularExpression = {        do {            return try NSRegularExpression(pattern: "$^", options: [])        } catch {            fatalError("Failed to build fallback regex: \(error)")        }    }()     private static let emailRegex = Self.makeRegex(        pattern: #"[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}"#,        options: [.caseInsensitive])    private static let cookieHeaderRegex = Self.makeRegex(        pattern: #"(?i)(cookie\s*:\s*)([^\r\n]+)"#)    private static let authorizationRegex = Self.makeRegex(        pattern: #"(?i)(authorization\s*:\s*)([^\r\n]+)"#)    private static let bearerRegex = Self.makeRegex(        pattern: #"(?i)\bbearer\s+[a-z0-9._\-]+=*\b"#)     public static func redact(_ text: String) -> String {        var output = text        output = self.replace(self.emailRegex, in: output, with: "<redacted-email>")        output = self.replace(self.cookieHeaderRegex, in: output, with: "$1<redacted>")        output = self.replace(self.authorizationRegex, in: output, with: "$1<redacted>")        output = self.replace(self.bearerRegex, in: output, with: "Bearer <redacted>")        return output    }     private static func makeRegex(pattern: String, options: NSRegularExpression.Options = []) -> NSRegularExpression {        (try? NSRegularExpression(pattern: pattern, options: options)) ?? self.fallbackRegex    }     private static func replace(_ regex: NSRegularExpression, in text: String, with template: String) -> String {        let range = NSRange(text.startIndex..<text.endIndex, in: text)        return regex.stringByReplacingMatches(in: text, options: [], range: range, withTemplate: template)    }}