move shared utils to core auth package

Author: russellwheatley

FirebaseSwiftUI/FirebaseFacebookSwiftUI/Sources/Utils/FacebookUtils.swift renamed to FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Utils/CommonUtils.swift

@@ -2,8 +2,15 @@ import CommonCrypto
 import Foundation
 import Security
 
-class FacebookUtils {
-  static func randomNonce(length: Int = 32) -> String {
+public class CommonUtils {
+  static let emailRegex = ".+@([a-zA-Z0-9\\-]+\\.)+[a-zA-Z0-9]{2,63}"
+
+  public static func isValidEmail(_ email: String) -> Bool {
+    let emailPredicate = NSPredicate(format: "SELF MATCHES %@", emailRegex)
+    return emailPredicate.evaluate(with: email)
+  }
+
+  public static func randomNonce(length: Int = 32) -> String {
     let characterSet = "0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz-._"
     var result = ""
     var remainingLength = length
@@ -31,7 +38,7 @@ class FacebookUtils {
     return result
   }
 
-  static func sha256Hash(of input: String) -> String {
+  public static func sha256Hash(of input: String) -> String {
     guard let data = input.data(using: .utf8) else { return "" }
     var hash = [UInt8](repeating: 0, count: Int(CC_SHA256_DIGEST_LENGTH))
     data.withUnsafeBytes {

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Utils/EmailUtils.swift

@@ -40,7 +40,7 @@ extension EmailLinkView: View {
           .padding(.vertical, 8)
           .frame(maxWidth: .infinity)
       }
-      .disabled(!EmailUtils.isValidEmail(email))
+      .disabled(!CommonUtils.isValidEmail(email))
       .padding([.top, .bottom], 8)
       .frame(maxWidth: .infinity)
       .buttonStyle(.borderedProminent)

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/EmailLinkView.swift

@@ -38,7 +38,7 @@ extension PasswordRecoveryView: View {
           .padding(.vertical, 8)
           .frame(maxWidth: .infinity)
       }
-      .disabled(!EmailUtils.isValidEmail(email))
+      .disabled(!CommonUtils.isValidEmail(email))
       .padding([.top, .bottom], 8)
       .frame(maxWidth: .infinity)
       .buttonStyle(.borderedProminent)

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/PasswordRecoveryView.swift

@@ -30,8 +30,8 @@ public class FacebookProviderSwift: FacebookProviderProtocol {
 
   public init(scopes: [String]? = nil) {
     self.scopes = scopes ?? kDefaultFacebookScopes
-    rawNonce = FacebookUtils.randomNonce()
-    shaNonce = FacebookUtils.sha256Hash(of: rawNonce)
+    rawNonce = CommonUtils.randomNonce()
+    shaNonce = CommonUtils.sha256Hash(of: rawNonce)
   }
 
   @MainActor public func signInWithFacebook(isLimitedLogin: Bool) async throws -> AuthCredential {