Allow delegate to handle invalid WPCom password error.

Author: jaclync

WordPressAuthenticator/Unified Auth/View Related/Get Started/GetStartedViewController.swift

@@ -13,6 +13,7 @@ public enum SignInSource {
 /// The error during the sign in flow.
 public enum SignInError: Error {
     case invalidWPComEmail(source: SignInSource)
+    case invalidWPComPassword(source: SignInSource)
 
     init?(error: Error, source: SignInSource?) {
         let error = error as NSError
@@ -520,6 +521,7 @@ private extension GetStartedViewController {
             return
         }
 
+        vc.source = source
         vc.loginFields = loginFields
         vc.trackAsPasswordChallenge = false
 

WordPressAuthenticator/Unified Auth/View Related/Password/PasswordViewController.swift

@@ -21,6 +21,8 @@ class PasswordViewController: LoginViewController {
     ///
     var trackAsPasswordChallenge = true
 
+    var source: SignInSource?
+
     override var loginFields: LoginFields {
         didSet {
             loginFields.password = ""
@@ -121,6 +123,15 @@ class PasswordViewController: LoginViewController {
         let errorCode = nsError.code
         let errorDomain = nsError.domain
 
+        if let source = source, loginFields.meta.userIsDotCom {
+            let passwordError = SignInError.invalidWPComPassword(source: source)
+            if authenticationDelegate.shouldHandleError(passwordError) {
+                authenticationDelegate.handleError(passwordError) { [weak self] _ in
+                    // No custom navigation is expected in this case.
+                }
+            }
+        }
+
         if errorDomain == WordPressComOAuthClient.WordPressComOAuthErrorDomain,
             errorCode == WordPressComOAuthError.invalidRequest.rawValue {