New config to skip XMLRPC check for site discovery

Author: itsmeichigo

WordPressAuthenticator/Authenticator/WordPressAuthenticatorConfiguration.swift

@@ -132,6 +132,10 @@ public struct WordPressAuthenticatorConfiguration {
     ///
     let wpcomPasswordInstructions: String?
 
+    /// If enabled, site discovery will not check for XMLRPC URL.
+    ///
+    let skipXMLRPCCheckForSiteDiscovery: Bool
+
     /// Designated Initializer
     ///
     public init (wpcomClientId: String,
@@ -161,7 +165,8 @@ public struct WordPressAuthenticatorConfiguration {
                  enableSiteCreation: Bool = false,
                  enableSocialLogin: Bool = false,
                  emphasizeEmailForWPComPassword: Bool = false,
-                 wpcomPasswordInstructions: String? = nil) {
+                 wpcomPasswordInstructions: String? = nil,
+                 skipXMLRPCCheckForSiteDiscovery: Bool = false) {
 
         self.wpcomClientId = wpcomClientId
         self.wpcomSecret = wpcomSecret
@@ -191,5 +196,6 @@ public struct WordPressAuthenticatorConfiguration {
         self.enableSocialLogin = enableSocialLogin
         self.emphasizeEmailForWPComPassword = emphasizeEmailForWPComPassword
         self.wpcomPasswordInstructions = wpcomPasswordInstructions
+        self.skipXMLRPCCheckForSiteDiscovery = skipXMLRPCCheckForSiteDiscovery
     }
 }

WordPressAuthenticator/Unified Auth/View Related/Site Address/SiteAddressViewController.swift

@@ -31,6 +31,7 @@ final class SiteAddressViewController: LoginViewController {
     /// Whether the protocol method `troubleshootSite` should be triggered after site info is fetched.
     ///
     private let isSiteDiscovery: Bool
+    private let configuration = WordPressAuthenticator.shared.configuration
 
     init?(isSiteDiscovery: Bool, coder: NSCoder) {
         self.isSiteDiscovery = isSiteDiscovery
@@ -442,6 +443,11 @@ private extension SiteAddressViewController {
         // Checks that the site exists
         checkSiteExistence(url: url) { [weak self] in
             guard let self = self else { return }
+            // skips XMLRPC check for site discovery if needed
+            if self.isSiteDiscovery && self.configuration.skipXMLRPCCheckForSiteDiscovery {
+                self.fetchSiteInfo()
+                return
+            }
             // Proceeds to check for the site's WordPress
             self.guessXMLRPCURL(for: self.loginFields.siteAddress)
         }