Using /register/available also fixes #1410

(See https://github.com/matrix-org/synapse/pull/7625)

CHANGES.md

@@ -6,7 +6,7 @@ Features ✨:
 
 Improvements 🙌:
  - Add ability to install APK from directly from Element (#2381)
- - Improve login/register flow (#2585, #3172)
+ - Improve login/register flow (#1410, #2585, #3172)
 
 Bugfix 🐛:
  - Message states cosmetic changes (#3007)

vector/src/main/java/im/vector/app/features/login2/LoginFragmentSignupUsername2.kt

@@ -42,10 +42,6 @@ import javax.inject.Inject
  */
 class LoginFragmentSignupUsername2 @Inject constructor() : AbstractSSOLoginFragment2<FragmentLoginSignupUsername2Binding>() {
 
-    // Temporary patch for https://github.com/vector-im/riotX-android/issues/1410,
-    // waiting for https://github.com/matrix-org/synapse/issues/7576
-    private var isNumericOnlyUserIdForbidden = false
-
     override fun getBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentLoginSignupUsername2Binding {
         return FragmentLoginSignupUsername2Binding.inflate(inflater, container, false)
     }
@@ -79,10 +75,6 @@ class LoginFragmentSignupUsername2 @Inject constructor() : AbstractSSOLoginFragm
             views.loginFieldTil.error = getString(R.string.error_empty_field_choose_user_name)
             error++
         }
-        if (isNumericOnlyUserIdForbidden && login.isDigitsOnly()) {
-            views.loginFieldTil.error = "The homeserver does not accept username with only digits."
-            error++
-        }
 
         if (error == 0) {
             loginViewModel.handle(LoginAction2.SetUserName(login))
@@ -138,8 +130,6 @@ class LoginFragmentSignupUsername2 @Inject constructor() : AbstractSSOLoginFragm
 
     @SuppressLint("SetTextI18n")
     override fun updateWithState(state: LoginViewState2) {
-        isNumericOnlyUserIdForbidden = state.isNumericOnlyUserIdForbidden
-
         setupUi(state)
     }
 }

vector/src/main/java/im/vector/app/features/login2/LoginFragmentToAny2.kt

@@ -51,10 +51,6 @@ class LoginFragmentToAny2 @Inject constructor() : AbstractSSOLoginFragment2<Frag
 
     private var passwordShown = false
 
-    // Temporary patch for https://github.com/vector-im/riotX-android/issues/1410,
-    // waiting for https://github.com/matrix-org/synapse/issues/7576
-    private var isNumericOnlyUserIdForbidden = false
-
     override fun getBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentLoginSigninToAny2Binding {
         return FragmentLoginSigninToAny2Binding.inflate(inflater, container, false)
     }
@@ -104,10 +100,6 @@ class LoginFragmentToAny2 @Inject constructor() : AbstractSSOLoginFragment2<Frag
             views.loginFieldTil.error = getString(R.string.error_empty_field_enter_user_name)
             error++
         }
-        if (isNumericOnlyUserIdForbidden && login.isDigitsOnly()) {
-            views.loginFieldTil.error = "The homeserver does not accept username with only digits."
-            error++
-        }
         if (password.isEmpty()) {
             views.passwordFieldTil.error = getString(R.string.error_empty_field_your_password)
             error++
@@ -213,8 +205,6 @@ class LoginFragmentToAny2 @Inject constructor() : AbstractSSOLoginFragment2<Frag
     }
 
     override fun updateWithState(state: LoginViewState2) {
-        isNumericOnlyUserIdForbidden = state.isNumericOnlyUserIdForbidden
-
         setupUi(state)
 
         if (state.isLoading) {

vector/src/main/java/im/vector/app/features/login2/LoginViewModel2.kt

@@ -224,7 +224,6 @@ class LoginViewModel2 @AssistedInject constructor(
                     loginMode = LoginMode.Sso(action.ssoIdentityProviders),
                     homeServerUrlFromUser = action.homeServerUrl,
                     homeServerUrl = action.homeServerUrl,
-                    isNumericOnlyUserIdForbidden = action.homeServerUrl == matrixOrgUrl,
                     deviceId = action.deviceId
             )
         }
@@ -662,7 +661,6 @@ class LoginViewModel2 @AssistedInject constructor(
                     isLoading = false,
                     homeServerUrlFromUser = urlFromUser,
                     homeServerUrl = data.homeServerUrl,
-                    isNumericOnlyUserIdForbidden = urlFromUser == matrixOrgUrl,
                     loginMode = loginMode
             )
         }
@@ -818,7 +816,6 @@ class LoginViewModel2 @AssistedInject constructor(
                         isLoading = false,
                         homeServerUrlFromUser = homeServerConnectionConfig.homeServerUri.toString(),
                         homeServerUrl = data.homeServerUrl,
-                        isNumericOnlyUserIdForbidden = homeServerConnectionConfig.homeServerUri.toString() == matrixOrgUrl,
                         loginMode = loginMode
                 )
             }

vector/src/main/java/im/vector/app/features/login2/LoginViewState2.kt

@@ -49,9 +49,6 @@ data class LoginViewState2(
         // Network result
         val loginProfileInfo: Async<LoginProfileInfo> = Uninitialized,
 
-        // True on Matrix.org
-        val isNumericOnlyUserIdForbidden: Boolean = false,
-
         // Network result
         @PersistState
         val loginMode: LoginMode = LoginMode.Unknown,