Login UX flow: warning if no profile can ba found

vector/src/main/java/im/vector/app/core/extensions/MvRxExtension.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2021 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.core.extensions
+
+import com.airbnb.mvrx.Async
+import com.airbnb.mvrx.Fail
+import com.airbnb.mvrx.Success
+
+/**
+ * It maybe already exist somewhere but I cannot find it
+ */
+suspend fun <T> tryAsync(block: suspend () -> T): Async<T> {
+    return try {
+        Success(block.invoke())
+    } catch (failure: Throwable) {
+        Fail(failure)
+    }
+}

vector/src/main/java/im/vector/app/features/login2/LoginFragment2SigninPassword.kt

@@ -23,6 +23,8 @@ import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import androidx.autofill.HintConstants
+import androidx.core.view.isVisible
+import com.airbnb.mvrx.Fail
 import com.jakewharton.rxbinding3.widget.textChanges
 import im.vector.app.R
 import im.vector.app.core.extensions.hideKeyboard
@@ -31,8 +33,10 @@ import im.vector.app.databinding.FragmentLogin2SigninPasswordBinding
 import im.vector.app.features.home.AvatarRenderer
 import io.reactivex.rxkotlin.subscribeBy
 import org.matrix.android.sdk.api.auth.login.LoginProfileInfo
+import org.matrix.android.sdk.api.failure.Failure
 import org.matrix.android.sdk.api.failure.isInvalidPassword
 import javax.inject.Inject
+import javax.net.ssl.HttpsURLConnection
 
 /**
  * In this screen:
@@ -103,13 +107,17 @@ class LoginFragment2SigninPassword @Inject constructor(
         // Name and avatar
         views.loginWelcomeBack.text = getString(
                 R.string.login_welcome_back,
-                state.loginProfileInfo?.displayName?.takeIf { it.isNotBlank() } ?: state.userIdentifier()
+                state.loginProfileInfo()?.displayName?.takeIf { it.isNotBlank() } ?: state.userIdentifier()
         )
 
         avatarRenderer.render(
-                profileInfo = state.loginProfileInfo ?: LoginProfileInfo(state.userIdentifier(), null, null),
+                profileInfo = state.loginProfileInfo() ?: LoginProfileInfo(state.userIdentifier(), null, null),
                 imageView = views.loginUserIcon
         )
+
+        views.loginWelcomeBackWarning.isVisible = ((state.loginProfileInfo as? Fail)
+                ?.error as? Failure.ServerError)
+                ?.httpCode == HttpsURLConnection.HTTP_NOT_FOUND /* 404 */
     }
 
     private fun setupSubmitButton() {

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

@@ -21,6 +21,7 @@ import android.net.Uri
 import androidx.fragment.app.FragmentActivity
 import androidx.lifecycle.viewModelScope
 import com.airbnb.mvrx.ActivityViewModelContext
+import com.airbnb.mvrx.Loading
 import com.airbnb.mvrx.MvRxViewModelFactory
 import com.airbnb.mvrx.ViewModelContext
 import dagger.assisted.Assisted
@@ -30,6 +31,7 @@ import im.vector.app.R
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.extensions.configureAndStart
 import im.vector.app.core.extensions.exhaustive
+import im.vector.app.core.extensions.tryAsync
 import im.vector.app.core.platform.VectorViewModel
 import im.vector.app.core.resources.StringProvider
 import im.vector.app.core.utils.ensureTrailingSlash
@@ -665,17 +667,11 @@ class LoginViewModel2 @AssistedInject constructor(
         val safeLoginWizard = loginWizard
 
         if (safeLoginWizard != null) {
-            try {
+            setState { copy(loginProfileInfo = Loading()) }
-                val info = safeLoginWizard.getProfileInfo(username)
+            val result = tryAsync {
-                setState {
+               safeLoginWizard.getProfileInfo(username)
-                    copy(
-                            loginProfileInfo = info
-                    )
-                }
-            } catch (failure: Throwable) {
-                // Ignore error
-                // TODO 404 may indicates that the user does not exist, so there is a mistake in the id
             }
+            setState { copy(loginProfileInfo = result) }
         }
     }
 

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

@@ -16,8 +16,10 @@
 
 package im.vector.app.features.login2
 
+import com.airbnb.mvrx.Async
 import com.airbnb.mvrx.MvRxState
 import com.airbnb.mvrx.PersistState
+import com.airbnb.mvrx.Uninitialized
 import im.vector.app.core.extensions.toReducedUrl
 import im.vector.app.features.login.LoginMode
 import org.matrix.android.sdk.api.MatrixPatterns
@@ -45,7 +47,7 @@ data class LoginViewState2(
         val deviceId: String? = null,
 
         // Network result
-        val loginProfileInfo: LoginProfileInfo? = null,
+        val loginProfileInfo: Async<LoginProfileInfo> = Uninitialized,
 
         // True on Matrix.org
         val isNumericOnlyUserIdForbidden: Boolean = false,

vector/src/main/res/layout/fragment_login_2_signin_password.xml

@@ -31,6 +31,17 @@
                 android:textAppearance="@style/TextAppearance.Vector.Login.Text"
                 tools:text="Welcome back user!" />
 
+            <TextView
+                android:id="@+id/loginWelcomeBackWarning"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/layout_vertical_margin"
+                android:text="@string/login_unknown_user_warning"
+                android:textAppearance="@style/TextAppearance.Vector.Login.Text"
+                android:textColor="@color/vector_warning_color_2"
+                android:visibility="gone"
+                tools:visibility="visible" />
+
             <TextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"

vector/src/main/res/values/colors.xml

@@ -4,6 +4,7 @@
     <!-- Error colors -->
     <color name="vector_success_color">#70BF56</color>
     <color name="vector_warning_color">#ff4b55</color>
+    <color name="vector_warning_color_2">#ff812d</color>
     <color name="vector_error_color">#ff4b55</color>
     <color name="vector_info_color">#2f9edb</color>
 

vector/src/main/res/values/strings_login_v2.xml

@@ -25,6 +25,8 @@
     <string name="login_create_a_new_account">Create a new account</string>
     <string name="login_i_already_have_an_account">I already have an account</string>
 
+    <string name="login_unknown_user_warning">Warning: no profile information can be retrieved with this Matrix identifier. Please check that there is no mistake.</string>
+
     <string name="login_wait_for_email_notice_2">We just sent an email to %1$s.</string>
     <string name="login_wait_for_email_help">Click on the link it contains to continue the account creation.</string>
     <string name="login_account_created_title">Congratulations!</string>