Allow using an outdated homeserver, at user's risk (#1972)

Just warn the user using a non blocking popup

CHANGES.md

@@ -9,6 +9,7 @@ Improvements 🙌:
  - Visually disable call buttons in menu and prohibit calling when permissions are insufficient (#2112)
  - Add a setting to show timestamp for all messages (#2123)
  - Use cache for user color
+ - Allow using an outdated homeserver, at user's risk (#1972)
 
 Bugfix 🐛:
  - Long message cannot be sent/takes infinite time & blocks other messages #1397

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/auth/data/LoginFlowResult.kt

@@ -17,13 +17,11 @@
 
 package org.matrix.android.sdk.api.auth.data
 
-// Either a list of supported login types, or an error if the homeserver is outdated
 sealed class LoginFlowResult {
     data class Success(
             val supportedLoginTypes: List<String>,
             val isLoginAndRegistrationSupported: Boolean,
-            val homeServerUrl: String
+            val homeServerUrl: String,
+            val isOutdatedHomeserver: Boolean
     ) : LoginFlowResult()
-
-    object OutdatedHomeserver : LoginFlowResult()
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/auth/DefaultAuthenticationService.kt

@@ -273,16 +273,16 @@ internal class DefaultAuthenticationService @Inject constructor(
     }
 
     private suspend fun getLoginFlowResult(authAPI: AuthAPI, versions: Versions, homeServerUrl: String): LoginFlowResult {
-        return if (versions.isSupportedBySdk()) {
         // Get the login flow
         val loginFlowResponse = executeRequest<LoginFlowResponse>(null) {
             apiCall = authAPI.getLoginFlows()
         }
-            LoginFlowResult.Success(loginFlowResponse.flows.orEmpty().mapNotNull { it.type }, versions.isLoginAndRegistrationSupportedBySdk(), homeServerUrl)
+        return LoginFlowResult.Success(
-        } else {
+                loginFlowResponse.flows.orEmpty().mapNotNull { it.type },
-            // Not supported
+                versions.isLoginAndRegistrationSupportedBySdk(),
-            LoginFlowResult.OutdatedHomeserver
+                homeServerUrl,
-        }
+                !versions.isSupportedBySdk()
+        )
     }
 
     override fun getRegistrationWizard(): RegistrationWizard {

vector/src/main/java/im/vector/app/features/login/LoginActivity.kt

@@ -42,10 +42,10 @@ import im.vector.app.features.login.terms.LoginTermsFragment
 import im.vector.app.features.login.terms.LoginTermsFragmentArgument
 import im.vector.app.features.login.terms.toLocalizedLoginTerms
 import im.vector.app.features.pin.UnlockedActivity
+import kotlinx.android.synthetic.main.activity_login.*
 import org.matrix.android.sdk.api.auth.registration.FlowResult
 import org.matrix.android.sdk.api.auth.registration.Stage
 import org.matrix.android.sdk.api.extensions.tryOrNull
-import kotlinx.android.synthetic.main.activity_login.*
 import javax.inject.Inject
 
 /**
@@ -127,7 +127,7 @@ open class LoginActivity : VectorBaseActivity(), ToolbarConfigurable, UnlockedAc
             is LoginViewEvents.OutdatedHomeserver                         -> {
                 AlertDialog.Builder(this)
                         .setTitle(R.string.login_error_outdated_homeserver_title)
-                        .setMessage(R.string.login_error_outdated_homeserver_content)
+                        .setMessage(R.string.login_error_outdated_homeserver_warning_content)
                         .setPositiveButton(R.string.ok, null)
                         .show()
                 Unit

vector/src/main/java/im/vector/app/features/login/LoginViewModel.kt

@@ -748,9 +748,6 @@ class LoginViewModel @AssistedInject constructor(
                             else                                                       -> LoginMode.Unsupported
                         }
 
-                        if (loginMode == LoginMode.Password && !data.isLoginAndRegistrationSupported) {
-                            notSupported()
-                        } else {
                         // FIXME We should post a view event here normally?
                         setState {
                             copy(
@@ -760,22 +757,12 @@ class LoginViewModel @AssistedInject constructor(
                                     loginModeSupportedTypes = data.supportedLoginTypes.toList()
                             )
                         }
-                        }
+                        if ((loginMode == LoginMode.Password && !data.isLoginAndRegistrationSupported)
-                    }
+                                || data.isOutdatedHomeserver) {
-                    is LoginFlowResult.OutdatedHomeserver -> {
-                        notSupported()
-                    }
-                }
-            }
-
-            private fun notSupported() {
                             // Notify the UI
                             _viewEvents.post(LoginViewEvents.OutdatedHomeserver)
-
+                        }
-                setState {
+                    }
-                    copy(
-                            asyncHomeServerLoginFlowRequest = Uninitialized
-                    )
                 }
             }
         })

vector/src/main/java/im/vector/app/features/signout/soft/SoftLogoutViewModel.kt

@@ -25,16 +25,16 @@ import com.airbnb.mvrx.Uninitialized
 import com.airbnb.mvrx.ViewModelContext
 import com.squareup.inject.assisted.Assisted
 import com.squareup.inject.assisted.AssistedInject
+import im.vector.app.core.di.ActiveSessionHolder
+import im.vector.app.core.extensions.hasUnsavedKeys
+import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.features.login.LoginMode
 import org.matrix.android.sdk.api.MatrixCallback
 import org.matrix.android.sdk.api.auth.AuthenticationService
 import org.matrix.android.sdk.api.auth.data.LoginFlowResult
 import org.matrix.android.sdk.api.auth.data.LoginFlowTypes
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.util.Cancelable
-import im.vector.app.core.di.ActiveSessionHolder
-import im.vector.app.core.extensions.hasUnsavedKeys
-import im.vector.app.core.platform.VectorViewModel
-import im.vector.app.features.login.LoginMode
 import timber.log.Timber
 
 /**
@@ -110,9 +110,6 @@ class SoftLogoutViewModel @AssistedInject constructor(
                             else                                                       -> LoginMode.Unsupported
                         }
 
-                        if (loginMode == LoginMode.Password && !data.isLoginAndRegistrationSupported) {
-                            notSupported()
-                        } else {
                         setState {
                             copy(
                                     asyncHomeServerLoginFlowRequest = Success(loginMode)
@@ -120,20 +117,6 @@ class SoftLogoutViewModel @AssistedInject constructor(
                         }
                     }
                 }
-                    is LoginFlowResult.OutdatedHomeserver -> {
-                        notSupported()
-                    }
-                }
-            }
-
-            private fun notSupported() {
-                // Should not happen since it's a re-logout
-                // Notify the UI
-                setState {
-                    copy(
-                            asyncHomeServerLoginFlowRequest = Fail(IllegalStateException("Should not happen"))
-                    )
-                }
             }
         })
     }

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

@@ -1988,6 +1988,7 @@
     <string name="login_validation_code_is_not_correct">The entered code is not correct. Please check.</string>
     <string name="login_error_outdated_homeserver_title">Outdated homeserver</string>
     <string name="login_error_outdated_homeserver_content">This homeserver is running too old a version to connect to. Ask your homeserver admin to upgrade.</string>
+    <string name="login_error_outdated_homeserver_warning_content">This homeserver is running an old version. Ask your homeserver admin to upgrade. You can continue, but some features may not work correctly.</string>
 
     <plurals name="login_error_limit_exceeded_retry_after">
         <item quantity="one">Too many requests have been sent. You can retry in %1$d second…</item>