Other way of observing form state

features/login/src/main/java/io/element/android/x/features/login/LoginScreen.kt

@@ -28,7 +28,6 @@ import com.airbnb.mvrx.Loading
 import com.airbnb.mvrx.Success
 import com.airbnb.mvrx.compose.collectAsState
 import com.airbnb.mvrx.compose.mavericksViewModel
-import io.element.android.x.core.compose.textFieldState
 import io.element.android.x.designsystem.ElementXTheme
 import timber.log.Timber
 
@@ -39,12 +38,14 @@ fun LoginScreen(
     onLoginWithSuccess: () -> Unit = { },
 ) {
     val state: LoginViewState by viewModel.collectAsState()
+    val formState: LoginFormState by viewModel.formState
     LaunchedEffect(key1 = Unit) {
         Timber.d("resume")
         viewModel.onResume()
     }
     LoginContent(
         state = state,
+        formState = formState,
         onChangeServer = onChangeServer,
         onLoginChanged = viewModel::onSetName,
         onPasswordChanged = viewModel::onSetPassword,
@@ -58,6 +59,7 @@ fun LoginScreen(
 @Composable
 fun LoginContent(
     state: LoginViewState,
+    formState: LoginFormState,
     onChangeServer: () -> Unit = {},
     onLoginChanged: (String) -> Unit = {},
     onPasswordChanged: (String) -> Unit = {},
@@ -117,39 +119,31 @@ fun LoginContent(
                             }
                         )
                     }
-                    var login by textFieldState(state.login)
                     OutlinedTextField(
-                        value = login,
+                        value = formState.login,
                         modifier = Modifier
                             .fillMaxWidth()
                             .padding(top = 60.dp),
                         label = {
                             Text(text = "Email or username")
                         },
-                        onValueChange = {
-                            login = it
-                            onLoginChanged(it)
-                        },
+                        onValueChange = onLoginChanged,
                         keyboardOptions = KeyboardOptions(
                             keyboardType = KeyboardType.Email,
                             imeAction = ImeAction.Next
                         ),
                     )
                     var passwordVisible by remember { mutableStateOf(false) }
-                    var password by textFieldState(state.password)
                     if (state.isLoggedIn is Loading) {
                         // Ensure password is hidden when user submits the form
                         passwordVisible = false
                     }
                     OutlinedTextField(
-                        value = password,
+                        value = formState.password,
                         modifier = Modifier
                             .fillMaxWidth()
                             .padding(top = 24.dp),
-                        onValueChange = {
-                            password = it
-                            onPasswordChanged(it)
-                        },
+                        onValueChange = onPasswordChanged,
                         label = {
                             Text(text = "Password")
                         },
@@ -213,6 +207,7 @@ private fun LoginContentPreview() {
             state = LoginViewState(
                 homeserver = "matrix.org",
             ),
+            formState = LoginFormState("", "")
         )
     }
 }

features/login/src/main/java/io/element/android/x/features/login/LoginViewModel.kt

@@ -1,14 +1,26 @@
 package io.element.android.x.features.login
 
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.snapshotFlow
 import com.airbnb.mvrx.MavericksViewModel
-import com.airbnb.mvrx.Uninitialized
 import io.element.android.x.matrix.MatrixInstance
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 
 class LoginViewModel(initialState: LoginViewState) :
     MavericksViewModel<LoginViewState>(initialState) {
 
     private val matrix = MatrixInstance.getInstance()
+    var formState = mutableStateOf(LoginFormState.Default)
+        private set
+
+    init {
+        snapshotFlow { formState.value }
+            .onEach {
+                setState { copy(formState = it) }
+            }.launchIn(viewModelScope)
+    }
 
     fun onResume() {
         val currentHomeserver = matrix.getHomeserverOrDefault()
@@ -25,7 +37,7 @@ class LoginViewModel(initialState: LoginViewState) :
                 val state = awaitState()
                 // Ensure the server is provided to the Rust SDK
                 matrix.setHomeserver(state.homeserver)
-                matrix.login(state.login.trim(), state.password.trim())
+                matrix.login(state.formState.login.trim(), state.formState.password.trim())
                 matrix.activeClient().startSync()
             }.execute {
                 copy(isLoggedIn = it)
@@ -34,20 +46,10 @@ class LoginViewModel(initialState: LoginViewState) :
     }
 
     fun onSetPassword(password: String) {
-        setState {
-            copy(
-                password = password,
-                isLoggedIn = Uninitialized,
-            )
-        }
+        formState.value = formState.value.copy(password = password)
     }
 
     fun onSetName(name: String) {
-        setState {
-            copy(
-                login = name,
-                isLoggedIn = Uninitialized,
-            )
-        }
+        formState.value = formState.value.copy(login = name)
     }
 }

features/login/src/main/java/io/element/android/x/features/login/LoginViewState.kt

@@ -7,9 +7,20 @@ import com.airbnb.mvrx.Uninitialized
 
 data class LoginViewState(
     val homeserver: String = "",
-    val login: String = "",
-    val password: String = "",
     val isLoggedIn: Async<Unit> = Uninitialized,
+    val formState: LoginFormState = LoginFormState.Default,
 ) : MavericksState {
-    val submitEnabled = login.isNotEmpty() && password.isNotEmpty() && isLoggedIn !is Loading
+    val submitEnabled =
+        formState.login.isNotEmpty() && formState.password.isNotEmpty() && isLoggedIn !is Loading
 }
+
+data class LoginFormState(
+    val login: String,
+    val password: String
+) {
+
+    companion object {
+        val Default = LoginFormState("", "")
+    }
+
+}