adds 8 character predicate for registering passwords

- removes confusing extension in favour of splitting the error resets and submit enabled states

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

@@ -46,6 +46,7 @@ fun TextInputLayout.hasContent() = !editText().text.isNullOrEmpty()
 fun TextInputLayout.clearErrorOnChange(lifecycleOwner: LifecycleOwner) {
     onTextChange(lifecycleOwner) {
         error = null
+        isErrorEnabled = false
     }
 }
 

vector/src/main/java/im/vector/app/features/onboarding/ftueauth/FtueAuthCombinedLoginFragment.kt

@@ -25,6 +25,7 @@ import androidx.autofill.HintConstants
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
 import im.vector.app.R
+import im.vector.app.core.extensions.clearErrorOnChange
 import im.vector.app.core.extensions.content
 import im.vector.app.core.extensions.editText
 import im.vector.app.core.extensions.hideKeyboard
@@ -41,8 +42,10 @@ import im.vector.app.features.login.render
 import im.vector.app.features.onboarding.OnboardingAction
 import im.vector.app.features.onboarding.OnboardingViewEvents
 import im.vector.app.features.onboarding.OnboardingViewState
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.launchIn
 import org.matrix.android.sdk.api.auth.data.SsoIdentityProvider
+import reactivecircus.flowbinding.android.widget.textChanges
 import javax.inject.Inject
 
 class FtueAuthCombinedLoginFragment @Inject constructor(
@@ -66,8 +69,12 @@ class FtueAuthCombinedLoginFragment @Inject constructor(
 
     private fun setupSubmitButton() {
         views.loginSubmit.setOnClickListener { submit() }
-        observeContentChangesAndResetErrors(views.loginInput, views.loginPasswordInput, views.loginSubmit)
-                .launchIn(viewLifecycleOwner.lifecycleScope)
+        views.loginInput.clearErrorOnChange(viewLifecycleOwner)
+        views.loginPasswordInput.clearErrorOnChange(viewLifecycleOwner)
+
+        combine(views.loginInput.editText().textChanges(), views.loginPasswordInput.editText().textChanges()) { account, password ->
+            views.loginSubmit.isEnabled = account.isNotEmpty() && password.isNotEmpty()
+        }.launchIn(viewLifecycleOwner.lifecycleScope)
     }
 
     private fun submit() {

vector/src/main/java/im/vector/app/features/onboarding/ftueauth/FtueAuthCombinedRegisterFragment.kt

@@ -28,6 +28,7 @@ import androidx.lifecycle.lifecycleScope
 import com.airbnb.mvrx.withState
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import im.vector.app.R
+import im.vector.app.core.extensions.clearErrorOnChange
 import im.vector.app.core.extensions.content
 import im.vector.app.core.extensions.editText
 import im.vector.app.core.extensions.hasSurroundingSpaces
@@ -48,8 +49,8 @@ import im.vector.app.features.onboarding.OnboardingAction
 import im.vector.app.features.onboarding.OnboardingAction.AuthenticateAction
 import im.vector.app.features.onboarding.OnboardingViewEvents
 import im.vector.app.features.onboarding.OnboardingViewState
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import org.matrix.android.sdk.api.auth.data.SsoIdentityProvider
 import org.matrix.android.sdk.api.failure.isHomeserverUnavailable
 import org.matrix.android.sdk.api.failure.isInvalidPassword
@@ -61,6 +62,8 @@ import org.matrix.android.sdk.api.failure.isWeakPassword
 import reactivecircus.flowbinding.android.widget.textChanges
 import javax.inject.Inject
 
+private const val MINIMUM_PASSWORD_LENGTH = 8
+
 class FtueAuthCombinedRegisterFragment @Inject constructor() : AbstractSSOFtueAuthFragment<FragmentFtueCombinedRegisterBinding>() {
 
     override fun getBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentFtueCombinedRegisterBinding {
@@ -86,8 +89,14 @@ class FtueAuthCombinedRegisterFragment @Inject constructor() : AbstractSSOFtueAu
 
     private fun setupSubmitButton() {
         views.createAccountSubmit.setOnClickListener { submit() }
-        observeContentChangesAndResetErrors(views.createAccountInput, views.createAccountPasswordInput, views.createAccountSubmit)
-                .launchIn(viewLifecycleOwner.lifecycleScope)
+        views.createAccountInput.clearErrorOnChange(viewLifecycleOwner)
+        views.createAccountPasswordInput.clearErrorOnChange(viewLifecycleOwner)
+
+        combine(views.createAccountInput.editText().textChanges(), views.createAccountPasswordInput.editText().textChanges()) { account, password ->
+            val accountIsValid = account.isNotEmpty()
+            val passwordIsValid = password.length >= MINIMUM_PASSWORD_LENGTH
+            views.createAccountSubmit.isEnabled = accountIsValid && passwordIsValid
+        }.launchIn(viewLifecycleOwner.lifecycleScope)
     }
 
     private fun submit() {

vector/src/main/java/im/vector/app/features/onboarding/ftueauth/FtueExtensions.kt

@@ -16,16 +16,10 @@
 
 package im.vector.app.features.onboarding.ftueauth
 
-import android.widget.Button
-import com.google.android.material.textfield.TextInputLayout
 import im.vector.app.R
-import im.vector.app.core.extensions.hasContentFlow
 import im.vector.app.features.login.SignMode
 import im.vector.app.features.onboarding.OnboardingAction
 import im.vector.app.features.themes.ThemeProvider
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.combine
-import kotlinx.coroutines.flow.onEach
 
 fun SignMode.toAuthenticateAction(login: String, password: String, initialDeviceName: String): OnboardingAction.AuthenticateAction {
     return when (this) {
@@ -36,24 +30,6 @@ fun SignMode.toAuthenticateAction(login: String, password: String, initialDevice
     }
 }
 
-/**
- * A flow to monitor content changes from both username/id and password fields,
- * clearing errors and enabling/disabling the submission button on non empty content changes.
- */
-fun observeContentChangesAndResetErrors(username: TextInputLayout, password: TextInputLayout, submit: Button): Flow<*> {
-    return combine(
-            username.hasContentFlow { it.trim() },
-            password.hasContentFlow(),
-            transform = { usernameHasContent, passwordHasContent -> usernameHasContent && passwordHasContent }
-    ).onEach {
-        username.error = null
-        username.isErrorEnabled = false
-        password.error = null
-        username.isErrorEnabled = false
-        submit.isEnabled = it
-    }
-}
-
 fun ThemeProvider.ftueBreakerBackground() = when (isLightTheme()) {
     true  -> R.drawable.bg_gradient_ftue_breaker
     false -> R.drawable.bg_color_background