Improved remote provisioning wrong url format error display

app/src/main/java/org/linphone/activities/assistant/fragments/RemoteProvisioningFragment.kt

@@ -20,7 +20,6 @@
 package org.linphone.activities.assistant.fragments
 
 import android.os.Bundle
-import android.util.Patterns
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -61,16 +60,6 @@ class RemoteProvisioningFragment : Fragment() {
         viewModel = ViewModelProvider(this).get(RemoteProvisioningViewModel::class.java)
         binding.viewModel = viewModel
 
-        binding.setApplyClickListener {
-            val url = viewModel.urlToFetch.value.orEmpty()
-            if (Patterns.WEB_URL.matcher(url).matches()) {
-                viewModel.fetchAndApply(url)
-            } else {
-                val activity = requireActivity() as AssistantActivity
-                activity.showSnackBar(R.string.assistant_remote_provisioning_wrong_format)
-            }
-        }
-
         binding.setQrCodeClickListener {
             if (findNavController().currentDestination?.id == R.id.remoteProvisioningFragment) {
                 findNavController().navigate(R.id.action_remoteProvisioningFragment_to_qrCodeFragment)

app/src/main/java/org/linphone/activities/assistant/viewmodels/RemoteProvisioningViewModel.kt

@@ -19,6 +19,7 @@
  */
 package org.linphone.activities.assistant.viewmodels
 
+import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import org.linphone.LinphoneApplication.Companion.coreContext
@@ -30,6 +31,9 @@ import org.linphone.utils.Event
 
 class RemoteProvisioningViewModel : ViewModel() {
     val urlToFetch = MutableLiveData<String>()
+    val urlError = MutableLiveData<String>()
+
+    val fetchEnabled: MediatorLiveData<Boolean> = MediatorLiveData()
     val fetchInProgress = MutableLiveData<Boolean>()
     val fetchSuccessfulEvent = MutableLiveData<Event<Boolean>>()
 
@@ -50,6 +54,14 @@ class RemoteProvisioningViewModel : ViewModel() {
     init {
         fetchInProgress.value = false
         coreContext.core.addListener(listener)
+
+        fetchEnabled.value = false
+        fetchEnabled.addSource(urlToFetch) {
+            fetchEnabled.value = isFetchEnabled()
+        }
+        fetchEnabled.addSource(urlError) {
+            fetchEnabled.value = isFetchEnabled()
+        }
     }
 
     override fun onCleared() {
@@ -57,11 +69,16 @@ class RemoteProvisioningViewModel : ViewModel() {
         super.onCleared()
     }
 
-    fun fetchAndApply(url: String) {
+    fun fetchAndApply() {
+        val url = urlToFetch.value.orEmpty()
         coreContext.core.provisioningUri = url
         Log.w("[Remote Provisioning] Url set to [$url], restarting Core")
         fetchInProgress.value = true
         coreContext.core.stop()
         coreContext.core.start()
     }
+
+    private fun isFetchEnabled(): Boolean {
+        return urlToFetch.value.orEmpty().isNotEmpty() && urlError.value.orEmpty().isEmpty()
+    }
 }

app/src/main/java/org/linphone/utils/DataBindingUtils.kt

@@ -368,6 +368,22 @@ fun addEmailEditTextValidation(editText: EditText, enabled: Boolean) {
     })
 }
 
+@BindingAdapter("urlConfirmationValidation")
+fun addUrlEditTextValidation(editText: EditText, enabled: Boolean) {
+    if (!enabled) return
+    editText.addTextChangedListener(object : TextWatcher {
+        override fun afterTextChanged(s: Editable?) { }
+
+        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) { }
+
+        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+            if (!Patterns.WEB_URL.matcher(s).matches()) {
+                editText.error = editText.context.getString(R.string.assistant_remote_provisioning_wrong_format)
+            }
+        }
+    })
+}
+
 @BindingAdapter("passwordConfirmationValidation")
 fun addPasswordConfirmationEditTextValidation(password: EditText, passwordConfirmation: EditText) {
     password.addTextChangedListener(object : TextWatcher {

app/src/main/res/layout/assistant_remote_provisioning_fragment.xml

@@ -5,9 +5,6 @@
 
     <data>
         <import type="android.view.View"/>
-        <variable
-            name="applyClickListener"
-            type="android.view.View.OnClickListener"/>
         <variable
             name="qrCodeClickListener"
             type="android.view.View.OnClickListener"/>
@@ -68,6 +65,8 @@
                     android:layout_height="wrap_content"/>
 
                 <EditText
+                    errorMessage="@={viewModel.urlError}"
+                    urlConfirmationValidation="@{true}"
                     android:text="@={viewModel.urlToFetch}"
                     android:background="@drawable/resizable_text_field"
                     android:textColor="@color/black_color"
@@ -78,8 +77,8 @@
                     android:maxLines="1"/>
 
                 <TextView
-                    android:onClick="@{applyClickListener}"
+                    android:onClick="@{() -> viewModel.fetchAndApply()}"
-                    android:enabled="@{viewModel.urlToFetch.length() > 0}"
+                    android:enabled="@{viewModel.fetchEnabled}"
                     android:text="@string/assistant_fetch_apply"
                     android:background="@drawable/assistant_button"
                     android:textColor="@drawable/assistant_button_text_color"