Add text watcher to dynamically change phone number input type

app/src/main/kotlin/org/vinaygopinath/launchchat/helpers/TextHelper.kt

@@ -0,0 +1,10 @@
+package org.vinaygopinath.launchchat.helpers
+
+object TextHelper {
+
+    private val phoneNumberRegex = Regex("^[+]?[(]?[0-9]{1,4}[)]?[-\\s./0-9]*$")
+
+    fun doesTextMatchPhoneNumberRegex(text: String): Boolean {
+        return phoneNumberRegex.matches(text)
+    }
+}

app/src/main/kotlin/org/vinaygopinath/launchchat/screens/main/MainActivity.kt

@@ -3,6 +3,7 @@ package org.vinaygopinath.launchchat.screens.main
 import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.os.Bundle
+import android.text.InputType
 import android.view.Menu
 import android.view.MenuItem
 import android.widget.ArrayAdapter
@@ -15,6 +16,7 @@ import androidx.annotation.StringRes
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.isVisible
+import androidx.core.widget.addTextChangedListener
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
@@ -32,6 +34,7 @@ import org.vinaygopinath.launchchat.helpers.ClipboardHelper
 import org.vinaygopinath.launchchat.helpers.DetailedActivityHelper
 import org.vinaygopinath.launchchat.helpers.IntentHelper
 import org.vinaygopinath.launchchat.helpers.PhoneNumberHelper
+import org.vinaygopinath.launchchat.helpers.TextHelper
 import org.vinaygopinath.launchchat.models.Action
 import org.vinaygopinath.launchchat.models.Activity
 import org.vinaygopinath.launchchat.models.DetailedActivity
@@ -96,6 +99,15 @@ class MainActivity : AppCompatActivity() {
         messageInput = findViewById(R.id.message_input)
         historyTitle = findViewById(R.id.history_title)
         historyListView = findViewById(R.id.history_list)
+        phoneNumberInput.addTextChangedListener(
+            afterTextChanged = {
+                if (phoneNumberInput.isFocused) {
+                    return@addTextChangedListener
+                }
+
+                updatePhoneNumberInputType()
+            }
+        )
         with(historyListView) {
             val linearLayoutManager = LinearLayoutManager(this@MainActivity)
             layoutManager = linearLayoutManager
@@ -154,7 +166,10 @@ class MainActivity : AppCompatActivity() {
             repeatOnLifecycle(Lifecycle.State.STARTED) {
                 launch {
                     viewModel.uiState.collect { uiState ->
-                        uiState.extractedContent?.let { handleExtractedContent(it) }
+                        uiState.extractedContent?.let {
+                            handleExtractedContent(it)
+                            updatePhoneNumberInputType()
+                        }
                     }
                 }
                 launch {
@@ -280,4 +295,15 @@ class MainActivity : AppCompatActivity() {
     private fun showHistory(activity: Activity) {
         viewModel.logActivityFromHistory(activity)
     }
+
+    private fun updatePhoneNumberInputType() {
+        val inputText = phoneNumberInput.text.toString()
+        val newInputType =
+            if (inputText.isBlank() || TextHelper.doesTextMatchPhoneNumberRegex(inputText)) {
+                InputType.TYPE_CLASS_PHONE
+            } else {
+                InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_FLAG_MULTI_LINE
+            }
+        phoneNumberInput.inputType = newInputType
+    }
 }

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

@@ -24,7 +24,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:autofillHints="phone"
-            android:inputType="textMultiLine"
+            android:inputType="phone"
             android:minLines="3" />
     </com.google.android.material.textfield.TextInputLayout>
 

app/src/test/kotlin/org/vinaygopinath/launchchat/helpers/TextHelperPasswordRegexTest.kt

@@ -0,0 +1,52 @@
+package org.vinaygopinath.launchchat.helpers
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+class TextHelperPasswordRegexTest {
+
+    @Test
+    fun `returns true when text is phone number with no formatting and no country code`() {
+        val inputText = "111222333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isTrue()
+    }
+
+    @Test
+    fun `returns true when text is phone number with no formatting and country code`() {
+        val inputText = "+1111222333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isTrue()
+    }
+
+
+    @Test
+    fun `returns true when text is phone number with space formatting`() {
+        val inputText = "111 222 333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isTrue()
+    }
+
+
+    @Test
+    fun `returns true when text is phone number with parentheses and space formatting`() {
+        val inputText = "(111) 222 333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isTrue()
+    }
+
+    @Test
+    fun `returns true when text is phone number with hyphen formatting`() {
+        val inputText = "111-222-333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isTrue()
+    }
+
+
+    @Test
+    fun `returns false when text includes non-numerical and non-formatting characters`() {
+        val inputText = "Please contact us on this phone number: +1(111)-222 333"
+
+        assertThat(TextHelper.doesTextMatchPhoneNumberRegex(inputText)).isFalse()
+    }
+}