Trim e-mail and username to ease the login process

Spaces aren't visible in EditText and it's possible to
get authentication errors because of that invisible space.

app/src/main/java/gq/kirmanak/mealient/extensions/ViewExtensions.kt

@@ -7,9 +7,11 @@ import android.view.WindowInsets
 import android.widget.EditText
 import android.widget.TextView
 import androidx.annotation.RequiresApi
+import androidx.annotation.StringRes
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.widget.doAfterTextChanged
-import androidx.lifecycle.LifecycleCoroutineScope
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.lifecycleScope
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import com.google.android.material.textfield.TextInputLayout
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -21,6 +23,7 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
 import timber.log.Timber
 
 @OptIn(ExperimentalCoroutinesApi::class)
@@ -83,25 +86,24 @@ fun <T> ChannelResult<T>.logErrors(methodName: String): ChannelResult<T> {
 
 fun EditText.checkIfInputIsEmpty(
     inputLayout: TextInputLayout,
-    lifecycleCoroutineScope: LifecycleCoroutineScope,
+    lifecycleOwner: LifecycleOwner,
-    errorText: () -> String
+    @StringRes stringId: Int,
+    trim: Boolean = true,
 ): String? {
-    Timber.v("checkIfInputIsEmpty() called with: input = $this, inputLayout = $inputLayout, errorText = $errorText")
+    val input = if (trim) text?.trim() else text
-    val text = text?.toString()
+    val text = input?.toString().orEmpty()
     Timber.d("Input text is \"$text\"")
-    if (text.isNullOrEmpty()) {
+    return text.ifEmpty {
-        inputLayout.error = errorText()
+        inputLayout.error = resources.getString(stringId)
-        lifecycleCoroutineScope.launchWhenResumed {
+        lifecycleOwner.lifecycleScope.launch {
             waitUntilNotEmpty()
             inputLayout.error = null
         }
-        return null
+        null
     }
-    return text
 }
 
 suspend fun EditText.waitUntilNotEmpty() {
-    Timber.v("waitUntilNotEmpty() called with: input = $this")
     textChangesFlow().filterNotNull().first { it.isNotEmpty() }
     Timber.v("waitUntilNotEmpty() returned")
 }

app/src/main/java/gq/kirmanak/mealient/ui/auth/AuthenticationFragment.kt

@@ -39,13 +39,18 @@ class AuthenticationFragment : Fragment(R.layout.fragment_authentication) {
     private fun onLoginClicked(): Unit = with(binding) {
         Timber.v("onLoginClicked() called")
 
-        val email: String = emailInput.checkIfInputIsEmpty(emailInputLayout, lifecycleScope) {
+        val email: String = emailInput.checkIfInputIsEmpty(
-            getString(R.string.fragment_authentication_email_input_empty)
+            inputLayout = emailInputLayout,
-        } ?: return
+            lifecycleOwner = viewLifecycleOwner,
+            stringId = R.string.fragment_authentication_email_input_empty,
+        ) ?: return
 
-        val pass: String = passwordInput.checkIfInputIsEmpty(passwordInputLayout, lifecycleScope) {
+        val pass: String = passwordInput.checkIfInputIsEmpty(
-            getString(R.string.fragment_authentication_password_input_empty)
+            inputLayout = passwordInputLayout,
-        } ?: return
+            lifecycleOwner = viewLifecycleOwner,
+            stringId = R.string.fragment_authentication_password_input_empty,
+            trim = false,
+        ) ?: return
 
         button.isClickable = false
         viewLifecycleOwner.lifecycleScope.launch {

app/src/main/java/gq/kirmanak/mealient/ui/baseurl/BaseURLFragment.kt

@@ -4,7 +4,6 @@ import android.os.Bundle
 import android.view.View
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import by.kirich1409.viewbindingdelegate.viewBinding
 import dagger.hilt.android.AndroidEntryPoint
@@ -29,9 +28,11 @@ class BaseURLFragment : Fragment(R.layout.fragment_base_url) {
 
     private fun onProceedClick(view: View) {
         Timber.v("onProceedClick() called with: view = $view")
-        val url = binding.urlInput.checkIfInputIsEmpty(binding.urlInputLayout, lifecycleScope) {
+        val url = binding.urlInput.checkIfInputIsEmpty(
-            getString(R.string.fragment_baseurl_url_input_empty)
+            inputLayout = binding.urlInputLayout,
-        } ?: return
+            lifecycleOwner = viewLifecycleOwner,
+            stringId = R.string.fragment_baseurl_url_input_empty,
+        ) ?: return
         viewModel.saveBaseUrl(url)
     }