Make password generator parameter changes reactive (#1480)

* Make XkPassword generator reactive

* Handle empty strings

* Make password generator reactive

* Sync changelog for 1.13.5 release

* Add to changelog

3 files changed, 49 insertions, 8 deletions

diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 4ae3136e..0ca522f7 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -102,6 +102,7 @@ dependencies {
   implementation(libs.thirdparty.bouncycastle)
   implementation(libs.thirdparty.eddsa)
   implementation(libs.thirdparty.fastscroll)
+  implementation(libs.thirdparty.flowbinding.android)
   implementation(libs.thirdparty.jgit) {
     exclude(group = "org.apache.httpcomponents", module = "httpclient")
   }
diff --git a/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/PasswordGeneratorDialogFragment.kt b/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/PasswordGeneratorDialogFragment.kt
index 4820521f..ab51cc4e 100644
--- a/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/PasswordGeneratorDialogFragment.kt
+++ b/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/PasswordGeneratorDialogFragment.kt
@@ -17,6 +17,7 @@ import androidx.appcompat.widget.AppCompatTextView
 import androidx.core.os.bundleOf
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.setFragmentResult
+import androidx.lifecycle.lifecycleScope
 import com.github.michaelbull.result.getOrElse
 import com.github.michaelbull.result.runCatching
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -28,7 +29,14 @@ import dev.msfjarvis.aps.util.pwgen.PasswordGenerator.generate
 import dev.msfjarvis.aps.util.pwgen.PasswordGenerator.setPrefs
 import dev.msfjarvis.aps.util.pwgen.PasswordOption
 import dev.msfjarvis.aps.util.settings.PreferenceKeys
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.merge
+import kotlinx.coroutines.flow.onEach
+import reactivecircus.flowbinding.android.widget.afterTextChanges
+import reactivecircus.flowbinding.android.widget.checkedChanges
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class PasswordGeneratorDialogFragment : DialogFragment() {
 
   override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
@@ -49,9 +57,21 @@ class PasswordGeneratorDialogFragment : DialogFragment() {
     binding.lowercase.isChecked = !prefs.getBoolean(PasswordOption.NoLowercaseLetters.key, false)
     binding.ambiguous.isChecked = !prefs.getBoolean(PasswordOption.NoAmbiguousCharacters.key, false)
     binding.pronounceable.isChecked = !prefs.getBoolean(PasswordOption.FullyRandom.key, true)
-
     binding.lengthNumber.setText(prefs.getInt(PreferenceKeys.LENGTH, 20).toString())
     binding.passwordText.typeface = monoTypeface
+
+    merge(
+        binding.numerals.checkedChanges().skipInitialValue(),
+        binding.symbols.checkedChanges().skipInitialValue(),
+        binding.uppercase.checkedChanges().skipInitialValue(),
+        binding.lowercase.checkedChanges().skipInitialValue(),
+        binding.ambiguous.checkedChanges().skipInitialValue(),
+        binding.pronounceable.checkedChanges().skipInitialValue(),
+        binding.lengthNumber.afterTextChanges().skipInitialValue(),
+      )
+      .onEach { generate(binding.passwordText) }
+      .launchIn(lifecycleScope)
+
     return builder
       .run {
         setTitle(R.string.pwgen_title)
diff --git a/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/XkPasswordGeneratorDialogFragment.kt b/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/XkPasswordGeneratorDialogFragment.kt
index ad252975..645ab9ba 100644
--- a/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/XkPasswordGeneratorDialogFragment.kt
+++ b/app/src/main/java/dev/msfjarvis/aps/ui/dialogs/XkPasswordGeneratorDialogFragment.kt
@@ -15,6 +15,7 @@ import androidx.core.content.edit
 import androidx.core.os.bundleOf
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.setFragmentResult
+import androidx.lifecycle.lifecycleScope
 import com.github.ajalt.timberkt.Timber.tag
 import com.github.michaelbull.result.fold
 import com.github.michaelbull.result.getOr
@@ -26,8 +27,14 @@ import dev.msfjarvis.aps.ui.crypto.PasswordCreationActivity
 import dev.msfjarvis.aps.util.extensions.getString
 import dev.msfjarvis.aps.util.pwgenxkpwd.CapsType
 import dev.msfjarvis.aps.util.pwgenxkpwd.PasswordBuilder
-
-/** A placeholder fragment containing a simple view. */
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.merge
+import kotlinx.coroutines.flow.onEach
+import reactivecircus.flowbinding.android.widget.afterTextChanges
+import reactivecircus.flowbinding.android.widget.selectionEvents
+
+@OptIn(ExperimentalCoroutinesApi::class)
 class XkPasswordGeneratorDialogFragment : DialogFragment() {
 
   override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
@@ -69,21 +76,34 @@ class XkPasswordGeneratorDialogFragment : DialogFragment() {
 
     val dialog = builder.setTitle(this.resources.getString(R.string.xkpwgen_title)).create()
 
+    // make parameter changes reactive and automatically update passwords
+    merge(
+        binding.xkSeparator.afterTextChanges().skipInitialValue(),
+        binding.xkCapType.selectionEvents().skipInitialValue(),
+        binding.xkNumWords.afterTextChanges().skipInitialValue(),
+        binding.xkNumberSymbolMask.afterTextChanges().skipInitialValue(),
+      )
+      .onEach { updatePassword(binding, prefs) }
+      .launchIn(lifecycleScope)
+
     dialog.setOnShowListener {
-      setPreferences(binding, prefs)
-      makeAndSetPassword(binding)
+      updatePassword(binding, prefs)
 
       dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setOnClickListener {
-        setPreferences(binding, prefs)
-        makeAndSetPassword(binding)
+        updatePassword(binding, prefs)
       }
     }
     return dialog
   }
 
+  private fun updatePassword(binding: FragmentXkpwgenBinding, prefs: SharedPreferences) {
+    setPreferences(binding, prefs)
+    makeAndSetPassword(binding)
+  }
+
   private fun makeAndSetPassword(binding: FragmentXkpwgenBinding) {
     PasswordBuilder(requireContext())
-      .setNumberOfWords(Integer.valueOf(binding.xkNumWords.text.toString()))
+      .setNumberOfWords(binding.xkNumWords.text.toString().ifBlank { "0" }.toInt())
       .setMinimumWordLength(DEFAULT_MIN_WORD_LENGTH)
       .setMaximumWordLength(DEFAULT_MAX_WORD_LENGTH)
       .setSeparator(binding.xkSeparator.text.toString())