refactor: simplify download options storing and restoring logic

app/src/main/java/com/github/libretube/ui/dialogs/DownloadPlaylistDialog.kt

@@ -23,6 +23,8 @@ class DownloadPlaylistDialog : DialogFragment() {
     private lateinit var playlistName: String
     private lateinit var playlistType: PlaylistType
 
+    private val availableLanguages = LocaleHelper.getAvailableLocales()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -41,7 +43,6 @@ class DownloadPlaylistDialog : DialogFragment() {
         }
         val possibleAudioQualities = resources.getStringArray(R.array.audioQualityBitrates)
             .toList()
-        val availableLanguages = LocaleHelper.getAvailableLocales()
 
         binding.videoSpinner.items = listOf(getString(R.string.no_video)) + possibleVideoQualities
         binding.audioSpinner.items = listOf(getString(R.string.no_audio)) + possibleAudioQualities
@@ -57,31 +58,12 @@ class DownloadPlaylistDialog : DialogFragment() {
             .setView(binding.root)
             .setPositiveButton(R.string.download) { _, _ ->
                 with(binding) {
-                    val maxVideoQuality = if (videoSpinner.selectedItemPosition >= 1) {
+                    val maxVideoQuality = possibleVideoQualities.getOrNull(videoSpinner.selectedItemPosition - 1)
-                        possibleVideoQualities[videoSpinner.selectedItemPosition - 1]
+                        .getWhileDigit()
-                            .getWhileDigit()
+                    val maxAudioQuality = possibleAudioQualities.getOrNull(audioSpinner.selectedItemPosition - 1)
-                    } else {
+                        .getWhileDigit()
-                        null
+                    val captionLanguage = availableLanguages.getOrNull(subtitleSpinner.selectedItemPosition - 1)?.code
-                    }
+                    val audioLanguage = availableLanguages.getOrNull(audioLanguageSpinner.selectedItemPosition - 1)?.code
-
-                    val maxAudioQuality = if (audioSpinner.selectedItemPosition >= 1) {
-                        possibleAudioQualities[audioSpinner.selectedItemPosition - 1]
-                            .getWhileDigit()
-                    } else {
-                        null
-                    }
-
-                    val captionLanguage = if (subtitleSpinner.selectedItemPosition >= 1) {
-                        availableLanguages[subtitleSpinner.selectedItemPosition - 1].code
-                    } else {
-                        null
-                    }
-
-                    val audioLanguage = if (audioLanguageSpinner.selectedItemPosition >= 1) {
-                        availableLanguages[audioLanguageSpinner.selectedItemPosition - 1].code
-                    } else {
-                        null
-                    }
 
                     saveSelections(binding)
 
@@ -109,36 +91,34 @@ class DownloadPlaylistDialog : DialogFragment() {
     }
 
     private fun saveSelections(binding: DialogDownloadPlaylistBinding) {
-        binding.audioSpinner.selectedItemPosition.let { index ->
+        binding.audioSpinner.getSelectionIfNotFirst().let { item ->
-            val item = binding.audioSpinner.items[index].takeIf { index != 0 }
             PreferenceHelper.putString(PLAYLIST_DOWNLOAD_AUDIO_QUALITY, item.orEmpty())
         }
-        binding.videoSpinner.selectedItemPosition.let { index ->
+        binding.videoSpinner.getSelectionIfNotFirst().let { item ->
-            val item = binding.videoSpinner.items[index].takeIf { index != 0 }
             PreferenceHelper.putString(PLAYLIST_DOWNLOAD_VIDEO_QUALITY, item.orEmpty())
         }
         binding.audioLanguageSpinner.selectedItemPosition.let { index ->
-            val item = binding.audioLanguageSpinner.items[index].takeIf { index != 0 }
+            val language = availableLanguages.getOrNull(index - 1)
-            PreferenceHelper.putString(PLAYLIST_DOWNLOAD_AUDIO_LANGUAGE, item.orEmpty())
+            PreferenceHelper.putString(PLAYLIST_DOWNLOAD_AUDIO_LANGUAGE, language?.code.orEmpty())
         }
         binding.subtitleSpinner.selectedItemPosition.let { index ->
-            val item = binding.subtitleSpinner.items[index].takeIf { index != 0 }
+            val language = availableLanguages.getOrNull(index - 1)
-            PreferenceHelper.putString(PLAYLIST_DOWNLOAD_CAPTION_LANGUAGE, item.orEmpty())
+            PreferenceHelper.putString(PLAYLIST_DOWNLOAD_CAPTION_LANGUAGE, language?.code.orEmpty())
         }
     }
 
     private fun restoreSelections(binding: DialogDownloadPlaylistBinding) {
         val videoQuality = PreferenceHelper.getString(PLAYLIST_DOWNLOAD_VIDEO_QUALITY, "")
-        binding.videoSpinner.selectedItemPosition = binding.videoSpinner.items.indexOf(videoQuality).takeIf { it != -1 } ?: 0
+        binding.videoSpinner.setSelection(videoQuality)
 
         val audioQuality = PreferenceHelper.getString(PLAYLIST_DOWNLOAD_AUDIO_QUALITY, "")
-        binding.audioSpinner.selectedItemPosition = binding.audioSpinner.items.indexOf(audioQuality).takeIf { it != -1 } ?: 0
+        binding.audioSpinner.setSelection(audioQuality)
 
         val audioLanguage = PreferenceHelper.getString(PLAYLIST_DOWNLOAD_AUDIO_LANGUAGE, "")
-        binding.audioLanguageSpinner.selectedItemPosition = binding.audioLanguageSpinner.items.indexOf(audioLanguage).takeIf { it != -1 } ?: 0
+        binding.audioLanguageSpinner.setSelection(audioLanguage)
 
         val captionLanguage = PreferenceHelper.getString(PLAYLIST_DOWNLOAD_CAPTION_LANGUAGE, "")
-        binding.subtitleSpinner.selectedItemPosition = binding.subtitleSpinner.items.indexOf(captionLanguage).takeIf { it != -1 } ?: 0
+        binding.subtitleSpinner.setSelection(captionLanguage)
     }
 
     companion object {

app/src/main/java/com/github/libretube/ui/dialogs/SubmitDeArrowDialog.kt

@@ -86,7 +86,7 @@ class SubmitDeArrowDialog: DialogFragment() {
 
         val userID = PreferenceHelper.getSponsorBlockUserID()
         val userAgent = TextUtils.getUserAgent(context)
-        val title = binding.dearrowTitle.text
+        val title = binding.dearrowTitle.selectedItem
             .takeIf { it.isNotEmpty() && binding.titleCheckbox.isChecked }
             ?.let { DeArrowSubmitTitle(it) }
         val thumbnail = binding.thumbnailTime.text.toString().parseDurationString()

app/src/main/java/com/github/libretube/ui/views/DropdownMenu.kt

@@ -38,15 +38,7 @@ class DropdownMenu(
         get() = adapter.getPosition(binding.autoCompleteTextView.text.toString())
         set(index) = binding.autoCompleteTextView.setText(adapter.getItem(index), false)
 
-    val text get() = binding.autoCompleteTextView.text.toString()
+    val selectedItem get() = binding.autoCompleteTextView.text.toString()
-
-    override fun setEnabled(enabled: Boolean) {
-        binding.textInputLayout.isEnabled = enabled
-    }
-
-    override fun isEnabled(): Boolean {
-        return binding.textInputLayout.isEnabled
-    }
 
     var typingEnabled: Boolean
         set(enabled) {
@@ -54,6 +46,21 @@ class DropdownMenu(
         }
         get() = binding.autoCompleteTextView.inputType != InputType.TYPE_NULL
 
+    override fun setEnabled(enabled: Boolean) {
+        binding.textInputLayout.isEnabled = enabled
+    }
+
+    override fun isEnabled() = binding.textInputLayout.isEnabled
+
+    fun setSelection(item: String) {
+        val itemIndex = items.indexOf(item)
+        if (itemIndex != -1) selectedItemPosition = itemIndex
+    }
+
+    fun getSelectionIfNotFirst(): String? {
+        return selectedItem.takeIf { selectedItemPosition != 0 }
+    }
+
     init {
         context.obtainStyledAttributes(attributeSet, R.styleable.DropdownMenu, 0, 0).use {
             binding.textInputLayout.hint = it.getString(R.styleable.DropdownMenu_hint)