refactor(helpers): minor code cleanup and documentation fixes

app/src/main/java/com/michatec/radio/dialogs/ThemeSelectionDialog.kt

@@ -27,28 +27,6 @@ class ThemeSelectionDialog(private var themeSelectionDialogListener: ThemeSelect
     private lateinit var dialog: AlertDialog
 
 
-    /* Update radio buttons to reflect current theme */
-    private fun updateRadioButtons(
-        context: Context,
-        radioFollowSystem: RadioButton,
-        radioLight: RadioButton,
-        radioDark: RadioButton
-    ) {
-        val currentTheme = AppThemeHelper.getCurrentTheme(context)
-        when (currentTheme) {
-            context.getString(R.string.pref_theme_selection_mode_device_default) -> {
-                radioFollowSystem.isChecked = true
-            }
-            context.getString(R.string.pref_theme_selection_mode_light) -> {
-                radioLight.isChecked = true
-            }
-            context.getString(R.string.pref_theme_selection_mode_dark) -> {
-                radioDark.isChecked = true
-            }
-        }
-    }
-
-
     /* Construct and show dialog */
     fun show(context: Context) {
         // prepare dialog builder

app/src/main/java/com/michatec/radio/helpers/BackupHelper.kt

@@ -53,7 +53,7 @@ object BackupHelper {
         Snackbar.make(view, R.string.toastmessage_restored, Snackbar.LENGTH_LONG).show()
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
-            // bypass "ZipException" for Android 14 or above applications when zip file names contain ".." or start with "/"
+            // bypass "ZipException" for Android 14 or above applications when zip file names contain "." or start with "/"
             dalvik.system.ZipPathValidator.clearCallback()
         }
 

app/src/main/java/com/michatec/radio/helpers/CollectionHelper.kt

@@ -299,7 +299,7 @@ object CollectionHelper {
     }
 
 
-    /* Returns the children stations under under root (simple media library structure: root > stations) */
+    /* Returns the children stations under root (simple media library structure: root > stations) */
     fun getChildren(context: Context, collection: Collection): List<MediaItem> {
         val mediaItems: MutableList<MediaItem> = mutableListOf()
         collection.stations.forEach { station ->

app/src/main/java/com/michatec/radio/helpers/DateTimeHelper.kt

@@ -17,14 +17,14 @@ object DateTimeHelper {
 
 
     /* Main class variables */
-    private const val pattern: String = "EEE, dd MMM yyyy HH:mm:ss Z"
+    private const val PATTERN: String = "EEE, dd MMM yyyy HH:mm:ss Z"
-    private val dateFormat: SimpleDateFormat = SimpleDateFormat(pattern, Locale.ENGLISH)
+    private val dateFormat: SimpleDateFormat = SimpleDateFormat(PATTERN, Locale.ENGLISH)
 
 
     /* Converts RFC 2822 string representation of a date to DATE */
     fun convertFromRfc2822(dateString: String): Date {
         val date: Date = try {
-            // parse date string using standard pattern
+            // parse date string using standard PATTERN
             dateFormat.parse((dateString)) ?: Keys.DEFAULT_DATE
         } catch (e: Exception) {
             Log.w(TAG, "Unable to parse. Trying an alternative Date format. $e")
@@ -37,7 +37,7 @@ object DateTimeHelper {
 
     /* Converts a DATE to its RFC 2822 string representation */
     fun convertToRfc2822(date: Date): String {
-        val dateFormat = SimpleDateFormat(pattern, Locale.ENGLISH)
+        val dateFormat = SimpleDateFormat(PATTERN, Locale.ENGLISH)
         return dateFormat.format(date)
     }
 

app/src/main/java/com/michatec/radio/helpers/DownloadHelper.kt

@@ -370,7 +370,7 @@ object DownloadHelper {
     private fun determineAllowedNetworkTypes(type: Int, ignoreWifiRestriction: Boolean): Int {
         var allowedNetworkTypes: Int =
             (DownloadManager.Request.NETWORK_WIFI or DownloadManager.Request.NETWORK_MOBILE)
-        // restrict download of audio files to WiFi if necessary
+        // restrict download of audio files to Wi-Fi if necessary
         if (type == Keys.FILE_TYPE_AUDIO) {
             if (!ignoreWifiRestriction && !PreferencesHelper.downloadOverMobile()) {
                 allowedNetworkTypes = DownloadManager.Request.NETWORK_WIFI

app/src/main/java/com/michatec/radio/helpers/NetworkHelper.kt

@@ -115,7 +115,7 @@ object NetworkHelper {
     }
 
 
-    /* Creates a http connection from given url string */
+    /* Creates an http connection from given url string */
     private fun createConnection(urlString: String, redirectCount: Int = 0): HttpURLConnection? {
         var connection: HttpURLConnection? = null