fix: check filename pattern for invalid characters (#304)

Refs: #15

Author: naveensingh

app/src/main/kotlin/org/fossify/voicerecorder/dialogs/FilenamePatternDialog.kt

@@ -3,6 +3,7 @@ package org.fossify.voicerecorder.dialogs
 import androidx.appcompat.app.AlertDialog
 import androidx.core.widget.doAfterTextChanged
 import org.fossify.commons.extensions.getAlertDialogBuilder
+import org.fossify.commons.extensions.isAValidFilename
 import org.fossify.commons.extensions.setupDialogStuff
 import org.fossify.commons.extensions.viewBinding
 import org.fossify.voicerecorder.R
@@ -26,7 +27,7 @@ class FilenamePatternDialog(private val activity: SimpleActivity, private val ca
                 true
             }
 
-            filenamePatternValue.doAfterTextChanged { validatePattern(it?.toString().orEmpty()) }
+            filenamePatternValue.doAfterTextChanged { validatePattern(it?.toString().orEmpty().trim()) }
         }
 
         activity.getAlertDialogBuilder()
@@ -36,7 +37,7 @@ class FilenamePatternDialog(private val activity: SimpleActivity, private val ca
                 activity.setupDialogStuff(binding.root, this, R.string.filename_pattern) { alertDialog ->
                     dialog = alertDialog
                     alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
-                        val newPattern = binding.filenamePatternValue.text.toString()
+                        val newPattern = binding.filenamePatternValue.text.toString().trim()
                         config.filenamePattern = newPattern
                         callback(newPattern)
                         alertDialog.dismiss()
@@ -48,6 +49,7 @@ class FilenamePatternDialog(private val activity: SimpleActivity, private val ca
     private fun validatePattern(pattern: String) {
         binding.filenamePatternHint.error = when {
             pattern.isEmpty() -> activity.getString(org.fossify.commons.R.string.filename_cannot_be_empty)
+            !pattern.isAValidFilename() -> activity.getString(org.fossify.commons.R.string.invalid_name)
             !containsAllDateTimePlaceholders(pattern) -> activity.getString(R.string.filename_pattern_must_contain_all)
             else -> null
         }