Option to format a usb drive to store music

src/freedombone-app-koel

@@ -230,6 +230,29 @@ function koel_export_to_usb {
     dialog --title $"Export music to USB drive" --msgbox $'Export complete. You may now remove the USB drive' 6 50
 }
 
+function format_music_drive {
+    detect_usb_drive
+    data=$(tempfile 2>/dev/null)
+    trap "rm -f $data" 0 1 2 5 15
+    dialog --title $"Format USB drive $USB_DRIVE for music storage" \
+           --backtitle $"Freedombone Control Panel" \
+           --defaultno \
+           --yesno $"\nPlease confirm that you wish to format drive\n\n    ${USB_DRIVE}\n\nAll current data on the drive will be lost, and you will be prompted to give a password used to encrypt the drive.\n\nDANGER: If you screw up here and format the wrong drive it's your own fault!" 16 60
+    sel=$?
+    case $sel in
+        1) return;;
+        255) return;;
+    esac
+
+    clear
+    echo ''
+    echo $"Formatting drive $USB_DRIVE. ALL CONTENTS WILL BE LOST."
+    echo ''
+    ${PROJECT_NAME}-format $USB_DRIVE
+    dialog --title $"Format USB drive $USB_DRIVE for music storage" --msgbox $'Format complete. You may now export music or remove the USB drive' 6 50
+}
+
+
 function configure_interactive_koel {
     while true
     do
@@ -237,11 +260,12 @@ function configure_interactive_koel {
         trap "rm -f $data" 0 1 2 5 15
         dialog --backtitle $"Freedombone Control Panel" \
                --title $"Koel" \
-               --radiolist $"Choose an operation:" 14 70 4 \
+               --radiolist $"Choose an operation:" 15 70 5 \
                1 $"Import music from directory" off \
                2 $"Import music from USB drive" off \
                3 $"Export music to USB drive" off \
-               4 $"Exit" on 2> $data
+               4 $"Format a USB drive for music storage" off \
+               5 $"Exit" on 2> $data
         sel=$?
         case $sel in
             1) break;;
@@ -251,7 +275,8 @@ function configure_interactive_koel {
             1) koel_import_from_directory;;
             2) koel_import_from_usb;;
             3) koel_export_to_usb;;
-            4) break;;
+            4) format_music_drive;;
+            5) break;;
         esac
     done
 }