.tga/.tpc Bash Version

#!/bin/bash

shopt -s nocaseglob nocasematch
cd "$(dirname "$0")"/"$(echo override | tr '[:upper:]' '[:lower:]')"

readonly VERSION=1.2 SUPPORTED_FILE_TYPES=(tga tpc)
echo "Version ${VERSION}\n\nPlease be sure this file is located in the game's root folder (where the game's .exe is located) and not in the Override folder.\n\nThis script deletes duplicate TGA or TPC files in the Override folder.\n"

confirm_delete() {
  read -p "Delete $1? [y/n]: " input_del
  case "${input_del,,}" in [y]*) rm "$1"; echo "Deleted $1";; esac
}

delete_duplicates() {
  local files=($(find . -iname "*.$1" -print0 | xargs -0))
  if (( ${#files[@]} )); then
    for file in "${files[@]}"; do
      local companion_file_path="${file%.*}.tpc"
      [[ "$1" == "tpc" ]] && companion_file_path="${file%.*}.tga"
      if [[ -e "$companion_file_path" ]]; then
        if (( dry_run )); then
          echo "Would delete $file (duplicate found: $companion_file_path)"
        else
          echo "Deleting $file (duplicate found: $companion_file_path)"
          confirm_delete "$file"
          (( deleted_files++ ))
        fi
      fi
    done
    (( deleted_files )) || echo "No duplicates found for ${1^^} files."
  else
    echo "No ${1^^} files found."
  fi
}

dry_run=0
while getopts "n" opt; do [[ $opt == n ]] && dry_run=1; done

for type in "${SUPPORTED_FILE_TYPES[@]}"; do
  read -p "Do you want to delete duplicate ${type^^} files? [y/n]: " input_del
  echo ""
  [[ "$input_del" =~ [yY](es)? ]] && delete_duplicates "$type" "$dry_run"
done

echo -e "\nFinished"