Prompt user with binary question

prompt.sh

#!/usr/bin/env zsh

promptUser() {
  # Check if no parameters are supplied
  if [[ $# -eq 0 ]]; then
    echo "Usage: promptUser <message> [positiveWord] [negativeWord]"
    return 1
  fi

  local message=$1
  local positiveWord=${2:-Yes}
  local negativeWord=${3:-No}
  local response
  local positiveStringKey="\x1b[1m${positiveWord:0:1}\x1b[0m${positiveWord:1}"
  local negativeStringKey="\x1b[1m${negativeWord:0:1}\x1b[0m${negativeWord:1}"
  local positiveKey="${positiveWord:0:1}"
  local negativeKey="${negativeWord:0:1}"
  local negativeDisplay=$(echo "$negativeWord" | awk '{print tolower($0)}')

  # Display the message with the formatted prompt
  printf "$message (${positiveStringKey}/${negativeStringKey}): "

  # Continuously wait for the correct input
  while true; do
    # Read a single character silently (no echo)
    read -s -k 1 response

    # Convert input to lowercase for comparison
    local lowerResponse=${response:l}
    local lowerPositiveKey=${positiveKey:l}
    local lowerNegativeKey=${negativeKey:l}

    if [[ $lowerResponse == $lowerPositiveKey ]]; then
      echo "$positiveWord"
      break
    elif [[ $lowerResponse == $lowerNegativeKey ]]; then
      echo "$negativeWord"
      break
    fi
    # If invalid input, continue the loop without printing anything
  done
}

# Function to check if script is sourced
is_script_sourced() {
  if [[ -n $ZSH_VERSION ]]; then
    # For Zsh
    (( ${#funcstack[@]} > 1 ))
  elif [[ -n $BASH_VERSION ]]; then
    # For Bash
    (( ${#BASH_SOURCE[@]} > 1 ))
  else
    # Default to false
    return 1
  fi
}

# Detect if the script is being sourced or run directly
if is_script_sourced; then
  true
else
  promptUser ${@}
fi