Get Interactive User Input with Validation

#!/bin/bash

# Function to get non-empty string input
get_string_input() {
  local prompt_msg="$1"
  local var_name="$2"
  local input_val=""
  while true; do
    read -p "$prompt_msg: " input_val
    if [ -n "$input_val" ]; then
      eval "$var_name=\"$input_val\""
      break
    else
      echo "Input cannot be empty. Please try again."
    fi
  done
}

# Function to get numeric input
get_numeric_input() {
  local prompt_msg="$1"
  local var_name="$2"
  local input_val=""
  while true; do
    read -p "$prompt_msg: " input_val
    # Check if input is a valid integer (positive or negative)
    if [[ "$input_val" =~ ^-?[0-9]+$ ]]; then
      eval "$var_name=$input_val"
      break
    else
      echo "Invalid input. Please enter a number."
    fi
  done
}

# Example Usage:
echo "--- User Profile Setup ---"

USER_NAME=""
get_string_input "Enter your name" USER_NAME
echo "Hello, $USER_NAME!"

USER_AGE=0
get_numeric_input "Enter your age" USER_AGE
echo "You are $USER_AGE years old."

CONFIRMATION=""
read -p "Are you sure this information is correct? (yes/no): " CONFIRMATION
if [[ "$CONFIRMATION" =~ ^[Yy][Ee][Ss]$ ]]; then
  echo "Information confirmed. Script proceeding..."
else
  echo "Information not confirmed. Exiting."
  exit 1
fi