Enable Disable Bluetooth based on Macbook being opened or not

configure_bluetooth_toggle.sh

#!/bin/bash

# Script: configure_bluetooth_toggle.sh
# Purpose: Automatically toggle Bluetooth on macOS when the laptop lid is opened/closed using sleepwatcher and blueutil.
# Prerequisites:
#   - Homebrew (https://brew.sh) must be installed.
#   - sleepwatcher and blueutil must be installed via Homebrew (run `brew install sleepwatcher blueutil`).
# Usage:
#   Run this script from the terminal: `bash configure_bluetooth_toggle.sh`
#   It will create/update .sleep and .wakeup scripts in your home directory and restart the sleepwatcher service.
# To undo:
#   1. Remove the .sleep and .wakeup files from your home directory: `rm ~/.sleep ~/.wakeup`
#   2. Restart sleepwatcher to stop using the scripts: `brew services restart sleepwatcher` or stop it: `brew services stop sleepwatcher`

# --- Function Definitions ---

check_command_exists() {
  # Checks if a command is in the PATH.
  # Args: command_name
  # Returns: 0 if command exists, 1 if not.
  command -v "$1" >/dev/null 2>&1
  return $?
}

check_file_content() {
  # Checks if a file exists and contains the expected content.
  # Args: filepath, expected_content
  # Returns: 0 if file exists and content matches, 1 if not or file doesn't exist.
  if [ -f "$1" ]; then
    if grep -qF -- "$2" "$1"; then # -F for fixed string, -q for quiet
      return 0 # File exists and contains content
    else
      return 1 # File exists but content doesn't match
    fi
  else
    return 1 # File does not exist
  fi
}

create_script_file() {
  # Creates a script file, writes content, and sets executable permissions.
  # Args: filepath, content
  # Returns: 0 on success, 1 on failure.
  echo -e "$2" > "$1"
  if [ $? -ne 0 ]; then
    echo "Error: Failed to write to file: $1"
    return 1
  fi
  chmod 755 "$1"
  if [ $? -ne 0 ]; then
    echo "Error: Failed to set executable permissions on: $1"
    return 1
  fi
  return 0
}

restart_service() {
  # Restarts a Homebrew service and provides feedback.
  # Args: service_name
  # Returns: 0 on successful restart, 1 on failure.
  echo "Restarting service: $1..."
  brew services restart "$1"
  if [ $? -ne 0 ]; then
    echo "Error: Failed to restart service: $1"
    return 1
  fi
  echo "Service $1 restarted successfully."
  return 0
}

# --- Dependency Checks ---

echo "--- Checking Dependencies ---"

if ! check_command_exists blueutil; then
  echo "Error: blueutil is not installed. Please install it using 'brew install blueutil'"
  exit 1
fi
echo "blueutil found."

if ! check_command_exists sleepwatcher; then
  echo "Error: sleepwatcher is not installed. Please install it using 'brew install sleepwatcher blueutil'"
  exit 1
fi
echo "sleepwatcher found."

echo "Dependencies checked successfully."
echo "---"

# --- Script Content Definition ---

sleep_script_path="$HOME/.sleep"
wakeup_script_path="$HOME/.wakeup"

sleep_command="$(which blueutil) -p 0"
wakeup_command="$(which blueutil) -p 1"

sleep_script_content="#!/bin/bash\n${sleep_command}\nexit 0"
wakeup_script_content="#!/bin/bash\n${wakeup_command}\nexit 0"


# --- Create/Update .sleep script ---

echo "--- Configuring .sleep script ---"
if check_file_content "$sleep_script_path" "$sleep_command"; then
  echo ".sleep script already configured correctly."
else
  echo "Creating/Updating .sleep script: $sleep_script_path"
  if create_script_file "$sleep_script_path" "$sleep_script_content"; then
    echo ".sleep script created/updated successfully."
  else
    echo "Error: Failed to create/update .sleep script."
    exit 1
  fi
fi
echo "---"


# --- Create/Update .wakeup script ---

echo "--- Configuring .wakeup script ---"
if check_file_content "$wakeup_script_path" "$wakeup_command"; then
  echo ".wakeup script already configured correctly."
else
  echo "Creating/Updating .wakeup script: $wakeup_script_path"
  if create_script_file "$wakeup_script_path" "$wakeup_script_content"; then
    echo ".wakeup script created/updated successfully."
  else
    echo "Error: Failed to create/update .wakeup script."
    exit 1
  fi
fi
echo "---"


# --- Restart sleepwatcher service ---

echo "--- Restarting sleepwatcher service ---"
if restart_service sleepwatcher; then
  echo "sleepwatcher service restarted and is now using the new scripts."
else
  echo "Error: Failed to restart sleepwatcher service. Please check the logs using 'brew services logs sleepwatcher'."
  exit 1
fi
echo "---"


# --- Success Message ---

echo "Bluetooth automatic toggle on lid close/open configured successfully!"
echo " "
echo "To undo this configuration:"
echo "1. Remove the .sleep and .wakeup files: rm ~/.sleep ~/.wakeup"
echo "2. Restart sleepwatcher (or stop it): brew services restart sleepwatcher"
echo " "

exit 0