<?php

final class neato {

  const get_opt = '/opt/';
  const get_etc = '/etc/';  
  const get_bin = '/bin/';  
  const get_user_bin = '/usr/bin/';
  const get_super_user_bin = '/usr/sbin/';
  const get_user_local_bin = '/usr/local/bin/';
  
  protected function __construct() {
    
  }
    
  public static function is_installed(string $prog) {
    exec(self::get_user_bin . 'dpkg -s ' . safe_cmd($prog) . ' | ' . self::get_bin . 'grep "install ok installed"', $out, $exit_code);
    exec(self::get_user_bin . 'dpkg -s ' . safe_cmd($prog) . ' | ' . self::get_bin . 'grep ^Version', $output, $code);
    $version = str_replace('Version: ', '', $output[0]);
    return ($exit_code == 0) ? ['installed' => true, 'version' => $version] : ['installed' => false];
  }

  public static function service(string $name, string $action = 'restart') {
    exec(self::get_super_user_bin . 'service ' . safe_cmd($name, $action), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to {$action} Service called: {$name}");
    return $exit_code;
  }

  public static function systemctl(string $name, string $action = 'enable') {
    exec(self::get_bin . 'systemctl ' . safe_cmd($action, $name), $output, $exit_code);
    check_for_error($exit_code, "Unable to {$action} Service called: {$name}");
    return $exit_code;
  }

  public static function upgrade(string $prog) {
    exec(self::get_user_bin . 'apt-get upgrade -y ' . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to upgrade: {$prog}");
    return $exit_code;
  }

  public static function install(string $prog) {
    exec(self::get_user_bin . 'apt-get install -y ' . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to install: {$prog}");
    return $exit_code;
  }

  public static function purge(string $prog) {
    exec(self::get_user_bin . 'apt-get --purge remove -y ' . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to uninstall: {$prog}");
    return $exit_code;
  }

  public static function uninstall(string $prog) {
    exec(self::get_user_bin . 'apt-get remove -y ' . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to uninstall: {$prog}");
    return $exit_code;
  }

  public static function add_repo(string $repo) {
    exec(self::get_user_bin . 'add-apt-repository -y -u ' . safe_cmd_quotes($repo) . stderr(), $output, $exit_code);
    display($output); // -u = DO UPDATE once done...
    check_for_error($exit_code, "Unable to uninstall: {$repo}");
    return $exit_code;
  }

  public static function update() {
    exec(self::get_user_bin . 'apt-get update -y ' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  public static function full_update() {
    exec(self::get_user_bin . 'apt-get update -y && '. self::get_user_bin . 'apt-get upgrade -y && ' . self::get_user_bin . 'apt-get autoremove -y && ' . self::get_user_bin . 'apt-get autoclean -y' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  public static function no_sticky_bit(string $file) {
    if (! file_exists($file)) {
      return true;
    }
    exec(self::get_user_bin . 'chmod -s ' . safe_cmd($file), $output, $exit_code);
    check_for_error($exit_code, "Unable to remove sticky bit with chmod: {$file}");
    return $exit_code;
  }
  
  public static function chmod_on_folders(string $dir, $kind) {
    if (!is_dir($dir)) {
      $exit_code = false;
    } else {
      $perm = get_perms($kind);
      exec(self::get_user_bin . 'find ' . safe_cmd($dir) . ' -type d -exec ' . self::get_bin . 'chmod ' . $perm . ' {} \;', $output, $exit_code);
    }
    check_for_error($exit_code, "Unable to chmod folders in: {$dir}");
    return $exit_code;
  }

  public static function chmod_on_files(string $dir, $kind) {
    if (!is_dir($dir)) {
      $exit_code = false;
    } else {
      $perm = get_perms($kind);
      exec(self::get_user_bin . 'find ' . safe_cmd($dir) . ' -type f -exec ' . self::get_bin . 'chmod ' . $perm . ' {} \;', $output, $exit_code);
    }
    check_for_error($exit_code, "Unable to chmod files in: {$dir}");
    return $exit_code;
  }

  public static function write_protect_file(string $file) {
    if (!is_file($file)) {
      $exit_code = false;
    } else {
      exec(self::get_user_bin . 'chattr +i ' . safe_cmd($file), $output, $exit_code);
    }
    check_for_error($exit_code, "Unable to write protect: {$file}");
    return $exit_code;
  }

  public static function unwrite_protect_file(string $file) {
    if (!is_file($file)) {
      $exit_code = false;
    } else {
      exec(self::get_user_bin . 'chattr -i ' . safe_cmd($file), $output, $exit_code);
    }
    check_for_error($exit_code, "Unable to un-write protect: {$file}");
    return $exit_code;
  }

  public static function userdel(string $username) {
    exec(self::get_super_user_bin . 'userdel ' . safe_cmd($username), $output, $exit_code);
    if ($exit_code === true || $exit_code === 0) {
        display(getTermColors("Deleted user account named: $username", ['color'=>'green']));
    }
    check_for_error($exit_code, "Unable to delete user: {$username}");
    return $exit_code;
  }
  
  public static function useradd(string $username, string $shell="/bin/bash", string $comment = "", string $groups="", string $homedir="") {
    $dir = (empty($homedir)) ? " -m " : " -d " . safe_cmd($homedir);
    exec(self::get_super_user_bin . 'useradd -s '. safe_cmd($shell) . $dir . ' -c '. safe_cmd($comment) .'-G'. safe_cmd($groups) . ' ' . safe_cmd($username), $output, $exit_code);
    check_for_error($exit_code, "Unable to add new user: {$username}");
    return $exit_code;
  }
  
  public static function lock_status(string $username) {
    exec(self::get_user_bin . 'passwd -S ' . safe_cmd($username) . " | awk '{print $2}'", $output, $exit_code);
    $sw = $output[0] ?? "";
    switch ($sw) {
        case "P": echo "Account is not locked"; break;
        case "NP": echo "Account has no password"; break;
        case "L": echo "Account is Locked"; break;
        default: echo "Account does not exist?!"; break;
    }
    check_for_error($exit_code, "Unable to view account: {$username}");
    return $exit_code;
  }
  
  public static function passwd(string $username) {
    exec(self::get_user_bin . 'passwd ' . safe_cmd($username), $output, $exit_code);
    check_for_error($exit_code, "Unable to set user password: {$username}");
    return $exit_code;
  }

  // Details about age of passwords
  public static function chage(string $username) {
    exec(self::get_user_bin . 'chage -l ' . safe_cmd($username), $output, $exit_code);
    check_for_error($exit_code, "Unable to view user password changes: {$username}");
    return $exit_code;
  }
  // yyyy-mm-dd      
  public static function lock(string $username, string $expires_on="") {
    $exp = (! empty($expires_on)) ? "--expiredate ". safe_cmd($expires_on) . " " : "";
    exec(self::get_super_user_bin . 'usermod -L '. $exp . safe_cmd($username), $output, $exit_code);
    check_for_error($exit_code, "Unable to Lock user account: {$username}");
    return $exit_code;
  }
  
  public static function unlock(string $username, string $expires_on="") {
    $exp = (! empty($expires_on)) ? "--expiredate ". safe_cmd($expires_on) . " " : "--expiredate '' ";
    exec(self::get_super_user_bin . 'usermod -U ' . $exp . safe_cmd($username), $output, $exit_code);
    check_for_error($exit_code, "Unable to Unlock user account: {$username}");
    return $exit_code;
  }
  
}

// end of neato installer commands