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#!/usr/local/cpanel/3rdparty/bin/perl
# encoding: utf-8
#
# author: Kyle Yetter
#
# Copyright 2011 Kyle Yetter - InMotion Hosting, Inc. - kyley@inmotionhosting.com
#

=pod

=head1 modify-account

modify-account - Change the basic configuration of a cPanel account.

=head1 SYNOPSIS

modify-account [options] userna5 --property=NEW_VALUE ...

=head1 DESCRIPTION

Change the basic parameters of a cPanel account on this system.

=head1 OPTIONS

=head2 BASIC MODIFICATIONS

=over 8

=item B<-u>, B<--new-user>, B<--user>=I<NEW_NAME>

Change the account's user name to I<NEW_NAME>

=item B<-o>, B<--owner>=I<RESELLER>

Change the owner of the account to I<RESELLER>

=item B<-w>, B<--password>=I<PASSWORD>, B<--pw>=I<PASSWORD>

Change the password of the account to I<RESELLER>

=item B<-d>, B<--domain>=I<DOMAIN>

Change the user's primary domain to I<DOMAIN>

=item B<-t>, B<--theme>=I<THEME>

Change the user's cPanel theme to I<THEME>

=item B<-c>, B<--cgi> / B<-C>, B<--no-cgi>

Disable or enable CGI access for the user

=item B<-s>, B<--shell> / B<-S>, B<--no-shell>

Disable or enable shell/SSH access for the user

=item B<-i>, B<--ip>=I<ADDR|KEYWORD>

Assign IP address I<ADDR> to all domains on the user's account. Valid keywords
include 'shared' or 'free'. Use --man for full details.

=item B<-p>, B<--package>=I<PKG>

Upgrade/downgrade the user's account to the package named I<PKG>

=item B<-b>, B<--bw>, B<--bandwidth>=I<LIMITq>

Apply a bandwidth limit to the given account. The limit value can
be specified with a unit (e.g. `10GB'). If no unit is given,
the value is assumed to be in MB.

=item B<-q>, B<--quota>=I<QUOTA>

Apply a disk space quota to the given account. The quota value can
be specified with a unit (e.g. `10GB'). If no unit is given,
the value is assumed to be in MB.

=back

=head2 RESELLER OPTIONS

=over 8

=item B<-r>, B<--reseller> / B<-R>, B<--no-reseller>

Disable or enable reseller privileges for the user

=item B<-a>, B<--acl>=I<NAME>

Apply the reseller access control list I<NAME> to the user

=item B<--self>, B<--no-self>

Specify whether or not to make the user its own owner when setting up reseller privileges

=item B<--ns>[=I<ns1.dom.com>,I<ns2.dom.com>,...]

Assign default nameserver addresses for account controlled by the user.
If no addresses are specified, use the server-wide default nameservers.

=item B<--custom-ns>=I<dom.com>

Assume a standard custom nameserver set up based off of I<dom.com>.
This sets the reseller nameservers to ns1.I<dom.com> and ns2.I<dom.com>.

=item B<--allow>=I<priv1>,I<priv2>,... / B<--deny>=I<priv1>,I<priv2>,...

Enable or disable the given reseller privileges. The privileges should be specified
in a comma separated list. For a list of valid privilege names, run

    modify-account --list-privileges

=back

=head2 SYSTEM INFORMATION

=over 8

=item B<--list-users>

Print the user name of all cPanel accounts on the server

=item B<--list-themes>

Print the list of known cPanel themes

=item B<--list-ips>

List all IP addresses allocated to the server. The shared (main) IP is
displayed in cyan, free IPs are in green, and used IPs are in red

=item B<--list-packages>

Print the list of package names defined on the server

=item B<--list-resellers>

Print the list of users with reseller privileges on the server

=item B<--list-acls>

Print the list of reseller privilege ACL names defined on the server

=item B<--summary>, B<--info>

Print overall account settings for the given account

=back

=head2 GENERAL OPTIONS

=over 8

=item B<--force>

Bypass the validation checks that are performed before submitting the requested
changes to WHM.

=item B<-D>, B<--debug>

Print the WHM API URI sent to the server and dump the resulting data structure

=item B<-b>, B<--bleach>, B<--no-color>

Do not use color escapes in the output

=item B<--man>

Show full man page documentation for this program.

=item B<-h>, B<--help>

You know the drill

=item B<-v>, B<--version>

Ditto

=back

=head1 NOTES

=head2 IP Assignment

By specifying the B<-i> or B<--ip> option, you can change an account's IP address.
The IP address is assumed to be allocated and running on the server. If it isn't,
modify-account can automatically attempt to add the IP if you specify the IP with
a subnet mask. The two methods of specifying a subnet mask are illustrated below:

    modify-account userna5 -i 1.2.3.4/24
    modify-account userna5 -i 1.2.3.4:255.255.255.0

As a shortcut, you may also specify a keyword instead of an actual IP address.

=over 8

=item B<shared>, B<main>

The account will be assigned with the server's shared IP as found in I</var/cpanel/mainip>

=item B<free>

If any are available, the next unassigned IP address in /etc/ipaddrpool will be
assigned to the account. It's not a good idea to do this on a shared server.

=back

=head1 EXAMPLES

For the examples below, assume I<whoevs5> is a cPanel user
on the server with primary domain I<whoevs.com>

=head2 BASIC MODIFICATIONS

=head3 Changing User Name

    modify-account whoevs5 --user=newuser6
    modify-account whoevs5 -u newuser6

=head3 Changing Primary Domain

    modify-account whoevs5 --domain=new-site.com
    modify-account whoevs5 -d new-site.com

=head3 Upgrading/Downgrading an Account

    modify-account whoevs5 --package=Pro
    modify-account whoevs5 -p Pro

=head3 Fixing Account Ownership

    modify-account whoevs5 --owner=inmotion
    modify-account whoevs5 -o inmotion

=head2 UPGRADES AND DOWNGRADES

=head3 Shared to VPS or Dedicated

    modify-account whoevs5 --reseller --self --cgi --shell -p vps -a vps
    modify-account whoevs5 --reseller --self --cgi --shell -p dedicated -a dedicated

=head3 VPS or Dedicated to Shared

    modify-account whoevs5 --no-reseller -o inmotion -p Power --cgi --no-shell

=head2 WEBSITE TRANSFERS AND ACCOUNT MOVES

=head3 Importing a cPanel Package From Another Host

Assume I<blueuser> is a cPanel package youve downloaded from BlueHost.
On the InMotion side, the user name is I<blueus5> and the
user is on a I<Power> plan.

    /scripts/killacct blueus5 y
    /script/restorepkg blueuser
    modify-account blueuser -u blueus5 -p Power -t x3 --no-reseller --cgi --no-shell

This kills the existing empty I<blueus5> account
B<(MAKE SURE IT'S EMPTY)>, unpacks the I<blueuser>
package that's sitting in F</home>, and then changes
the I<blueuser> account so that it has the following
properties:

    * the user name is blueus5
    * the account is on the Power plan
    * the account has the x3 cPanel theme
    * the account doesn't have reseller privileges
    * but it does have CGI execution privileges
    * and it doesn't have shell access

=cut

BEGIN { unshift @INC, '/usr/local/cpanel'; }

# since the local SSL certificate's probably self-signed, allow the query
# to skip certificate verification
$ENV{'PERL_LWP_SSL_VERIFY_HOSTNAME'} = 0;
our $VERSION = 1.5;

use strict;
use LWP::UserAgent;
use URI;
use File::Basename;
use File::Slurp qw( slurp read_dir );
use Getopt::Long;
use JSON::Syck;
use Data::Dumper;
use Term::ANSIColor;
use Pod::Usage;
use Term::ReadLine;
use Cpanel::Config::LoadCpUserFile ();
use Net::IP qw( ip_bintoip ip_get_mask ip_iptobin );

our $console = undef;

sub tidy($) {
  my ( $str ) = @_;
  $str =~ s(\A\r?\n)();
  $str =~ s(\r?\n[ \t]*\z)();
  $str =~ s(^\s*\| ?)()mg;
  return $str;
}


sub agree($) {
  my ( $question ) = @_;
  $question = "$question [yes/no] ";
  $console ||= Term::ReadLine->new( basename( $0 ) );
  $console->newTTY( \*STDIN, \*STDERR );

  while ( defined( $_ = $console->readline( $question ) ) ) {
    if ( /^y/i ) {
      return 1;
    } elsif ( /^n/i ) {
      return 0;
    } else {
      print STDERR "Please enter `yes' or `no'\n";
    }
  }
  return 0;
}

# this module's missing sometimes, so check if it's available.
# If not, the script will fail in a hard-to-figure-out way.
eval {
  require LWP::Protocol::https;
} or do {
  print STDERR tidy q(
  | The Perl module LWP::Protocol::https is not installed on this system.
  | It can be installed via:
  |   /scripts/perlinstaller LWP::Protocol::https\n
  );

  if ( agree( "Do you want to try and install it now?" ) ) {
    my @command = qw( /scripts/perlinstaller LWP::Protocol::https );
    my $status  = system( @command );

    die "perlinstaller failed with exit status `$status'" unless $status == 0;

    eval { require LWP::Protocol::https; } or do {
      die "the perlinstaller command didn't fail, but I still can't load the LWP::Protocol::https Perl module";
    };
  } else {
    die "cannot run without the LWP::Protocol::https Perl module";
  }
};

####################################################################################################
##################################### Global Options and Values ####################################
####################################################################################################

# display extra debugging info if true
our $debug  = 0;
# if true, don't colorize output with ANSI escape sequences
our $bleach = 0;
# proceed even if there are validation errors
our $force  = 0;
# set to 1 if this script had to create a cPanel access hash
our $created_access_hash = 0;


# stores all error messages accumulated during argument validation
our @errors = ();
# stores warning/info messages accumulated during argument validation
our @warnings = ();


# stores the arguments to the modifyacct API call
our %account_params = ();
# the cPanel user name for the account we're messing with
our $user  = undef;
# the cPanel user data
our $cp_data = undef;
# the cPanel user's domains
our @user_domains;

# set to 0 when a WHM api call fails
our $api_success = 1;
# the WHM access key to authenticate the calls -- read when needed
our $access_key = undef;

# change the user's IP if set to a value
our $ip = undef;
# holds the subnet mask if an IP is going to be added to the server
our $subnet_mask = undef;
# if 1, try to add $ip to the server with $subnet_mask
our $add_ip = 0;

# change the user's package if set to a value
our $package = undef;

# change the user's password
our $password = undef;

# change the user's bandwidth limit if set to a value
our $bandwidth = undef;

# change the user's disk quota if set to a value
our $quota = undef;

# control adding/removing reseller privileges
our $reseller = undef;
# when adding reseller privileges, this specifies whether the user owns itself or not
our $reseller_owns_self = undef;
# apply this reseller privilege ACL to the user when set
our $reseller_acl = undef;
# used to add or remove specific reseller privileges
our %privilege_changes;
# stores default nameserver values
our @nameservers;

# set to true if a summary print out is requested
our $account_summary = undef;

# check whether this is an IMH/HUB shared server to impose extra precautions
our $on_shared = 0;
our $server_name = `hostname`;
chomp( $server_name );
$server_name =~ s(\.(inmotionhosting|webhostinghub)\.com$)()i;
if ( $server_name =~ /^((?:ec)?biz|edge|[ew]?hub|gs|ld|sb)\d+/i ) {
  $on_shared = 1;
}


END {
  #
  # If we had to create a temporary access hash to make this work,
  # make sure it gets trashed
  #
  if ( -f '/root/.accesshash' && $created_access_hash ) {
    unlink( '/root/.accesshash' ) or die( "failed to remove /root/.accesshash" );
  }

}



####################################################################################################
##################################### Global Utility Functions #####################################
####################################################################################################


sub c($$) {
  my ( $str, $style ) = @_;
  $str = colored( $str, $style ) unless $bleach;
  return $str;
}

sub d {
  if ( $debug ) {
    my ( $fmt, @params ) = @_;
    local $\ = "\n";

    my $message = c( sprintf( $fmt, @params ), 'cyan' );
    print STDERR "DEBUG: $message";
  }
}


sub read_delimited($$) {
  my $path = shift;
  my $delim = shift;
  my %data;

  for ( slurp( $path ) ) {
    chomp;
    s(^\s+|\s+$)()g;           # strip the line
    next if /^\s*(?:#.*)?$/;   # skip over blank and comment lines
    my ( $key, $value ) = split( /$delim/, $_, 2 );
    $data{$key} = $value;
  }

  return %data;
}


####################################################################################################
#################################### Validation Helper Variables ###################################
####################################################################################################

our $domain_rx = qr((?:(?:[a-z0-9](?:[a-z0-9\-]*[a-z0-9])?)\.)*(?:[a-z0-9](?:[a-z0-9\-]*[a-z0-9])?)(?:\.(?:m(?:[acdeghkmnpqrstvwxyz]|u(?:seum)?|o(?:bi)?|i?l)|a(?:[cdfgilmnoqtuwxz]|e(?:ro)?|r(?:pa)?|s(?:ia)?)|c(?:[cdfghiklmnruvxyz]|o(?:op|m)?|at?)|t(?:[cdfghjkmnoptvwz]|r(?:avel)?|e?l)|n(?:[cfgilopruz]|a(?:me)?|et?)|b(?:[abdefghjmnorstvwyz]|iz?)|g(?:[abdefghilmnpqrstuwy]|ov)|i(?:[delmoqrst]|n(?:fo|t)?)|p(?:[aefghklmnstwy]|ro?)|s[abcdeghijklmnortuvyz]|j(?:[emp]|o(?:bs)?)|e(?:[cegrst]|d?u)|k[eghimnprwyz]|l[abcikrstuvy]|v[aceginu]|d[ejkmoz]|f[ijkmor]|h[kmnrtu]|o(?:rg|m)|u[agksyz]|r[eosuw]|z[amw]|w[fs]|y[et]|qa))+)i;
our $ip_rx = qr(^(?:(?:2(?:[0-4]\d|5[0-5])|1\d{2}|\d{1,2})\.){3}(?:2(?:[0-4][0-9]|5[0-5])|1\d{2}|\d{1,2})$);
our $netmask_rx = qr(^1+0+$);

our %lazy_load;
our %themes;

sub load_themes {
  unless ( $lazy_load{ themes } ) {
    %themes = map { basename( $_ ) => 1 } glob( "/var/cpanel/locale/themes/*/" );
    $lazy_load{ themes } = 1;
  }
  return %themes;
}

our %ip_addresses;
our @ip_pool;
our $shared_ip;
our %used_ips;

sub load_ips {
  unless ( $lazy_load{ ips } ) {
    if ( -f "/var/cpanel/mainip" ) {
      $shared_ip = slurp( "/var/cpanel/mainip" );
      chomp( $shared_ip );
      $ip_addresses{ $shared_ip } = 1;
    } else {
      d "cannot obtain shared IP: /var/cpanel/mainip does not exist";
    }

    if ( -f "/etc/ips" ) {
      for my $entry ( slurp( "/etc/ips" ) ) {
        my ( $ip ) = split( ':', $entry );
        $ip_addresses{ $ip } = 1;
      }
    }

    if ( -f "/etc/domainips" ) {
      for my $entry ( slurp( "/etc/domainips" ) ) {
        chomp $entry;
        my ( $ip, $domain ) = split( /\s*:\s*/, $entry, 2 );
        $used_ips{ $ip } ||= $domain;
      }
    }

    if ( -f "/etc/ipaddrpool" ) {
      for my $ip ( slurp( "/etc/ipaddrpool" ) ) {
        chomp $ip;
        push( @ip_pool, $ip ) unless $used_ips{ $ip };
        $ip_addresses{ $ip } = 1;
      }
    }

    $lazy_load{ ips } = 1;
  }

  return %ip_addresses;
}

our %ssl_domains;

sub load_ssl {
  unless ( $lazy_load{ ssl } ) {
    if ( -f "/etc/ssldomains" ) {
      %ssl_domains = read_delimited( "/etc/ssldomains", '\s*:\s*' );
    } else {
      d "cannot obtain SSL domains: /etc/ssldomains does not exist";
    }
    $lazy_load{ ssl } = 1;
  }

  return %ssl_domains;
}

our %packages;

sub load_packages {
  unless ( $lazy_load{ packages } ) {
    my $package_dir = "/var/cpanel/packages";
    if ( -d $package_dir ) {
      my @package_names = grep { -f "$package_dir/$_" } read_dir( $package_dir );
      for my $name ( @package_names ) {
        my $lower = lc( $name );
        if ( $packages{ $lower } ) {
          warn tidy qq(
          | This server has packages with overlapping names:
          |   - $packages{$lower}
          |   - $name
          | If you specify `$lower' as the package name, `$name' will be used
          );
        }
        $packages{ $lower } = $name;
      }
    }

    $lazy_load{ packages } = 1;
  }

  return %packages;
}

our %resellers;
our %reseller_acls;

# the set of all known cPanel reseller privilege names
our %PRIVILEGE_NAMES = map { $_ => 1 } qw(
  add-pkg                    edit-dns               rearrange-accts
  add-pkg-ip                 edit-mx                res-cart
  add-pkg-shell              edit-pkg               resftp
  all                        frontpage              restart
  allow-addoncreate          kill-acct              show-bandwidth
  allow-parkedcreate         kill-dns               ssl
  allow-unlimited-bw-pkgs    limit-bandwidth        ssl-buy
  allow-unlimited-disk-pkgs  list-accts             ssl-gencrt
  allow-unlimited-pkgs       mailcheck              stats
  clustering                 mod-subdomains         status
  create-acct                news                   suspend-accts
  create-dns                 onlyselfandglobalpkgs  thirdparty
  demo-setup                 park-dns               upgrade-account
  disallow-shell             passwd                 viewglobalpackages
  edit-account               quota
);

sub load_resellers {
  delete $lazy_load{ resellers } if $_[ 0 ];  # force reload

  unless ( $lazy_load{ resellers } ) {
    %resellers = ();
    %reseller_acls = ();

    if ( -f "/var/cpanel/resellers" ) {
      for ( slurp( "/var/cpanel/resellers" ) ) {
        chomp;
        my ( $reseller, $priv_list ) = split( /\s*:\s*/, $_, 2 );

        my %privs;
        $priv_list =~ s(^\s+|\s+$)()g;
        $privs{ $_ } = 1 for split( /\s*,\s*/, $priv_list );

        $resellers{ $reseller } = \%privs;
      }
    }
    $resellers{ 'root' } = 1;

    my $acl_dir = "/var/cpanel/acllists";
    if ( -d $acl_dir ) {
      my @acl_names = grep { -f "$acl_dir/$_" } read_dir( $acl_dir );

      for my $name ( @acl_names ) {
        my $lower = lc( $name );
        if ( $reseller_acls{ $lower } ) {
          warn tidy qq(
          | This server has packages with overlapping names:
          |   - $reseller_acls{$lower}
          |   - $name
          | If you specify `$lower' as the package name, `$name' will be used
          );
        }
        $reseller_acls{ $lower } = $name;
      }
    }

    $lazy_load{ resellers } = 1;
  }

  return %resellers;
}


our %users;

sub load_users {
  unless ( $lazy_load{ users } ) {
    my $user_dir = "/var/cpanel/users";
    if ( -d $user_dir ) {
      my @user_names = grep { -f "$user_dir/$_" } read_dir( $user_dir );
      %users = map { $_ => 1 } @user_names;
    }
    $lazy_load{ users } = 1;
  }

  return %users
}

our %server_config;
our @default_nameservers;

sub load_server_config {
  unless ( $lazy_load{ server_config } ) {
    if ( -f "/etc/wwwacct.conf" ) {
      %server_config = read_delimited( '/etc/wwwacct.conf', '\s+' );
      my @ns_keys = qw( NS NS2 NS3 NS4 );
      for ( @ns_keys ) {
        my $ns_address = $server_config{ $_ };
        $ns_address and push( @default_nameservers, $ns_address );
      }
    }

    $lazy_load{ server_config } = 1;
  }
  return %server_config;
}

sub who_owns( $ ) {
  my $domain = quotemeta( shift );
  my $user   = undef;

  open( USERDOMAINS, "/etc/userdomains" ) or die "could not open /etc/userdomains: $!";

  SEARCH:
    while( <USERDOMAINS> ) {
      if ( /^$domain: (\S+)/i ) {
        $user = $1;
        last SEARCH;
      }
    }

  close( USERDOMAINS );

  return $user;
}

####################################################################################################
##################################### Formatting/Output Helpers ####################################
####################################################################################################

our @BYTE_UNITS      = qw( TB GB MB KB B );
our %BYTE_UNIT_ORDER = ();

for ( 0 .. $#BYTE_UNITS ) {
  $BYTE_UNIT_ORDER{ $BYTE_UNITS[ $_ ] } = 2 ** ( 10 * ( $#BYTE_UNITS - $_ ) );
}

our %BYTE_UNIT_PRECISION = {
  TB => 2,  GB => 2,  MB => 1,
  KB => 0,  B  => 0
};

sub parse_bytes($;$$) {
  my ( $byte_string, $target_unit, $default_unit ) = @_;

  $byte_string    = uc( $byte_string );
  $target_unit  ||= uc( $default_unit || 'B' );
  $default_unit ||= uc( $default_unit || $target_unit );

  unless ( exists $BYTE_UNIT_ORDER{ $default_unit } ) {
    die "invalid unit name provided as the default unit: `$default_unit'";
  }
  my ( $value, $unit );

  if ( $byte_string =~ /^\s*(\d*\.\d+|\d+)\s*([TKGM]?B)?/i ) {
    ( $value, $unit ) = ( $1, $2 );
    $value +=  0;            # convert string to float
  } elsif ( $byte_string =~ /(\d*\.\d+|\d+)/ ) {
    $value = $1 + 0;
  }
  return convert_bytes( $value, $unit || $default_unit, $target_unit );
}

sub convert_bytes($$;$) {
  my ( $value, $from_unit, $to_unit ) = @_;
  $to_unit ||= 'B';
  $from_unit = uc( $from_unit );
  $to_unit   = uc( $to_unit );

  exists $BYTE_UNIT_ORDER{ $from_unit } or
    die "invalid byte unit name provided: `$from_unit'";
  exists $BYTE_UNIT_ORDER{ $to_unit } or
    die "invalid byte unit name provided: `$to_unit'";

  my $factor = $BYTE_UNIT_ORDER{ $from_unit } / $BYTE_UNIT_ORDER{ $to_unit };
  return $value * $factor
}


sub byte_format($) {
  my $bytes = shift;
  my $size  = $bytes / ( 1024.0 ** $#BYTE_UNITS );

  for my $unit ( @BYTE_UNITS ) {
    if ( $size >= 1 ) {
      my $precision = $BYTE_UNIT_PRECISION{ $unit };
      return sprintf( "%.${precision}f %2s", $size, $unit );
    }
    $size *= 1024;
  }

  return "$bytes B ";
}

sub center($$) {
  my ( $string, $width ) = @_;
  my $len = length( $string );
  return $string if $width <= $len;

  my $padding = $width - $len;
  my $left = int( $padding / 2 );
  my $right = $left + $padding % 2;

  return( ( ' ' x $left ) . $string . ( ' ' x $right ) );
}

sub print_list_item($$) {
  local $\ = "\n";
  my $text = shift;
  $text =~ s(\s+\z)();
  my $color = shift;
  my @lines = split( /\r?\n/, $text );
  my $main = shift( @lines );

  print c( "* $main", $color );
  for ( @lines ) {
    print "  - $_";
  }
}

sub print_table {
  local $\ = "\n";

  my @rows = @_;
  my @arrays;
  my @titles;
  my $title = undef;

  for my $item ( @rows ) {
    if ( ref( $item ) eq 'ARRAY' ) {
      push( @arrays, $item );
    } elsif ( ref( \$item ) eq "SCALAR" ) {
      push( @titles, $item );
    }
  }

  unless ( @arrays ) {
    $@ = "print_table: no rows provided";
    return;
  }

  my $ncols = scalar( @{$arrays[ 0 ]} );
  my @widths;

  for my $c ( 0 .. ( $ncols - 1 ) ) {
    my $w = 0;
    for my $row ( @arrays ) {
      my $col = $row->[$c];
      my $col_width = length( $col );
      if ( $w < $col_width ) { $w = $col_width; }
    }
    $widths[ $c ] = $w;
  }

  my $inner_width = ( $ncols - 1 ) * 3;
  $inner_width += $_ for @widths;

  if ( @titles ) {
    my $title_width = 0;
    for my $t ( @titles ) {
      my $l = length( $t );
      $title_width = $l if $l > $title_width;
    }

    if ( $title_width > $inner_width ) {
      $widths[-1] += $title_width - $inner_width;
      $inner_width = $title_width;
    }
  }

  if ( ref( \$rows[0] ) eq "SCALAR" ) {
    $title = shift( @rows );

    print( '+-' . ( '-' x $inner_width ) . '-+' );
    print( '| ' . center( $title, $inner_width ) . ' |' );
  }

  my $mask    = '| ' . join( " | ", map { "%-${_}s" } @widths ) . " |";
  my $border  = '+-' . join( "-+-", map { '-' x $_  } @widths ) . "-+";
  my $outline = '+-' . ( '-' x $inner_width ) . '-+';

  my $after_title = 1;
  for my $row ( @rows ) {
    if ( ref( $row ) eq 'ARRAY' ) {
      print( $border ) if $after_title;
      print( sprintf( $mask, @{ $row } ) );
      $after_title = 0;
    } elsif ( ref( \$row ) eq 'SCALAR' ) {
      print( $after_title ? $outline : $border );
      print( '| ' . center( $row, $inner_width ) . ' |' );
      $after_title = 1;
    }
  }

  print( $after_title ? $outline : $border );
}

sub print_user_config( $ ) {
  my $config = shift;
  my $attrs  = $config->{ cpuser };
  my @table = ();

  push( @table, [ "User", $config->{ user } ] );
  push( @table, [ "Domain", $config->{ domain } ] );
  push( @table, [ "Shell Access", $config->{ setshell } ] );

  my @keys = sort keys( %$attrs );
  for my $key ( @keys ) {
    my $value = $attrs->{ $key };
    unless ( $key eq "DOMAINS" or $key eq "DEADDOMAINS" ) {
      push( @table, [ $key, "$value" ] );
    }
  }

  print_table( "Updated Configuration", @table );
}


sub show_usage(;$) {
  my $message = shift;
  $message ? pod2usage( -msg => c( $message, 'red' ), -exitval => 1 ) : pod2usage( 0 );
}


sub compare_ips($$) {
  my ( $a, $b ) = @_;
  my @a_parts = split( /\./, $a, 4 );
  my @b_parts = split( /\./, $b, 4 );

  for my $i ( 0..3 ) {
    my $ai = $a_parts[ $i ] + 0;
    my $bi = $b_parts[ $i ] + 0;
    my $c  = $ai <=> $bi;
    if ( $c ) { return $c; }
  }
  return 0;
}


####################################################################################################
######################################### WHM API Functions ########################################
####################################################################################################

sub access_key {
  if ( $access_key ) { return $access_key; }

  unless ( -f '/root/.accesshash' ) {
    $ENV{ REMOTE_USER } = 'root';
    `/usr/local/cpanel/bin/mkaccesshash`;
    delete $ENV{ REMOTE_USER };
    $created_access_hash = 1;
  }

  if ( -f '/root/.accesshash' ) {
    $access_key = slurp( "/root/.accesshash" ) or die "could not read /root/.accesshash: $!";
    $access_key =~ s/\n//g;
  } else {
    die "could not read /root/.accesshash: $!";
  }

  return $access_key;
}

sub load_json($) {
  my ( $source ) = @_;
  my $data;
  eval { $data = JSON::Syck::Load( $source ); };
  if ( $@ ) {
    die( $@ . "\nJSON SOURCE:\n" . $source );
  }
  return $data;
}

sub api_report($$) {
  my $function    = shift;
  my $result      = shift;

  my $success     = $result->{ status } + 0;  # 0 if failed, 1 if succeeded
  my $message     = $result->{ statusmsg };
  my $warnings    = $result->{ warnings };
  my $messages    = $result->{ messages } || $result->{ msgs };
  my $status      = $result->{ status } + 0;  # 0 if failed, 1 if succeeded
  my $user_config = $result->{ newcfg };
  my $output      = $result->{ rawout };

  print c( $function, "cyan underline" ), "\n";
  print c( $message, $success ? 'green' : 'red' ), "\n";

  if ( $warnings ) { print_list_item( $_, "magenta" ) for @$warnings };
  if ( $messages ) {
    if ( ref( $messages ) eq 'ARRAY' ) {
      print_list_item( $_, "yellow" ) for @$messages
    } else {
      print_list_item( $messages, "yellow" );
    }
  };
  if ( $output   ) { print $output, "\n"; }
  if ( $user_config ) { print_user_config( $user_config ); }
}



sub api_call($%) {
  my $function = shift;
  my %params = @_;

  my $direct = 0;
  if ( exists $params{ -direct } ) {
    $direct = $params{ -direct };
    delete $params{ -direct };
  }

  my $uri = URI->new( "https://127.0.0.1:2087/json-api/$function" );
  $uri->query_form( %params );
  d "query URI: %s", $uri;

  # read the WHM access key

  my $auth = "WHM root:" . access_key;
  my $ua = LWP::UserAgent->new;
  my $request =
    HTTP::Request->new( GET => "$uri" );

  $ua->timeout(300);
  $request->header( Authorization => $auth );
  my $response = $ua->request( $request );

  my $data = load_json( $response->content );
  d "json data:\n%s", Dumper( $data ) if $debug; # keeps the Dumper call from executing unless totally necessary

  return $data if $direct;

  my $result  = exists $data->{ result } ? $data->{ result } : $data;
  ref( $result ) eq "ARRAY" and $result = $result->[ 0 ];
  my $success = $result->{ status } + 0;  # 0 if failed, 1 if succeeded
  api_report( $function, $result );

  $api_success &= $success;
  return $result;
}

####################################################################################################
####################################### Command Line Parsing #######################################
####################################################################################################

# if no arguments whatsoever are provided, show the man page documentation
unless ( @ARGV ) {
  pod2usage({
    -exitval => 1,
    -verbose => 2
  });
}

my $option_parser = new Getopt::Long::Parser;

$option_parser->configure( 'bundling' );

$option_parser->getoptions(
  'list-themes' => sub {
    load_themes;
    print "$_\n" for sort keys %themes;
    exit( 0 );
  },

  'list-packages' => sub {
    load_packages;
    print "$_\n" for sort keys %packages;
    exit( 0 );
  },

  'list-resellers' => sub {
    load_resellers;
    print "$_\n" for sort keys %resellers;
    exit( 0 );
  },

  'list-acls' => sub {
    load_resellers;
    print "$_\n" for sort keys %reseller_acls;
    exit( 0 );
  },

  'list-ips' => sub {
    load_ips;
    my @ips = sort { compare_ips( $a, $b ) } keys( %ip_addresses );
    for my $ip ( @ips ) {
      if ( $ip eq $shared_ip ) {
        print c( "$ip\t(main)", 'cyan' ), "\n";
      } elsif ( $used_ips{ $ip } ) {
        print c( $ip, 'red' ), "\n";
      } else {
        print c( $ip, 'green' ), "\n";
      }
    }
    exit( 0 );
  },

  'list-privileges' => sub {
    print "$_\n" for sort keys %PRIVILEGE_NAMES;
    exit( 0 );
  },


  'list-users' => sub {
    load_users;
    print "$_\n" for sort keys( %users );
    exit( 0 );
  },

  'no-color|bleach|b' => \$bleach,
  'debug|D' => \$debug,

  'domain|d=s' => sub {
    my ( $opt, $value ) = @_;
    # TODO: add validation for the domain name argument
    $account_params{ domain } = $value;
  },

  'new-user|user|u=s' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ newuser } = $value;
  },

  'owner|o=s' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ owner } = $value;
  },

  'theme|t=s' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ CPTHEME } = $value;
  },

  'self!' => sub {
    my ( $opt, $value ) = @_;
    $reseller_owns_self = $value;
  },

  'max-ftp=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXFTP } = "$value";
  },

  'max-sql=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXSQL } = "$value";
  },

  'max-pop=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXPOP } = "$value";
  },

  'max-park=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXPARK } = "$value";
  },

  'max-sub=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXSUB } = "$value";
  },

  'max-addon=i' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ MAXADDON } = "$value";
  },

  'c|cgi!' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ HASCGI } = "$value";
  },

  'C' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ HASCGI } = "0";
  },

  's|shell!' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ shell } = "$value";
  },

  'S' => sub {
    my ( $opt, $value ) = @_;
    $account_params{ shell } = "0";
  },

  'r|reseller!' => sub {
    my ( $opt, $value ) = @_;
    $reseller = $value ? 'on' : 'off';
  },

  'R' => sub {
    my ( $opt, $value ) = @_;
    $reseller = 'off';
  },

  'acl|a=s' => \$reseller_acl,

  'ns:s' => sub {
    my ( $opt, $value ) = @_;
    if ( $value ) {
      push( @nameservers, $_ ) for split( /\s*,\s*|\s+/, $value );
    } else {
      load_server_config;
      @nameservers = @default_nameservers;
    }
  },

  'custom-ns=s' => sub {
    my ( $opt, $value ) = @_;
    @nameservers = ( "ns1.$value", "ns2.$value" );
  },

  'allow=s' => sub {
    my ( $opt, $value ) = @_;
    $value =~ s/^s+|\s+$//g;
    $privilege_changes{ $_ } = 1 for split( /\s*,\s*|\s+/, $value );
  },

  'deny=s' => sub {
    my ( $opt, $value ) = @_;
    $value =~ s/^s+|\s+$//g;
    $privilege_changes{ $_ } = 0 for split( /\s*,\s*|\s+/, $value );
  },

  'ip|i=s' => \$ip,
  'package|p=s' => \$package,

  'password|pw|w=s' => \$password,

  'bandwidth|bw|b=s' => sub {
    my ( $opt, $value ) = @_;
    $bandwidth = int( parse_bytes( $value, 'MB' ) );
  },

  'quota|q=s' => sub {
    my ( $opt, $value ) = @_;
    $quota = int( parse_bytes( $value, 'MB' ) );
  },

  'force' => \$force,
  'info|summary' => \$account_summary,
  'help|h' => sub { show_usage(); },
  'man' => sub {
    pod2usage({
      -exitval => 0,
      -verbose => 2
    })
  },

  'version|v' => sub {
    print "$VERSION\n";
    exit( 0 );
  }
);


$user = shift( @ARGV ) or show_usage( "specify a cPanel user name" );

unless ( -f "/var/cpanel/users/$user" ) {
  die "`$user' is not an existing cPanel user";
}

$cp_data = Cpanel::Config::LoadCpUserFile::loadcpuserfile( $user );
@user_domains = ( $cp_data->{ 'DOMAIN' }, @{ $cp_data->{ 'DOMAINS' } } );

####################################################################################################
######################################## Argument Validation #######################################
####################################################################################################

# New primary domain
if ( my $domain = $account_params{ domain } ) {
  if ( $domain !~ /$domain_rx/i ) {
    push( @errors, "`$domain' is not a valid domain name" );
  } elsif ( my $owner = who_owns( $domain ) ) {
    push( @errors, "`$domain' is already owned by user `$owner'" );
  }
}

# New user name
if ( my $new_user = $account_params{ newuser } ) {
  if ( $new_user !~ /^[a-z][a-z\d]*$/i ) {
    push(
      @errors,
      "Bad user name `$new_user': must be entirely alphanumeric, starting with a letter"
    );
  } elsif ( length( $new_user ) > 8 ) {
    push(
      @errors,
      "Bad user name `$new_user': must be 8 or less characters in length"
    );
  } elsif ( -f "/var/cpanel/users/$new_user" ) {
    push( @errors, "user `$new_user' already exists on the system" );
  }
}

# Changing reseller ownership
if ( my $owner = $account_params{ owner } ) {
  load_resellers;

  unless ( $owner eq 'root' or exists $resellers{ $owner } ) {
    unless ( $owner eq $user and $reseller eq 'on' ) {
      push( @errors, "`$owner' is not an existing reseller account" );
    }
  }
}

# Changing cPanel theme
if ( my $theme = $account_params{ CPTHEME } ) {
  load_themes;
  exists $themes{ $theme } or
    push( @errors, "unknown cPanel theme name `$theme'" );
}

# Switching cPanel package
if ( $package ) {
  load_packages;

  if ( my $pname = $packages{ $package } || $packages{ lc( $package ) } ) {
    $package = $pname;
  } else {
    push( @errors, "unknown package name: `$package'" );
  }
}

# Applying a reseller ACL
if ( $reseller_acl ) {
  load_resellers;
  if ( my $aname = $reseller_acls{ $reseller_acl } || $reseller_acls{ lc( $reseller_acl ) } ) {
    $reseller_acl = $aname;
  } else {
    push( @errors, "unknown reseller ACL name: `$reseller_acl'" );
  }
}

# Changing account IP
if ( $ip ) {
  load_ips;

  ( $ip, $subnet_mask ) = split( /[\/:\s]+/, $ip, 2 );

  my $current_ip = $cp_data->{ 'IP' };

  if ( $ip =~ /^(main|shared)$/i ) {
    push( @errors, "could not identify the server's shared ip" ) unless ( $shared_ip );
    $ip = $shared_ip;
  } elsif ( $ip =~ /^(free|next)$/i ) {
    unless ( @ip_pool ) {
      push( @errors, "no free IPs found in the server's ip address pool" );
    }
    $ip = $ip_pool[ 0 ];
  } elsif ( $ip !~ /$ip_rx/ ) {
    push( @errors, "`$ip' is not a valid IP address" );
  } elsif ( !exists $ip_addresses{ $ip } ) {
    if ( $subnet_mask ) {
      if ( $subnet_mask =~ /^(\d+)$/ ) {
        my $prefix = $1 + 0;
        if ( $prefix < 32 ) {
          push( @errors, "invalid subnet prefix value: `$prefix' (must be between 0 and 32)" );
        } else {
          $subnet_mask = ip_bintoip( ip_get_mask( $prefix, 4 ), 4 );
          $add_ip = 1;
        }
      } elsif ( $subnet_mask =~ /$ip_rx/ && ip_iptobin($subnet_mask, 4) =~ /$netmask_rx/ ) {
        $add_ip = 1;
      } else {
        push @errors, "invalid subnet mask provided: `$subnet_mask'";
      }
    } else {
      push(
        @errors,
        tidy qq(
        | `$ip' does not seem to configured on the server.
        | To add it to the server, specify a subnet mask.
        )
      );
    }
  }

  if ( $add_ip ) {
    # TODO: ping the IP to check if it's assigned somewhere already
  }

  if ( $current_ip eq $ip ) {
    push( @warnings, "$user is already assigned to $ip, so it will not be changed" );
    $ip = undef;
  } else {

    # this is a legitimate IP change
    if ( $ip eq $shared_ip ) {
      # check if the account has SSL installed. If it does, switching to the
      # shared IP will overwrite the shared SSL. Don't do it

      load_ssl;

      for my $dom ( @user_domains ) {
        if ( exists $ssl_domains{ $dom } ) {
          push( @errors, "$user's domain `$dom' has an SSL certificate installed. Switching to the shared IP will overwrite the shared SSL certificate." );
          $ip = undef;
          last;
        }
      }

    } else {

      # make sure no one else already has this IP
      if ( my $owner = $used_ips{ $ip } ) {
        my $uname = who_owns( $owner ) || 'unknown';
        push( @errors, "`$ip' is already assigned to $owner ($uname)" );
      }

    }
  }
}

if ( %privilege_changes ) {
  for my $priv_name ( keys %privilege_changes ) {
    exists $PRIVILEGE_NAMES{ $priv_name } or
      die "invalid privilege name: `$priv_name'";
  }
}

if ( $on_shared ) {
  if ( $reseller eq 'on' ) {
    push( @errors, "do not apply reseller privileges to a user on a shared server" );
  }

  if ( $account_params{ shell } eq '1' and $server_name !~ /^edge/i ) {
    push( @errors, "do not grant shell access to users on a shared server" );
  }

  if ( $account_params{ cgi } eq '0' ) {
    push( @warnings, "you are stripping CGI access from `$user'" );
  }
}

for ( @warnings ) { print STDERR c( "- $_\n", 'yellow' ); }

if ( @errors ) {
  if ( $force ) {
    for ( @errors ) { print STDERR c( "- $_\n", 'yellow' ); }
  } else {
    print STDERR c(
      "Cannot make the requested modification due to the following errors:\n",
      'red'
    );
    for ( @errors ) { print STDERR c( "- $_\n", 'yellow' ); }
    print STDERR c(
      "If you really want to apply these changes, specify the --force flag\n",
      'red'
    );

    exit scalar( @errors );
  }
}

####################################################################################################
###################################### WHM API Call Execution ######################################
####################################################################################################

if ( $add_ip ) {
  api_call( 'addip', ip => $ip, netmask => $subnet_mask );
}

if ( $package ) {
  api_call( 'changepackage', user => $user, pkg => $package );
}

if ( $password ) {
  api_call( 'passwd', user => $user, pass => $password, db_pass_update => 1 );
}

if ( $ip ) {
  api_call( 'setsiteip', user => $user, ip => $ip  );
}

if ( defined $bandwidth ) {
  api_call( 'limitbw', user => $user, bwlimit => "$bandwidth" );
}

if ( defined $quota ) {
  api_call( 'editquota', user => $user, quota => "$quota" );
}

if ( $reseller ) {
  my %reseller_arguments = ( user => $user );
  if ( $reseller eq 'on' ) {
    $reseller_arguments{ makeowner } = $reseller_owns_self if defined $reseller_owns_self;
    api_call( 'setupreseller', %reseller_arguments );
  } elsif ( $reseller eq 'off' ) {
    api_call( 'unsetupreseller', %reseller_arguments );
  }
}

if ( $reseller_acl ) {
  api_call( 'setacls', reseller => $user, acllist => $reseller_acl );
}

if ( @nameservers ) {
  my $ns_spec = join( ',', @nameservers );
  api_call( 'setresellernameservers', user => $user, nameservers => $ns_spec );
}

if ( %privilege_changes ) {
  load_resellers( 1 );  # force reload of reseller privileges, since they may have changed

  my %privs = %{ $resellers{ $user } };
  while ( my ( $priv_name, $enabled ) = each( %privs ) ) {
    if ( $enabled ) {
      $privs{ $priv_name } = 1;
    } else {
      delete $privs{ $priv_name };
    }
  }

  my %params = ( reseller => $user );
  for my $priv_name ( keys %privs ) {
    $params{ "acl-$priv_name" } = "1";
  }

  api_call( 'setacls', %params );
}

if ( %account_params ) {
  api_call( 'modifyacct', %account_params, user => $user );
}

if ( $account_summary ) {
  my $report = api_call( 'accountsummary', user => $user, -direct => 1 );
  my $summary = $report->{ acct };
  $summary = $summary->[ 0 ] if $summary;

  if ( $summary ) {
    my @basic_properties = qw( domain email owner ip theme shell );
    my @rows = ( $summary->{ user } );

    for my $prop ( @basic_properties ) {
      my $value = $summary->{ $prop };
      push( @rows, [ $prop, $value ] );
    }

    my @plan_properties  = qw( plan maxaddons maxparked maxsub maxsql maxpop maxftp );
    push( @rows, "Package" );
    for my $prop ( @plan_properties ) {
      my $value = $summary->{ $prop };
      push( @rows, [ $prop, $value ] );
    }

    my @disk_properties  = qw( partition disklimit diskused );
    push( @rows, "Disk" );
    for my $prop ( @disk_properties ) {
      my $value = $summary->{ $prop };
      push( @rows, [ $prop, $value ] );
    }

    print_table( @rows );
  }
}


exit( !$api_success );