#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/addpop                          Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# [email protected]                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::addpop;

use strict;
use warnings;

use Cpanel::SafetyBits                   ();
use Cpanel::AcctUtils::DomainOwner::Tiny ();
use Cpanel::Usage                        ();
use Cpanel::Validate::VirtualUsername    ();
use Cpanel::Email::Maildir               ();
use Cpanel::Sys::Setsid::Fast            ();
use Cpanel::Hooks                        ();
use Cpanel::Exception                    ();

use constant MAX_QUOTA => Cpanel::Email::Maildir::get_max_email_quota_mib();

my @attributes = qw{ email password quota owner user domain };

run(@ARGV) unless caller();

sub run {
    my (@args) = @_;
    if ( $> != 0 ) {
        die( Cpanel::Exception::create("RootRequired") );
    }
    my $debug;
    my $verbose;
    my $email;
    my $password;
    my $quota;

    my $opts = {
        email    => \$email,
        password => \$password,
        quota    => \$quota,
        debug    => \$debug,
        verbose  => \$verbose,
    };

    Cpanel::Usage::wrap_options( \@args, \&usage, $opts );

    # needed for retro compatibility
    @args = map { m/^\-/ ? undef : $_ } @args;

    # use args* for retro compatibility with old syntax
    my %opts = ( email => $email || $args[0], password => $password || $args[1] || q{}, quota => $quota || $args[3] || 0 );
    my $pop  = scripts::addpop->new(%opts);

    my $interactive_fields = {
        email => 'Please enter the pop account to add (e.g. [email protected])? ',
    };
    foreach my $field ( sort keys %$interactive_fields ) {
        while ( !$pop->$field() ) {
            print $interactive_fields->{$field};
            my $input;
            chomp( $input = <STDIN> );
            $pop->$field($input);
        }
    }

    Cpanel::Hooks::hook(
        {
            'category' => 'scripts',
            'event'    => 'addpop',
            'stage'    => 'pre',
        },
        \%opts,
    );

    $pop->create();

    Cpanel::Hooks::hook(
        {
            'category' => 'scripts',
            'event'    => 'addpop',
            'stage'    => 'post',
        },
        \%opts,
    );

    return;
}

sub usage {
    my $prog      = $0;
    my $max_quota = Cpanel::Email::Maildir::get_max_email_quota_mib();
    print <<USAGE;
$0 [--email=]<user\@domain.com> [[--password=]yourpassword] [[--quota=]quota]

Create the specified email account
    --help  : display this documentation
    --email : a valid address email ( format: user\@domain.com )
    --password : password used for this account, if not provided a prompt will ask for it
    --quota : default quota ( in MB ) is 0 ( unlimited ), any value larger or equal than $max_quota
    will result in using an unlimited quota

Sample usages
    Create an email account using only the email ( password will be asked, and default quota will be used )
    > $0 user\@domain.com
    > $0 user\@domain.com yourpassword
    Create an email with password and quota from command line
    > $0 user\@domain.com yourpassword 1024
    or
    > $0 --email=user\@domain.com --password=yourpassword --quota=1024
USAGE
    exit 1;
}

sub new {
    my ( $package, %opts ) = @_;
    my $self = bless {}, __PACKAGE__;

    # create accessor and hooks
    $self->_set_attributes();

    # set values
    map { $self->$_( $opts{$_} ) } keys %opts;

    return $self;
}

sub _set_attributes {

    # call once at first init
    return unless @attributes;
    foreach my $att (@attributes) {
        my $accessor = __PACKAGE__ . "::$att";

        # allow symbolic refs to typeglob
        no strict 'refs';
        *$accessor = sub {
            my ( $self, $v ) = @_;
            if ( defined $v ) {
                foreach (qw{before validate set after}) {
                    if ( $_ eq 'set' ) {
                        $self->{$att} = $v;
                        next;
                    }
                    my $sub = '_' . $_ . '_' . $att;
                    if ( defined &{ __PACKAGE__ . '::' . $sub } ) {
                        return unless $self->$sub($v);
                    }
                }
            }
            return $self->{$att};
        };
    }
    @attributes = undef;
    return 1;
}

sub _validate_email {
    my ( $self, $email ) = @_;

    unless ( Cpanel::Validate::VirtualUsername::is_valid($email) ) {
        print STDERR "'$email' is not valid for a virtual account username.\n";
        return;
    }
    return 1;
}

sub _validate_quota {
    my ( $self, $value ) = @_;

    $value =~ /^[0-9]+$/ or die "Invalid quota format";
    return 1;
}

sub _after_quota {
    my ($self) = @_;

    # update in place
    $self->{quota} = 0 if $self->quota() >= MAX_QUOTA;
    return 1;
}

sub _after_email {
    my $self = shift;

    my ( $user, $domain ) = split( /\@/, $self->email );
    my $owner = Cpanel::AcctUtils::DomainOwner::Tiny::getdomainowner( $domain, { 'default' => '' } );

    die "Cannot find the owner of $domain, try rebuilding /etc/userdomains first with /usr/local/cpanel/scripts/updateuserdomains" unless $owner;

    $self->owner($owner);
    $self->user($user);
    $self->domain($domain);
    return 1;
}

sub _after_owner {
    my $self = shift;

    my ( $uid, $gid ) = ( getpwnam( $self->owner() ) )[ 2, 3 ];
    die "cannot find user ", $self->owner() unless defined $uid && defined $gid;
    Cpanel::Sys::Setsid::Fast::fast_setsid();
    Cpanel::SafetyBits::setuids( $uid, $gid );
    $ENV{'REMOTE_USER'} = $self->owner();
    return 1;
}

sub create {
    my $self = shift;

    system '/usr/local/cpanel/cpanel-email', 'addpop', $self->user(), $self->password(), $self->quota(), $self->domain();
    die "\nEmail account creation failed ($?)\n" if ( $? != 0 );

    my $quota_text = ( $self->quota() > 0 ) ? $self->quota() . " MB" : 'unlimited';

    print "Created " . $self->email() . " with a quota of $quota_text for user " . $self->owner() . "\n";
    return 1;
}

1;