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

# cpanel - scripts/convert_to_dovecot_delivery     Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::convert_to_dovecot_delivery;

use strict;
use Cpanel::CachedDataStore               ();
use Cpanel::Config::LoadCpConf            ();
use Cpanel::Services::Restart             ();
use Cpanel::AdvConfig::Setup              ();
use Cpanel::AdvConfig::dovecot::Constants ();
use Cpanel::SafeRun::Object               ();

our $MIN_SANE_LOGIN_PROCESS_SIZE  = Cpanel::AdvConfig::dovecot::Constants::MINIMUM_LOGIN_PROCESS_SIZE();
our $MIN_SANE_MAIL_PROCESS_SIZE   = Cpanel::AdvConfig::dovecot::Constants::MINIMUM_MAIL_PROCESS_SIZE();
our $RECOMMENDED_CONFIG_VSZ_LIMIT = Cpanel::AdvConfig::dovecot::Constants::RECOMMENDED_CONFIG_VSZ_LIMIT();
our $DEFAULT_PLUGIN_ACL           = Cpanel::AdvConfig::dovecot::Constants::DEFAULT_PLUGIN_ACL();
our $DEFAULT_AUTH_CACHE_SIZE      = Cpanel::AdvConfig::dovecot::Constants::DEFAULT_AUTH_CACHE_SIZE();

our $conf_file = '/var/cpanel/conf/dovecot/main';
exit( __PACKAGE__->script() ) unless caller();

sub script {
    my $dovecot_is_enabled = Cpanel::Config::LoadCpConf::loadcpconf()->{'mailserver'} =~ m{dovecot} ? 1 : 0;
    Cpanel::AdvConfig::Setup::ensure_conf_dir_exists('dovecot');

    my $pop_is_enabled  = _pop_is_enabled_via_touchfile();
    my $imap_is_enabled = _imap_is_enabled_via_touchfile();

    my $dovecot_conf_obj = Cpanel::CachedDataStore::loaddatastore( $conf_file, 1 );    # lock and load
    if ( 'HASH' ne ref $dovecot_conf_obj->{'data'} ) {
        $dovecot_conf_obj->{'data'} = {};
    }
    if ( !$dovecot_is_enabled || ( !$pop_is_enabled && !$imap_is_enabled ) ) {

        # If they had dovecot disabled
        # we want to set the protocols to none
        $dovecot_conf_obj->{'data'}{'protocols'} = 'none';
    }
    elsif ( $imap_is_enabled && $pop_is_enabled ) {

        # Do nothing since this is the default
    }
    elsif ($imap_is_enabled) {
        $dovecot_conf_obj->{'data'}{'protocols'} = 'imap';
    }
    elsif ($pop_is_enabled) {
        $dovecot_conf_obj->{'data'}{'protocols'} = 'pop3';
    }
    if ( $dovecot_conf_obj->{'data'}{'auth_cache_size'} && $dovecot_conf_obj->{'data'}{'auth_cache_size'} !~ tr{M}{} && $dovecot_conf_obj->{'data'}{'auth_cache_size'} < ( 1024**2 ) ) {
        $dovecot_conf_obj->{'data'}{'auth_cache_size'} = $DEFAULT_AUTH_CACHE_SIZE;
    }

    if ( $dovecot_conf_obj->{'data'}{'login_process_size'} && $dovecot_conf_obj->{'data'}{'login_process_size'} < $MIN_SANE_LOGIN_PROCESS_SIZE ) {
        $dovecot_conf_obj->{'data'}{'login_process_size'} = $MIN_SANE_LOGIN_PROCESS_SIZE;
    }

    if ( $dovecot_conf_obj->{'data'}{'mail_process_size'} && $dovecot_conf_obj->{'data'}{'mail_process_size'} < $MIN_SANE_MAIL_PROCESS_SIZE ) {
        $dovecot_conf_obj->{'data'}{'mail_process_size'} = $MIN_SANE_MAIL_PROCESS_SIZE;
    }

    if ( $dovecot_conf_obj->{'data'}{'config_vsz_limit'} && $dovecot_conf_obj->{'data'}{'config_vsz_limit'} < $RECOMMENDED_CONFIG_VSZ_LIMIT ) {
        $dovecot_conf_obj->{'data'}{'config_vsz_limit'} = $RECOMMENDED_CONFIG_VSZ_LIMIT;
    }

    if ( $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} && $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} !~ m{cache} ) {
        $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} = $DEFAULT_PLUGIN_ACL;
    }

    $dovecot_conf_obj->save();

    if ( !$dovecot_is_enabled ) {
        Cpanel::SafeRun::Object->new_or_die( 'program' => '/usr/local/cpanel/scripts/setupmailserver', 'args' => ['disabled'] );
    }

    # Either way we need to get the new settings in
    rebuild_dovecot_conf();
    Cpanel::Services::Restart::restartservice( 'dovecot', 1 );

    return 0;
}

sub _imap_is_enabled_via_touchfile {
    foreach my $imap_disable_file (qw{/etc/imapdisable /etc/imapddisable /etc/cpimapdisable}) {
        if ( -e $imap_disable_file ) { return 0; }
    }
    return 1;
}

sub _pop_is_enabled_via_touchfile {
    foreach my $pop_disable_file (qw{/etc/popdisable /etc/popddisable /etc/cppopdisable /etc/pop3disable}) {
        if ( -e $pop_disable_file ) { return 0; }
    }
    return 1;
}

sub rebuild_dovecot_conf {

    return system('/usr/local/cpanel/scripts/builddovecotconf');
}