#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - SOURCES/007-restatsrv_nginx             Copyright 2021 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 ea_nginx::SOURCES::restartsrv_nginx;

use strict;
use warnings;

use Cpanel::AppPort ();

run(@ARGV) unless caller();

=head1 DESCRIPTION

Ensure nginx is able to bind to port 80/443 by forcing apache to release them if necessary

=cut

sub run {
    my $stopped_apache = 0;
    if ( _is_listening_on_80_or_443('httpd') ) {
        print "Stopping apache …\n";
        system('/usr/local/cpanel/scripts/restartsrv_httpd --stop');
        $stopped_apache = 1;
    }

    # Ensure apache stops before continuing
    if ($stopped_apache) {
        print "Waiting on apache to fully stop before continuing …\n";

        my $httpd_is_listening = 0;
        for ( 1 .. 5 ) {
            $httpd_is_listening = _is_listening_on_80_or_443('httpd');
            last unless $httpd_is_listening;
            select( undef, undef, undef, 0.25 );
        }

        die "Apache is still bound to ports 80/443\n" if $httpd_is_listening;
    }

    # hard restart here in order to ensure that the new binary is used
    # in the event that this is an nginx upgrade
    print "Starting nginx …\n";
    system('/usr/local/cpanel/scripts/restartsrv_nginx --hard');

    print "Waiting on nginx to come up …\n";

    my $nginx_is_listening = 0;
    for ( 1 .. 5 ) {
        $nginx_is_listening = _is_listening_on_80_or_443('nginx');
        last if $nginx_is_listening;
        select( undef, undef, undef, 0.25 );
    }

    die "Nginx was unable to start\n" unless $nginx_is_listening;

    print "Starting apache …\n";
    system('/usr/local/cpanel/scripts/restartsrv_httpd --start');

    print "… done\n";
    return 0;
}

sub _is_listening_on_80_or_443 {
    my ($service) = @_;
    die "_is_listening_on_80_or_443: service arg is required\n" unless $service;

    my @ports = (
        80,
        443,
    );

    my $app_pid_ref = Cpanel::AppPort::get_pids_bound_to_ports( \@ports );
    foreach my $pid ( keys %$app_pid_ref ) {
        return 1 if $app_pid_ref->{$pid}{process} =~ /^\Q$service\E|\/\Q$service\E/;
    }

    return 0;
}

1;