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use warnings;
use strict;

package RT::PlackRunner;

use base 'Plack::Runner';

sub new {
    my $class = shift;
    return $class->SUPER::new( default_middleware => 0, @_ );
}

sub parse_options {
    my $self = shift;
    my @args = @_;
    # handle "rt-server 8888" for back-compat, but complain about it
    if (@args && $args[0] =~ m/^\d+$/) {
        warn "Deprecated: please run $0 --port $ARGV[0] instead\n";
        unshift @args, '--port';
    }

    $self->SUPER::parse_options(@args);

    $self->{app}    ||= $self->app;
    $self->{server} ||= $self->loader->guess;

    my %args = @{$self->{options}};
    if ($self->{server} eq "FCGI") {
        # We deal with the possible failure modes of this in ->run
    } elsif ($args{port}) {
        $self->{explicit_port} = 1;
        my $old_app = $self->{app};
        $self->{app} = sub {
            my $env = shift;
            $env->{'rt.explicit_port'} = $args{port};
            $old_app->($env, @_);
        };
    } else {
        $self->set_options(port => (RT->Config->Get('WebPort') || '8080'));
    }
}

# Don't assume port 5000 with no port or socket supplied; this allows
# the WebPort default to kick in (above), and also to provide useful
# error messages when starting FCGI without any options.
sub mangle_host_port_socket {
    my $self = shift;
    my ($host, $port, $socket, @listen) = @_;
    return $self->SUPER::mangle_host_port_socket(@_)
        if @listen or $port or $socket;

    return host => $host, port => $port, socket => $socket,
        @listen ? (listen => \@listen) : ();
}

sub app {
    require RT::Interface::Web::Handler;
    my $app = RT::Interface::Web::Handler->PSGIApp;

    if ($ENV{RT_TESTING}) {
        my $screen_logger = $RT::Logger->remove('screen');
        require Log::Dispatch::Perl;
        $RT::Logger->add(
            Log::Dispatch::Perl->new(
                name      => 'rttest',
                min_level => $screen_logger->min_level,
                action    => {
                    error    => 'warn',
                    critical => 'warn'
                }
            )
        );
        require Plack::Middleware::Test::StashWarnings;
        $app = Plack::Middleware::Test::StashWarnings->wrap($app);
    }

    return $app;
}

sub run {
    my $self = shift;

    my %args = @{$self->{options}};

    # Plack::Handler::FCGI has its own catch for this, but doesn't
    # notice that listen is an empty list, and we can also provide a
    # better error message.
    if ($self->{server} eq "FCGI" and not -S STDIN and not @{$args{listen} || []}) {
        print STDERR "STDIN is not a socket, and no --listen, --socket, or --port provided\n";
        exit 1;
    }

    eval { $self->SUPER::run(@_) };
    my $err = $@;
    exit 0 unless $err;

    if ( $err =~ /listen/ ) {
        print STDERR <<EOF;
WARNING: RT couldn't start up a web server on port $args{port}.
This is often the case if the port is already in use or you're running @{[$0]}
as someone other than your system's "root" user.  You may also specify a
temporary port with: $0 --port <port>
EOF

        if ($self->{explicit_port}) {
            print STDERR
                "Please check your system configuration or choose another port\n\n";
        }
        exit 1;
    } else {
        die
            "Something went wrong while trying to run RT's standalone web server:\n\t"
                . $err;
    }
}

1;
