# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

package PBot::StdinReader;
use parent 'PBot::Class';

use warnings; use strict;
use feature 'unicode_strings';

use POSIX qw(tcgetpgrp getpgrp);    # to check whether process is in background or foreground

sub initialize {
    my ($self, %conf) = @_;

    # create implicit bot-admin account for bot
    my $user = $self->{pbot}->{users}->find_user('.*', '*!stdin@pbot');
    if (not defined $user or not $self->{pbot}->{capabilities}->userhas($user, 'botowner')) {
        my $botnick = $self->{pbot}->{registry}->get_value('irc', 'botnick');
        $self->{pbot}->{logger}->log("Adding stdin botowner *!stdin\@pbot...\n");
        $self->{pbot}->{users}->add_user($botnick, '.*', '*!stdin@pbot', 'botowner', undef, 1);
        $self->{pbot}->{users}->login($botnick, "$botnick!stdin\@pbot", undef);
        $self->{pbot}->{users}->save;
    }

    # used to check whether process is in background or foreground, for stdin reading
    if (not $self->{pbot}->{registry}->get_value('general', 'daemon')) {
        open TTY, "</dev/tty" or die $!;
        $self->{tty_fd} = fileno(TTY);
        $self->{pbot}->{select_handler}->add_reader(\*STDIN, sub { $self->stdin_reader(@_) });
    } else {
        $self->{pbot}->{logger}->log("Starting in daemon mode.\n");
    }
}

sub stdin_reader {
    my ($self, $input) = @_;
    chomp $input;

    # make sure we're in the foreground first
    $self->{foreground} = (tcgetpgrp($self->{tty_fd}) == getpgrp()) ? 1 : 0;
    return if not $self->{foreground};

    $self->{pbot}->{logger}->log("---------------------------------------------\n");
    $self->{pbot}->{logger}->log("Got STDIN: $input\n");

    my ($from, $text);

    if ($input =~ m/^~([^ ]+)\s+(.*)/) {
        $from = $1;
        $text = $self->{pbot}->{registry}->get_value('irc', 'botnick') . " $2";
    } else {
        $from = 'stdin@pbot';
        $text = $self->{pbot}->{registry}->get_value('irc', 'botnick') . " $input";
    }
    return $self->{pbot}->{interpreter}->process_line($from, $self->{pbot}->{registry}->get_value('irc', 'botnick'), "stdin", "pbot", $text);
}

1;