#! /usr/bin/perl -T
# vim: set filetype=perl ts=4 sw=4 sts=4 et:
# NEEDGROUP osh-selfAddPersonalAccess
# SUDOERS %osh-selfAddPersonalAccess    ALL=(allowkeeper) NOPASSWD:/usr/bin/env perl -T /opt/bastion/bin/helper/osh-accountModifyPersonalAccess --target self --action add *
# FILEMODE 0750
# FILEOWN 0 allowkeeper
#
# NEEDGROUP osh-accountAddPersonalAccess
# SUDOERS %osh-accountAddPersonalAccess ALL=(allowkeeper) NOPASSWD:/usr/bin/env perl -T /opt/bastion/bin/helper/osh-accountModifyPersonalAccess --target any --action add *
# FILEMODE 0750
# FILEOWN 0 allowkeeper
#
# NEEDGROUP osh-selfDelPersonalAccess
# SUDOERS %osh-selfDelPersonalAccess    ALL=(allowkeeper) NOPASSWD:/usr/bin/env perl -T /opt/bastion/bin/helper/osh-accountModifyPersonalAccess --target self --action del *
# FILEMODE 0750
# FILEOWN 0 allowkeeper
#
# NEEDGROUP osh-accountDelPersonalAccess
# SUDOERS %osh-accountDelPersonalAccess ALL=(allowkeeper) NOPASSWD:/usr/bin/env perl -T /opt/bastion/bin/helper/osh-accountModifyPersonalAccess --target any --action del *
# FILEMODE 0750
# FILEOWN 0 allowkeeper

#>HEADER
use common::sense;
use Getopt::Long;

use File::Basename;
use lib dirname(__FILE__) . '/../../lib/perl';
use OVH::Bastion;
local $| = 1;

#
# Globals
#
$ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/pkg/bin';
my ($self) = $ENV{'SUDO_USER'} =~ m{^([a-zA-Z0-9._-]+)$};
if (not defined $self) {
    if ($< == 0) {
        $self = 'root';
    }
    else {
        HEXIT('ERR_SUDO_NEEDED', msg => 'This command must be run under sudo');
    }
}

# Fetch command options
my $fnret;
my ($result, @optwarns);
my ($account, $ip, $user, $port, $action, $ttl, $forceKey, $target, $comment);
eval {
    local $SIG{__WARN__} = sub { push @optwarns, shift };
    $result = GetOptions(
        "account=s"   => sub { $account  //= $_[1] },
        "ip=s"        => sub { $ip       //= $_[1] },
        "user=s"      => sub { $user     //= $_[1] },
        "port=i"      => sub { $port     //= $_[1] },
        "action=s"    => sub { $action   //= $_[1] },
        "ttl=i"       => sub { $ttl      //= $_[1] },
        "force-key=s" => sub { $forceKey //= $_[1] },
        "target=s"    => sub { $target   //= $_[1] },
        "comment=s"   => sub { $comment  //= $_[1] },
    );
};
if ($@) { die $@ }

if (!$result) {
    local $" = ", ";
    HEXIT('ERR_BAD_OPTIONS', msg => "Error parsing options: @optwarns");
}

if (not $action or not $ip or not $account or not $target) {
    HEXIT('ERR_MISSING_PARAMETER', msg => "Missing argument 'action' or 'ip' or 'account' or 'target'");
}

#<HEADER

not defined $account and $account = $self;

#>RIGHTSCHECK
if ($target eq 'self' && $self ne $account) {
    HEXIT('ERR_SECURITY_VIOLATION', msg => "Attempted to modify another account while you're only allowed to do it on yourself");
}

#<RIGHTSCHECK

#>PARAMS:ACTION
if (not grep { $action eq $_ } qw{ add del }) {
    return R('ERR_INVALID_PARAMETER', msg => "expected 'add' or 'del' as an action");
}

#<PARAMS:ACTION

#>CODE
my $machine = $ip;
$port and $machine .= ":$port";
$user and $machine = $user . '@' . $machine;

# access_modify validates all its parameters, don't do it ourselves here for clarity
$fnret = OVH::Bastion::access_modify(
    way      => 'personal',
    account  => $account,
    action   => $action,
    user     => $user,
    ip       => $ip,
    port     => $port,
    ttl      => $ttl,
    forceKey => $forceKey,
    comment  => $comment,
);
if ($fnret->err eq 'OK') {
    my $ttlmsg = $ttl ? ' (expires in ' . OVH::Bastion::duration2human(seconds => $ttl)->value->{'human'} . ')' : '';
    HEXIT(
        'OK',
        value => {action => $action, account => $account, ip => $ip, user => $user, port => $port, ttl => $ttl, comment => $comment},
        msg   => $action eq 'add' ? "Access to $machine was added to account $account$ttlmsg" : "Access to $machine was removed from account $account$ttlmsg"
    );
}
elsif ($fnret->err eq 'OK_NO_CHANGE') {
    HEXIT('OK_NO_CHANGE',
        msg => $action eq 'add'
        ? "Access to $machine was already granted to account $account, nothing done"
        : "Access to $machine was not granted to account $account, nothing done");
}
HEXIT($fnret);