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# -*- perl -*-
#
# Copyright (C) 2012-2021 Alexis Bienvenüe <paamc@passoire.fr>
#
# This file is part of Auto-Multiple-Choice
#
# Auto-Multiple-Choice is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 2 of
# the License, or (at your option) any later version.
#
# Auto-Multiple-Choice is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Auto-Multiple-Choice. If not, see
# <http://www.gnu.org/licenses/>.
use warnings;
use 5.012;
package AMC::FileMonitor;
sub new {
my ( $class, %o ) = (@_);
my $self = { deltat => 1, };
for my $k ( keys %o ) {
$self->{$k} = $o{$k} if ( defined( $self->{$k} ) );
}
$self->{files} = [];
$self->{timeout_id} = 0;
bless( $self, $class );
return ($self);
}
sub add_file {
my ( $self, $path, $callout, %oo ) = @_;
push @{ $self->{files} },
{
path => $path,
callout => $callout,
time => $self->get_change_time($path),
%oo
}
if ($path);
$self->start();
}
sub key_i {
my ( $self, $key, $value ) = @_;
if ( @{ $self->{files} } ) {
for my $i ( 0 .. $#{ $self->{files} } ) {
return ($i) if ( $self->{files}->[$i]->{$key} eq $value );
}
return (undef);
} else {
return (undef);
}
}
sub remove_file {
my ( $self, $path ) = @_;
$self->remove_key( 'file', $path );
}
sub remove_key {
my ( $self, $key, $value ) = @_;
my $i = $self->key_i( $key, $value );
if ( defined($i) ) {
splice( @{ $self->{files} }, $i, 1 );
$self->stop
if ( !@{ $self->{files} } );
}
}
sub update_file {
my ( $self, $path ) = @_;
my $i = $self->file_i($path);
if ( defined($i) ) {
$self->{files}->[$i]->{time} = $self->get_change_time($path);
}
}
sub get_change_time {
my ( $self, $path ) = @_;
if ( -e $path ) {
my @st = stat($path);
return ( $st[10] );
} else {
return (0);
}
}
sub start {
my ($self) = @_;
if ( @{ $self->{files} } ) {
if ( !$self->{timeout_id} ) {
$self->{timeout_id} =
Glib::Timeout->add_seconds( $self->{deltat}, \&monitor, $self );
}
}
}
sub stop {
my ($self) = @_;
Glib::Source->remove( $self->{timeout_id} );
$self->{timeout_id} = 0;
}
sub monitor {
my ($self) = @_;
for my $f ( @{ $self->{files} } ) {
my $t = $self->get_change_time( $f->{path} );
if ( $t > $f->{time} ) {
$f->{time} = $t if ( !$f->{repeat} );
&{ $f->{callout} }() if ( $f->{callout} );
}
}
return (1);
}
1;
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