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package Devscripts::JSONCache;
use strict;
use JSON;
use Moo;
has file => (is => 'rw', required => 1);
has saved => (is => 'rw');
has _data => (is => 'rw');
sub save_sec {
my ($self, $obj) = @_;
my $tmp = umask;
umask 0177;
open(my $fh, '>', $self->file) or ($self->saved(1) and die $!);
print $fh JSON::to_json($obj);
close $fh;
umask $tmp;
}
sub data {
my ($self) = @_;
return $self->_data if $self->_data;
my $res;
if (-r $self->file) {
open(F, $self->file) or ($self->saved(1) and die $!);
$res = JSON::from_json(join('', <F>) || "{}");
close F;
} else {
$self->save_sec({});
$self->saved(0);
}
return $self->_data($res);
}
sub TIEHASH {
my $r = shift->new({
file => shift,
@_,
});
# build data
$r->data;
return $r;
}
sub FETCH {
return $_[0]->data->{ $_[1] };
}
sub STORE {
$_[0]->data->{ $_[1] } = $_[2];
}
sub DELETE {
delete $_[0]->data->{ $_[1] };
}
sub CLEAR {
$_[0]->save({});
}
sub EXISTS {
return exists $_[0]->data->{ $_[1] };
}
sub FIRSTKEY {
my ($k) = sort { $a cmp $b } keys %{ $_[0]->data };
return $k;
}
sub NEXTKEY {
my ($self, $last) = @_;
my $i = 0;
my @keys = map {
return $_ if ($i);
$i++ if ($_ eq $last);
return ()
}
sort { $a cmp $b } keys %{ $_[0]->data };
return @keys ? $keys[0] : ();
}
sub SCALAR {
return scalar %{ $_[0]->data };
}
sub save {
return if ($_[0]->saved);
eval { $_[0]->save_sec($_[0]->data); };
$_[0]->saved(1);
}
*DESTROY = *UNTIE = *save;
1;
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