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lib/Module/Generic/Finfo.pm  view on Meta::CPAN

    my $file = shift( @_ );
    my $p = scalar( @_ ) ? { @_ } : {};
    return( $self->new( $file, $p ) );
}

sub uid
{
    my $self = shift( @_ );
    my $data = $self->{_data};
    return( want( 'OBJECT' ) ? Module::Generic::Null->new : '' ) if( !scalar( @$data ) );
    return( $self->new_number( $data->[ FINFO_UID ] ) );
}

sub user
{
    my $self = shift( @_ );
    my $data = $self->{_data};
    return( want( 'OBJECT' ) ? Module::Generic::Null->new : '' ) if( !scalar( @$data ) );
    # perlport: "getpwuid: (Win32) Not implemented. (RISC OS) Not useful.
    return( $self->uid ) if( $^O =~ /^(win32|riscok)/i );
    return( $self->new_scalar( scalar( getpwuid( $data->[ FINFO_UID ] ) ) ) );
}

sub FREEZE
{
    my $self = CORE::shift( @_ );
    my $serialiser = CORE::shift( @_ ) // '';
    my $class = CORE::ref( $self );
    my %hash  = %$self;
    # Return an array reference rather than a list so this works with Sereal and CBOR
    # On or before Sereal version 4.023, Sereal did not support multiple values returned
    CORE::return( [$class, \%hash] ) if( $serialiser eq 'Sereal' && Sereal::Encoder->VERSION <= version->parse( '4.023' ) );
    # But Storable want a list with the first element being the serialised element
    CORE::return( $class, \%hash );
}

sub STORABLE_freeze { CORE::return( CORE::shift->FREEZE( @_ ) ); }

sub STORABLE_thaw { CORE::return( CORE::shift->THAW( @_ ) ); }

# NOTE: CBOR will call the THAW method with the stored classname as first argument, the constant string CBOR as second argument, and all values returned by FREEZE as remaining arguments.
# NOTE: Storable calls it with a blessed object it created followed with $cloning and any other arguments initially provided by STORABLE_freeze
sub THAW
{
    my( $self, undef, @args ) = @_;
    my $ref = ( CORE::scalar( @args ) == 1 && CORE::ref( $args[0] ) eq 'ARRAY' ) ? CORE::shift( @args ) : \@args;
    my $class = ( CORE::defined( $ref ) && CORE::ref( $ref ) eq 'ARRAY' && CORE::scalar( @$ref ) > 1 ) ? CORE::shift( @$ref ) : ( CORE::ref( $self ) || $self );
    my $hash = CORE::ref( $ref ) eq 'ARRAY' ? CORE::shift( @$ref ) : {};
    my $new;
    # Storable pattern requires to modify the object it created rather than returning a new one
    if( CORE::ref( $self ) )
    {
        foreach( CORE::keys( %$hash ) )
        {
            $self->{ $_ } = CORE::delete( $hash->{ $_ } );
        }
        $new = $self;
    }
    else
    {
        $new = CORE::bless( $hash => $class );
    }
    CORE::return( $new );
}

sub TO_JSON { CORE::return( CORE::shift->filepath ); }

sub _datetime
{
    my $self = shift( @_ );
    my $t = shift( @_ );
    return( $self->error( "No epoch time was provided." ) ) if( !length( $t ) );
    return( $self->error( "Invalid epoch time provided \"$t\"." ) ) if( $t !~ /^\d+$/ );
    my $class = ref( $self ) || $self;
    $self->_load_class( 'DateTime' ) || return( $self->pass_error );
    $self->_load_class( 'DateTime::Format::Strptime' ) || return( $self->pass_error );
    $self->_load_class( 'Module::Generic::DateTime' ) || return( $self->pass_error );
    # my $err_key = $class;
    # Previous approach
    # my $repo = Module::Generic::Global->new( 'local_tz' => $class, key => $err_key );
    # New system-wide shared approach
    my $repo = Module::Generic::Global->new( 'local_tz' => 'system' );
    my $has_local_tz = $repo->get;
    my $dt;
    if( !defined( $has_local_tz ) )
    {
        $repo->lock;
        $has_local_tz = $repo->get; # Double-check
        if( !defined( $has_local_tz ) )
        {
            # try-catch
            local $@;
            eval
            {
                $dt = DateTime->from_epoch( epoch => $t, time_zone => 'local' );
                $has_local_tz = 1;
            };
            if( $@ )
            {
                $has_local_tz = 0;
                warn( "Your system is missing key timezone components. ${class}::_datetime is reverting to UTC instead of local time zone.\n" );
                $dt = DateTime->from_epoch( epoch => $t, time_zone => 'UTC' );
            }
            $repo->set( $has_local_tz );
            # unlocks automatically at end of scope.
        }
    }
    else
    {
        # try-catch
        local $@;
        eval
        {
            $dt = DateTime->from_epoch( epoch => $t, time_zone => ( $has_local_tz ? 'local' : 'UTC' ) );
        };
        if( $@ )
        {
            warn( "Error trying to set a DateTime object using ", ( $has_local_tz ? 'local' : 'UTC' ), " time zone\n" );
            $dt = DateTime->from_epoch( epoch => $t, time_zone => 'UTC' );
        }
    }