sub output {    
    
    my ($self)    = @_;
    my $outputtype = $outputtype_of{ident $self};
    
    #croak $outputtype;
    
    my $send_handler = (
        html    => do { $self->generate_html() },
        js      => do { $self->generate_js() },
        jpg     => do { $self->generate_jpg() },
        zip     => do { $self->generate_zip() },    
    );
    
    my $send_header = (
        html    => 'text/html',
        js      => 'text/javascript',
        jpg     => 'image/jpeg',
        zip     => 'archive/zip',
    );
    
    my $output = $send_handler{$outputtype}; # OUTPUT IST LEER
    
    print "Content-Type: $send_header{$outputtype} \n\n";
    print $output;
}


sub generate_html {
    
    my ($self)   = @_;
    my $template = $template_of{ident $self};     
     
    require HTML::Template;
     
    # check if page exists:
    if(!-e qq{./res/template/$template.html}) {
        croak "template not found.";    
    }
        
    my $output = HTML::Template->new(
        filename            => qq{./res/template/$template.html},
        die_on_bad_params   => 0,
    )->output();
   
    return $output;
    
}