Dancer2_ex.pl

use Dancer2;
use DBI;
use File::Spec;
use File::Slurper qw/ read_text /;
use Template;
 
set 'database'        => File::Spec->catfile(File::Spec->tmpdir(), 'dancr.db');
set 'session'         => 'Simple';
set 'template'        => 'template_toolkit';
set 'logger'          => 'console';
set 'log'             => 'debug';
set 'show_stacktrace' => 1;
set 'startup_info'    => 1;
set 'username'        => 'admin';
set 'password'        => 'password';
set 'layout'          => 'main';
 
sub set_flash {
    my $message = shift;
 
    session flash => $message;
}
 
sub get_flash {
    my $msg = session('flash');
    session->delete('flash');
 
    return $msg;
}
 
sub connect_db {
    my $dbh = DBI->connect("dbi:SQLite:dbname=".setting('database'))
        or die $DBI::errstr;
 
    return $dbh;
}
 
sub init_db {
    my $db     = connect_db();
    my $schema = read_text('./schema.sql');
    $db->do($schema)
        or die $db->errstr;
}
 
hook before_template_render => sub {
    my $tokens = shift;
 
    $tokens->{'css_url'}    = request->base . 'css/style.css';
    $tokens->{'login_url'}  = uri_for('/login');
    $tokens->{'logout_url'} = uri_for('/logout');
};
 
get '/' => sub {
    my $db  = connect_db();
    my $sql = 'select id, title, text from entries order by id desc';
 
    my $sth = $db->prepare($sql)
        or die $db->errstr;
 
    $sth->execute
        or die $sth->errstr;
 
    template 'show_entries.tt', {
        msg           => get_flash(),
        add_entry_url => uri_for('/add'),
        entries       => $sth->fetchall_hashref('id'),
    };
};
 
post '/add' => sub {
    if ( not session('logged_in') ) {
        send_error("Not logged in", 401);
    }
 
    my $db  = connect_db();
    my $sql = 'insert into entries (title, text) values (?, ?)';
 
    my $sth = $db->prepare($sql)
        or die $db->errstr;
 
    $sth->execute(
        body_parameters->get('title'),
        body_parameters->get('text')
    ) or die $sth->errstr;
 
    set_flash('New entry posted!');
    redirect '/';
};
 
any ['get', 'post'] => '/login' => sub {
    my $err;
 
    if ( request->method() eq "POST" ) {
        # process form input
        if ( body_parameters->get('username') ne setting('username') ) {
            $err = "Invalid username";
        }
        elsif ( body_parameters->get('password') ne setting('password') ) {
            $err = "Invalid password";
        }
        else {
            session 'logged_in' => true;
            set_flash('You are logged in.');
            return redirect '/';
        }
    }
 
    # display login form
    template 'login.tt', {
        err => $err,
    };
 
};
 
get '/logout' => sub {
    app->destroy_session;
    set_flash('You are logged out.');
    redirect '/';
};
 
any qr{.*} => sub {

}

1;