package IMPL::Web::QueryHandler::PageFormat;
use parent qw(IMPL::Web::QueryHandler IMPL::Object::Autofill);
use strict;

__PACKAGE__->PassThroughArgs;

use JSON;
use IMPL::Class::Property;
use IMPL::Web::TT::Document;
use Template::Plugin::URL;
use IMPL::Security::Context();
use File::Spec();
use HTML::TreeBuilder();
use URI();
use Error qw(:try);
use Encode();

$Template::Plugin::URL::JOINT = '&';

BEGIN {
	public property templatesCharset => prop_all;
	public property templatesBase => prop_all;
	public property includes => prop_all | prop_list;
	public property pathinfoPrefix => prop_all;
	public property cache => prop_all;
	public property preprocess => prop_all;
	public property formatOutput => prop_all;
	public property template => prop_all;
}

sub CTOR {
	my ($this) = @_;
	
	$this->templatesCharset('utf-8') unless $this->templatesCharset;
	$this->cache(File::Spec->rel2abs($this->cache)) if $this->cache;
	$this->templatesBase(File::Spec->rel2abs($this->templatesBase)) if $this->templatesBase;
}

sub Process {
	my ($this,$action,$nextHandler) = @_;
	
	my $doc = new IMPL::Web::TT::Document(cache => $this->cache, preprocess => $this->preprocess);
	
	try {

		$this->templatesBase($ENV{DOCUMENT_ROOT}) unless $this->templatesBase;
		
		my ($requestUri) = split( /\?/, $ENV{REQUEST_URI} );
		
		my $pathInfo;
		my @root = ('');
		my @base;
		
		if ( $requestUri eq $ENV{SCRIPT_NAME}.$ENV{PATH_INFO} ) {
			# CGI with path info, for example
			# /base/cgi-bin/myscript.cgi/path/info
			# PATH_INFO will be /path/info
			$pathInfo = $ENV{PATH_INFO};
		} else {
			# usual url, for exmaple
			# /base/script.cgi will have PATH_INFO /base/script.cgi
			# /base/ will have PATH_INFO /base/index.cgi (if index.cgi is a DirectoryIndex)
			$pathInfo = $ENV{PATH_INFO};
			
			if (my $rx = $this->pathinfoPrefix) {
				$requestUri =~ s/^($rx)//;
				$pathInfo =~ s/^($rx)//;
				push @root, grep $_, split /\//, $1 if $1;
			}
		}
		
		@base = grep $_, split /\//, ($pathInfo ? substr $requestUri,0, -length($pathInfo) : $requestUri);
		
		local $ENV{PATH_INFO} = $pathInfo;
		
		my @path = grep $_, split /\//, ($ENV{PATH_INFO} || '') or die new IMPL::Exception("PATH_INFO is empty and no defaultTarget specified" );
		
		my @pathContainer = @path;
		pop @pathContainer;
		
		$doc->LoadFile (
			($this->template || File::Spec->catfile($this->templatesBase,@path)),
			$this->templatesCharset,
			[$this->templatesBase, $this->includes],
			{
				result => scalar($nextHandler->()),
				action => $action,
				app => $action->application,
		
				absoluteUrl => sub { new URI(join ('/', @root, $_[0]) ) },
				baseUrl => sub { new URI (join ('/', @root, @base, $_[0]) ) },
				relativeUrl => sub { new URI(join ('/', @root, @base, @pathContainer,$_[0]) ) },
		
				user => IMPL::Security::Context->current->principal,
				session => IMPL::Security::Context->current,
		
				to_json => \&to_json,
				escape_string => sub { $_[0] =~ s/"/"/g; $_[0] },
			}
		);
		
		$action->response->contentType('text/html');
		my $hOut = $action->response->streamBody;
		if ($this->formatOutput == 1) {
			my $tree = new HTML::TreeBuilder();
			try {
				$tree->parse_content($doc->Render());
				print $hOut $tree->as_HTML('<>&',"    ",{});
			} finally {
				$tree->delete;
			};
		} elsif ($this->formatOutput() == 2 ) {
			(my $data = $doc->Render()) =~ s/\s+/ /g;
			print $hOut $data;
		} else {
			print $hOut $doc->Render();
		}
	} finally {
		$doc->Dispose;
	};
}

sub URI::_query::new_params {
	my ($this,$params) = @_;
	
	my $clone = $this->clone;
	if (ref $params eq 'HASH' ) {
		my %newParams = ($clone->query_form , %$params);
		$clone->query_form(map { $_, ( Encode::is_utf8( $newParams{$_} ) ? Encode::encode('utf-8', $newParams{$_}) : $newParams{$_} ) } sort keys %newParams );
	}
	return $clone;
}

1;

__END__

=pod

=head1 NAME

C<IMPL::Web::QueryHandler::PageFormat> - Выдача результатов в виде HTML страницы, построенной из шаблона.

=head1 SYNOPSIS

В файле конфигурации приложения

=begin code xml

<handlersQuery type="IMPL::Object::List">
	<item type="IMPL::Web::QueryHandler::PageFormat">
		<charsetTemplates>utf-8</charsetTemplates>
	</item>
</handlersQuery>

=end code xml

Программно

=begin code

my $app = new IMPL::Web::Application();
$app->handlersQuery->Add(
	new IMPL::Web::QueryHandler::PageFormat( charsetTemplates=> 'utf-8' );
);

=end

=head1 DESCRIPTION

Обработчик запроса для веб приложения. Загружает шаблон, путь к котрому берется
из C<ENV{PATH_INFO}> относительно пути из свойства C<templatesBase>.

Наследуется от C<IMPL::Web::QueryHandler> для реализации функционала
обработчика запроса и переопределяет метод C<Process>.

C<Serializable>

=head1 MEMBERS

=over

=item C<CTOR(%props)>

Создает новый экземпляр и заполняет свойства.

=item C<[get,set] templatesCharset>

Кодировка шаблонов. По умолчанию utf-8.

=item C<[get,set] templatesBase>

Каталог относительно которого ищется шаблон.

=item C<[override] Process($action,$nextHandler)>

Метод, переопределяющий C<IMPL::Web::QueryHandler->Process> и которому передается управление
для выполнения действий.

=back

=cut