package WebGUI::International;

=head1 LEGAL

 -------------------------------------------------------------------
  WebGUI is Copyright 2001-2005 Plain Black Corporation.
 -------------------------------------------------------------------
  Please read the legal notices (docs/legal.txt) and the license
  (docs/license.txt) that came with this distribution before using
  this software.
 -------------------------------------------------------------------
  http://www.plainblack.com                     info@plainblack.com
 -------------------------------------------------------------------

=cut


use strict qw(vars subs);
use WebGUI::Session;


=head1 NAME

Package WebGUI::International

=head1 DESCRIPTION

This package provides an interface to the internationalization system.

=head1 SYNOPSIS

 use WebGUI::International;
 $string = WebGUI::International::get($internationalId,$namespace);
 $hashRef = WebGUI::International::getLanguage($lang);
 $hashRef = WebGUI::International::getLanguages();
 $url = WebGUI::International::makeUrlCompliant($url);

This package can also be used in object-oriented (OO) style.

 use WebGUI::International;
 my $i = WebGUI::International->new($namespace);
 $string = $i->get($internationalId);
 $url = $i->makeUrlCompliant($url);

=head1 METHODS

These functions/methods are available from this package:

=cut


#-------------------------------------------------------------------

=head2 get ( internationalId [ , namespace, languageId ] )

Returns the internationalized message string for the user's language.  If there is no internationalized message, this method will return the English string.

=head3 internationalId

An integer that relates to a message in the international table in the WebGUI database.

=head3 namespace

A string that relates to the namespace field in the international table in the WebGUI database. Defaults to 'WebGUI'.

=head3 languageId

An integer that specifies the language that the user should see.  Defaults to the user's defined language. If the user hasn't specified a default language it defaults to '1' (English).

=cut

sub get {
        my ($id, $language, $namespace);
	if (ref($_[0]) eq "WebGUI::International") {
		$id = $_[1];
		$namespace = $_[2] || $_[0]->{_namespace} || "WebGUI";
		$language = $_[3] || $_[0]->{_language} || $session{user}{language} || "English";
	} else {
		$id = $_[0];
		$namespace = $_[1] || "WebGUI";
		$language = $_[2] || $session{user}{language} || "English";
	}
	my $cmd = "WebGUI::i18n::".$language."::".$namespace;
	my $load = "use ".$cmd;
	eval($load);
	WebGUI::ErrorHandler::warn($cmd." failed to compile because ".$@) if ($@);
	$cmd = "\$".$cmd."::I18N->{'".$id."'}{message}";
	my $output = eval($cmd);	
	WebGUI::ErrorHandler::warn("Couldn't get value from ".$cmd." because ".$@) if ($@);
	$output = get($id,$namespace,"English") if ($output eq "" && $language ne "English");
	return $output;
}


#-------------------------------------------------------------------

=head2 getLanguage ( [ languageId , propertyName] )

Returns a hash reference to a particular language's properties.

=head3 languageId

Defaults to "English". The language to retrieve the properties for.

=head3 propertyName

If this is specified, only the value of the property will be returned, instead of the hash reference to all properties. The valid values are "toolbar" and "label".

=cut

sub getLanguage {
	my $language = shift || "English";
	my $property = shift;
	my $cmd = "WebGUI::i18n::".$language;
	my $load = "use ".$cmd;
	eval($load);
	unless ($@) {
		$cmd = "\$".$cmd."::LANGUAGE";
		my $hashRef = eval($cmd);	
		WebGUI::ErrorHandler::warn("Failed to retrieve language properties because ".$@) if ($@);
		if ($property) {
			return $hashRef->{$property};
		} else {
			return $hashRef;
		}
	} else {
		WebGUI::ErrorHandler::warn("Language failed to compile: $language. ".$@);
	}
}


#-------------------------------------------------------------------

=head2 getLanguages ( )

Returns a hash reference to the languages (languageId/lanugage) installed on this WebGUI system.  

=cut

sub getLanguages {
        my ($hashRef);
	my $dir = $session{config}{webguiRoot}.$session{os}{slash}."lib".$session{os}{slash}."WebGUI".$session{os}{slash}."i18n";
	opendir (DIR,$dir) or WebGUI::ErrorHandler::fatalError("Can't open I18N directory! ".$dir);
	my @files = readdir(DIR);
	closedir(DIR);
	foreach my $file (@files) {
		if ($file =~ /(.*?)\.pm$/) {
			my $language = $1;
			$hashRef->{$language} = getLanguage($language,"label");
		}
	}
        return $hashRef;
}


#-------------------------------------------------------------------

=head2 makeUrlCompliant ( url [ , language ] )

Manipulates a URL to make sure it will work on the internet. It removes things like non-latin characters, etc.

=head3 url

The URL to manipulate.

=head3 languageId

Specify a default language. Defaults to user preference.

=cut

sub makeUrlCompliant {
        my ($language, $url);
	if (ref($_[0]) eq "WebGUI::International") {
		$url = $_[1];
		$language = $_[2] || $_[0]->{_language} || $session{user}{language} || "English";
	} else {
		$url = $_[0];
		$language = $_[1] || $session{user}{language} || "English";
	}
	my $cmd = "WebGUI::i18n::".$language;
	my $load = "use ".$cmd;
	eval($load);
	WebGUI::ErrorHandler::warn($cmd." failed to compile because ".$@) if ($@);
	$cmd = $cmd."::makeUrlCompliant";
	my $output = eval{&$cmd($url)};	
	WebGUI::ErrorHandler::warn("Couldn't execute ".$cmd." because ".$@) if ($@);
	return $output;
}


#-------------------------------------------------------------------

=head2 new ( [ namespace, languageId ] ) 

The constructor for the International function if using it in OO mode.

=head3 namespace

Specify a default namespace. Defaults to "WebGUI".

=head3 languageId

Specify a default language. Defaults to user preference.

=cut

sub new {
	my $class = shift;
	my $namespace = shift;
	my $language = shift;
	bless({_namespace=>$namespace,_language=>$language},$class);
}


1;