SYNOPSIS

use Template;
use Template::Multilingual::Parser;

my $parser = Template::Multilingual::Parser->new();
my $template = Template->new(PARSER => $parser);
$template->process('example.ttml', { language => 'en'});

DESCRIPTION

This subclass of Template Toolkit's "Template::Parser" parses multilingual templates: templates that contain text in several languages.

    <t>
      <en>Hello!</en>
      <fr>Bonjour !</fr>
    </t>

Use this module directly if you have subclassed "Template", otherwise you may find it easier to use "Template::Multilingual".

Language codes can be any string that matches "\w+", but we suggest sticking to ISO-639 which provides 2-letter codes for common languages and 3-letter codes for many others.

METHODS

new(\%params)

The new() constructor creates and returns a reference to a new parser object. A reference to a hash may be supplied as a parameter to provide configuration values.

Parser objects are typically provided as the "PARSER" option to the "Template" constructor.

Configuration values are all valid "Template::Parser" superclass options, and one specific to this class:

LANGUAGE_VAR

The LANGUAGE_VAR option can be used to set the name of the template variable which contains the current language. Defaults to language.

  my $parser = Template::Multilingual::Parser->new({
     LANGUAGE_VAR => 'global.language',
  });

You will need to set this variable with the current language value at request time, usually in your "Template" subclass' "process()" method.

parse($text)

parse() is called by the Template Toolkit. It parses multilingual sections from the input text and translates them to Template Toolkit directives. The result is then passed to the "Template::Parser" superclass.

sections

Returns a reference to an array of tokenized sections. Each section is a reference to hash with either a "nolang" key or a "lang" key.

A "nolang" key denotes text outside of any multilingual sections. The value is the text itself.

A "lang" key denotes text inside a multilingual section. The value is a reference to a hash, whose keys are language codes and values the corresponding text. For example, the following multilingual template:

  foo <t><fr>bonjour</fr><en>Hello</en></t> bar

will parse to the following sections:

  [ { nolang => 'foo ' },
    {   lang => { fr => 'bonjour', en => 'hello' } },
    { nolang => ' bar' },
  ]

LANGUAGE SUBTAG HANDLING

This module supports language subtags to express variants, e.g. ``en_US'' or ``en-US''. Here are the rules used for language matching:

• Exact match: the current language is found in the template

    language    template                              output
    fr          <fr>foo</fr><fr_CA>bar</fr_CA>        foo
    fr_CA       <fr>foo</fr><fr_CA>bar</fr_CA>        bar
  

• Fallback to the primary language

    language    template                              output
    fr_CA       <fr>foo</fr><fr_BE>bar</fr_BE>        foo
  

• Fallback to first (in alphabetical order) other variant of the primary language

    language    template                              output
    fr          <fr_FR>foo</fr_FR><fr_BE>bar</fr_BE>  bar
    fr_CA       <fr_FR>foo</fr_FR><fr_BE>bar</fr_BE>  bar
  

AUTHOR

Eric Cholet, "<[email protected]>"

    [% title = "<t><fr>Bonjour</fr><en>Hello</en></t>" %]

    [% title = BLOCK %]<t><fr>Bonjour</fr><en>Hello</en></t>[% END %]

COPYRIGHT & LICENSE

Copyright 2009 Eric Cholet, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.