NAME

Template::Multilingual::Parser - Multilingual template parser

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() 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, "<cholet@logilune.com>"

BUGS

Multilingual text sections cannot be used inside TT directives. The following is illegal and will trigger a TT syntax error:

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

Use this instead:

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

The TAG_STYLE, START_TAG and END_TAG directives are supported, but the TAGS directive is not.

Please report any bugs or feature requests to "bug-template-multilingual@rt.cpan.org", or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Template-Multilingual>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

COPYRIGHT & LICENSE

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