NAME

WWW::Wikipedia::LangTitles - get interwiki links from Wikipedia.

SYNOPSIS

    use utf8;
    use WWW::Wikipedia::LangTitles 'get_wiki_titles';
    my $title = 'Three-phase electric power';
    my $links = get_wiki_titles ($title);
    print "$title is '$links->{de}' in German.\n";
    my $film = '東京物語';
    my $flinks = get_wiki_titles ($film, lang => 'ja');
    print "映画「$film」はイタリア語で'$flinks->{it}'と名付けた。\n";
    

produces output

    Three-phase electric power is 'Dreiphasenwechselstrom' in German.
    映画「東京物語」はイタリア語で'Viaggio a Tokyo'と名付けた。

(This example is included as synopsis.pl in the distribution.)

VERSION

This documents version 0.03 of WWW::Wikipedia::LangTitles corresponding to git commit 7abf04f07649708e751600544787dfa42c2fad9f released on Tue Dec 27 09:25:03 2016 +0900.

DESCRIPTION

This module retrieves the Wikipedia interwiki link titles from wikidata.org. It can be used, for example, to translate a term in English into other languages, or to get near equivalents.

FUNCTIONS

get_wiki_titles

   my $ref = get_wiki_titles ('Helium');

Returns a hash reference with all the articles in each language, indexed by the language. For example $ref->{th} will be equal to ฮีเลียม, the Thai title of the equivalent Wikipedia article.

The language of the original page can be specified like this:

   use utf8;
   my $from_th = get_wiki_titles ('ฮีเลียม', lang => 'th');

The URL is encoded using "uri_escape_utf8" in URI::Escape, so you must use character strings not byte strings (use "use utf8;" etc.)

An option "verbose" switches on verbose messages with any true value:

   my $ref = get_wiki_titles ($name, verbose => 1);

The contents of these messages is not specified, and is liable to change without notice in future releases.

As of this version, this deletes the non-Wikipedia sites like Wikiquote and Wikiversity from the list of returned values

make_wiki_url

    my $url = make_wiki_url ('helium');

Make a URL for the Wikidata page. You will then need to retrieve the page and parse the JSON yourself. Use a second argument to specify the language of the page:

    use utf8;
    use WWW::Wikipedia::LangTitles 'make_wiki_url';
    print make_wiki_url ('ฮีเลียม', 'th'), "\n";

produces output

    https://www.wikidata.org/w/api.php?action=wbgetentities&sites=thwiki&titles=%E0%B8%AE%E0%B8%B5%E0%B9%80%E0%B8%A5%E0%B8%B5%E0%B8%A2%E0%B8%A1&props=sitelinks/urls|datatype&format=json

(This example is included as thai-url.pl in the distribution.)

If no language is specified, the default is en for English.

This method was added in version 0.02 of the module.

SEE ALSO

Locale::Codes

You may be able to convert the language codes to and from the language names using this module. (I have not tested it yet.)

DEPENDENCIES

Carp

Carp is used to report errors

LWP::UserAgent

LWP::UserAgent is used to retrieve the data from Wikidata.

JSON::Parse

JSON::Parse is used to parse the JSON data from Wikidata.

URI::Escape

URI::Escape is used to make the URLs for Wikidata from the input titles.

EXPORTS

Nothing is exported by default. The export tag ':all' exports all the functions of the module.

    use WWW::Wikipedia::LangTitles ':all';

TESTING

The default tests of the module do not attempt to connect to the internet. To test using an internet connection, run xt/scrape.t like this:

    prove -I lib xt/scrape.t

from the top directory of the distribution.

HISTORY

This module was a collection of small scripts I had been using to scrape multilingual article names related to physics from Wikipedia. I made the scripts into a CPAN module because I thought it could be useful to other people. Specifically, I used my scripts to add some Japanese element names to Chemistry::Elements, and I thought this method might be useful for someone else.

Version 0.02 added the "make_wiki_url" for people who want to retrieve and parse the output themselves.

AUTHOR

Ben Bullock, <bkb@cpan.org>

COPYRIGHT & LICENCE

This package and associated files are copyright (C) 2016 Ben Bullock.

You can use, copy, modify and redistribute this package and associated files under the Perl Artistic Licence or the GNU General Public Licence.

cpanm WWW::Wikipedia::LangTitles

perl -MCPAN -e shell
install WWW::Wikipedia::LangTitles