NAME
    DateTime::Format::Alami - Parse human date/time expression (base class)

VERSION
    This document describes version 0.02 of DateTime::Format::Alami (from
    Perl distribution DateTime-Format-Alami), released on 2014-10-03.

SYNOPSIS
    Use English:

     use DateTime::Format::Alami::EN;
     my $parser = DateTime::Format::Alami::EN->new();
     my $dt;
     $dt = $parser->parse_datetime("2 hours 13 minutes from now");
     $dt = $parser->parse_datetime("yesterday");

    use Indonesian:

     use DateTime::Format::Alami::ID;
     my $parser = DateTime::Format::Alami::ID->new();
     my $dt;
     $dt = $parser->parse_datetime("5 jam lagi");
     $dt = $parser->parse_datetime("hari ini");

DESCRIPTION
    EARLY RELEASE: PROOF OF CONCEPT ONLY AND VERY VERY INCOMPLETE.

    This class parses human/natural date/time string and returns DateTime
    object. Currently it supports English and Indonesian. It is meant to be
    simple to add support for other human languages.

    It works by matching date string with a bunch of regex patterns
    (assembled from "p_*" methods, e.g. "p_today", "p_dur_ago",
    "p_dur_later", and so on). If a pattern is found, the corresponding
    "a_*" method is called to compute the DateTime object (e.g. if "p_today"
    pattern matches, "a_today" is called).

    To actually use this class, you must use one of its subclasses for each
    human language that you want to parse.

    There are already some other DateTime human language parsers on CPAN and
    elsewhere, see "SEE ALSO".

ADDING A NEW HUMAN LANGUAGE
    TBD

METHODS
  new => obj
    Constructor. You actually must instantiate subclass instead.

  parse_datetime($str) => obj
    Parse date/time expression in $str and return DateTime object. Return
    undef if expression cannot be parsed.

FAQ
  What does "alami" mean?
    It is an Indonesian word, meaning "natural".

SEE ALSO
  Similar modules on CPAN
    DateTime::Format::Natural. Translating to a language other than English
    looks very complex. This is indicated by the lack of support for
    non-English languages.

  Other modules on CPAN
    DateTime::Format::Human deals with formatting and not parsing.

  Similar non-Perl libraries
    Natt Java library, which the last time I tried sometimes gives weird
    answer, e.g. "32 Oct" becomes 1 Oct in the far future.
    http://natty.joestelmach.com/

    Duckling Clojure library, which can parse date/time as well as numbers
    with some other units like temperature.
    https://github.com/wit-ai/duckling

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/DateTime-Format-Alami>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-DateTime-Format-Alami>.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=DateTime-Format-Alami
    >

    When submitting a bug or request, please include a test-file or a patch
    to an existing test-file that illustrates the bug or desired feature.

AUTHOR
    perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2014 by perlancar@cpan.org.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

