#!/usr/bin/perl

# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.

=head1 NAME

xgettext-installer - extract translatable strings from installer YAML files

=head1 SYNOPSIS

xgettext-installer [OPTION] [INPUTFILE]...

=head1 OPTIONS

=over

=item B<-f, --files-from=FILE>

get list of input files from FILE

=item B<-o, --output=FILE>

write output to the specified file

=item B<-h, --help>

display this help and exit

=back

=cut

use Modern::Perl;

use Getopt::Long;
use Locale::PO;
use Pod::Usage;
use YAML::XS;

my $output = 'messages.pot';
my $files_from;
my $help;

GetOptions(
    'output=s' => \$output,
    'files-from=s' => \$files_from,
    'help' => \$help,
) or pod2usage(-verbose => 1, -exitval => 2);

if ($help) {
    pod2usage(-verbose => 1, -exitval => 0);
}

my @files = @ARGV;
if ($files_from) {
    open(my $fh, '<', $files_from) or die "Cannot open $files_from: $!";
    push @files, <$fh>;
    chomp @files;
    close $fh;
}

my $pot = {
    '' => Locale::PO->new(
        -msgid  => '',
        -msgstr =>
            "Project-Id-Version: Koha\n"
          . "PO-Revision-Date: YEAR-MO-DA HO:MI +ZONE\n"
          . "Last-Translator: FULL NAME <EMAIL\@ADDRESS>\n"
          . "Language-Team: Koha Translate List <koha-translate\@lists.koha-community.org>\n"
          . "MIME-Version: 1.0\n"
          . "Content-Type: text/plain; charset=UTF-8\n"
          . "Content-Transfer-Encoding: 8bit\n"
    ),
};

for my $file (@files) {
    my $yaml = YAML::XS::LoadFile($file);
    my @tables = @{ $yaml->{'tables'} };

    my $tablec = 0;
    for my $table (@tables) {
        $tablec++;

        my $table_name = ( keys %$table )[0];
        my @translatable = @{ $table->{$table_name}->{translatable} };
        my @rows = @{ $table->{$table_name}->{rows} };
        my @multiline = @{ $table->{$table_name}->{'multiline'} };

        my $rowc = 0;
        for my $row (@rows) {
            $rowc++;

            for my $field (@translatable) {
                if ( @multiline and grep { $_ eq $field } @multiline ) {
                    # multiline fields, only notices ATM
                    my $mulc;
                    foreach my $line ( @{ $row->{$field} } ) {
                        $mulc++;

                        # put placeholders
                        $line =~ s/(<<.*?>>|\[\%.*?\%\]|<.*?>)/\%s/g;

                        # discard non strings
                        next if ( $line =~ /^(\s|%s|-|[[:punct:]]|\(|\))*$/ or length($line) < 2 );
                        if ( not $pot->{$line} ) {
                            my $msg = Locale::PO->new(
                                -msgid  => $line,
                                -msgstr => '',
                                -reference => "$file:$table_name:$tablec:row:$rowc:mul:$mulc"
                            );
                            $pot->{$line} = $msg;
                        }
                    }
                } elsif (defined $row->{$field} && length($row->{$field}) > 1 && !$pot->{ $row->{$field} }) {
                    my $msg = Locale::PO->new(
                        -msgid     => $row->{$field},
                        -msgstr    => '',
                        -reference => "$file:$table_name:$tablec:row:$rowc"
                    );
                    $pot->{ $row->{$field} } = $msg;
                }
            }
        }
    }

    my $desccount = 0;
    for my $description ( @{ $yaml->{'description'} } ) {
        $desccount++;
        if ( length($description) > 1 and not $pot->{$description} ) {
            my $msg = Locale::PO->new(
                -msgid     => $description,
                -msgstr    => '',
                -reference => "$file:description:$desccount"
            );
            $pot->{$description} = $msg;
        }
    }
}

Locale::PO->save_file_fromhash($output, $pot, 'utf8');