Index: /trunk/tools/convert_language_to_2.1.pl
===================================================================
--- /trunk/tools/convert_language_to_2.1.pl	(revision 5315)
+++ /trunk/tools/convert_language_to_2.1.pl	(revision 5315)
@@ -0,0 +1,141 @@
+#!/usr/bin/perl
+
+# Here is the way I finally used this script:
+#
+# for language in ar_SA cz_CZ da_DK de_DE es_AR es_ES hr_HR hu_HU it_IT ja_JP nl_NL pl_PL pt_BR pt_PT ru_RU sr_RS vi_VN zh_CN
+# do
+#   export PWG_LANG=$language
+#   rm -rf language/$PWG_LANG
+#   cp -r ../branches/2.0/language/$PWG_LANG language/
+#   perl tools/convert_language_to_2.1.pl language/$PWG_LANG
+# done
+
+use strict;
+use warnings;
+
+my $language_dir = $ARGV[0];
+
+my @file_codes = qw/upgrade install admin common/;
+
+my %ignore_keys = (
+    'user_status_admin' => '',
+    'user_status_generic' => '',
+    'user_status_guest' => '',
+    'user_status_normal' => '',
+    'user_status_webmaster' => '',
+    'Level 0' => '',
+    'Level 1' => '',
+    'Level 2' => '',
+    'Level 4' => '',
+    'Level 8' => '',
+    'ACCESS_0' => '',
+    'ACCESS_1' => '',
+    'ACCESS_2' => '',
+    'ACCESS_3' => '',
+    'ACCESS_4' => '',
+    'ACCESS_5' => '',
+    'month' => '',
+    'day' => '',
+    'chronology_monthly_calendar' => '',
+    'chronology_monthly_list' => '',
+    'chronology_weekly_list' => '',
+);
+
+my %remove_keys = (
+    admin => {
+        'nbm_content_goto_2' => '',
+        'nbm_content_hello_2' => '',
+        'nbm_redirect_msg' => '',
+    },
+    upgrade => {
+        'Are you sure?' => '',
+    },
+);
+
+my %to_copy = ();
+
+# load the replacements
+my %replace_by = ();
+foreach my $file_code (@file_codes) {
+    open(my $ifh_rep, '<language/templates/'.$file_code.'.lang.php');
+    while (<$ifh_rep>) {
+        if (m/^\$lang\['(.*)'\] \s* = \s* (['"])(.*)\2;/x) {
+            if ($1 ne $3 and length($1) > 0) {
+                $replace_by{$1} = $3;
+            }
+        }
+    }
+}
+# use Data::Dumper; print Dumper(\%replace_by); exit();
+
+my $append_to_common = '';
+
+foreach my $file_code (@file_codes) {
+    my $filename = $language_dir.'/'.$file_code.'.lang.php';
+    print $filename;
+    if (not -f $filename) {
+        print ' is missing', "\n";
+        next;
+    }
+    print ' is under process', "\n";
+
+    if ($file_code eq 'admin') {
+        %to_copy = (
+            'Are you sure?' => '',
+            'Email address is missing. Please specify an email address.' => '',
+            'delete this comment' => '',
+            'validate this comment' => '',
+        );
+    }
+    else {
+        %to_copy = ();
+    }
+
+    my $file_content = '';
+    my $copy_content = '';
+
+    open(my $ifh, '<'.$language_dir.'/'.$file_code.'.lang.php');
+    while (my $line = <$ifh>) {
+        if ($line =~ m/^\$lang\['(.*)'\] \s* =/x) {
+            if (defined $remove_keys{$file_code}{$1}) {
+                next;
+            }
+            elsif (defined $ignore_keys{$1}) {
+                $file_content.= $line;
+            }
+            elsif (defined $to_copy{$1}) {
+                $append_to_common.= $line;
+            }
+            elsif (defined $replace_by{$1}) {
+                my $search = quotemeta($1);
+                my $replace = $replace_by{$1};
+
+                $line =~ s{$search}{$replace};
+
+                if (defined $to_copy{$replace}) {
+                    $append_to_common.= $line;
+                }
+                else {
+                    $file_content.= $line;
+                }
+            }
+            else {
+                $file_content.= $line;
+            }
+        }
+        elsif ($line =~ m/^?>/) {
+            if ('common' eq $file_code) {
+                $file_content.= $append_to_common;
+            }
+            $file_content.= $line;
+        }
+        else {
+            $file_content.= $line;
+        }
+    }
+    close($ifh);
+
+    open(my $ofh, '>'.$language_dir.'/'.$file_code.'.lang.php');
+    print {$ofh} $file_content;
+    close($ofh);
+}
