#!/usr/bin/perl -w

# This is a little utility designed to keep track of translations
# in the Debian web site CVS repository.

# For information about translation revisions please see
# http://www.debian.org/devel/website/uptodate

# This is GPL'ed code.
# Copyright 1998 Paolo Molaro <lupus@debian.org>.
# Copyright 1999-2003 Peter Karlsson <peterk@debian.org>.
# Copyright 2000,2001 Martin Quinson <mquinson@ens-lyon.fr>.

# Invocation:
#   check_trans.pl [-vqdlM] [-C dir] [-p pattern] [-s subtree]
#                  [-m email -n N] [-c charset] [-g] [-t outputtype]
#                  [language]

# It needs to be run from the top level webwml directory.
# If you don't specify a language on the command line, the language name
# will be loaded from a file called language.conf, if such a file exists.

# For example:
#   $ check_trans.pl -v italian
# You may also check only some subtrees as in:
#   $ check_trans.pl -s devel italian

# Options:
#	-Q		enable really quiet mode
#	-q		just don't whine about missing files
# 	-v		enable verbose mode
#	-V		enable very verbose mode
#	-C <dir>	go to <dir> directory before running this script
#	-d		output CVS diffs
#	-l		output CVS log messages
#	-T		output translated diffs
#	-p <pattern>	include only files matching <pattern>,
#			default is *.src|*.wml
#	-s <subtree>	check only that subtree
#	-t <type>	choose output type  (default is `text')
#	-M		display differences for all 'Makefile's
#	-a		output age of translation (if older than 2 months)

# Options useful when sending mails:
#	-m <email>	sends mails to translation maintainers
#			PLEASE CAREFULLY READ THE BELOW TEXT ABOUT MAKING MAILS!
#			<email> is the default recipient
#			(it should be the list used for organisation,
#			e.g. debian-l10n-french@lists.debian.org)
#	-g		debuG
#	-c <charset>	charset used in mails
#	-n <1|2|3>	send mails of priority upper or equal to
#			1 (monthly), 2 (weekly) or 3 (daily)

# Making Mails
#  If you want to, this script send mails to the maintainer of the mails.
#  BEWARE, SOME PEOPLE DO NOT LIKE TO RECEIVE AUTOMATIC MAILS!

#  PREREQUISITES:
#   You will need one database:
#     - one in which to get info about translators and the frequency at
#       which they want to get mails. It must be named
#       webwml/$langto/international/$langto/translator.db.pl
#       Please refer to the French one for more info.

#  USAGE:
#   If you give the "-g" option, all mails are sent to the default addressee
#     (i.e. the one given as value to the -m option), without respect to their
#     normal addressee. It is useful if you want to run it for yourself,
#     and for debugging.
#   Without that option, it sends real mails to real addresses.
#   MAKE SURE THE ADDRESSEES REALLY WANT TO GET THESE MAILS

use strict;
use Getopt::Std;
use IO::Handle;
use Date::Parse;

#    These modules reside under webwml/Perl
use lib ($0 =~ m|(.*)/|, $1 or ".") ."/Perl";
use Local::Cvsinfo;
use Local::WmlDiffTrans;
use Webwml::TransCheck;
use Webwml::TransIgnore;

# TODO:
# get the revisions from $lang/intl/$lang so diffing works
# need to quote dirnames?
# use a file to bind a file to a translator?

# global db variables
my $translations_status;
my $translators;# the ref resulting of require
my %translators;# the real hash

# misc hardcoded things
my $maintainer = "mquinson\@ens-lyon.fr"; # the default e-mail at which to bitch :-)

# options (note: with perl 5.6, this could change to our())
use vars qw($opt_C $opt_M $opt_Q $opt_c $opt_d $opt_g $opt_l $opt_m $opt_n
            $opt_p $opt_q $opt_s $opt_t $opt_T $opt_v $opt_V $opt_a);
$opt_n = 5; # an invalid default
$opt_s = '';
$opt_C = '.';
$opt_t = 'text';

unless (getopts('vgdqQC:m:c:s:Tt:p:ln:MVa'))
{
	open SELF, "<$0" or die "Unable to display help: $!\n";
	HELP: while (<SELF>)
	{
		print, next if /^$/;
		last HELP if (/^use/);
		s/^# ?//;
		next if /^!/;
		print;
	}
	exit;
}

if ($opt_a)
{
    require Date::Manip;
    import Date::Manip;
}

die "you can't have both verbose and quiet, doh!\n" if (($opt_v) && ($opt_Q));
die "you can't have both very verbose and quiet, doh!\n" if (($opt_V) && ($opt_Q));

$opt_v = 1 if ($opt_V);

warn "Checking subtree $opt_s only\n" if (($opt_v) && ($opt_s));

# include only files matching $filename
my $filename = $opt_p || '(\.wml$)|(\.src$)';

# Go to desired directory
chdir($opt_C) || die "Cannot go to $opt_C\n";

my $cvs = Local::Cvsinfo->new();
$cvs->options(
	recursive => 1,
	matchfile => [ $filename ],
	skipdir   => [ "template" ],
);
#   This object is used to retrieve information when original is
#   not English
my $altcvs = $cvs->new();

#   Global .transignore
my $globtrans = Webwml::TransIgnore->new(".");

# language configuration
my $defaultlanguage = '';
if (exists $ENV{DWWW_LANG})
{
	$defaultlanguage = $ENV{DWWW_LANG};
}
elsif (open CONF, "<language.conf")
{
	while (<CONF>)
	{
		next if /^#/;
		$defaultlanguage = $_;
		chomp $defaultlanguage;
		last;
	}
	close CONF;
}

my $from = 'english';
my $to = shift || $defaultlanguage;
$to =~ s%/$%%; # Remove slash from the end

if ($to eq '')
{
	die "Language not defined in DWWW_LANG, language.conf or on command line\n";
}

my $langto = $to;
$langto =~ s,^([^/]*).*$,$1,;
if (-e "./$langto/international/$langto/translator.db.pl") {
    push(@INC,"./$langto/international/$langto");
    print "READ TRANSLATOR DB: $langto/international/$langto/translator.db.pl\n"
       if $opt_v;
    require 'translator.db.pl';
    %translators=%{init_translators()};
    if (defined($translators{default})) {
        my @field_list = keys %{$translators{default}};
        foreach my $user (keys %translators) {
            next unless $user =~ m/ /;
            foreach my $f (@field_list) {
                $translators{$user}{$f} = $translators{default}{$f}
                    unless defined($translators{$user}{$f});
            }
        }
    }
} else {
    die "I need my DBs to send mails !\n Please read the comments in the script and try again\n" if $opt_m;
}

if ($opt_m) {
    unless ($opt_n =~ m,[123],) {
	die "Invalid priority. Please set -n value to 1, 2 or 3.\n".
	    "(assuming you know what you're doing)\n";
    }
}

$from = "$from/$opt_s";
$to = "$to/$opt_s";

init_mails();

print "\$translations = {\n" if $opt_t eq 'perl';

# Check the files in the English directory

my $V = $opt_V ? 1 : 0;
$cvs->readinfo($from, verbose => $V );
foreach my $path (@{$cvs->dirs()}) {
	my $tpath = $path;
	$tpath =~ s/^$from/$to/o;
	my $transignore = Webwml::TransIgnore->new($tpath);
	next unless $transignore->found();
	warn "Loading $tpath/.transignore\n" if $opt_v;
	foreach (@{$transignore->local()}) {
		s/^$to/$from/o;
		$cvs->removefile($_);
	}
}

my %checkedfile;

foreach (sort @{$cvs->files()}) {
	my ($path, $tpath);
	$path = $_;
	$tpath = $path;
	$tpath =~ s/^$from/$to/o;
    $checkedfile{$tpath} = 1; # Remember which files we found here
	check_file($tpath,
		$cvs->revision($path),
		str2time($cvs->date($path)),
		get_translators_from_db($tpath));
}

# Now check all the files in the translated directory as well, there may be
# some files that are not available in the English version.

$cvs->reset();
$cvs->readinfo($to, verbose => $V );
foreach my $tpath (@{$cvs->dirs()})
{
    my $transignore = Webwml::TransIgnore->new($tpath);
    next unless $transignore->found();
    warn "Loading $tpath/.transignore\n" if $opt_v;
    foreach (@{$transignore->local()})
    {
        s/^$to/$from/o;
        $cvs->removefile($_);
    }
}

foreach (sort @{$cvs->files()})
{
    my $tpath = $_;
    next if defined $checkedfile{$tpath}; # Don't look at a file twice
    warn "$tpath does not match anything in English\n" if $opt_v;
    check_file($tpath, undef, undef, get_translators_from_db($tpath));
}

print "}; 1;\n" if $opt_t eq 'perl';

send_mails();

if ($opt_M) {
	foreach my $makefile (split(/\n/, `find $from -name Makefile -print`)) {
		my $destination = $makefile;
		$destination =~ s/^$from/$to/o;
		if (-e $destination) {
            # First check if the destination makefile simply includes the english
            # version
            my $includes = 0;
            if (open MK, "<$destination")
            {
                my $firstline = <MK>;
                close MK;
                $includes = 1 if $firstline =~ m'^include.*subst webwml/.*,webwml/english,.*CURDIR.*Makefile';
            }
            else
            {
                warn "Cannot read $from: $!\n";
            }
            unless ($includes)
            {
                # Otherwise show any differences
                STDOUT->flush;
                system("diff -u $destination $makefile");
                STDOUT->flush;
            }
		}
	}
}

sub verify_send {
    return 1 unless ($opt_m);
    # returns true whether we have to send this part to this guy
    my $name=shift;
    my $part=shift;
    $name =~ s,<.*?>,,;
    $name =~ s,^ *(.*?) *$,$1,;
    print "$name is unknown\n" unless defined($translators{$name});
#    print "pri=$opt_n ; maint_pri=${translators{$name}{$part}}\n";
    return $opt_m # if we have to send any mail
	&& defined($translators{$name})  # if this guy is known
	&& defined($translators{$name}{$part}) # we know something about the wanted frequency
	&& ($opt_n <= $translators{$name}{$part}); # check if the frequency is ok
}

sub get_translators_from_db {
    my $id=shift;
    my $res='';

    $id=~ s,^$langto/,,;
    $id=~ s/\.wml$//;
    if (defined(%{$$translations_status{$id}})
	&& defined ($$translations_status{$id}{'translation_maintainer'})) {
	foreach my $n (sort @{$$translations_status{$id}{'translation_maintainer'}}) {
	    $res .= " $n";
	}
    } else {
	$res = "";
    }
    return $res;
}

sub init_mails {
    return unless $opt_m;
    eval q{use MIME::Lite};
    foreach my $name (keys %translators) {
	return if defined $translators{$name}{"msg"};
	next if $name eq 'default' || $translators{$name}{email} eq '';
	$translators{$name}{"msg"} = MIME::Lite->new(
	   From    => "Script watching translation state <$maintainer>",
           To      => ($opt_g ? $opt_m : $translators{$name}{"email"}),
           Subject => $translators{$name}{mailsubject},
           Type    => 'multipart/mixed');
        my $str;
        {
                open (MAIL, "< $translators{$name}{mailbody}")
                        or die "$name: Unable to read \`$translators{$name}{mailbody}'";
                local $/ = undef;
	        $str= <MAIL>;
                close (MAIL);
        }
        1 while ($str =~ s/#(.*?)#/eval $1/ge);

	my $part = MIME::Lite->new(
           Type => 'TEXT',
           Data => $str);
	$part->attr('content-type.charset' => $opt_c) if $opt_c;
        $translators{$name}{"msg"}->attach($part);
	$translators{$name}{"send"}=0;
    }
}

sub send_mails {
    #Makes the mails and send them
    return unless $opt_m;
    foreach my $name (sort keys %translators) {
	next if $name eq 'default' || $translators{$name}{email} eq '';
	$translators{$name}{"msg"}->attach(
                     Type     => 'TEXT',
	             Filename => 'NeedToUpdate_summary',
		     Data     => $translators{$name}{"part_summary"})
	    if defined($translators{$name}{"part_summary"});
	$translators{$name}{"msg"}->attach(
		     Type     => 'TEXT',
	             Filename => 'Missing_summary',
		     Data     => $translators{$name}{"part_missing"})
	    if defined($translators{$name}{"part_missing"});
	foreach my $part (qw (file logs diff tdiff)) {
	    if (defined($translators{$name}{"part_$part"})) {
		foreach my $file (sort keys %{$translators{$name}{"part_$part"}}) {
		    $translators{$name}{"msg"}->attach(
			 Type     => 'TEXT',
	                 Filename => "$file.$part",
			 Data     => $translators{$name}{"part_$part"}{$file});
		}
	    }
	}
	if ($translators{$name}{"send"}) {
	    print "send mail to $name\n" unless $opt_Q;
	    if (($name =~ m,mquinson,) || ($opt_g && $opt_m eq $maintainer)) {
		print "Well, detourned to $maintainer\n" unless $opt_Q;
		$translators{$name}{"msg"}->send;
	    }
#	    $translators{$name}{"msg"}->print_header;
	    $translators{$name}{"msg"}->send;
	} else {
	    print "didn't send mail to $name: nothing to say to him\n" unless $opt_Q;
	}
    }
}

sub add_part {
    my $name = shift;
    my $part = shift;
    my $txt = shift;
    $name =~ s,<.*?>,,;
    $name =~ s,^ *(.*?) *$,$1,;
    if (verify_send($name,$part)) {
	$translators{$name}{"part_$part"}.=$txt;
	$translators{$name}{"send"}=1;
    }
}

sub add_sub_part {
    my $name = shift;
    my $part = shift;
    my $subpart=shift;
    my $txt = shift;
    $name =~ s,<.*?>,,;
    $name =~ s,^ *(.*?) *$,$1,;
#    print "add_sub_part($name)(part=$part)($subpart):$txt" if $opt_v;
    STDOUT->flush;
    if (verify_send($name,$part)) {
#	print "YES\n";
	$translators{$name}{"part_$part"}{$subpart}.= "$txt";
	$translators{$name}{"send"}=1;
    }
#    print "no\n";
}

sub get_diff_txt {
  my ($oldr, $revision, $oldname, $name) = @_;
  my $cmd;

  # Get old revision file
  $cmd = "cvs -z3 update -r $oldr -p $oldname 2>/dev/null";
#  print "!get_diff_txt: cvs -z3 update -r ".$oldr." -p ".$oldname."\n";
  my @old_rev_file_lines = qx($cmd);

  # Get translation file
  open (FILE,"$name") || die ("Can't open `$name' for read");
  my @translation_file_lines;
  while (<FILE>) {
      $translation_file_lines[scalar @translation_file_lines] = $_;
  }
  close FILE || die ("Can't close $name after reading");

  # Get diff lines
  $cmd = "cvs -z3 diff -u -r$oldr -r $revision $oldname 2>/dev/null";
#  print "get_diff_txt: $cmd: cvs -z3 diff -u -r$oldr -r $revision $oldname\n";
  my @diff_lines = qx($cmd);

  my $txt = Local::WmlDiffTrans::find_trans_parts(\@old_rev_file_lines,
						  \@translation_file_lines,
						  \@diff_lines);

  return $txt;
}

sub check_file {
	my ($name, $revision, $mtime, $translator) = @_;
	$revision ||= 'n/a';
	my ($oldr, $oldname, $original, $fromname);
	warn "Checking $name, English revision $revision\n" if $opt_v;
        my $docname = $name;
        $docname =~ s#^$langto/##;
        $docname =~ s#\.wml$##;
	unless (-r $name) {
		(my $iname = $name) =~ s/^$to//o;
		if (!$globtrans->is_global($iname)) {
		  unless (($opt_q) || ($opt_Q)) {
                     if ($opt_t eq 'perl') {
  	               print "'$docname' => {\n\t'type' => 'Web',\n";
  	               print "\t'revision' => '$revision',\n";
  	               print "\t'mtime' => '$mtime',\n" if $mtime;
  	               print "\t'status' => 1,\n";
  	               print "},\n";
                     } else {
  		       print "Missing $name version $revision\n";
                     }
		     add_part("untranslated","missing","Missing $name version $revision\n");
		  }
		} else {
		  warn "Ignored $name\n" if $opt_v;
		}
		return;
	}
	my $transcheck = Webwml::TransCheck->new($name);
	$oldr = $transcheck->revision() || 0;
	if (!$oldr && ($name =~ m#$langto/international/$langto#i)) {
		#   This document is original, check for
		#   english/international/$langto...
		$name =~ s{^$to}{$from};
		$transcheck = Webwml::TransCheck->new($name);
		$oldr       = $transcheck->revision() || 0;
	}
	$translator = $transcheck->maintainer() || "";
	$original   = $transcheck->original();
	warn "Found translation for $oldr\n" if $opt_v and $oldr;
	warn "Translated by $translator\n"   if $opt_v and $translator;
	warn "Original is $original\n"       if $opt_v and $original;
	if ($original) {
		my ($fromdir);
		$fromname = $name;
		$fromname =~ s{^[^/]+}{$original};
		$fromdir  = $fromname;
		$fromdir  =~ s{/+[^/]+$}{};
		$altcvs->reset();
		$altcvs->readinfo($fromdir, matchfile => [$fromname]);
		$revision = $altcvs->revision($fromname);
		warn "Original is $original, revision $revision\n" if $opt_v;
	}

	$translator =~ s/^\s+//;
	$translator =~ s/\s+$//;

	my $str;
	my $status = 8; # Unknown
   	(my $numrev)  = $revision =~ m/^1\.(\d+)$/; $numrev ||= "0";
   	(my $numoldr) = $oldr =~ m/^1\.(\d+)$/; $numoldr ||= "0";

    if ($revision ne 'n/a')
    {
        # The original version of this file exists (English or otherwise)
        # - compare the translated version number to the original
    	if (!$oldr) {
            if ($name =~ /^english/)
            {
                # This is the original file
                $status = 4; # Up-to-date
                $oldr = $revision;
            }
            else
            {
        	    $oldr = '1.0';
        	    $str = "Unknown status of $name (revision should be $revision)";
            }
    	} elsif ($oldr eq $revision) {
    	    $status = 4; # Up-to-date
    	} elsif ($numoldr > $numrev) {
    	    $str = "Broken revision number $oldr for $name, it should be $revision";
    	} else {
    	    $str = "NeedToUpdate $name from version $oldr to version $revision";
    	    $status = 3; # Needs update
    	}
    }
    else
    {
        # There is no English file matching this one.
        if ($oldr eq '0')
        {
            # There is no translation-check header, so it must be the
            # original version, and is thus always up-to-date.
            $status = 4; # Up-to-date
        }
        else
        {
            # There is a translation-check header referencing an English
            # version, which means that the English file has been removed.
            $status = 7; # Obsolete
            $str = "Obsolete $name";
        }
    }

	$str .= " (maintainer: $translator)" if $translator;
	if ($opt_t eq 'perl') {
  	  print "'$docname' => {\n\t'type' => 'Web',\n";
  	  print "\t'revision' => '$revision',\n";
  	  print "\t'mtime' => '$mtime',\n" if $mtime;
  	  print "\t'base_revision' => '$oldr',\n";
  	  print "\t'translation_maintainer' => ['$translator'],\n" if $translator;
  	  print "\t'status' => $status,\n";
  	  print "},\n";
	} elsif ($str && $oldr ne $revision) {
	  $str .= "\n";
	  print $str unless ($opt_Q);
	}

    # Return if we're up-to-date or the original is missing
	return if (defined($oldr) && ($oldr eq $revision || $revision eq 'n/a'));

    if ($original)
    {
        # Source is non-English, use name we set up above
        $oldname = $fromname;
    }
    else
    {
        # Source is English
        $oldname = $name;
        $oldname =~ s/^$to/$from/;
    }

	my @logrev = split(/\./, $oldr);
	$logrev[$#logrev] ++;
	my $logoldr = join('.', @logrev);
	my $maxdelta = $transcheck->maxdelta() || $translators{maxdelta}{maxdelta} || 5;

	if ($opt_m) {
            my @list_tr;
	    if ($translator eq "") {
                if ($numrev - $numoldr >= $maxdelta) {
	            @list_tr = ("maxdelta");
                } else {
	            @list_tr = ("unmaintained");
                }
            } elsif ($numrev - $numoldr >= $maxdelta) {
	        @list_tr = ($translator, "maxdelta");
            } else {
	        @list_tr = ($translator);
            }
            foreach my $tname (@list_tr) {
                add_part($tname,"summary",$str);
                add_sub_part($tname,"diff",$name,
                        join("",qx(cvs -z3 diff -u -r'$oldr' -r $revision $oldname)));
                add_sub_part($tname,"tdiff",$name,
                        get_diff_txt("$oldr","$revision","$oldname","$name"));

                add_sub_part($tname,"logs",$name,
                        join("",qx(cvs -z3 log -r$logoldr:$revision $oldname)));
                add_sub_part($tname,"file",$name,
                        join("",qx(cat $name)));
            }
	}

	if ($opt_d) {
		STDOUT->flush;
		my $cvsline = "cvs -z3 log -r'$logoldr:$revision' '$oldname'";
		warn "Running $cvsline\n" if (($opt_v) && ($opt_l));
		system($cvsline) if $opt_l;
		STDOUT->flush if $opt_l;
		$cvsline = "cvs -z3 diff -u -r '$oldr' -r '$revision' '$oldname'";
		warn "Running $cvsline\n" if $opt_v;
		system($cvsline);
		STDOUT->flush;
	}

    if (3 == $status && $opt_a) {
        # Check the age of this translation
        STDOUT->flush;
        my $cvsline = "cvs -z3 log -r'$logoldr' '$oldname'";
        if (open CVSLOG, '-|', $cvsline)
        {
            CVSDATA: while (<CVSLOG>)
            {
                last CVSDATA if /^date:/;
            }
            close CVSLOG;
            if (/^date: ([\d]{4}.[\d]{2}.[\d]{2})/)
            {
                # Got the date of the last translation
                my $agestring = &DateCalc($1, 'today', 1, 1);
                die "CVS date is in the future" if $agestring =~ /^\-/;
                my ($years, $months, $weeks, $undef) = split /:/, substr($agestring, 1), 4;
                my ($yearstring, $monthstring, $weekstring) = ('', '', '');
                if ($years)
                {
                    $yearstring = "$years year";
                    $yearstring .= 's' unless 1 == $years;
                }
                if ($months)
                {
                    $monthstring = "$months month";
                    $monthstring .= 's' unless 1 == $months;
                }
                if ($weeks)
                {
                    $weekstring = "$weeks week";
                    $weekstring .= 's' unless 1 == $weeks;
                }

                if ($weeks > 2 || $months || $years)
                {
                    $monthstring .= ', '
                        if $monthstring ne '' && $weekstring ne '';
                    $yearstring .= ', '
                        if $yearstring ne '' && ($monthstring ne '' || $weekstring ne '');
                    print "$name is outdated by $yearstring$monthstring$weekstring\n";
                }
            }
        }
        STDOUT->flush;
    }

	if ($opt_T) {
	    print get_diff_txt("$oldr", "$revision", "$oldname", "$name")."\n";
	}
}