#! @im_path_perl@
################################################################
###
###				 imhsync
###
### Author:  Internet Message Group <img@mew.org>
### Created: Jul 02, 1998
### Revised: Feb 28, 2000
###

BEGIN {
    @im_my_siteperl@
    @im_src_siteperl@
};

my $VERSION = "imhsync version 20000228(IM140)";

$Prog = 'imhsync';

##
## Require packages
##

use Fcntl;
use IM::Config;
use IM::History;
use IM::Message;
use IM::Util;
use integer;
use strict;
use vars qw($Prog $EXPLANATION @OptConfig @Hdr %Folder
	    $opt_db $opt_folder $opt_verbose $opt_debug $opt_help);

##
## Environments
##

$EXPLANATION = "
imhsync :: Refile by another DB
$VERSION

Usage: imhsync [options]
";

@OptConfig = (
    'db;s;;'         => 'reference DB.',
    'folder;s;;'     => 'folder to be refiled.',
    'verbose;b;;'    => 'With verbose messages.',
    'debug;d;;'      => "With debug message.",
    'help;b;;'       => "Show this message.",
    );

##
## Profile and option processing
##

init_opt(\@OptConfig);
read_cfg();
read_opt(\@ARGV); # help?
help($EXPLANATION) && exit $EXIT_SUCCESS if $opt_help;

debug_option($opt_debug) if $opt_debug;

##
## Main
##

if (msgdbfile() eq '') {
    im_die("MsgDBFile is not defined.\n");
}
if ($opt_db eq '') {
    im_die("--db option is not specified.\n");
}
if (! -f $opt_db) {
    im_die("$opt_db is not found.\n");
}
if ($opt_folder eq '') {
    im_die("--folder is not specified.\n");
}

{
    my $p = expand_path($opt_folder);
    if (-d $p) {
	# folder
	if (my_history_open($opt_db) < 0) {
	    exit $EXIT_ERROR;
	}
	folder_db_refile($p, $opt_folder);
	my_history_close();
    } else {
	im_warn("no message found to refile.\n");
	exit $EXIT_ERROR;
    }
}

exit $EXIT_SUCCESS;

sub db_refile ($$) {
    my ($msg, $folder) = @_;
    my ($multi_folder);
    local (@Hdr) = ();
    if (im_open(\*MSG, "<$msg")) {
	&read_header(\*MSG, \@Hdr, 0);
	close (MSG);
	my $mid = &header_value(\@Hdr, 'Message-ID');
	my $dest = my_history_lookup($mid, 0);
	my ($f, $df);
	$multi_folder = 0;
	$df = '';
	foreach $f (split(',', $dest)) {
	    $f =~ s|/[^/]*$||;
	    if ($df eq '') {
		$df = $f;
	    } elsif ($df ne $f) {
		$multi_folder = 1;
	    }
	}
	if ($df ne '') {
	    if ($folder ne $df &&  $multi_folder == 0) {
#		system("immv --src=$folder $df $msg");
		$Folder{$df} .= " $msg";
	    } else {
		print "keep $folder/$msg\n";
	    }
	}
	return 0;
    }
    return -1;
}

sub folder_db_refile ($$) {
    my ($dir, $folder) = @_;
    $dir =~ s|/$||;
    im_info("Refiling folder $dir\n");
    chdir ($dir);
    unless (opendir(FOLDER, $dir)) {
	im_warn("can't read $dir\n");
	return -1;
    }
    my @lower = ();
    my $f;
    foreach $f (readdir(FOLDER)) {
	if ($f eq '.' || $f eq '..') {
	} elsif ($f =~ /^\d+$/ && -f $f) {
#	    print(" $f\n");
	    db_refile($f, $folder);
	}
    }
    foreach $f (keys %Folder) {
	my $m = join(' ', sort(split(' ', $Folder{$f})));
	im_info("$f:$Folder{$f}\n");
	system("immv --src=$folder $f $Folder{$f}");
    }
    closedir(FOLDER);
}

use vars qw($DBtype $nodbfile $DB_HASH %History);

sub my_history_open ($$) {
    my ($dbfile) = @_;
    $DBtype = msgdbtype();	# package global
    unless ($DBtype) {
	$DBtype = 'DB';
    }

    if ($dbfile eq '') {
	$nodbfile = 1;
	return -2;
    }

    if ($DBtype eq 'DB') {
	require DB_File && import DB_File;
	$DB_HASH->{'cachesize'} = 100000 ;
    } elsif ($DBtype eq 'NDBM') {
	require NDBM_File && import NDBM_File;
    } elsif ($DBtype eq 'SDBM') {
	require SDBM_File && import SDBM_File;
    } elsif ($DBtype eq '') {
	im_err("no DB type defined.\n");
	return -2;
    } else {
	im_err("DB type $DBtype is not supported.\n");
	return -2;
    }

    im_debug("history database: $dbfile\n") if (&debug('history'));

    my ($db, $fd);
    if ($DBtype eq 'DB') {
	$db = tie %History, 'DB_File', $dbfile, O_RDONLY(), 0444;
    } elsif ($DBtype eq 'NDBM') {
	$db = tie %History, 'NDBM_File', $dbfile, O_RDONLY(), 0444;
    } elsif ($DBtype eq 'SDBM') {
	if (&win95p || &os2p){
	    $db = tie %History, 'SDBM_File', $dbfile, O_RDONLY(), 0444;
	} else {
	    $db = tie %History, 'SDBM_File', $dbfile, O_RDONLY(), 0444;
	}
    }

    unless ($db) {
	im_err "history: can not access $dbfile ($!)\n";
	return -1;
    }
    if ($DBtype eq 'DB') {
	$fd = $db->fd;
	if ($fd < 0) {
	    im_err "history: can not access $dbfile (fd = $fd)\n";
	    return -1;
	}
    }
    return 0;
}


sub my_history_close () {
    if ($nodbfile) {
	im_err("no database specified.\n");
	return;
    }
    untie %History;
}


sub my_history_lookup ($$) {
    if ($nodbfile) {
	im_err("no database specified.\n");
	return ();
    }
    my ($msgid, $field) = @_;
    $msgid =~ s/^<(.*)>$/$1/;
    if (defined($History{$msgid})) {
	if ($field == LookUpAll) {
	    return split("\t", $History{$msgid});
	} else {
	    my @flds = split("\t", $History{$msgid});
	    return $flds[$field];
	}
    } else {
	if ($field == LookUpAll) {
	    return ();
	} else {
	    return '';
	}
    }
}
