X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FMdirReader.pm;h=dbb74d6d9772f85afb5b9b0fc4b4b07e1b61ac60;hb=23af251dd607c4e75ab1e68063f2c885c48cc035;hp=c6a0e7a8d208de5d3103d7ad5ac2c6b4244d20af;hpb=550c69496caa3c61188c645b536ec3c4c3ade70a;p=public-inbox.git

diff --git a/lib/PublicInbox/MdirReader.pm b/lib/PublicInbox/MdirReader.pm
index c6a0e7a8..dbb74d6d 100644
--- a/lib/PublicInbox/MdirReader.pm
+++ b/lib/PublicInbox/MdirReader.pm
@@ -2,19 +2,106 @@
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # Maildirs for now, MH eventually
+# ref: https://cr.yp.to/proto/maildir.html
+#	https://wiki2.dovecot.org/MailboxFormat/Maildir
 package PublicInbox::MdirReader;
 use strict;
 use v5.10.1;
+use PublicInbox::InboxWritable qw(eml_from_path);
+use Digest::SHA qw(sha256_hex);
 
-sub maildir_each_file ($$;@) {
-	my ($dir, $cb, @arg) = @_;
+# returns Maildir flags from a basename ('' for no flags, undef for invalid)
+sub maildir_basename_flags {
+	my (@f) = split(/:/, $_[0], -1);
+	return if (scalar(@f) > 2 || substr($f[0], 0, 1) eq '.');
+	$f[1] // return ''; # "new"
+	$f[1] =~ /\A2,([A-Za-z]*)\z/ ? $1 : undef; # "cur"
+}
+
+# same as above, but for full path name
+sub maildir_path_flags {
+	my ($f) = @_;
+	my $i = rindex($f, '/');
+	$i >= 0 ? maildir_basename_flags(substr($f, $i + 1)) : undef;
+}
+
+sub shard_ok ($$$) {
+	my ($bn, $mod, $shard) = @_;
+	# can't get dirent.d_ino w/ pure Perl readdir, so we extract
+	# the OID if it looks like one instead of doing stat(2)
+	my $hex = $bn =~ m!\A([a-f0-9]{40,})! ? $1 : sha256_hex($bn);
+	my $recno = hex(substr($hex, 0, 8));
+	($recno % $mod) == $shard;
+}
+
+sub maildir_each_file {
+	my ($self, $dir, $cb, @arg) = @_;
 	$dir .= '/' unless substr($dir, -1) eq '/';
+	my ($mod, $shard) = @{$self->{shard_info} // []};
 	for my $d (qw(new/ cur/)) {
 		my $pfx = $dir.$d;
 		opendir my $dh, $pfx or next;
-		while (defined(my $fn = readdir($dh))) {
-			$cb->($pfx.$fn, @arg) if $fn =~ /:2,[A-Za-z]*\z/;
+		while (defined(my $bn = readdir($dh))) {
+			my $fl = maildir_basename_flags($bn) // next;
+			next if defined($mod) && !shard_ok($bn, $mod, $shard);
+			next if index($fl, 'T') >= 0; # no Trashed messages
+			$cb->($pfx.$bn, $fl, @arg);
+		}
+	}
+}
+
+my %c2kw = ('D' => 'draft', F => 'flagged', P => 'forwarded',
+	R => 'answered', S => 'seen');
+
+sub maildir_each_eml {
+	my ($self, $dir, $cb, @arg) = @_;
+	$dir .= '/' unless substr($dir, -1) eq '/';
+	my ($mod, $shard) = @{$self->{shard_info} // []};
+	my $pfx = $dir . 'new/';
+	if (opendir(my $dh, $pfx)) {
+		while (defined(my $bn = readdir($dh))) {
+			next if substr($bn, 0, 1) eq '.';
+			my @f = split(/:/, $bn, -1);
+
+			# mbsync and offlineimap both use "2," in "new/"
+			next if ($f[1] // '2,') ne '2,' || defined($f[2]);
+
+			next if defined($mod) && !shard_ok($bn, $mod, $shard);
+			my $f = $pfx.$bn;
+			my $eml = eml_from_path($f) or next;
+			$cb->($f, [], $eml, @arg);
+		}
+	}
+	$pfx = $dir . 'cur/';
+	opendir my $dh, $pfx or return;
+	while (defined(my $bn = readdir($dh))) {
+		my $fl = maildir_basename_flags($bn) // next;
+		next if index($fl, 'T') >= 0;
+		next if defined($mod) && !shard_ok($bn, $mod, $shard);
+		my $f = $pfx.$bn;
+		my $eml = eml_from_path($f) or next;
+		my @kw = sort(map { $c2kw{$_} // () } split(//, $fl));
+		$cb->($f, \@kw, $eml, @arg);
+	}
+}
+
+sub new { bless {}, __PACKAGE__ }
+
+sub flags2kw ($) {
+	if (wantarray) {
+		my @unknown;
+		my %kw;
+		for (split(//, $_[0])) {
+			my $k = $c2kw{$_};
+			if (defined($k)) {
+				$kw{$k} = 1;
+			} else {
+				push @unknown, $_;
+			}
 		}
+		(\%kw, \@unknown);
+	} else {
+		[ sort(map { $c2kw{$_} // () } split(//, $_[0])) ];
 	}
 }