# Copyright (C) 2021 all contributors
# License: AGPL-3.0+
# front-end for the "lei convert" sub-command
package PublicInbox::LeiConvert;
use strict;
use v5.10.1;
use parent qw(PublicInbox::IPC);
use PublicInbox::Eml;
use PublicInbox::LeiStore;
use PublicInbox::LeiOverview;
sub mbox_cb {
my ($eml, $self) = @_;
my @kw = PublicInbox::LeiStore::mbox_keywords($eml);
$eml->header_set($_) for qw(Status X-Status);
$self->{wcb}->(undef, { kw => \@kw }, $eml);
}
sub net_cb { # callback for ->imap_each, ->nntp_each
my (undef, undef, $kw, $eml, $self) = @_; # @_[0,1]: url + uid ignored
$self->{wcb}->(undef, { kw => $kw }, $eml);
}
sub mdir_cb {
my ($f, $kw, $eml, $self) = @_;
$self->{wcb}->(undef, { kw => $kw }, $eml);
}
sub convert_fh ($$$$) {
my ($self, $ifmt, $fh, $name) = @_;
if ($ifmt eq 'eml') {
my $buf = do { local $/; <$fh> } //
return $self->{lei}->child_error(1 << 8, <<"");
error reading $name: $!
my $eml = PublicInbox::Eml->new(\$buf);
$self->{wcb}->(undef, { kw => [] }, $eml);
} else {
PublicInbox::MboxReader->$ifmt($fh, \&mbox_cb, $self);
}
}
sub do_convert { # via wq_do
my ($self) = @_;
my $lei = $self->{lei};
my $in_fmt = $lei->{opt}->{'in-format'};
my $mics;
if (my $stdin = delete $self->{0}) {
convert_fh($self, $in_fmt, $stdin, '');
}
for my $input (@{$self->{inputs}}) {
my $ifmt = lc($in_fmt // '');
if ($input =~ m!\Aimaps?://!) {
$lei->{net}->imap_each($input, \&net_cb, $self);
next;
} elsif ($input =~ m!\A(?:nntps?|s?news)://!) {
$lei->{net}->nntp_each($input, \&net_cb, $self);
next;
} elsif ($input =~ s!\A([a-z0-9]+):!!i) {
$ifmt = lc $1;
}
if (-f $input) {
my $m = $lei->{opt}->{'lock'} //
($ifmt eq 'eml' ? ['none'] :
PublicInbox::MboxLock->defaults);
my $mbl = PublicInbox::MboxLock->acq($input, 0, $m);
convert_fh($self, $ifmt, $mbl->{fh}, $input);
} elsif (-d _) {
PublicInbox::MdirReader::maildir_each_eml($input,
\&mdir_cb, $self);
} else {
die "BUG: $input unhandled"; # should've failed earlier
}
}
delete $lei->{1};
delete $self->{wcb}; # commit
}
sub call { # the main "lei convert" method
my ($cls, $lei, @inputs) = @_;
my $opt = $lei->{opt};
$opt->{kw} //= 1;
my $self = $lei->{cnv} = bless {}, $cls;
my $in_fmt = $opt->{'in-format'};
my (@f, @d);
$opt->{dedupe} //= 'none';
my $ovv = PublicInbox::LeiOverview->new($lei, 'out-format');
$lei->{l2m} or return
$lei->fail("output not specified or is not a mail destination");
my $net = $lei->{net}; # NetWriter may be created by l2m
$opt->{augment} = 1 unless $ovv->{dst} eq '/dev/stdout';
if ($opt->{stdin}) {
@inputs and return $lei->fail("--stdin and @inputs do not mix");
$lei->check_input_format(undef) or return;
$self->{0} = $lei->{0};
}
# e.g. Maildir:/home/user/Mail/ or imaps://example.com/INBOX
for my $input (@inputs) {
my $input_path = $input;
if ($input =~ m!\A(?:imaps?|nntps?|s?news)://!i) {
require PublicInbox::NetReader;
$net //= PublicInbox::NetReader->new;
$net->add_url($input);
} elsif ($input_path =~ s/\A([a-z0-9]+)://is) {
my $ifmt = lc $1;
if (($in_fmt // $ifmt) ne $ifmt) {
return $lei->fail(<<"");
--in-format=$in_fmt and `$ifmt:' conflict
}
if (-f $input_path) {
require PublicInbox::MboxLock;
require PublicInbox::MboxReader;
PublicInbox::MboxReader->can($ifmt) or return
$lei->fail("$ifmt not supported");
} elsif (-d _) {
require PublicInbox::MdirReader;
$ifmt eq 'maildir' or return
$lei->fail("$ifmt not supported");
} else {
return $lei->fail("Unable to handle $input");
}
} elsif (-f $input) { push @f, $input }
elsif (-d _) { push @d, $input }
else { return $lei->fail("Unable to handle $input") }
}
if (@f) { $lei->check_input_format(\@f) or return }
if (@d) { # TODO: check for MH vs Maildir, here
require PublicInbox::MdirReader;
}
$self->{inputs} = \@inputs;
if ($net) {
if (my $err = $net->errors) {
return $lei->fail($err);
}
$net->{quiet} = $opt->{quiet};
$lei->{net} //= $net;
}
my $op = $lei->workers_start($self, 'lei_convert', 1, {
'' => [ $lei->can('dclose'), $lei ]
});
$self->wq_io_do('do_convert', []);
$self->wq_close(1);
while ($op && $op->{sock}) { $op->event_step }
}
sub ipc_atfork_child {
my ($self) = @_;
my $lei = $self->{lei};
$lei->lei_atfork_child;
my $l2m = delete $lei->{l2m};
if (my $net = $lei->{net}) { # may prompt user once
$net->{mics_cached} = $net->imap_common_init($lei);
$net->{nn_cached} = $net->nntp_common_init($lei);
}
$SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
$l2m->pre_augment($lei);
$l2m->do_augment($lei);
$l2m->post_augment($lei);
$self->{wcb} = $l2m->write_cb($lei);
$self->SUPER::ipc_atfork_child;
}
1;