# Copyright (C) 2021 all contributors
# License: AGPL-3.0+
# front-end for the "lei import" sub-command
package PublicInbox::LeiImport;
use strict;
use v5.10.1;
use parent qw(PublicInbox::IPC);
use PublicInbox::Eml;
use PublicInbox::PktOp qw(pkt_do);
sub _import_eml { # MboxReader callback
my ($eml, $sto, $set_kw) = @_;
$sto->ipc_do('set_eml', $eml, $set_kw ? $sto->mbox_keywords($eml) : ());
}
sub import_done_wait { # dwaitpid callback
my ($arg, $pid) = @_;
my ($imp, $lei) = @$arg;
$lei->child_error($?, 'non-fatal errors during import') if $?;
my $sto = delete $lei->{sto};
my $wait = $sto->ipc_do('done') if $sto; # PublicInbox::LeiStore::done
$lei->dclose;
}
sub import_done { # EOF callback for main daemon
my ($lei) = @_;
my $imp = delete $lei->{imp} or return;
$imp->wq_wait_old(\&import_done_wait, $lei);
}
sub net_merge_complete { # callback used by LeiAuth
my ($self) = @_;
for my $input (@{$self->{inputs}}) {
$self->wq_io_do('import_path_url', [], $input);
}
$self->wq_close(1);
}
sub import_start {
my ($lei) = @_;
my $self = $lei->{imp};
my $j = $lei->{opt}->{jobs} // scalar(@{$self->{inputs}}) || 1;
if (my $net = $lei->{net}) {
# $j = $net->net_concurrency($j); TODO
} else {
my $nproc = $self->detect_nproc;
$j = $nproc if $j > $nproc;
}
my $ops = { '' => [ \&import_done, $lei ] };
$lei->{auth}->op_merge($ops, $self) if $lei->{auth};
$self->{-wq_nr_workers} = $j // 1; # locked
my $op = $lei->workers_start($self, 'lei_import', undef, $ops);
$self->wq_io_do('import_stdin', []) if $self->{0};
net_merge_complete($self) unless $lei->{auth};
while ($op && $op->{sock}) { $op->event_step }
}
sub call { # the main "lei import" method
my ($cls, $lei, @inputs) = @_;
my $sto = $lei->_lei_store(1);
$sto->write_prepare($lei);
my ($net, @f, @d);
$lei->{opt}->{kw} //= 1;
my $self = $lei->{imp} = bless { inputs => \@inputs }, $cls;
if ($lei->{opt}->{stdin}) {
@inputs and return $lei->fail("--stdin and @inputs do not mix");
$lei->check_input_format or return;
$self->{0} = $lei->{0};
}
my $fmt = $lei->{opt}->{'in-format'};
# 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 $1;
if (($fmt // $ifmt) ne $ifmt) {
return $lei->fail(<<"");
--in-format=$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} = $lei->{opt}->{quiet};
$lei->{net} = $net;
require PublicInbox::LeiAuth;
$lei->{auth} = PublicInbox::LeiAuth->new;
}
import_start($lei);
}
sub ipc_atfork_child {
my ($self) = @_;
my $lei = $self->{lei};
delete $lei->{imp}; # drop circular ref
$lei->lei_atfork_child;
$self->SUPER::ipc_atfork_child;
$lei->{auth}->do_auth_atfork($self) if $lei->{auth};
undef;
}
sub _import_fh {
my ($lei, $fh, $input, $ifmt) = @_;
my $set_kw = $lei->{opt}->{kw};
eval {
if ($ifmt eq 'eml') {
my $buf = do { local $/; <$fh> } //
return $lei->child_error(1 << 8, <<"");
error reading $input: $!
my $eml = PublicInbox::Eml->new(\$buf);
_import_eml($eml, $lei->{sto}, $set_kw);
} else { # some mbox (->can already checked in call);
my $cb = PublicInbox::MboxReader->can($ifmt) //
die "BUG: bad fmt=$ifmt";
$cb->(undef, $fh, \&_import_eml, $lei->{sto}, $set_kw);
}
};
$lei->child_error(1 << 8, "$input: $@") if $@;
}
sub _import_maildir { # maildir_each_file cb
my ($f, $sto, $set_kw) = @_;
$sto->ipc_do('set_eml_from_maildir', $f, $set_kw);
}
sub _import_net { # imap_each, nntp_each cb
my ($url, $uid, $kw, $eml, $sto, $set_kw) = @_;
$sto->ipc_do('set_eml', $eml, $set_kw ? @$kw : ());
}
sub import_path_url {
my ($self, $input) = @_;
my $lei = $self->{lei};
my $ifmt = lc($lei->{opt}->{'in-format'} // '');
# TODO auto-detect?
if ($input =~ m!\Aimaps?://!i) {
$lei->{net}->imap_each($input, \&_import_net, $lei->{sto},
$lei->{opt}->{kw});
return;
} elsif ($input =~ m!\A(?:nntps?|s?news)://!i) {
$lei->{net}->nntp_each($input, \&_import_net, $lei->{sto}, 0);
return;
} elsif ($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, $m);
_import_fh($lei, $mbl->{fh}, $input, $ifmt);
} elsif (-d _ && (-d "$input/cur" || -d "$input/new")) {
return $lei->fail(<{sto}, $lei->{opt}->{kw});
} else {
$lei->fail("$input unsupported (TODO)");
}
}
sub import_stdin {
my ($self) = @_;
my $lei = $self->{lei};
_import_fh($lei, delete $self->{0}, '', $lei->{opt}->{'in-format'});
}
no warnings 'once'; # the following works even when LeiAuth is lazy-loaded
*net_merge_all = \&PublicInbox::LeiAuth::net_merge_all;
1;