#!/usr/bin/perl -w
# Copyright (C) 2019 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# Used for purging messages entirely from a public-inbox.  Currently
# supports v2 inboxes only, for now.
use strict;
use warnings;
use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
use PublicInbox::AdminEdit;
PublicInbox::Admin::check_require('-index');
use PublicInbox::Filter::Base qw(REJECT);
use PublicInbox::MIME;
require PublicInbox::V2Writable;

my $usage = "$0 [--all] [INBOX_DIRS] </path/to/message";
my $opt = { verbose => 1, all => 0, -min_inbox_version => 2 };
GetOptions($opt, @PublicInbox::AdminEdit::OPT) or
	die "bad command-line args\n$usage\n";

my @ibxs = PublicInbox::Admin::resolve_inboxes(\@ARGV, $opt);
PublicInbox::AdminEdit::check_editable(\@ibxs);

my $data = do { local $/; scalar <STDIN> };
$data =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
my $n_purged = 0;

foreach my $ibx (@ibxs) {
	my $mime = PublicInbox::MIME->new($data);
	my $v2w = PublicInbox::V2Writable->new($ibx, 0);

	my $commits = $v2w->purge($mime) || [];

	if (my $scrub = $ibx->filter($v2w)) {
		my $scrubbed = $scrub->scrub($mime, 1);

		if ($scrubbed && $scrubbed != REJECT()) {
			my $scrub_commits = $v2w->purge($scrubbed);
			push @$commits, @$scrub_commits if $scrub_commits;
		}
	}

	$v2w->done;

	if ($opt->{verbose}) { # should we consider this machine-parseable?
		PublicInbox::AdminEdit::show_rewrites(\*STDOUT, $ibx, $commits);
	}
	$n_purged += scalar @$commits;
}

# behave like "rm -f"
exit(0) if ($opt->{force} || $n_purged);

warn "Not found\n" if $opt->{verbose};
exit(1);