From 563206c94db52f7e0e6d899fef2681c9e63f8fee Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Wed, 11 Jan 2023 11:00:49 +0000
Subject: hoist MailDiff and ContentDigestDbg out of lei

These will be reused in the web UI, too.
---
 lib/PublicInbox/MailDiff.pm | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 lib/PublicInbox/MailDiff.pm

(limited to 'lib/PublicInbox/MailDiff.pm')

diff --git a/lib/PublicInbox/MailDiff.pm b/lib/PublicInbox/MailDiff.pm
new file mode 100644
index 00000000..06eb3a0d
--- /dev/null
+++ b/lib/PublicInbox/MailDiff.pm
@@ -0,0 +1,50 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+package PublicInbox::MailDiff;
+use v5.12;
+use File::Temp 0.19 (); # 0.19 for ->newdir
+use PublicInbox::ContentHash qw(content_digest);
+use PublicInbox::ContentDigestDbg;
+use Data::Dumper ();
+use PublicInbox::MsgIter qw(msg_part_text);
+
+sub write_part { # Eml->each_part callback
+	my ($ary, $self) = @_;
+	my ($part, $depth, $idx) = @$ary;
+	if ($idx ne '1' || $self->{-raw_hdr}) {
+		open my $fh, '>', "$self->{curdir}/$idx.hdr" or die "open: $!";
+		print $fh ${$part->{hdr}} or die "print $!";
+		close $fh or die "close $!";
+	}
+	my $ct = $part->content_type || 'text/plain';
+	my ($s, $err) = msg_part_text($part, $ct);
+	my $sfx = defined($s) ? 'txt' : 'bin';
+	open my $fh, '>', "$self->{curdir}/$idx.$sfx" or die "open: $!";
+	print $fh ($s // $part->body) or die "print $!";
+	close $fh or die "close $!";
+}
+
+# public
+sub dump_eml ($$$) {
+	my ($self, $dir, $eml) = @_;
+	local $self->{curdir} = $dir;
+	mkdir $dir or die "mkdir($dir): $!";
+	$eml->each_part(\&write_part, $self);
+
+	open my $fh, '>', "$dir/content_digest" or die "open: $!";
+	my $dig = PublicInbox::ContentDigestDbg->new($fh);
+	local $Data::Dumper::Useqq = 1;
+	local $Data::Dumper::Terse = 1;
+	content_digest($eml, $dig);
+	print $fh "\n", $dig->hexdigest, "\n" or die "print $!";
+	close $fh or die "close: $!";
+}
+
+# public
+sub prep_a ($$) {
+	my ($self, $eml) = @_;
+	$self->{tmp} = File::Temp->newdir('mail-diff-XXXX', TMPDIR => 1);
+	dump_eml($self, "$self->{tmp}/a", $eml);
+}
+
+1;
-- 
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