www: /$INBOX/$MSGID/d/ to diff reused Message-IDs

[public-inbox.git] / lib / PublicInbox / View.pm

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 071a20930827654fc0af9c0b0f1108d4bb5a4aa4..b8d6d85e77470737d4200718c4771d540dd08618 100644 (file)
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -623,7 +623,8 @@ sub _msg_page_prepare {
                        return;
                }
                $ctx->{-html_tip} =
-"<pre>WARNING: multiple messages have this Message-ID\n</pre><pre>";
+qq[<pre>WARNING: multiple messages have this Message-ID (<a
+href="d/">diff</a>)</pre><pre>];
        } else {
                $ctx->{first_hdr} = $eml->header_obj;
                $ctx->{chash} = content_hash($eml) if $ctx->{smsg}; # reused MID
@@ -1225,4 +1226,30 @@ sub ghost_index_entry {
                . '</pre>' . $end;
 }
 
+# /$INBOX/$MSGID/d/ endpoint
+sub diff_msg {
+       my ($ctx) = @_;
+       require PublicInbox::MailDiff;
+       my $ibx = $ctx->{ibx};
+       my $over = $ibx->over or return no_over_html($ctx);
+       my ($id, $prev);
+       my $md = bless { ctx => $ctx }, 'PublicInbox::MailDiff';
+       my $next_arg = $md->{next_arg} = [ $ctx->{mid}, \$id, \$prev ];
+       my $smsg = $md->{smsg} = $over->next_by_mid(@$next_arg) or
+               return; # undef == 404
+       $ctx->{-t_max} = $smsg->{ts};
+       $ctx->{-upfx} = '../../';
+       $ctx->{-apfx} = '//'; # fail on to_attr()
+       $ctx->{-linkify} = PublicInbox::Linkify->new;
+       my $mid = ascii_html($smsg->{mid});
+       $ctx->{-title_html} = "diff for duplicates of &lt;$mid&gt;";
+       PublicInbox::WwwStream::html_init($ctx);
+       print { $ctx->{zfh} } '<pre>diff for duplicates of &lt;<a href="../">',
+                               $mid, "</a>&gt;\n\n";
+       sub {
+               $ctx->attach($_[0]->([200, delete $ctx->{-res_hdr}]));
+               $md->begin_mail_diff;
+       };
+}
+
 1;