From 89990b0cfc8bbdabc8d650325d9e1bc585df8a0c Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Sat, 5 Dec 2020 10:11:37 +0000
Subject: inbox: simplify ->search and callers

Stop leaking WWW/PSGI-specific logic into classes like
PublicInbox::Inbox, which is used universally.

We'll also decouple $ibx->over from $ibx->search and just deal
with duplicate the code inside ->over to reduce argument
complexity in ->search.

This is also a step in moving away from using {psgi.errors}
to ease code sharing between IMAP, NNTP, and command-line
interfaces.  Perl's built-in `warn' and `local $SIG{__WARN__}'
provides all the flexibility we need to control warning output
and should be universally understood by Perl hackers who may
be unfamiliar with PSGI.
---
 lib/PublicInbox/Mbox.pm | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

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

diff --git a/lib/PublicInbox/Mbox.pm b/lib/PublicInbox/Mbox.pm
index 47025891..22516998 100644
--- a/lib/PublicInbox/Mbox.pm
+++ b/lib/PublicInbox/Mbox.pm
@@ -203,16 +203,22 @@ sub mbox_all_ids {
 	PublicInbox::MboxGz::mbox_gz($ctx, \&all_ids_cb, 'all');
 }
 
+sub gone ($$) {
+	my ($ctx, $what) = @_;
+	warn "W: `$ctx->{-inbox}->{inboxdir}' $what went away unexpectedly\n";
+	undef;
+}
+
 sub results_cb {
 	my ($ctx) = @_;
-	my $over = $ctx->{-inbox}->over or return;
+	my $over = $ctx->{-inbox}->over or return gone($ctx, 'over');
 	while (1) {
 		while (defined(my $num = shift(@{$ctx->{ids}}))) {
 			my $smsg = $over->get_art($num) or next;
 			return $smsg;
 		}
 		# refill result set
-		my $srch = $ctx->{-inbox}->search(undef, $ctx) or return;
+		my $srch = $ctx->{-inbox}->search or return gone($ctx,'search');
 		my $mset = $srch->mset($ctx->{query}, $ctx->{qopts});
 		my $size = $mset->size or return;
 		$ctx->{qopts}->{offset} += $size;
@@ -223,7 +229,7 @@ sub results_cb {
 sub results_thread_cb {
 	my ($ctx) = @_;
 
-	my $over = $ctx->{-inbox}->over or return;
+	my $over = $ctx->{-inbox}->over or return gone($ctx, 'over');
 	while (1) {
 		while (defined(my $num = shift(@{$ctx->{xids}}))) {
 			my $smsg = $over->get_art($num) or next;
@@ -234,7 +240,7 @@ sub results_thread_cb {
 		next if $over->expand_thread($ctx);
 
 		# refill result set
-		my $srch = $ctx->{-inbox}->search(undef, $ctx) or return;
+		my $srch = $ctx->{-inbox}->search or return gone($ctx,'search');
 		my $mset = $srch->mset($ctx->{query}, $ctx->{qopts});
 		my $size = $mset->size or return;
 		$ctx->{qopts}->{offset} += $size;
-- 
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