Bug 39658: Add Koha::Exceptions::PatronAccountLink

Add typed exceptions for patron account linking:
- AlreadyLinked: patrons already in same group
- DifferentGroups: patrons in different groups
Signed-off-by: Trevor Diamond <trevor.diamond@mainlib.org>
Signed-off-by: Kellie Stephens <kellie.stephens@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Pedro Amorim <pedro.amorim@openfifth.co.uk>

Koha/Exceptions/PatronAccountLink.pm

@@ -0,0 +1,56 @@
+package Koha::Exceptions::PatronAccountLink;
+
+# This file is part of Koha.
+#
+# Koha is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Koha is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <https://www.gnu.org/licenses>.
+
+use Modern::Perl;
+
+use Koha::Exception;
+
+use Exception::Class (
+    'Koha::Exceptions::PatronAccountLink' => {
+        isa => 'Koha::Exception',
+    },
+    'Koha::Exceptions::PatronAccountLink::AlreadyLinked' => {
+        isa         => 'Koha::Exceptions::PatronAccountLink',
+        description => "Patrons are already linked together",
+    },
+    'Koha::Exceptions::PatronAccountLink::DifferentGroups' => {
+        isa         => 'Koha::Exceptions::PatronAccountLink',
+        description => "Both patrons already belong to different link groups",
+    },
+);
+
+=head1 NAME
+
+Koha::Exceptions::PatronAccountLink - Base class for PatronAccountLink exceptions
+
+=head1 Exceptions
+
+=head2 Koha::Exceptions::PatronAccountLink
+
+Generic PatronAccountLink exception
+
+=head2 Koha::Exceptions::PatronAccountLink::AlreadyLinked
+
+Exception to be used when patrons are already linked together.
+
+=head2 Koha::Exceptions::PatronAccountLink::DifferentGroups
+
+Exception to be used when both patrons already belong to different link groups.
+
+=cut
+
+1;