Ticket Organisation Hooks

Hook::add('gate:ticket.merge', 10, function ($primary_id, $merge_ids) {
    // Everything but the target is DELETED: this cannot be undone.
    foreach ($merge_ids as $id)
        if (Acme::underLegalHold((int) $id)) return 'A ticket under legal hold cannot be merged.';

    return null;
});

Hook::add('action:ticket.merged', 10, function ($primary_id, $merged_ids) {
    // Those ids are gone: point them at the target.
    foreach ($merged_ids as $id) Acme::redirectRef((int) $id, $primary_id);
});

Hook::add('gate:ticket.split', 10, function ($source, $reply_ids) {
    // The list has not been checked against the database yet.
    if (count($reply_ids) > 50) return 'At most 50 replies can move at once.';

    return null;
});

Hook::add('action:ticket.split', 10, function ($source, $new_ticket, $moved_reply_ids) {
    // This list is verified: what really moved.
    Acme::reindexSplit((int) ($new_ticket['id'] ?? 0), $moved_reply_ids);
});

Hook::add('action:ticket.department_changed', 10,
    function ($ticket, $oldDepartmentId, $newDepartmentId) {
        // The department decides who sees it.
        Acme::notifyDepartment($newDepartmentId, (int) ($ticket['id'] ?? 0));
    });

Hook::add('action:ticket.priority_changed', 10,
    function ($ticket, $oldPriority, $newPriority) {
        if ($newPriority > $oldPriority) Acme::escalate((int) ($ticket['id'] ?? 0));
    });

Hook::add('action:ticket.service_changed', 10,
    function ($ticket, $oldServiceId, $newServiceId) {
        // Zero means the link was removed.
        if (!$newServiceId) return;

        Acme::attachServiceContext((int) ($ticket['id'] ?? 0), $newServiceId);
    });