feed-me Empty feed does not disable/delete existing elements

Description

When a feed has "Disable/delete missing elements" enabled and the processed feed is empty no elements are disabled/deleted.

Steps to reproduce

Feed with Disable/delete missing elements
Run feed without results.

Additional info

I believe the following lines in the afterProcessFeed function in the Process service are responsible. In this case $processedElementIds is an empty array.

if ($processedElementIds) {
    $elementsToDeleteDisable = array_diff($settings['existingElements'], $processedElementIds);
    if ($elementsToDeleteDisable) {
        if (DuplicateHelper::isDisable($feed)) {
            $this->_service->disable($elementsToDeleteDisable);
            $message = 'The following elements have been disabled: ' . Json::encode($elementsToDeleteDisable) . '.';
        } elseif (DuplicateHelper::isDisableForSite($feed)) {
            $this->_service->disableForSite($elementsToDeleteDisable);
            $message = 'The following elements have been disabled for the target site: ' . Json::encode($elementsToDeleteDisable) . '.';
        } else {
            $this->_service->delete($elementsToDeleteDisable);
            $message = 'The following elements have been deleted: ' . Json::encode($elementsToDeleteDisable) . '.';
        }

        Plugin::info($message);
        Plugin::debug($message);
    }
}

Craft version: 4.5.3
PHP version: 8.1
Database driver & version: MySQL 5.7
Plugins & versions: Feed me 5.2.0

Aug 31 '23 09:08 murphy1484

Just found out the same issue. Would be a nice feature to delete all entries if the data is empty. Weird it doesn't work like that out of the box.

Sep 05 '23 12:09 sander-lameco

Also discovered this just now.

I would have thought the process would just take from settings e.g. if you chose to delete missing entries, then an empty feed will delete all missing entries ... same for disable.