Always return location IDs from SwitchableHttpCachePurger::purge #131
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This fixes clearing view caches in legacy admin interface running in
legacy_mode: false
, e.g. Netgen Admin UI.eZ Publish Legacy expects that
content/cache
events always return locationIDs they were given (https://github.com/ezsystems/ezpublish-legacy/blob/master/kernel/classes/ezcontentcachemanager.php#L772).
In eZ Publish kernel 6.x, there was an InstantCachePurger that did this
(https://github.com/ezsystems/ezpublish-kernel/blob/6.13/eZ/Publish/Core/MVC/Symfony/Cache/Http/InstantCachePurger.php#L61-L66),
but in 7.0 (and presumably with 6.x with new HttpCacheBundle turned on),
this does not happen.
So here, we make sure that location IDs are always returned, no matter what.