Symfony remove cached images using liipImagine

Question

I'm trying to remove cached images (which are created with LiipImagineBundle) when the source image is deleted or updated. I have already found out that it could be done using CacheManager ( https://github.com/liip/LiipImagineBundle/issues/132 ) The problem is that I can't figure it out how to use it exactly. What else do I need to add (like libraries) to my code despite these three lines:

    $cacheManager = $this->get('liip_imagine.cache.manager');
    $cacheManager->resolve($this->getRequest(),$pngPath,$filter);
    $cacheManager->remove($pngPath, $filter);

I believe there should be something like

    $cacheManager = new CacheManager();

I would really appreciate if anyone could explain me how to do that in more detail.

Answer 1

So, for example in your controller:

/**
* Remove an image in the cache based on its relative path and the filter applied to it
*
* @param string $path
* @param string $filter
*
* @return void
*/
protected function removeCachedImageAction($path, $filter)
{
    $cacheManager = $this->container->get('liip_imagine.cache.manager');

    // Remove the cached image corresponding to that path & filter, if it is stored
    if ($cacheManager->isStored($path, $filter)) {
        $cacheManager->remove($path, $filter);
    }

}

/**
* An action that doesn't do much except testing the function above
*
* @param Request $request
*
* @return void
*/
protected function whateverAction(Request $request)
{
    $path = //... probably from the request
    $filter = //... probably from the request

    // Remove the cached image
    $this->removeCachedImage($path, $filter);

    // ...

}

---

As you can see in the CacheManager, the function that you'd like to use is:

public function remove($paths = null, $filters = null){ ... }

• If $paths is null, the function assumes that you want to remove the cached images for ALL PATHS that have been resolved with the $filters provided.

• If $filters is null, the function assumes that you want to remove the cached images corresponding for the $paths provided and that have previously been resolved with ALL FILTERS.

• If $paths and $filters are null, the function assumes that you want to remove the cached images corresponding to ALL PATHS and for ALL FILTERS. Basically ALL CACHED IMAGES.