Dynamic options for Imagine filter

[petrjaros]

It's not possible to provide options to Imagine filter through a route. E.g. set an image size dynamically:

/media/cache/filter/path/to/my/file/file-800-600.png

for file

/path/to/my/file/file.png

My proposal is to add one more parameter in AvalancheImagineBundle configuration:

avalanche_imagine:
    filters:
        dynamic_size:
            type:    thumbnail
            options: { mode: outbound } #static options
            route: {directory}/{file}-{width}-{height}.{extension} #optional parameter
            #route: {directory}/{file}.{extension} #default setting of route parameter

Directory, file and extension parameters in the route are built-in and create the path to the file. Other parameters are sent to the filter, width and height are sent to the thumbnail filter in this case.
Twig filter could look like this:

'path/to/my/file/file.png'|apply_filter('dynamic_size', {width: 800, height: 600})

This solution has also one security issue - allows attacker to create huge amount of cached files. It could be solved with some constant number determinig the maximum number of possible caches per one image file.
What do you think about this? If you'll like this proposal I can make a pull request.

Peter

[avalanche123]

I think image size need to be configured to avoid security risks, it is a little more work but a much better result

[petrjaros]

Ok, it was only an example. Let's imagine another filter designed for image cropping or changing of the color... Sometimes it's not possible to create so many combinations in static configuration. The beauty of Imagine filters is lost in this bundle when you cannot set options dynamically.

[avalanche123]

I don't think it is bad to configure your filters in advance, any dynamic configuration from url is potentially abusable by end users