Catch exceptions when JSON decoding fails

[Toflar]

If somehow there's an error writing the config to the storage, you'll end up getting Uncaught PHP Exception Contao\Image\Exception\JsonException: "Syntax error" at DeferredImageStorageFilesystem.php line 210 because the has() check does not validate the syntax.

[ausi]

Shouldn’t this be handled by the storage itself instead?

[Toflar]

Sure, I just quickly proposed a fix but can be different. You mean, has() should already check that? Because if has() returns true and then get() returns null anyway, that would be weird :D

[ausi]

You mean, has() should already check that? Because if has() returns true and then get() returns null anyway, that would be weird :D

I think the get() call should delete the file in the storage internally while still throwing the exception. The resizer should just ignore the exception.

I implemented this now and pushed to your branch, do you agree with my changes?

[Toflar]

LGTM