AS3CF (WP Offload) compatibility

[tijmenbruggeman]

Changes

• Remove AS3CF from the core of the plug-in. Having plug-in dependancies in our core logic is a bad practice as changes to a plug-in might affect our own codebase. Instead I made a new class that handles the integration. The integration itself is quite simple. The plug-in provides an action as3cf_pre_upload_object (ref) where we will compress it before offloading.

Integration Tests
The challenging part is that to have fully working integration tests we need to mock AWS (or any other provider) for AS3CF support. I've added localstack to the mock services so that we can mock S3. This allows us to mock the WP Offload functionality. The integration test command will also install as3cf lite.

Changes

• Added environment variables to wp-env to connect to localstack AWS. These variables will allow as3cf to connect.
• As we now have two "mock" servers, one being tinify and one AWS, I decided to use docker compose to manage them instead of seperate containers.
• Added localstack to the mocks. There is an initialization script that will add a bucket for WP Offload to use in tests.
• Remove a lot in the core of the plug-in because we have encapsulated all external plug-in logic into a seperate class.
• Added two filters from AS3CF in the fixtures to replace the client endpoints for AS3CF
• Added utility function to activate and deactivate plugins

Future improvements

• Add support when the local file is not present. AS3CF has the option to redownload the offloaded files so we could download them, compress and let the plug-in reoffload them. Will be one for a future PR as this will be to big for this PR.

[rkoopmans]

👍