Module: Audioproxy::Rails::BlobResolver

Defined in:
lib/audioproxy/rails/blob_resolver.rb

Overview

Turns ActiveStorage objects into the source strings the proxy speaks. Registered with the core by the railtie; the core itself never names an ActiveStorage constant (D5).

Defined Under Namespace

Modules: DiskLayout

Constant Summary collapse

SERVICES =

Dispatch is on the blob's service class, never on the configured service name — :amazon and :local are labels an app picks, and an app may well call its S3 service :local (D1).

Matched by class name rather than by constant, because naming ActiveStorage::Service::S3Service here would load its file, and that file requires aws-sdk-s3 — a gem an app storing on disk has no reason to bundle. Ancestor names, so an app's own subclass of a supported service resolves the way its parent does.

A Mirror service is not in this table and is not unwrapped to its primary (non-goal): it raises, naming the mirror, so the operator makes the choice of which service to point at rather than the gem guessing.

{
  "ActiveStorage::Service::S3Service" => :s3,
  "ActiveStorage::Service::DiskService" => :disk
}.freeze
SUPPORTED = 
"S3 and Disk".freeze

Class Method Summary collapse

Class Method Details

.call(source) ⇒ Object 



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# File 'lib/audioproxy/rails/blob_resolver.rb', line 41

def call(source)
  blob = unwrap(source)
  service = blob.service

  case kind_of_service(service)
  when :s3   then "s3://#{bucket_for(service)}/#{blob.key}"
  when :disk then "local://#{DiskLayout.relative_path_for(blob.key)}"
  else
    raise UnsupportedServiceError, unsupported_message(service)
  end
end