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# frozen_string_literal: true
module ActiveStorage::Blob::Identifiable
def identify
unless identified?
update! content_type: identify_content_type, identified: true
update_service_metadata
end
end
def identified?
identified
end
private
def identify_content_type
Marcel::MimeType.for download_identifiable_chunk, name: filename.to_s, declared_type: content_type
end
def download_identifiable_chunk
if byte_size.positive?
service.download_chunk key, 0...4.kilobytes
else
""
end
end
def update_service_metadata
service.update_metadata key, **service_metadata if service_metadata.any?
end
end
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