discourse/lib/compression/engine.rb

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# frozen_string_literal: true
module Compression
class Engine
UnsupportedFileExtension = Class.new(StandardError)
def self.default_strategies
[
Compression::Zip.new,
Compression::Pipeline.new([Compression::Tar.new, Compression::Gzip.new]),
Compression::Gzip.new,
Compression::Tar.new
]
end
def self.engine_for(filename, strategies: default_strategies)
strategy = strategies.detect(-> { raise UnsupportedFileExtension }) { |e| e.can_handle?(filename) }
new(strategy)
end
def initialize(strategy)
@strategy = strategy
end
delegate :extension, :decompress, :compress, :strip_directory, to: :@strategy
end
end