artsy/garner

module Garner
  module Strategies
    module Context
      module Key
        class RequestPost < Base
          def self.field
            :request_params
          end

          # Injects the request POST parameters into the key hash.
          #
          # @param identity [Garner::Cache::Identity] The cache identity.
          # @param ruby_context [Object] An optional Ruby context.
          # @return [Garner::Cache::Identity] The modified identity.
          def self.apply(identity, ruby_context = nil)
            return super unless ruby_context.respond_to?(:request)

            request = ruby_context.request
            if request.request_method == 'POST'
              identity = identity.key(field => request.POST.dup)
            end
            identity
          end
        end
      end
    end
  end
end