# frozen_string_literal: true require 'oj' require_relative '../cache/redis.rb' module EodFacade class Options < ::EodFacade::Base class << self def call(symbol) underlying = EodServices::Contract.underlying_symbol(symbol) expiry = EodServices::Contract.contract_expiry(symbol) option_type = contract_type(symbol) unless expiry raise ArgumentError, "Invalid expiration date for option #{symbol}" end unless Cache::RedisCache.get(redis_key(underlying, expiry)) response = make_request(url_path(underlying)) unless response.success? raise ArgumentError, "Error fetching options data for #{underlying}" end Cache::RedisCache.set( redis_key(underlying, expiry), response.parsed_response.to_json ) end contracts = Oj.load(Cache::RedisCache.get(redis_key(underlying, expiry))) contract_hash( symbol: symbol, contracts: contracts, option_type: option_type ) end private def params(expiry) { from: expiry.to_s, to: expiry.to_s } end def url_path(underlying) "/options/#{underlying}" end def contract_hash(symbol:, contracts:, option_type:) by_expiration = contracts['data'].first expiration_date = by_expiration && by_expiration['expirationDate'] by_option_type = by_expiration && by_expiration['options'][option_type] contract = by_option_type&.find do |c| c['contractName'] == symbol end raise ArgumentError, "Contract #{symbol} not found" unless contract contract.merge('expirationDate' => expiration_date) end def contract_type(symbol) option_type = EodServices::Contract.contract_type(symbol) case option_type when EodModels::OptionType::CALL 'CALL' when EodModels::OptionType::PUT 'PUT' else 'STOCK' end end def redis_key(underlying, expiry) "#{underlying}_#{expiry.to_s}_options" end end end end