com.aba.market.fetch.impl.CrestMarketOrderFetcher.java Source code

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Here is the source code for com.aba.market.fetch.impl.CrestMarketOrderFetcher.java

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/*
 * Copyright 2016 maurerit
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
 */

package com.aba.market.fetch.impl;

import com.aba.market.comparator.CrestMarketOrderPriceComparator;
import com.aba.market.fetch.MarketOrderFetcher;
import lombok.Setter;
import org.devfleet.crest.CrestService;
import org.devfleet.crest.model.CrestMarketOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.OptionalDouble;
import java.util.stream.Collectors;

/**
 * Created by maurerit on 7/26/2016.
 */
@Service
@Setter
public class CrestMarketOrderFetcher implements MarketOrderFetcher {
    @Autowired
    private CrestService crestService;

    @Override
    public List<CrestMarketOrder> getMarketSellOrders(long regionId, long itemId) {
        return crestService.getMarketOrders(regionId, "sell", itemId);
    }

    @Override
    @Cacheable("lowest-sell-price")
    public Double getLowestSellPrice(long regionId, long systemId, long itemId) {
        Double result = null;

        //Used in the below lambda, needs to be final
        final Long hubIdToFind = getHubStationIdToUse(systemId);

        List<CrestMarketOrder> sellOrders = getMarketSellOrders(regionId, itemId);

        OptionalDouble price = sellOrders.stream().filter(order -> order.getLocationId() == hubIdToFind)
                .mapToDouble(order -> order.getPrice()).findFirst();

        if (price.isPresent()) {
            result = price.getAsDouble();
        }

        return result;
    }

    @Override
    @Cacheable("price-for-quantity")
    public Double getPriceForQuantity(long regionId, long systemId, long itemId, long quantity) {
        Double result = 0d;

        //TODO: For now I'm concerned with sell orders and from Amarr and Jita.
        final long hubIdToFind = getHubStationIdToUse(systemId);

        List<CrestMarketOrder> sellOrders = getMarketSellOrders(regionId, itemId);

        List<CrestMarketOrder> filteredSellOrders = sellOrders.stream()
                .filter(order -> order.getLocationId() == hubIdToFind).sorted(new CrestMarketOrderPriceComparator())
                .collect(Collectors.toList());

        int totalFound = 0;
        double totalPrice = 0d;

        for (CrestMarketOrder crestMarketOrder : filteredSellOrders) {
            if (quantity > totalFound) {
                totalFound += crestMarketOrder.getVolume();
                totalPrice += crestMarketOrder.getVolume() * crestMarketOrder.getPrice();
            } else if (quantity <= totalFound) {
                break;
            }
        }

        result = totalPrice / totalFound;

        return result;
    }

    private Long getHubStationIdToUse(long systemId) {
        //TODO: For now, use Jita and AMARR hard coded ids
        Long jitaId = 30000142l;
        Long amarrId = 30002187l;
        //TODO: For now, I'm concerned with Amarr and Jita, hard coding the hub stations id's
        Long jitaFourMoonFourId = 60003760l;
        Long amarrEightId = 60008494l;
        return systemId == jitaId ? jitaFourMoonFourId : amarrEightId;
    }
}