59 lines
1.7 KiB
TypeScript
59 lines
1.7 KiB
TypeScript
import { esiAxiosInstance } from "@/service";
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export const jitaId = 10000002;
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export type MarketOrderHistory = {
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average: number;
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date: string;
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highest: number;
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lowest: number;
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order_count: number;
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volume: number;
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}
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export const getHistory = async (regionId: number, tyeId: number): Promise<MarketOrderHistory[]> => (await esiAxiosInstance.get(`/markets/${regionId}/history/`, { params: { type_id: tyeId } })).data;
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export const getHistoryQuartils = async (regionId: number, tyeId: number): Promise<[number, number, number]> => {
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const history = await getHistory(regionId, tyeId);
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const volumes = history
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.flatMap(h => {
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const volume = h.volume;
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if (volume === 0) {
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return [];
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}
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const e = estimateVolume(h);
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return [[h.highest, e], [h.lowest, volume - e]];
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})
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.filter(h => h[1] > 0)
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.sort((a, b) => a[0] - b[0]);
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const totalVolume = volumes.reduce((acc, [_, v]) => acc + v, 0);
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const quartilVolume = totalVolume / 4;
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const quartils: [number, number, number] = [0, 0, 0];
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let currentVolume = 0;
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let quartil = 0;
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for (const [price, volume] of volumes) {
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currentVolume += volume;
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if (currentVolume >= quartilVolume * (quartil + 1)) {
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quartils[quartil] = price;
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if (quartil === 2) {
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break;
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}
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quartil++;
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}
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}
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return quartils;
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}
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const estimateVolume = (history: MarketOrderHistory): number => {
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if (history.volume === 0) {
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return 0;
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}
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return Math.max(1, Math.round(history.volume * ((history.average - history.lowest) / (history.highest - history.lowest))));
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} |