scan front

src/market/scan/scan.ts

@@ -0,0 +1,53 @@
+import { getHistory, getHistoryQuartils, HistoryQuartils, MarketType, MarketTypePrice } from "@/market";
+import { MarketScanResponse } from "@/generated/mammon";
+
+export type ScanResult = {
+    type: MarketType;
+    buy: number;
+    sell: number;
+    q1: number;
+    median: number;
+    q3: number;
+    totalVolume: number;
+    profit: number;
+    score: number;
+}
+
+// Mirrors mammon's MarketScoreCalculator so the client-side path matches the backend scan.
+export const calculateScore = (quartils: HistoryQuartils, profit: number, orderCount: number, days: number): number => {
+    if (profit <= 0) {
+        return 0;
+    }
+    return Math.sqrt((Math.pow(quartils.totalVolume, 1.1) * Math.pow(quartils.q1, 1.2) * Math.pow(profit, 0.5) * Math.pow(Math.max(1, orderCount), -0.7)) / days);
+}
+
+export const toScanResult = (res: MarketScanResponse, type: MarketType, price: MarketTypePrice): ScanResult => ({
+    type,
+    buy: price.buy,
+    sell: price.sell,
+    q1: res.q1,
+    median: res.median,
+    q3: res.q3,
+    totalVolume: res.totalVolume,
+    profit: res.profit,
+    score: res.score,
+});
+
+// Client-side scan result for a single type (used where the scan endpoint can't be queried per-type).
+export const buildScanResult = async (price: MarketTypePrice, days: number, calculateProfit: (buy: number, sell: number) => number): Promise<ScanResult> => {
+    const history = await getHistory(price.type.id);
+    const quartils = getHistoryQuartils(history, days);
+    const profit = quartils.q1 === 0 || quartils.q3 === 0 ? 0 : calculateProfit(quartils.q1, quartils.q3);
+
+    return {
+        type: price.type,
+        buy: price.buy,
+        sell: price.sell,
+        q1: quartils.q1,
+        median: quartils.median,
+        q3: quartils.q3,
+        totalVolume: quartils.totalVolume,
+        profit,
+        score: calculateScore(quartils, profit, price.orderCount, days),
+    };
+}