initial commit

apps/backend/src/modules/quotes/bna.service.ts

@@ -0,0 +1,98 @@
+import { logger } from "../../lib/logger";
+import { prisma } from "../../lib/prisma";
+import { roundTo, startOfToday } from "../../lib/utils";
+
+interface DolaritoApiResponse {
+  oficial: {
+    buy: number;
+    sell: number;
+  };
+}
+
+export async function fetchBnaQuote(): Promise<{ buy: number; sell: number }> {
+  const response = await fetch("https://api.dolarito.ar/api/frontend/quotations/dolar", {
+    credentials: "omit",
+    headers: {
+      "User-Agent":
+        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0",
+      Accept: "application/json, text/plain, */*",
+      "Accept-Language": "es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3",
+      "auth-client": "a4b981d93266b37ea6a646f5b3538f8a",
+      "Sec-Fetch-Dest": "empty",
+      "Sec-Fetch-Mode": "cors",
+      "Sec-Fetch-Site": "same-site",
+    },
+    referrer: "https://www.dolarito.ar/",
+    method: "GET",
+    mode: "cors",
+  });
+  const data: DolaritoApiResponse = await response.json();
+  return { buy: data.oficial.buy, sell: data.oficial.sell };
+}
+
+export async function processBnaQuote(): Promise<void> {
+  const { buy, sell } = await fetchBnaQuote();
+
+  const existingQuote = await prisma.quote.findFirst({
+    where: { type: "BNA" },
+  });
+
+  if (!existingQuote) {
+    await prisma.quote.create({
+      data: {
+        buy,
+        sell,
+        type: "BNA",
+        difference: 0,
+        percentage: 0,
+        previousDayDifference: 0,
+        previousDayPercentage: 0,
+      },
+    });
+    await prisma.quoteHistory.create({
+      data: { buy, sell, type: "BNA" },
+    });
+    return;
+  }
+
+  const existingSell = Number(existingQuote.sell);
+  const diff = roundTo(sell - existingSell, 2);
+  const pct = existingSell !== 0 ? roundTo((diff / existingSell) * 100, 2) : 0;
+
+  logger.debug({ buy, sell, diferencia: diff, porcentaje: pct }, `Cotización BNA`);
+
+  const todayStart = startOfToday();
+
+  const prevDayHistory = await prisma.quoteHistory.findFirst({
+    where: {
+      type: "BNA",
+      timeStamp: { lt: todayStart },
+    },
+    orderBy: { timeStamp: "desc" },
+  });
+
+  let prevDayDiff = 0;
+  let prevDayPct = 0;
+  if (prevDayHistory) {
+    const prevSell = Number(prevDayHistory.sell);
+    prevDayDiff = roundTo(sell - prevSell, 2);
+    prevDayPct = prevSell !== 0 ? roundTo((prevDayDiff / prevSell) * 100, 2) : 0;
+  }
+
+  await prisma.quote.update({
+    where: { id: existingQuote.id },
+    data: {
+      buy,
+      sell,
+      timeStamp: new Date(),
+      difference: diff,
+      percentage: pct,
+      previousDayDifference: prevDayDiff,
+      previousDayPercentage: prevDayPct,
+    },
+  });
+
+  await prisma.quoteHistory.create({
+    data: { buy, sell, type: "BNA" },
+  });
+}