feat(belo): add analysis page with historical stats, chart, and date range picker

apps/backend/src/modules/quotes/handlers/getHistoricalMinMax.ts

@@ -0,0 +1,37 @@
+import type { Context } from "hono";
+import { prisma } from "../../../lib/prisma";
+import { cache } from "../../../lib/cache";
+
+const VALID_TYPES = ["BLUE", "BNA", "BELO"] as const;
+
+export async function getHistoricalMinMax(c: Context) {
+  const rawType = c.req.param("type")!.toUpperCase();
+
+  if (!VALID_TYPES.includes(rawType as typeof VALID_TYPES[number])) {
+    return c.json({ error: `Invalid quote type. Must be one of: ${VALID_TYPES.join(", ")}` }, 400);
+  }
+
+  const cacheKey = `quotes:historical:minmax:${rawType}`;
+  const cached = cache.get(cacheKey);
+  if (cached) return c.json(cached);
+
+  const type = rawType as string;
+
+  const rows = await prisma.$queryRaw<Array<{
+    minBuy: number;
+    maxBuy: number;
+    minBuyDate: string;
+    maxBuyDate: string;
+  }>>`
+    SELECT
+      (SELECT MIN(buy::numeric)::float8 FROM "quotes_history" WHERE "type" = ${type}::"QuoteType") AS "minBuy",
+      (SELECT MAX(buy::numeric)::float8 FROM "quotes_history" WHERE "type" = ${type}::"QuoteType") AS "maxBuy",
+      (SELECT "timeStamp"::text FROM "quotes_history" WHERE "type" = ${type}::"QuoteType" ORDER BY buy::numeric ASC LIMIT 1) AS "minBuyDate",
+      (SELECT "timeStamp"::text FROM "quotes_history" WHERE "type" = ${type}::"QuoteType" ORDER BY buy::numeric DESC LIMIT 1) AS "maxBuyDate"
+  `;
+
+  const result = rows[0] ?? { minBuy: 0, maxBuy: 0, minBuyDate: null, maxBuyDate: null };
+
+  cache.set(cacheKey, result);
+  return c.json(result);
+}