ui changes and cs prices

src/routes/projects/cs-prices/api/series/+server.ts

@@ -0,0 +1,68 @@
+import { db } from '$lib/server/db';
+import { sql } from 'drizzle-orm';
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+
+const maxSeries = 1000;
+const maxDays = 365 * 20;
+
+export const POST: RequestHandler = async ({ request }) => {
+	const body = (await request.json().catch(() => ({}))) as Record<string, unknown>;
+	const dimension = typeof body.dimension === 'string' ? body.dimension : 'item';
+	const kind = typeof body.kind === 'string' ? body.kind : 'sale-median';
+	const source = typeof body.source === 'string' ? body.source : 'steam-market';
+	const currency = typeof body.currency === 'string' ? body.currency : 'USD';
+	const ids = Array.isArray(body.ids) ? body.ids : [];
+	const values = Array.isArray(body.values) ? body.values : [];
+	if (
+		!/^[a-z][a-z0-9_]*$/.test(dimension) ||
+		!/^[a-z0-9][a-z0-9-]{0,79}$/.test(source) ||
+		!/^[a-z0-9][a-z0-9-]{0,79}$/.test(kind) ||
+		!/^[A-Z]{3}$/.test(currency) ||
+		ids.length > maxSeries ||
+		values.length > maxSeries ||
+		ids.some((id) => !Number.isSafeInteger(id) || id <= 0) ||
+		values.some((value) => typeof value !== 'string' || value.length > 200)
+	)
+		return json({ error: 'Invalid selection' }, { status: 400 });
+	if (dimension === 'item' ? !ids.length : !values.length)
+		return json({ series: [], bucketSeconds: 0 });
+	const to = new Date(typeof body.to === 'string' ? body.to : Date.now());
+	const from = new Date(typeof body.from === 'string' ? body.from : to.getTime() - 365 * 86400_000);
+	if (Number.isNaN(+from) || Number.isNaN(+to) || from >= to || +to - +from > maxDays * 86400_000)
+		return json({ error: 'Invalid date range' }, { status: 400 });
+	// Aim for at most 240 buckets per series. Raw observations remain untouched.
+	const seconds = Math.max(60, Math.ceil((+to - +from) / 1000 / 240 / 60) * 60);
+	const selection =
+		dimension === 'item'
+			? sql`JOIN cs_market_items i ON i.id = p.item_id AND i.id IN (${sql.join(
+					ids.map((id) => sql`${id}`),
+					sql`,`
+				)})`
+			: sql`JOIN cs_item_dimensions d ON d.item_id = p.item_id AND d.key = ${dimension}
+			AND d.value IN (${sql.join(
+				values.map((value) => sql`${value}`),
+				sql`,`
+			)})`;
+	const seriesKey = dimension === 'item' ? sql`i.id::text` : sql`d.value`;
+	const rows = await db.execute(sql`
+		WITH per_item AS (
+			SELECT ${seriesKey} AS series_key, p.item_id,
+				date_bin(make_interval(secs => ${seconds}), p.observed_at,
+					TIMESTAMPTZ '1970-01-01') AS bucket,
+				avg(p.price_cents) AS price_cents,
+				sum(p.volume) AS volume,
+				min(p.price_cents) AS min_cents,
+				max(p.price_cents) AS max_cents
+			FROM cs_price_observations p ${selection}
+			WHERE p.source = ${source} AND p.currency = ${currency} AND p.kind = ${kind}
+				AND p.observed_at >= ${from.toISOString()}::timestamptz
+				AND p.observed_at <= ${to.toISOString()}::timestamptz
+			GROUP BY 1, 2, 3
+		)
+		SELECT series_key, bucket, round(avg(price_cents))::int AS price_cents,
+			count(*)::int AS items, sum(volume)::bigint AS volume,
+			min(min_cents)::int AS min_cents, max(max_cents)::int AS max_cents
+		FROM per_item GROUP BY 1, 2 ORDER BY 1, 2`);
+	return json({ bucketSeconds: seconds, currency, source, kind, points: rows });
+};