feat(materials per day): more work on materials per day

lstV2/server/services/notifications/controller/materialsPerDay/materialPurchases.ts

@@ -0,0 +1,38 @@
+import { formatISO, parseISO, startOfWeek } from "date-fns";
+
+function toDate(val: any) {
+	if (val instanceof Date) return val;
+	if (typeof val === "string") return parseISO(val.replace(" ", "T"));
+	return new Date(val);
+}
+
+export const materialPurchases = async (data: any) => {
+	/** @type {Record<string, Record<string, number>>} */
+	const grouped: any = {};
+
+	for (const r of data) {
+		const mat = String(r.MaterialHumanReadableId);
+		const d = toDate(r.CalDate);
+		const week = formatISO(startOfWeek(d, { weekStartsOn: 1 }), {
+			representation: "date",
+		});
+
+		grouped[mat] ??= {};
+		grouped[mat][week] ??= 0;
+		grouped[mat][week] += Number(r.DailyMaterialDemand) || 0;
+	}
+
+	const result = [];
+	for (const [mat, weeks] of Object.entries(grouped)) {
+		// @ts-ignore
+		for (const [week, total] of Object.entries(weeks)) {
+			result.push({
+				MaterialHumanReadableId: mat,
+				WeekStart: week,
+				WeeklyDemand: Number(total).toFixed(2),
+			});
+		}
+	}
+
+	return result;
+};