feat: add payment stats by month

src/controllers/00-stats-controller.ts

@@ -13,6 +13,7 @@ import { createPermCondition } from "../services/permission";
 import { RequestWithUser } from "../interfaces/user";
 import { PaymentStatus } from "../generated/kysely/types";
 import { precisionRound } from "../utils/arithmetic";
+import dayjs from "dayjs";
 
 const permissionCondCompany = createPermCondition((_) => true);
 
@@ -411,4 +412,56 @@ export class StatsController extends Controller {
       { income: 0, expenses: 0, netProfit: 0 },
     );
   }
+
+  @Get("payment")
+  async invoice(
+    @Request() req: RequestWithUser,
+    @Query() startDate?: Date,
+    @Query() endDate?: Date,
+  ) {
+    if (!startDate && !endDate) {
+      startDate = dayjs(new Date()).subtract(12, "months").startOf("month").toDate();
+      endDate = dayjs(new Date()).endOf("months").toDate();
+    }
+
+    if (!startDate && endDate) {
+      startDate = dayjs(endDate).subtract(12, "months").startOf("month").toDate();
+    }
+
+    if (startDate && !endDate) {
+      endDate = dayjs(new Date()).endOf("month").toDate();
+    }
+
+    const data = await prisma.$transaction(async (tx) => {
+      const months: Date[] = [];
+
+      while (startDate! < endDate!) {
+        months.push(startDate!);
+        startDate = dayjs(startDate).startOf("month").add(1, "month").toDate();
+      }
+
+      return await Promise.all(
+        months.map(async (v) => {
+          const date = dayjs(v);
+          return {
+            month: date.format("MM"),
+            year: date.format("YYYY"),
+            data: await tx.payment
+              .groupBy({
+                _sum: { amount: true },
+                where: { createdAt: { gte: v, lte: date.endOf("month").toDate() } },
+                by: "paymentStatus",
+              })
+              .then((v) =>
+                v.reduce<Partial<Record<(typeof v)[number]["paymentStatus"], number>>>((a, c) => {
+                  a[c.paymentStatus] = c._sum.amount || 0;
+                  return a;
+                }, {}),
+              ),
+          };
+        }),
+      );
+    });
+    return data;
+  }
 }