feat: count employee by gender

src/controllers/employee-controller.ts

@@ -209,6 +209,22 @@ export class EmployeeController extends Controller {
     });
   }
 
+  @Get("stats/gender")
+  async getEmployeeStatsGender(@Query() customerBranchId?: string) {
+    return await prisma.employee
+      .groupBy({
+        _count: true,
+        by: ["gender"],
+        where: { customerBranchId },
+      })
+      .then((res) =>
+        res.reduce<Record<string, number>>((a, c) => {
+          a[c.gender] = c._count;
+          return a;
+        }, {}),
+      );
+  }
+
   @Get()
   async list(
     @Query() zipCode?: string,