feat: add multi-bill-edit page for batch bill status updates

- Add getLocationsByMonth server action with aggregation pipeline to calculate hasAttachment
- Add updateMonth server action for bulk bill status updates with path revalidation
- Create multi-bill-edit page at /home/multi-bill-edit/[year]/[month]
- Implement MultiBillEdit component with toggle functionality for all bills
- Add BillToggleBadge component integration for consistent bill display
- Add "set all as paid/unpaid" toggle button for batch operations
- Implement server-side redirect with success message after save
- Add Suspense boundary with loading skeleton
- Update translations for multi-bill-edit feature (Croatian and English)
- Ensure data freshness with unstable_noStore and revalidatePath

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/[locale]/home/multi-bill-edit/[year]/[month]/BillToggleBadge.tsx

@@ -0,0 +1,24 @@
+import { FC } from "react"
+import { Bill } from "@/app/lib/db-types"
+import { TicketIcon } from "@heroicons/react/24/outline"
+
+export interface BillBadgeProps {
+    locationId: string,
+    bill: Pick<Bill, 'name' | 'paid' | 'hasAttachment' | 'proofOfPayment'>,
+    onClick?: () => void
+};
+
+export const BillToggleBadge:FC<BillBadgeProps> = ({ bill: { name, paid, hasAttachment, proofOfPayment }, onClick}) => {
+
+    const className = `badge badge-lg ${paid?"badge-success":" badge-outline"} ${ !paid && hasAttachment ? "btn-outline btn-success" : "" }  cursor-pointer`;
+
+    return (
+        <div className={className} onClick={onClick}>
+            {name}
+            {
+                proofOfPayment?.uploadedAt ? 
+                <TicketIcon className="h-[1em] w-[1em]  inline-block ml-1" /> : null
+            }
+        </div>
+    );
+}

app/[locale]/home/multi-bill-edit/[year]/[month]/MultiBillEdit.tsx

@@ -0,0 +1,162 @@
+'use client';
+
+import { FC, useState } from "react";
+import { BillingLocation, YearMonth } from "../../../../../lib/db-types";
+import { formatYearMonth } from "../../../../../lib/format";
+import { useTranslations } from "next-intl";
+import { useRouter } from "next/navigation";
+import { updateMonth } from "../../../../../lib/actions/monthActions";
+import { toast, ToastContainer } from 'react-toastify';
+import 'react-toastify/dist/ReactToastify.css';
+import { BillToggleBadge } from "./BillToggleBadge";
+
+export interface MultiBillEditProps {
+    locations: BillingLocation[];
+    year: number;
+    month: number;
+}
+
+interface BillState {
+    locationId: string;
+    billId: string;
+    paid: boolean;
+}
+
+export const MultiBillEdit: FC<MultiBillEditProps> = ({ locations, year, month }) => {
+    const t = useTranslations("multi-bill-edit");
+    const router = useRouter();
+
+    // Initialize bill states from locations
+    const initialBillStates: BillState[] = locations.flatMap(location =>
+        location.bills.map(bill => ({
+            locationId: location._id,
+            billId: bill._id,
+            paid: bill.paid,
+        }))
+    );
+
+    const [billStates, setBillStates] = useState<BillState[]>(initialBillStates);
+    const [isSaving, setIsSaving] = useState(false);
+    const [allPaidMode, setAllPaidMode] = useState(false);
+
+    // Toggle individual bill paid status
+    const handleBillToggle = (locationId: string, billId: string) => {
+        setBillStates(prevStates =>
+            prevStates.map(state =>
+                state.locationId === locationId && state.billId === billId
+                    ? { ...state, paid: !state.paid }
+                    : state
+            )
+        );
+    };
+
+    // Toggle all bills paid status
+    const handleSetAllAsPayed = () => {
+        const newPaidState = !allPaidMode;
+        setAllPaidMode(newPaidState);
+        setBillStates(prevStates =>
+            prevStates.map(state => ({ ...state, paid: newPaidState }))
+        );
+    };
+
+    // Save changes to database
+    const handleSave = async () => {
+        setIsSaving(true);
+        try {
+            const updates = billStates.map(state => ({
+                locationId: state.locationId,
+                billId: state.billId,
+                paid: state.paid,
+            }));
+
+            await updateMonth({ year, month }, updates);
+
+        } catch (error) {
+            console.error('Error saving bill updates:', error);
+            toast.error(t("save-error-message"), { theme: "dark" });
+            setIsSaving(false);
+        }
+    };
+
+    // Cancel and return to home page
+    const handleCancel = () => {
+        router.push(`/home?year=${year}`);
+    };
+
+    // Get bill state for a specific bill
+    const getBillState = (locationId: string, billId: string): boolean => {
+        const state = billStates.find(
+            s => s.locationId === locationId && s.billId === billId
+        );
+        return state?.paid ?? false;
+    };
+
+    const yearMonth: YearMonth = { year, month };
+
+    return (
+        <div className={`collapse bg-base-200 my-1 sm:min-w-[25em] border-2 border-neutral`}>
+            <h1 className="text-xl font-medium text-white collapse-title ml-1">{formatYearMonth(yearMonth)}</h1>
+            <div className="absolute cursor-pointer top-4 right-[20px]">
+                <BillToggleBadge locationId={"dummy"}
+                    bill={{ paid:allPaidMode, name: allPaidMode ? t("set-all-as-unpaid-button") : t("set-all-as-paid-button"), hasAttachment: false, proofOfPayment: undefined }}
+                    onClick={handleSetAllAsPayed}
+                    />
+            </div>
+            <div className="p-[16px] pt-0">
+                {locations.map(location => (
+                    <div key={location._id} className="card card-compact card-bordered max-w-[30em] bg-base-100 border-1 border-neutral mb-2">
+                        <div className="card-body">
+                            <h2 className="card-title text-[1rem]">
+                                {formatYearMonth(yearMonth)} {location.name}
+                            </h2>
+                            <div className="space-y-4 mt-[-.5rem]">
+                                {location.bills.length > 0 ? (
+                                    <div className="flex flex-wrap gap-2 mt-2">
+                                        {location.bills.map(bill => {
+                                            const isPaid = getBillState(location._id, bill._id);
+                                            return (
+                                                <BillToggleBadge
+                                                    key={bill._id}
+                                                    locationId={location._id}
+                                                    bill={{ ...bill, paid: isPaid }}
+                                                    onClick={() => handleBillToggle(location._id, bill._id)}
+                                                />
+                                            );
+                                        })}
+                                    </div>
+                                ) : (
+                                    <p className="text-sm text-gray-500">{t("no-bills-message")}</p>
+                                )}
+                            </div>
+                        </div>
+                    </div>
+                ))}
+                {/* Action buttons */}
+                <div className="pt-4">
+                    <button
+                        onClick={handleSave}
+                        className="btn btn-primary ml-3"
+                        disabled={isSaving}
+                    >
+                        {isSaving ? (
+                            <>
+                                <span className="loading loading-spinner loading-sm"></span>
+                                {t("saving-button")}
+                            </>
+                        ) : (
+                            t("save-button")
+                        )}
+                    </button>
+                    <button
+                        onClick={handleCancel}
+                        className="btn btn-neutral ml-3"
+                        disabled={isSaving}
+                    >
+                        {t("cancel-button")}
+                    </button>
+                </div>
+            </div>
+            <ToastContainer />
+        </div>
+    );
+};

app/[locale]/home/multi-bill-edit/[year]/[month]/MultiBillEditButton.tsx

@@ -0,0 +1,26 @@
+"use client";
+
+import { InboxStackIcon, Square3Stack3DIcon } from '@heroicons/react/24/outline';
+import { useTranslations } from 'next-intl';
+import { YearMonth } from '../../../../../lib/db-types';
+import Link from 'next/link';
+
+export interface MultiBillEditButtonProps {
+  yearMonth: YearMonth;
+}
+
+export const MultiBillEditButton: React.FC<MultiBillEditButtonProps> = ({ yearMonth }) => {
+  
+  const t = useTranslations("home-page.multi-bill-edit-button");
+
+  return (
+    <div className="card card-compact card-bordered bg-base-100 shadow-s my-1">
+      <Link href={`/home/multi-bill-edit/${yearMonth.year}/${yearMonth.month}`} className="card-body tooltip self-center" data-tip={t("tooltip")} data-umami-event="add-new-location">
+        <span className='flex self-center'>
+          <Square3Stack3DIcon className="h-[1em] w-[1em] cursor-pointer text-4xl" />
+          <span className="ml-1 self-center text-xs text-left leading-[1.2em] w-[5.5em]">{t("tooltip")}</span>
+        </span>
+      </Link>
+    </div>
+  );
+};

app/[locale]/home/multi-bill-edit/[year]/[month]/MultiBillEditPage.tsx

@@ -0,0 +1,16 @@
+import { notFound } from 'next/navigation';
+import { MultiBillEdit } from '@/app/[locale]/home/multi-bill-edit/[year]/[month]/MultiBillEdit';
+import { getLocationsByMonth } from '@/app/lib/actions/monthActions';
+
+export default async function MultiBillEditPage({ year, month }: { year: number; month: number }) {
+
+    const locations = await getLocationsByMonth({ year, month });
+
+    if (!locations || locations.length === 0) {
+        return(notFound());
+    }
+
+    const result = <MultiBillEdit locations={locations} year={year} month={month} />;
+
+    return (result);
+}

app/[locale]/home/multi-bill-edit/[year]/[month]/not-found.tsx

@@ -0,0 +1,6 @@
+import { NotFoundPage } from '@/app/ui/NotFoundPage';
+ 
+const MultiBillEditNotFound = () =>
+<NotFoundPage title="404 Month Not Found" description="Could not find the requested month." />;
+
+export default MultiBillEditNotFound;

app/[locale]/home/multi-bill-edit/[year]/[month]/page.tsx

@@ -0,0 +1,21 @@
+import { Suspense } from 'react';
+import MultiBillEditPage from './MultiBillEditPage';
+import { Main } from '@/app/ui/Main';
+
+const MultiBillEditSkeleton = () => (
+    <div className="flex min-h-screen flex-col items-center justify-center p-6 bg-base-300">
+        <span className="loading loading-spinner loading-lg"></span>
+        <p className="mt-4">Loading...</p>
+    </div>
+);
+
+export default async function Page({ params }: { params: { year: string; month: string } }) {
+
+    return (
+        <Main>
+            <Suspense fallback={<MultiBillEditSkeleton />}>
+                <MultiBillEditPage year={parseInt(params.year)} month={parseInt(params.month)} />
+            </Suspense>
+        </Main>
+    );
+}

app/lib/actions/monthActions.ts

@@ -5,7 +5,9 @@ import { ObjectId } from 'mongodb';
 import { Bill, BillingLocation, YearMonth } from '../db-types';
 import { AuthenticatedUser } from '../types/next-auth';
 import { withUser } from '../auth';
-import { unstable_noStore as noStore } from 'next/cache';
+import { unstable_noStore as noStore, unstable_noStore, revalidatePath } from 'next/cache';
+import { getLocale } from 'next-intl/server';
+import { gotoHomeWithMessage } from './navigationActions';
 
 /**
  * Server-side action which adds a new month to the database
@@ -82,3 +84,137 @@ export const fetchAvailableYears = withUser(async (user:AuthenticatedUser) => {
 
     return(sortedYears);
 })
+
+/**
+ * Fetches all locations for a specific month for the authenticated user
+ * Only projects essential fields needed for the multi-bill-edit page
+ * @param yearMonth - The year and month to fetch
+ * @returns Array of locations with minimal bill data
+ */
+export const getLocationsByMonth = withUser(async (user: AuthenticatedUser, yearMonth: YearMonth) => {
+    
+    unstable_noStore();
+
+    const { id: userId } = user;
+    const dbClient = await getDbClient();
+
+    // Use aggregation pipeline to calculate hasAttachment field
+    const locations = await dbClient.collection<BillingLocation>("lokacije")
+        .aggregate([
+            {
+                $match: {
+                    userId,
+                    yearMonth: {
+                        year: yearMonth.year,
+                        month: yearMonth.month,
+                    }
+                }
+            },
+            {
+                $addFields: {
+                    _id: { $toString: "$_id" },
+                    bills: {
+                        $map: {
+                            input: "$bills",
+                            as: "bill",
+                            in: {
+                                _id: { $toString: "$$bill._id" },
+                                name: "$$bill.name",
+                                paid: "$$bill.paid",
+                                hasAttachment: { $ne: ["$$bill.attachment", null] },
+                                proofOfPayment: "$$bill.proofOfPayment",
+                            },
+                        },
+                    }
+                }
+            },
+            {
+                $project: {
+                    "_id": 1,
+                    "name": 1,
+                    "yearMonth.year": 1,
+                    "yearMonth.month": 1,
+                    "bills._id": 1,
+                    "bills.name": 1,
+                    "bills.paid": 1,
+                    "bills.hasAttachment": 1,
+                    "bills.proofOfPayment.uploadedAt": 1,
+                }
+            },
+            {
+                $sort: {
+                    name: 1,
+                },
+            },
+        ])
+        .toArray();
+
+    return locations as Array<BillingLocation>;
+});
+
+/**
+ * Updates the paid status of bills for locations in a specific month
+ * @param yearMonth - The year and month to update
+ * @param updates - Array of updates with locationId, billId, and paid status
+ * @returns Success status
+ */
+export const updateMonth = withUser(async (
+    user: AuthenticatedUser,
+    yearMonth: YearMonth,
+    updates: Array<{ locationId: string; billId: string; paid: boolean }>
+) => {
+    unstable_noStore();
+
+    const { id: userId } = user;
+    const dbClient = await getDbClient();
+
+    // Group updates by location to minimize database operations
+    const updatesByLocation = updates.reduce((acc, update) => {
+        if (!acc[update.locationId]) {
+            acc[update.locationId] = [];
+        }
+        acc[update.locationId].push(update);
+        return acc;
+    }, {} as Record<string, typeof updates>);
+
+    // Perform bulk updates
+    const updatePromises = Object.entries(updatesByLocation).map(
+        async ([locationId, locationUpdates]) => {
+            // For each bill update in this location
+            const billUpdatePromises = locationUpdates.map(({ billId, paid }) =>
+                dbClient.collection<BillingLocation>("lokacije").updateOne(
+                    {
+                        _id: locationId,
+                        userId, // Ensure the location belongs to the authenticated user
+                        yearMonth: {
+                            year: yearMonth.year,
+                            month: yearMonth.month,
+                        },
+                        'bills._id': billId,
+                    },
+                    {
+                        $set: {
+                            'bills.$.paid': paid,
+                        },
+                    }
+                )
+            );
+
+            return Promise.all(billUpdatePromises);
+        }
+    );
+
+    await Promise.all(updatePromises);
+
+    // Revalidate the home page and multi-edit page to show fresh data
+    revalidatePath('/home');
+    revalidatePath(`/home/multi-bill-edit/${yearMonth.year}/${yearMonth.month}`);
+
+    // Redirect to home page with year and month parameters, including success message
+    if (yearMonth) {
+        const locale = await getLocale();
+        await gotoHomeWithMessage(locale, 'bill-multi-edit-saved', yearMonth);
+    }
+
+    return { success: true };
+});

app/ui/MonthLocationList.tsx

@@ -12,6 +12,7 @@ import { useRouter, useSearchParams } from "next/navigation";
 import { ToastContainer, toast } from 'react-toastify';
 import 'react-toastify/dist/ReactToastify.css';
 import { useTranslations } from "next-intl";
+import { MultiBillEditButton } from "../[locale]/home/multi-bill-edit/[year]/[month]/MultiBillEditButton";
 
 const getNextYearMonth = (yearMonth:YearMonth) => {
     const {year, month} = yearMonth;
@@ -84,6 +85,12 @@ export const MonthLocationList:React.FC<MonthLocationListProps  > = ({
             params.delete('locationDeleted');
             messageShown = true;
         }
+
+        if (search.get('bill-multi-edit-saved') === 'true') {
+            toast.success(t("bill-multi-edit-save-success-message"), { theme: "dark" });
+            params.delete('bill-multi-edit-saved');
+            messageShown = true;
+        }
     }, [search, router, t]);
 
     if(!availableYears || !months) {
@@ -128,6 +135,7 @@ export const MonthLocationList:React.FC<MonthLocationListProps  > = ({
                         <div className="flex gap-2 justify-center">
                         <AddLocationButton yearMonth={yearMonth} />
                         <PrintButton yearMonth={yearMonth} />
+                        <MultiBillEditButton yearMonth={yearMonth} />
                         </div>
                     </MonthCard>
                 )