rolling and calender toggle

src/Dashboard.tsx

@@ -36,8 +36,8 @@ export default function Dashboard() {
     income: null
   });
 
-  const [mode, setMode] =
-    React.useState<"expense" | "income">("expense");
+  const [mode, setMode] = React.useState<"expense" | "income">("expense");
+  const [period, setPeriod] = React.useState<"rolling" | "calendar">("rolling");
 
   const [loading, setLoading] = React.useState(true);
   const [error, setError] = React.useState<string | null>(null);
@@ -56,8 +56,8 @@ export default function Dashboard() {
         ] = await Promise.all([
           fetchLatestTransactions("expense"),
           fetchLatestTransactions("income"),
-          fetchAggregatedExpenses(),
-          fetchAggregatedIncome()
+          fetchAggregatedExpenses(period),
+          fetchAggregatedIncome(period)
         ]);
 
         setLatest({
@@ -79,7 +79,7 @@ export default function Dashboard() {
     }
 
     loadData();
-  }, []);
+  }, [period]);
 
   const currentData = aggregated[mode];
   const currentLatest = latest[mode];
@@ -132,6 +132,8 @@ export default function Dashboard() {
             summary="Interactive chronological tracking"
             tabs={["Daily", "Weekly", "Monthly"]}
             data={currentData?.chartData || {}}
+            period={period}
+            onPeriodChange={setPeriod}
           />
         </Grid>
       </Grid>

src/components/HistoryChart.tsx

@@ -13,6 +13,8 @@ export interface HistoryChartProps {
   summary?: string;
   tabs: string[];
   data: Record<string, ChartDataPoint[]>;
+  period: "rolling" | "calendar",
+  onPeriodChange: (mode: "rolling" | "calendar") => void;
 }
 
 export default function HistoryChart({
@@ -20,6 +22,8 @@ export default function HistoryChart({
   summary,
   tabs,
   data,
+  period,
+  onPeriodChange,
 }: HistoryChartProps) {
   const [activeTab, setActiveTab] = React.useState<string>(tabs[0] || "");
 
@@ -102,6 +106,22 @@ export default function HistoryChart({
         ))}
       </ToggleButtonGroup>
 
+      <ToggleButtonGroup
+        value={period}
+        exclusive
+        onChange={(_, v) => v && onPeriodChange(v)}
+        size="small"
+        sx={{ mb: 2 }}
+      >
+        <ToggleButton value="rolling">Rolling</ToggleButton>
+        <ToggleButton
+          value="calendar"
+          disabled={activeTab.toLowerCase() === "daily"}
+        >
+          Calendar
+        </ToggleButton>
+      </ToggleButtonGroup>
+
       {/* Chart Area */}
       {currentData.length > 0 ? (
         <Box sx={{ display: "flex", alignItems: "flex-end", height: 200, mt: 4, position: 'relative' }}>

src/utils/dashboardLoader.ts

@@ -80,7 +80,8 @@ export interface AggregatedDashboardData {
 // ---------------- AGGREGATION ----------------
 // ---------------- AGGREGATION ----------------
 export async function fetchAggregatedData(
-  type: "expense" | "income"
+  type: "expense" | "income",
+  mode: "rolling" | "calendar" = "rolling"
 ): Promise<AggregatedDashboardData> {
   const res = await api.get("/expenses", { params: { limit: 0 } });
   const all: any[] = res.data?.items || res.data || [];
@@ -105,56 +106,76 @@ export async function fetchAggregatedData(
   const weekEnd = endOfDay(new Date(weekStart.getTime() + 6 * 86400000));
 
   // ---------------- MONTH (rolling 5 weeks, Mon–Sun aligned) ----------------
-  const weeklyBuckets: {
-    label: string;
-    start: Date;
-    end: Date;
-    amount: number;
-  }[] = [];
+  const weeklyBuckets = [];
 
-  const currentWeekStart = getStartOfWeek(now);
+  if (mode === "rolling") {
+    const currentWeekStart = getStartOfWeek(now);
 
-  for (let i = 0; i < 5; i++) {
-    const start = new Date(currentWeekStart.getTime() - i * 7 * 86400000);
-    const end = endOfDay(new Date(start.getTime() + 6 * 86400000));
+    for (let i = 0; i < 5; i++) {
+      const start = new Date(currentWeekStart.getTime() - i * 7 * 86400000);
+      const end = endOfDay(new Date(start.getTime() + 6 * 86400000));
 
-    weeklyBuckets.push({
-      label: `${format(start)} - ${format(end)}`,
-      start,
-      end,
-      amount: 0
-    });
+      weeklyBuckets.push({
+        label: `${format(start)} - ${format(end)}`,
+        start,
+        end,
+        amount: 0
+      });
+    }
+  } else {
+    // calendar weeks within current month
+    const startOfMonth = new Date(now.getFullYear(), now.getMonth(), 1);
+    let cursor = getStartOfWeek(startOfMonth);
+
+    while (cursor <= now) {
+      const start = new Date(cursor);
+      const end = endOfDay(new Date(start.getTime() + 6 * 86400000));
+
+      weeklyBuckets.push({
+        label: `${format(start)} - ${format(end)}`,
+        start,
+        end,
+        amount: 0
+      });
+
+      cursor = new Date(cursor.getTime() + 7 * 86400000);
+    }
   }
 
   // ---------------- YEAR (rolling 12 months) ----------------
-  const monthlyBuckets: {
-    label: string;
-    start: Date;
-    end: Date;
-    amount: number;
-  }[] = [];
+  const monthlyBuckets = [];
 
-  for (let i = 0; i < 12; i++) {
-    const d = new Date(now);
-    d.setMonth(d.getMonth() - i);
+  if (mode === "rolling") {
+    for (let i = 0; i < 12; i++) {
+      const d = new Date(now);
+      d.setMonth(d.getMonth() - i);
 
-    const start = new Date(d.getFullYear(), d.getMonth(), 1);
+      const start = new Date(d.getFullYear(), d.getMonth(), 1);
 
-    const end =
-      i === 0
-        ? endOfDay(now) // current month → till now
-        : endOfDay(new Date(d.getFullYear(), d.getMonth() + 1, 0));
+      const end =
+        i === 0
+          ? endOfDay(now) // current month → till now
+          : endOfDay(new Date(d.getFullYear(), d.getMonth() + 1, 0));
+      monthlyBuckets.push({
+        label: `${d.toLocaleString("default", { month: "short" })}-${String(d.getFullYear()).slice(2)}`,
+        start,
+        end,
+        amount: 0
+      });
+    }
+  } else {
+    // calendar year (Jan → current month)
+    for (let i = 0; i <= now.getMonth(); i++) {
+      const start = new Date(now.getFullYear(), i, 1);
+      const end = endOfDay(new Date(now.getFullYear(), i + 1, 0));
 
-    const label = `${d.toLocaleString("default", {
-      month: "short"
-    })}-${String(d.getFullYear()).slice(2)}`;
-
-    monthlyBuckets.push({
-      label,
-      start,
-      end,
-      amount: 0
-    });
+      monthlyBuckets.push({
+        label: `${start.toLocaleString("default", { month: "short" })}-${String(start.getFullYear()).slice(2)}`,
+        start,
+        end,
+        amount: 0
+      });
+    }
   }
 
   // ---------------- LOOP ----------------
@@ -231,8 +252,12 @@ export async function fetchAggregatedData(
 }
 
 // ---------------- EXPORTS ----------------
-export const fetchAggregatedExpenses = () =>
-  fetchAggregatedData("expense");
+export const fetchAggregatedExpenses = (
+  mode: "rolling" | "calendar"
+) =>
+  fetchAggregatedData("expense", mode);
 
-export const fetchAggregatedIncome = () =>
-  fetchAggregatedData("income");
+export const fetchAggregatedIncome =  (
+  mode: "rolling" | "calendar"
+) =>
+  fetchAggregatedData("income", mode);