refactored HistoryChart to component

src/components/HistoryChart/HistoryChart.utils.ts

@@ -0,0 +1,43 @@
+import { ChartDataPoint } from "./HistoryChart.models";
+
+export const formatDisplay = (
+  point: ChartDataPoint,
+  tab: string,
+  comparison: boolean
+) => {
+  const base = point.amount;
+  const cmp = point.compare?.amount ?? 0;
+
+  const formatShort = (val: number) => {
+    if (tab === "monthly" && val >= 100000) {
+      return `${(val / 100000).toFixed(2)}L`;
+    }
+    if (tab === "weekly" && val >= 1000) {
+      return `${(val / 1000).toFixed(1)}K`;
+    }
+    return val.toLocaleString("en-IN");
+  };
+
+  if (!comparison) return `₹ ${formatShort(base)}`;
+
+  const diff = base - cmp;
+  const sign = diff >= 0 ? "+" : "-";
+
+  return `₹ ${formatShort(base)} (${sign}${formatShort(Math.abs(diff))})`;
+};
+
+export const formatLabel = (label: string, type: string) => {
+  if (type === "monthly") return label;
+
+  if (type === "weekly") {
+    const parts = label.split(" - ");
+    if (parts.length === 2) {
+      const [start, end] = parts;
+      const startDay = start.split(" ")[0];
+      const [endDay, month] = end.split(" ");
+      return `${startDay}–${endDay} ${month}`;
+    }
+  }
+
+  return label;
+};