Added settings, enabled calendar

lib/types.ts

@@ -33,3 +33,50 @@ export interface CoinsData {
   balance: number;
   transactions: CoinTransaction[];
 }
+
+// Default value functions
+// Data container types
+export interface WishlistData {
+  items: WishlistItemType[];
+}
+
+// Default value functions
+export const getDefaultHabitsData = (): HabitsData => ({
+  habits: []
+});
+
+export const getDefaultCoinsData = (): CoinsData => ({
+  balance: 0,
+  transactions: []
+});
+
+export const getDefaultWishlistData = (): WishlistData => ({
+  items: []
+});
+
+export const getDefaultSettings = (): Settings => ({
+  ui: {
+    useNumberFormatting: true,
+    useGrouping: true,
+  }
+});
+
+// Map of data types to their default values
+export const DATA_DEFAULTS = {
+  wishlist: getDefaultWishlistData,
+  habits: getDefaultHabitsData,
+  coins: getDefaultCoinsData,
+  settings: getDefaultSettings,
+} as const;
+
+// Type for all possible data types
+export type DataType = keyof typeof DATA_DEFAULTS;
+
+export interface UISettings {
+  useNumberFormatting: boolean;
+  useGrouping: boolean;
+}
+
+export interface Settings {
+  ui: UISettings;
+}

lib/utils/formatNumber.ts

@@ -0,0 +1,37 @@
+import { Settings } from "../types";
+
+function formatWithLocale(amount: number, useGrouping: boolean, maximumFractionDigits?: number): string {
+  return amount.toLocaleString(undefined, {
+    maximumFractionDigits,
+    useGrouping,
+  });
+}
+
+export function formatNumber({ amount, settings }: { amount: number, settings: Settings }): string {
+  const useFormatting = settings?.ui.useNumberFormatting ?? true;
+  const useGrouping = settings?.ui.useGrouping ?? true;
+
+  if (!useFormatting) {
+    return useGrouping ? formatWithLocale(amount, true) : amount.toString();
+  }
+
+  const absNum = Math.abs(amount);
+
+  if (absNum >= 1e12) {
+    return amount.toExponential(2);
+  }
+
+  if (absNum >= 1e9) {
+    return formatWithLocale(amount / 1e9, useGrouping, 1) + 'B';
+  }
+
+  if (absNum >= 1e6) {
+    return formatWithLocale(amount / 1e6, useGrouping, 1) + 'M';
+  }
+
+  if (absNum >= 1e3) {
+    return formatWithLocale(amount / 1e3, useGrouping, 1) + 'K';
+  }
+
+  return formatWithLocale(amount, useGrouping);
+}