better-auth/dev/expo-app/lib/storage.ts

import AsyncStorage from "@react-native-async-storage/async-storage";

const HABIT_KEY = "habits";

export type Habit = {
	id: string;
	name: string;
	description: string;
	duration: number;
	category: string;
	enableNotifications: boolean;
};

export async function getHabits(): Promise<Habit[]> {
	const habitsString = await AsyncStorage.getItem(HABIT_KEY);
	if (!habitsString) {
		return [];
	}
	return JSON.parse(habitsString) as Habit[];
}

export async function setHabits(habits: Habit[]): Promise<void> {
	await AsyncStorage.setItem(HABIT_KEY, JSON.stringify(habits));
}

export async function deleteHabit(id: string): Promise<void> {
	const habits = await getHabits();
	const updatedHabits = habits.filter((habit) => habit.id !== id);
	await setHabits(updatedHabits);
}