Adding notes app in React Native

FastNotes/.vscode/extensions.json

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+{ "recommendations": ["expo.vscode-expo-tools"] }

FastNotes/.vscode/settings.json

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+{
+  "editor.codeActionsOnSave": {
+    "source.fixAll": "explicit",
+    "source.organizeImports": "explicit",
+    "source.sortMembers": "explicit"
+  }
+}

FastNotes/README.md

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+# Welcome to your Expo app 👋
+
+This is an [Expo](https://expo.dev) project created with [`create-expo-app`](https://www.npmjs.com/package/create-expo-app).
+
+## Get started
+
+1. Install dependencies
+
+   ```bash
+   npm install
+   ```
+
+2. Start the app
+
+   ```bash
+   npx expo start
+   ```
+
+In the output, you'll find options to open the app in a
+
+- [development build](https://docs.expo.dev/develop/development-builds/introduction/)
+- [Android emulator](https://docs.expo.dev/workflow/android-studio-emulator/)
+- [iOS simulator](https://docs.expo.dev/workflow/ios-simulator/)
+- [Expo Go](https://expo.dev/go), a limited sandbox for trying out app development with Expo
+
+You can start developing by editing the files inside the **app** directory. This project uses [file-based routing](https://docs.expo.dev/router/introduction).
+
+## Get a fresh project
+
+When you're ready, run:
+
+```bash
+npm run reset-project
+```
+
+This command will move the starter code to the **app-example** directory and create a blank **app** directory where you can start developing.
+
+## Learn more
+
+To learn more about developing your project with Expo, look at the following resources:
+
+- [Expo documentation](https://docs.expo.dev/): Learn fundamentals, or go into advanced topics with our [guides](https://docs.expo.dev/guides).
+- [Learn Expo tutorial](https://docs.expo.dev/tutorial/introduction/): Follow a step-by-step tutorial where you'll create a project that runs on Android, iOS, and the web.
+
+## Join the community
+
+Join our community of developers creating universal apps.
+
+- [Expo on GitHub](https://github.com/expo/expo): View our open source platform and contribute.
+- [Discord community](https://chat.expo.dev): Chat with Expo users and ask questions.

FastNotes/app.json

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+{
+  "expo": {
+    "name": "FastNotes",
+    "slug": "FastNotes",
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/images/icon.png",
+    "scheme": "fastnotes",
+    "userInterfaceStyle": "automatic",
+    "newArchEnabled": true,
+    "ios": {
+      "supportsTablet": true
+    },
+    "android": {
+      "adaptiveIcon": {
+        "backgroundColor": "#E6F4FE",
+        "foregroundImage": "./assets/images/android-icon-foreground.png",
+        "backgroundImage": "./assets/images/android-icon-background.png",
+        "monochromeImage": "./assets/images/android-icon-monochrome.png"
+      },
+      "edgeToEdgeEnabled": true,
+      "predictiveBackGestureEnabled": false
+    },
+    "web": {
+      "output": "static",
+      "favicon": "./assets/images/favicon.png"
+    },
+    "plugins": [
+      "expo-router",
+      [
+        "expo-splash-screen",
+        {
+          "image": "./assets/images/splash-icon.png",
+          "imageWidth": 200,
+          "resizeMode": "contain",
+          "backgroundColor": "#ffffff",
+          "dark": {
+            "backgroundColor": "#000000"
+          }
+        }
+      ]
+    ],
+    "experiments": {
+      "typedRoutes": true,
+      "reactCompiler": true
+    }
+  }
+}

FastNotes/app/_layout.tsx

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+import { DarkTheme, DefaultTheme, ThemeProvider } from '@react-navigation/native';
+import { Stack } from 'expo-router';
+import { StatusBar } from 'expo-status-bar';
+import 'react-native-reanimated';
+import { SafeAreaProvider } from 'react-native-safe-area-context';
+import { NotesProvider } from "@/src/notes/NotesContext"
+import { useColorScheme } from '@/hooks/use-color-scheme';
+;
+
+export default function RootLayout() {
+  const colorScheme = useColorScheme();
+
+  /*TODO
+  Sort ThemeProvider to work with dark theme on iOS
+  */
+
+  return (
+    <SafeAreaProvider>
+      <NotesProvider>
+        <ThemeProvider value={colorScheme === 'dark' ? DefaultTheme : DefaultTheme}>
+          <Stack>
+            <Stack.Screen name="index" options={{ title: 'FastNotes' }} />
+            <Stack.Screen name="newNote" options={{ title: 'New Note'}}/>
+            <Stack.Screen name="detail" options={{ title: 'Detail'}}/>
+          </Stack>
+          <StatusBar style="auto" />
+        </ThemeProvider>
+      </NotesProvider>
+    </SafeAreaProvider>
+  );
+}

FastNotes/app/detail.tsx

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+import { StyleSheet, Text, View } from "react-native";
+import { useLocalSearchParams } from "expo-router";
+
+export default function DetailScreen()
+{
+    const { title, content } = useLocalSearchParams<
+    {
+        title?: string;
+        content?: string;
+    }>();
+
+    return(
+        <View style={styles.container}>
+            <Text style={styles.title}>{title ?? "(No title)"}</Text>
+            <Text style={styles.content}>{content ?? ""}</Text>
+        </View>
+    );
+}
+
+
+const styles = StyleSheet.create(
+    {
+        container: { flex: 1, padding: 16, gap: 12 },
+        title: { fontSize: 22, fontWeight:"700" },
+        content: { fontSize: 16 }
+    });

FastNotes/app/index.tsx

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+import { FlatList, Pressable, StyleSheet, Text, View } from "react-native";
+import { router } from "expo-router";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { useNotes } from "@/src/notes/NotesContext";
+
+export default function HomeScreen() 
+{
+  const { notes } = useNotes();
+  const insets = useSafeAreaInsets();
+
+return (
+    <View style={styles.container}>
+      <FlatList
+        data={notes}
+        keyExtractor={(n) => n.id}
+        contentContainerStyle={[styles.list, { paddingBottom: 120 }]}
+        renderItem={({ item }) => (
+          <Pressable
+            style={styles.noteItem}
+            onPress={() =>
+              router.push({
+                pathname: "/detail",
+                params: { title: item.title, content: item.content },
+              })
+            }
+          >
+            <Text style={styles.noteTitle}>{item.title}</Text>
+          </Pressable>
+        )}
+      />
+
+      <Pressable
+        style={[styles.fab, { bottom: insets.bottom + 24, right: insets.right + 40 }]}
+        onPress={() => router.push("/newNote")}
+      >
+        <Text style={styles.fabText}>+</Text>
+      </Pressable>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: { flex: 1 },
+  list: { padding: 16, gap: 12, paddingTop: 20 },
+  noteItem: { padding: 16, borderWidth: 1, borderRadius:12 },
+  noteTitle: { fontSize: 16, fontWeight: "600" },
+  fab: 
+  {
+    position: "absolute",
+    width: 56, height: 56, borderRadius: 28,
+    alignItems: "center", justifyContent: "center",
+    backgroundColor: "grey"
+  },
+  fabText: { fontSize: 28, lineHeight: 28, fontWeight: "700"}
+});

FastNotes/app/newNote.tsx

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+import 
+{ 
+    StyleSheet, Text, View, KeyboardAvoidingView, 
+    Platform, Pressable, TextInput, ScrollView
+} from "react-native";
+import { router, } from "expo-router";
+import { useNotes } from "@/src/notes/NotesContext";
+import { useState, useRef } from "react";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { useHeaderHeight } from "@react-navigation/elements";
+
+
+
+export default function NewNoteScreen() 
+{
+    const { addNote } = useNotes();
+    const[title, setTitle] = useState("");
+    const [content, setContent] = useState("");
+    const insets = useSafeAreaInsets();
+    const headerHeight = useHeaderHeight();
+    const [contentHeight, setContentHeight] = useState(160);
+    const scrollRef = useRef<ScrollView>(null);
+
+    const onSave = () => 
+    {
+        if(!title.trim() && !content.trim()) return;
+        addNote(title, content);
+        router.back();
+    };
+
+    return (
+      <KeyboardAvoidingView style={{ flex: 1}} behavior={Platform.OS === "ios" ? "padding" : undefined}
+      keyboardVerticalOffset={headerHeight}>
+        <View style={styles.container}>
+            <ScrollView ref={scrollRef} contentContainerStyle={{ padding: 16, paddingBottom: 120, gap: 10}}
+            keyboardShouldPersistTaps="handled">
+                <Text style={styles.label}>Title</Text>
+                <TextInput value={title} onChangeText={setTitle}
+                placeholder="Give it a title..." style={styles.input}
+                returnKeyType="next"/>
+
+                <Text style={styles.label}>Content</Text>
+                <TextInput value={content} onChangeText={setContent} placeholder="Write your note..."
+                style={[styles.input, { height: Math.max(160, contentHeight) }]} multiline 
+                textAlignVertical="top"
+                onContentSizeChange={(e) => {setContentHeight(e.nativeEvent.contentSize.height);
+                    scrollRef.current?.scrollToEnd({ animated: true });
+                }}/>
+
+            </ScrollView>
+            <View>
+                <Pressable onPress={onSave}
+                    style={[styles.saveFloating, { bottom: insets.bottom + 16 }]}>
+                    <Text style={styles.saveFloatingText}>Save</Text>
+                </Pressable>
+            </View>
+        </View>
+      </KeyboardAvoidingView>
+    );
+}
+
+const styles = StyleSheet.create(
+    { 
+        container: { flex: 1, gap: 10 },
+        label: { fontSize: 14, fontWeight: "600" },
+        input: 
+        { 
+            borderWidth: 1, borderRadius: 7, 
+            padding: 12, fontSize: 16
+        },
+        saveBtn:
+        {
+            borderRadius: 12,
+            paddingVertical: 14, alignItems: "center",
+            backgroundColor: "grey"
+        },
+        saveText: { color: "white", fontSize: 16, fontWeight: "700"},
+        saveBar: 
+        {
+            position: "absolute",
+            left: 0,
+            right: 0,
+            bottom: 0,
+            paddingTop: 12,
+            paddingHorizontal: 16,
+            backgroundColor: "white",
+            borderTopWidth: 1
+        },
+        saveFloating: 
+        {
+            position: "absolute",
+            left: 16,
+            right: 16,
+            borderRadius: 12,
+            paddingVertical: 14,
+            alignItems: "center",
+            backgroundColor: "#111"
+        },
+        saveFloatingText: 
+        {
+            color: "white",
+            fontSize: 16,
+            fontWeight: "700"
+        }
+    }
+);

FastNotes/components/external-link.tsx

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+import { Href, Link } from 'expo-router';
+import { openBrowserAsync, WebBrowserPresentationStyle } from 'expo-web-browser';
+import { type ComponentProps } from 'react';
+
+type Props = Omit<ComponentProps<typeof Link>, 'href'> & { href: Href & string };
+
+export function ExternalLink({ href, ...rest }: Props) {
+  return (
+    <Link
+      target="_blank"
+      {...rest}
+      href={href}
+      onPress={async (event) => {
+        if (process.env.EXPO_OS !== 'web') {
+          // Prevent the default behavior of linking to the default browser on native.
+          event.preventDefault();
+          // Open the link in an in-app browser.
+          await openBrowserAsync(href, {
+            presentationStyle: WebBrowserPresentationStyle.AUTOMATIC,
+          });
+        }
+      }}
+    />
+  );
+}

FastNotes/components/haptic-tab.tsx

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+import { BottomTabBarButtonProps } from '@react-navigation/bottom-tabs';
+import { PlatformPressable } from '@react-navigation/elements';
+import * as Haptics from 'expo-haptics';
+
+export function HapticTab(props: BottomTabBarButtonProps) {
+  return (
+    <PlatformPressable
+      {...props}
+      onPressIn={(ev) => {
+        if (process.env.EXPO_OS === 'ios') {
+          // Add a soft haptic feedback when pressing down on the tabs.
+          Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
+        }
+        props.onPressIn?.(ev);
+      }}
+    />
+  );
+}

FastNotes/components/hello-wave.tsx

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+import Animated from 'react-native-reanimated';
+
+export function HelloWave() {
+  return (
+    <Animated.Text
+      style={{
+        fontSize: 28,
+        lineHeight: 32,
+        marginTop: -6,
+        animationName: {
+          '50%': { transform: [{ rotate: '25deg' }] },
+        },
+        animationIterationCount: 4,
+        animationDuration: '300ms',
+      }}>
+      👋
+    </Animated.Text>
+  );
+}

FastNotes/components/parallax-scroll-view.tsx

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+import type { PropsWithChildren, ReactElement } from 'react';
+import { StyleSheet } from 'react-native';
+import Animated, {
+  interpolate,
+  useAnimatedRef,
+  useAnimatedStyle,
+  useScrollOffset,
+} from 'react-native-reanimated';
+
+import { ThemedView } from '@/components/themed-view';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+const HEADER_HEIGHT = 250;
+
+type Props = PropsWithChildren<{
+  headerImage: ReactElement;
+  headerBackgroundColor: { dark: string; light: string };
+}>;
+
+export default function ParallaxScrollView({
+  children,
+  headerImage,
+  headerBackgroundColor,
+}: Props) {
+  const backgroundColor = useThemeColor({}, 'background');
+  const colorScheme = useColorScheme() ?? 'light';
+  const scrollRef = useAnimatedRef<Animated.ScrollView>();
+  const scrollOffset = useScrollOffset(scrollRef);
+  const headerAnimatedStyle = useAnimatedStyle(() => {
+    return {
+      transform: [
+        {
+          translateY: interpolate(
+            scrollOffset.value,
+            [-HEADER_HEIGHT, 0, HEADER_HEIGHT],
+            [-HEADER_HEIGHT / 2, 0, HEADER_HEIGHT * 0.75]
+          ),
+        },
+        {
+          scale: interpolate(scrollOffset.value, [-HEADER_HEIGHT, 0, HEADER_HEIGHT], [2, 1, 1]),
+        },
+      ],
+    };
+  });
+
+  return (
+    <Animated.ScrollView
+      ref={scrollRef}
+      style={{ backgroundColor, flex: 1 }}
+      scrollEventThrottle={16}>
+      <Animated.View
+        style={[
+          styles.header,
+          { backgroundColor: headerBackgroundColor[colorScheme] },
+          headerAnimatedStyle,
+        ]}>
+        {headerImage}
+      </Animated.View>
+      <ThemedView style={styles.content}>{children}</ThemedView>
+    </Animated.ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+  },
+  header: {
+    height: HEADER_HEIGHT,
+    overflow: 'hidden',
+  },
+  content: {
+    flex: 1,
+    padding: 32,
+    gap: 16,
+    overflow: 'hidden',
+  },
+});

FastNotes/components/themed-text.tsx

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+import { StyleSheet, Text, type TextProps } from 'react-native';
+
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+export type ThemedTextProps = TextProps & {
+  lightColor?: string;
+  darkColor?: string;
+  type?: 'default' | 'title' | 'defaultSemiBold' | 'subtitle' | 'link';
+};
+
+export function ThemedText({
+  style,
+  lightColor,
+  darkColor,
+  type = 'default',
+  ...rest
+}: ThemedTextProps) {
+  const color = useThemeColor({ light: lightColor, dark: darkColor }, 'text');
+
+  return (
+    <Text
+      style={[
+        { color },
+        type === 'default' ? styles.default : undefined,
+        type === 'title' ? styles.title : undefined,
+        type === 'defaultSemiBold' ? styles.defaultSemiBold : undefined,
+        type === 'subtitle' ? styles.subtitle : undefined,
+        type === 'link' ? styles.link : undefined,
+        style,
+      ]}
+      {...rest}
+    />
+  );
+}
+
+const styles = StyleSheet.create({
+  default: {
+    fontSize: 16,
+    lineHeight: 24,
+  },
+  defaultSemiBold: {
+    fontSize: 16,
+    lineHeight: 24,
+    fontWeight: '600',
+  },
+  title: {
+    fontSize: 32,
+    fontWeight: 'bold',
+    lineHeight: 32,
+  },
+  subtitle: {
+    fontSize: 20,
+    fontWeight: 'bold',
+  },
+  link: {
+    lineHeight: 30,
+    fontSize: 16,
+    color: '#0a7ea4',
+  },
+});

FastNotes/components/themed-view.tsx

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+import { View, type ViewProps } from 'react-native';
+
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+export type ThemedViewProps = ViewProps & {
+  lightColor?: string;
+  darkColor?: string;
+};
+
+export function ThemedView({ style, lightColor, darkColor, ...otherProps }: ThemedViewProps) {
+  const backgroundColor = useThemeColor({ light: lightColor, dark: darkColor }, 'background');
+
+  return <View style={[{ backgroundColor }, style]} {...otherProps} />;
+}

FastNotes/components/ui/collapsible.tsx

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+import { PropsWithChildren, useState } from 'react';
+import { StyleSheet, TouchableOpacity } from 'react-native';
+
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+import { IconSymbol } from '@/components/ui/icon-symbol';
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export function Collapsible({ children, title }: PropsWithChildren & { title: string }) {
+  const [isOpen, setIsOpen] = useState(false);
+  const theme = useColorScheme() ?? 'light';
+
+  return (
+    <ThemedView>
+      <TouchableOpacity
+        style={styles.heading}
+        onPress={() => setIsOpen((value) => !value)}
+        activeOpacity={0.8}>
+        <IconSymbol
+          name="chevron.right"
+          size={18}
+          weight="medium"
+          color={theme === 'light' ? Colors.light.icon : Colors.dark.icon}
+          style={{ transform: [{ rotate: isOpen ? '90deg' : '0deg' }] }}
+        />
+
+        <ThemedText type="defaultSemiBold">{title}</ThemedText>
+      </TouchableOpacity>
+      {isOpen && <ThemedView style={styles.content}>{children}</ThemedView>}
+    </ThemedView>
+  );
+}
+
+const styles = StyleSheet.create({
+  heading: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 6,
+  },
+  content: {
+    marginTop: 6,
+    marginLeft: 24,
+  },
+});

FastNotes/components/ui/icon-symbol.ios.tsx

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+import { SymbolView, SymbolViewProps, SymbolWeight } from 'expo-symbols';
+import { StyleProp, ViewStyle } from 'react-native';
+
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+  weight = 'regular',
+}: {
+  name: SymbolViewProps['name'];
+  size?: number;
+  color: string;
+  style?: StyleProp<ViewStyle>;
+  weight?: SymbolWeight;
+}) {
+  return (
+    <SymbolView
+      weight={weight}
+      tintColor={color}
+      resizeMode="scaleAspectFit"
+      name={name}
+      style={[
+        {
+          width: size,
+          height: size,
+        },
+        style,
+      ]}
+    />
+  );
+}

FastNotes/components/ui/icon-symbol.tsx

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+// Fallback for using MaterialIcons on Android and web.
+
+import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import { SymbolWeight, SymbolViewProps } from 'expo-symbols';
+import { ComponentProps } from 'react';
+import { OpaqueColorValue, type StyleProp, type TextStyle } from 'react-native';
+
+type IconMapping = Record<SymbolViewProps['name'], ComponentProps<typeof MaterialIcons>['name']>;
+type IconSymbolName = keyof typeof MAPPING;
+
+/**
+ * Add your SF Symbols to Material Icons mappings here.
+ * - see Material Icons in the [Icons Directory](https://icons.expo.fyi).
+ * - see SF Symbols in the [SF Symbols](https://developer.apple.com/sf-symbols/) app.
+ */
+const MAPPING = {
+  'house.fill': 'home',
+  'paperplane.fill': 'send',
+  'chevron.left.forwardslash.chevron.right': 'code',
+  'chevron.right': 'chevron-right',
+} as IconMapping;
+
+/**
+ * An icon component that uses native SF Symbols on iOS, and Material Icons on Android and web.
+ * This ensures a consistent look across platforms, and optimal resource usage.
+ * Icon `name`s are based on SF Symbols and require manual mapping to Material Icons.
+ */
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+}: {
+  name: IconSymbolName;
+  size?: number;
+  color: string | OpaqueColorValue;
+  style?: StyleProp<TextStyle>;
+  weight?: SymbolWeight;
+}) {
+  return <MaterialIcons color={color} size={size} name={MAPPING[name]} style={style} />;
+}

FastNotes/constants/theme.ts

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+/**
+ * Below are the colors that are used in the app. The colors are defined in the light and dark mode.
+ * There are many other ways to style your app. For example, [Nativewind](https://www.nativewind.dev/), [Tamagui](https://tamagui.dev/), [unistyles](https://reactnativeunistyles.vercel.app), etc.
+ */
+
+import { Platform } from 'react-native';
+
+const tintColorLight = '#0a7ea4';
+const tintColorDark = '#fff';
+
+export const Colors = {
+  light: {
+    text: '#11181C',
+    background: '#fff',
+    tint: tintColorLight,
+    icon: '#687076',
+    tabIconDefault: '#687076',
+    tabIconSelected: tintColorLight,
+  },
+  dark: {
+    text: '#ECEDEE',
+    background: '#151718',
+    tint: tintColorDark,
+    icon: '#9BA1A6',
+    tabIconDefault: '#9BA1A6',
+    tabIconSelected: tintColorDark,
+  },
+};
+
+export const Fonts = Platform.select({
+  ios: {
+    /** iOS `UIFontDescriptorSystemDesignDefault` */
+    sans: 'system-ui',
+    /** iOS `UIFontDescriptorSystemDesignSerif` */
+    serif: 'ui-serif',
+    /** iOS `UIFontDescriptorSystemDesignRounded` */
+    rounded: 'ui-rounded',
+    /** iOS `UIFontDescriptorSystemDesignMonospaced` */
+    mono: 'ui-monospace',
+  },
+  default: {
+    sans: 'normal',
+    serif: 'serif',
+    rounded: 'normal',
+    mono: 'monospace',
+  },
+  web: {
+    sans: "system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif",
+    serif: "Georgia, 'Times New Roman', serif",
+    rounded: "'SF Pro Rounded', 'Hiragino Maru Gothic ProN', Meiryo, 'MS PGothic', sans-serif",
+    mono: "SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
+  },
+});

FastNotes/eslint.config.js

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+// https://docs.expo.dev/guides/using-eslint/
+const { defineConfig } = require('eslint/config');
+const expoConfig = require('eslint-config-expo/flat');
+
+module.exports = defineConfig([
+  expoConfig,
+  {
+    ignores: ['dist/*'],
+  },
+]);

FastNotes/hooks/use-color-scheme.ts

@@ -0,0 +1 @@
+export { useColorScheme } from 'react-native';

FastNotes/hooks/use-color-scheme.web.ts

@@ -0,0 +1,21 @@
+import { useEffect, useState } from 'react';
+import { useColorScheme as useRNColorScheme } from 'react-native';
+
+/**
+ * To support static rendering, this value needs to be re-calculated on the client side for web
+ */
+export function useColorScheme() {
+  const [hasHydrated, setHasHydrated] = useState(false);
+
+  useEffect(() => {
+    setHasHydrated(true);
+  }, []);
+
+  const colorScheme = useRNColorScheme();
+
+  if (hasHydrated) {
+    return colorScheme;
+  }
+
+  return 'light';
+}

FastNotes/hooks/use-theme-color.ts

@@ -0,0 +1,21 @@
+/**
+ * Learn more about light and dark modes:
+ * https://docs.expo.dev/guides/color-schemes/
+ */
+
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export function useThemeColor(
+  props: { light?: string; dark?: string },
+  colorName: keyof typeof Colors.light & keyof typeof Colors.dark
+) {
+  const theme = useColorScheme() ?? 'light';
+  const colorFromProps = props[theme];
+
+  if (colorFromProps) {
+    return colorFromProps;
+  } else {
+    return Colors[theme][colorName];
+  }
+}

FastNotes/package.json

@@ -0,0 +1,47 @@
+{
+  "name": "fastnotes",
+  "main": "expo-router/entry",
+  "version": "1.0.0",
+  "scripts": {
+    "start": "expo start",
+    "reset-project": "node ./scripts/reset-project.js",
+    "android": "expo start --android",
+    "ios": "expo start --ios",
+    "web": "expo start --web",
+    "lint": "expo lint"
+  },
+  "dependencies": {
+    "@expo/vector-icons": "^15.0.3",
+    "@react-navigation/bottom-tabs": "^7.4.0",
+    "@react-navigation/elements": "^2.6.3",
+    "@react-navigation/native": "^7.1.28",
+    "expo": "~54.0.33",
+    "expo-constants": "~18.0.13",
+    "expo-font": "~14.0.11",
+    "expo-haptics": "~15.0.8",
+    "expo-image": "~3.0.11",
+    "expo-linking": "~8.0.11",
+    "expo-router": "~6.0.23",
+    "expo-splash-screen": "~31.0.13",
+    "expo-status-bar": "~3.0.9",
+    "expo-symbols": "~1.0.8",
+    "expo-system-ui": "~6.0.9",
+    "expo-web-browser": "~15.0.10",
+    "react": "19.1.0",
+    "react-dom": "19.1.0",
+    "react-native": "0.81.5",
+    "react-native-gesture-handler": "~2.28.0",
+    "react-native-reanimated": "~4.1.1",
+    "react-native-safe-area-context": "~5.6.0",
+    "react-native-screens": "~4.16.0",
+    "react-native-web": "~0.21.0",
+    "react-native-worklets": "0.5.1"
+  },
+  "devDependencies": {
+    "@types/react": "~19.1.0",
+    "eslint": "^9.25.0",
+    "eslint-config-expo": "~10.0.0",
+    "typescript": "~5.9.2"
+  },
+  "private": true
+}

FastNotes/scripts/reset-project.js

@@ -0,0 +1,112 @@
+#!/usr/bin/env node
+
+/**
+ * This script is used to reset the project to a blank state.
+ * It deletes or moves the /app, /components, /hooks, /scripts, and /constants directories to /app-example based on user input and creates a new /app directory with an index.tsx and _layout.tsx file.
+ * You can remove the `reset-project` script from package.json and safely delete this file after running it.
+ */
+
+const fs = require("fs");
+const path = require("path");
+const readline = require("readline");
+
+const root = process.cwd();
+const oldDirs = ["app", "components", "hooks", "constants", "scripts"];
+const exampleDir = "app-example";
+const newAppDir = "app";
+const exampleDirPath = path.join(root, exampleDir);
+
+const indexContent = `import { Text, View } from "react-native";
+
+export default function Index() {
+  return (
+    <View
+      style={{
+        flex: 1,
+        justifyContent: "center",
+        alignItems: "center",
+      }}
+    >
+      <Text>Edit app/index.tsx to edit this screen.</Text>
+    </View>
+  );
+}
+`;
+
+const layoutContent = `import { Stack } from "expo-router";
+
+export default function RootLayout() {
+  return <Stack />;
+}
+`;
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const moveDirectories = async (userInput) => {
+  try {
+    if (userInput === "y") {
+      // Create the app-example directory
+      await fs.promises.mkdir(exampleDirPath, { recursive: true });
+      console.log(`📁 /${exampleDir} directory created.`);
+    }
+
+    // Move old directories to new app-example directory or delete them
+    for (const dir of oldDirs) {
+      const oldDirPath = path.join(root, dir);
+      if (fs.existsSync(oldDirPath)) {
+        if (userInput === "y") {
+          const newDirPath = path.join(root, exampleDir, dir);
+          await fs.promises.rename(oldDirPath, newDirPath);
+          console.log(`➡️ /${dir} moved to /${exampleDir}/${dir}.`);
+        } else {
+          await fs.promises.rm(oldDirPath, { recursive: true, force: true });
+          console.log(`❌ /${dir} deleted.`);
+        }
+      } else {
+        console.log(`➡️ /${dir} does not exist, skipping.`);
+      }
+    }
+
+    // Create new /app directory
+    const newAppDirPath = path.join(root, newAppDir);
+    await fs.promises.mkdir(newAppDirPath, { recursive: true });
+    console.log("\n📁 New /app directory created.");
+
+    // Create index.tsx
+    const indexPath = path.join(newAppDirPath, "index.tsx");
+    await fs.promises.writeFile(indexPath, indexContent);
+    console.log("📄 app/index.tsx created.");
+
+    // Create _layout.tsx
+    const layoutPath = path.join(newAppDirPath, "_layout.tsx");
+    await fs.promises.writeFile(layoutPath, layoutContent);
+    console.log("📄 app/_layout.tsx created.");
+
+    console.log("\n✅ Project reset complete. Next steps:");
+    console.log(
+      `1. Run \`npx expo start\` to start a development server.\n2. Edit app/index.tsx to edit the main screen.${
+        userInput === "y"
+          ? `\n3. Delete the /${exampleDir} directory when you're done referencing it.`
+          : ""
+      }`
+    );
+  } catch (error) {
+    console.error(`❌ Error during script execution: ${error.message}`);
+  }
+};
+
+rl.question(
+  "Do you want to move existing files to /app-example instead of deleting them? (Y/n): ",
+  (answer) => {
+    const userInput = answer.trim().toLowerCase() || "y";
+    if (userInput === "y" || userInput === "n") {
+      moveDirectories(userInput).finally(() => rl.close());
+    } else {
+      console.log("❌ Invalid input. Please enter 'Y' or 'N'.");
+      rl.close();
+    }
+  }
+);

FastNotes/src/notes/NotesContext.tsx

@@ -0,0 +1,47 @@
+import React, { createContext, useContext, useMemo, useState } from "react";
+
+export type Note =
+{
+    id: string;
+    title: string;
+    content: string;
+};
+
+type NotesContextValue =
+{
+    notes: Note[];
+    addNote: (title: string, content: string) => void;
+};
+
+const NotesContext = createContext<NotesContextValue | undefined>(undefined);
+
+export function NotesProvider({ children }: { children: React.ReactNode })
+{
+    const [notes, setNotes] = useState<Note[]>
+    ([
+        { id: "1", title: "Second Note", content: "Follow up note - also hard coded" },
+        { id: "2", title: "First Note", content: "This is the first note currently hard coded" }
+    ]);
+
+    const addNote = (title: string, content: string) =>
+    {
+        const newNote: Note =
+        { 
+            id: Date.now().toString(),
+            title: title.trim() || "(Untitled)",
+            content: content.trim()
+        };
+      setNotes((prev) => [newNote, ...prev])  
+    };
+
+    const value = useMemo(() => ({ notes, addNote }), [notes]);
+
+    return <NotesContext.Provider value={value}>{children}</NotesContext.Provider>;
+}
+
+export function useNotes()
+{
+    const ctx = useContext(NotesContext);
+    if(!ctx) throw new Error("useNotes must be used inside NotesProvider");
+    return ctx;
+}

FastNotes/tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "extends": "expo/tsconfig.base",
+  "compilerOptions": {
+    "strict": true,
+    "paths": {
+      "@/*": [
+        "./*"
+      ]
+    }
+  },
+  "include": [
+    "**/*.ts",
+    "**/*.tsx",
+    ".expo/types/**/*.ts",
+    "expo-env.d.ts"
+  ]
+}