start of a expo react native app for display

nodejs/OWDisplay/.gitignore

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+node_modules/
+.expo/
+dist/
+npm-debug.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+*.orig.*
+web-build/
+
+# macOS
+.DS_Store
+
+# @generated expo-cli sync-2b81b286409207a5da26e14c78851eb30d8ccbdb
+# The following patterns were generated by expo-cli
+
+expo-env.d.ts
+# @end expo-cli

nodejs/OWDisplay/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.

nodejs/OWDisplay/app.json

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+{
+  "expo": {
+    "name": "OWDisplay",
+    "slug": "OWDisplay",
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/images/icon.png",
+    "scheme": "myapp",
+    "userInterfaceStyle": "automatic",
+    "splash": {
+      "image": "./assets/images/splash.png",
+      "resizeMode": "contain",
+      "backgroundColor": "#ffffff"
+    },
+    "ios": {
+      "supportsTablet": true
+    },
+    "android": {
+      "adaptiveIcon": {
+        "foregroundImage": "./assets/images/adaptive-icon.png",
+        "backgroundColor": "#ffffff"
+      }
+    },
+    "web": {
+      "bundler": "metro",
+      "output": "static",
+      "favicon": "./assets/images/favicon.png"
+    },
+    "plugins": [
+      "expo-router"
+    ],
+    "experiments": {
+      "typedRoutes": true
+    }
+  }
+}

nodejs/OWDisplay/app/(tabs)/_layout.tsx

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+import { Tabs } from 'expo-router';
+import React from 'react';
+
+import { TabBarIcon } from '@/components/navigation/TabBarIcon';
+import { Colors } from '@/constants/Colors';
+import { useColorScheme } from '@/hooks/useColorScheme';
+
+export default function TabLayout() {
+  const colorScheme = useColorScheme();
+
+  return (
+    <Tabs
+      screenOptions={{
+        tabBarActiveTintColor: Colors[colorScheme ?? 'light'].tint,
+        headerShown: false,
+      }}>
+      <Tabs.Screen
+        name="index"
+        options={{
+          title: 'Home',
+          tabBarIcon: ({ color, focused }) => (
+            <TabBarIcon name={focused ? 'home' : 'home-outline'} color={color} />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="explore"
+        options={{
+          title: 'Explore',
+          tabBarIcon: ({ color, focused }) => (
+            <TabBarIcon name={focused ? 'code-slash' : 'code-slash-outline'} color={color} />
+          ),
+        }}
+      />
+    </Tabs>
+  );
+}

nodejs/OWDisplay/app/(tabs)/explore.tsx

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+import Ionicons from '@expo/vector-icons/Ionicons';
+import { StyleSheet, Image, Platform } from 'react-native';
+
+import { Collapsible } from '@/components/Collapsible';
+import { ExternalLink } from '@/components/ExternalLink';
+import ParallaxScrollView from '@/components/ParallaxScrollView';
+import { ThemedText } from '@/components/ThemedText';
+import { ThemedView } from '@/components/ThemedView';
+
+export default function TabTwoScreen() {
+  return (
+    <ParallaxScrollView
+      headerBackgroundColor={{ light: '#D0D0D0', dark: '#353636' }}
+      headerImage={<Ionicons size={310} name="code-slash" style={styles.headerImage} />}>
+      <ThemedView style={styles.titleContainer}>
+        <ThemedText type="title">Explore</ThemedText>
+      </ThemedView>
+      <ThemedText>This app includes example code to help you get started.</ThemedText>
+      <Collapsible title="File-based routing">
+        <ThemedText>
+          This app has two screens:{' '}
+          <ThemedText type="defaultSemiBold">app/(tabs)/index.tsx</ThemedText> and{' '}
+          <ThemedText type="defaultSemiBold">app/(tabs)/explore.tsx</ThemedText>
+        </ThemedText>
+        <ThemedText>
+          The layout file in <ThemedText type="defaultSemiBold">app/(tabs)/_layout.tsx</ThemedText>{' '}
+          sets up the tab navigator.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/router/introduction">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Android, iOS, and web support">
+        <ThemedText>
+          You can open this project on Android, iOS, and the web. To open the web version, press{' '}
+          <ThemedText type="defaultSemiBold">w</ThemedText> in the terminal running this project.
+        </ThemedText>
+      </Collapsible>
+      <Collapsible title="Images">
+        <ThemedText>
+          For static images, you can use the <ThemedText type="defaultSemiBold">@2x</ThemedText> and{' '}
+          <ThemedText type="defaultSemiBold">@3x</ThemedText> suffixes to provide files for
+          different screen densities
+        </ThemedText>
+        <Image source={require('@/assets/images/react-logo.png')} style={{ alignSelf: 'center' }} />
+        <ExternalLink href="https://reactnative.dev/docs/images">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Custom fonts">
+        <ThemedText>
+          Open <ThemedText type="defaultSemiBold">app/_layout.tsx</ThemedText> to see how to load{' '}
+          <ThemedText style={{ fontFamily: 'SpaceMono' }}>
+            custom fonts such as this one.
+          </ThemedText>
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/versions/latest/sdk/font">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Light and dark mode components">
+        <ThemedText>
+          This template has light and dark mode support. The{' '}
+          <ThemedText type="defaultSemiBold">useColorScheme()</ThemedText> hook lets you inspect
+          what the user's current color scheme is, and so you can adjust UI colors accordingly.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/develop/user-interface/color-themes/">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Animations">
+        <ThemedText>
+          This template includes an example of an animated component. The{' '}
+          <ThemedText type="defaultSemiBold">components/HelloWave.tsx</ThemedText> component uses
+          the powerful <ThemedText type="defaultSemiBold">react-native-reanimated</ThemedText> library
+          to create a waving hand animation.
+        </ThemedText>
+        {Platform.select({
+          ios: (
+            <ThemedText>
+              The <ThemedText type="defaultSemiBold">components/ParallaxScrollView.tsx</ThemedText>{' '}
+              component provides a parallax effect for the header image.
+            </ThemedText>
+          ),
+        })}
+      </Collapsible>
+    </ParallaxScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  headerImage: {
+    color: '#808080',
+    bottom: -90,
+    left: -35,
+    position: 'absolute',
+  },
+  titleContainer: {
+    flexDirection: 'row',
+    gap: 8,
+  },
+});

nodejs/OWDisplay/app/(tabs)/index.tsx

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+import React, { useState, useEffect } from "react";
+import { View, Text, TextInput, Button, StyleSheet } from "react-native";
+import { useRouter, useLocalSearchParams } from "expo-router";
+
+import SessionInput from "@components/SessionInput";
+import SettingsButton from "@components/SettingsButton";
+import SettingsPanel from "@components/SettingsPanel";
+import TextDisplay from "@components/TextDisplay";
+import messageTypes from "@utils/messageTypes.json";
+import initialTextSettings from "@utils/initialTextSettings.json";
+import WebRTCService from "@services/WebRTCService";
+
+const Home = () => {
+  const [isConnected, setIsConnected] = useState(false);
+  const [sessionId, setSessionId] = useState("");
+  const [webrtcService, setWebrtcService] = useState(null);
+  const [settings, setSettings] = useState(initialTextSettings);
+  const [live, setLive] = useState(false);
+  const [showSettings, setShowSettings] = useState(false);
+  const [text, setText] = useState("Waiting for messages...");
+  const router = useRouter();
+  const params = useLocalSearchParams();
+
+  const websocketURL = process.env.NEXT_PUBLIC_WS_URL;
+
+  useEffect(() => {
+    if (params.sessionId) {
+      setSessionId(params.sessionId as string);
+    }
+  }, [params]);
+
+  useEffect(() => {
+    if (sessionId && websocketURL) {
+      const service = new WebRTCService((receivedMessage: string) => {
+        const messageData = JSON.parse(receivedMessage);
+
+        setLive(messageData.isLiveTyping);
+        if (messageData.type === messageTypes.MESSAGE) {
+          setText(messageData.content);
+        }
+      }, false);
+
+      service.onChannelOpen(() => {
+        setIsConnected(true);
+        console.log("Data channel opened with sender.");
+        service.sendMessage(
+          JSON.stringify({ type: messageTypes.CONNECTED })
+        );
+        console.log("Sent CHANNEL_CONNECTED message to sender.");
+      });
+
+      service.connect(websocketURL, sessionId);
+      setWebrtcService(service);
+
+      return () => {
+        service.disconnect();
+        setIsConnected(false);
+      };
+    }
+  }, [sessionId, websocketURL]);
+
+  const handleConnect = () => {
+    if (sessionId && websocketURL) {
+      const service = new WebRTCService((receivedMessage: string) => {
+        const messageData = JSON.parse(receivedMessage);
+
+        setLive(messageData.isLiveTyping);
+        if (messageData.type === messageTypes.MESSAGE) {
+          setText(messageData.content);
+        }
+      }, false);
+
+      service.onChannelOpen(() => {
+        setIsConnected(true);
+        service.sendMessage(
+          JSON.stringify({ type: messageTypes.CONNECTED })
+        );
+      });
+
+      service.connect(websocketURL, sessionId);
+      setWebrtcService(service);
+    } else {
+      console.warn("Session ID and WebSocket URL are required to connect.");
+    }
+  };
+
+  const handleSessionIdChange = (newSessionId: string) => {
+    setSessionId(newSessionId);
+  };
+
+  return (
+    <View style={styles.container}>
+      {isConnected ? (
+        <TextDisplay
+          key={text}
+          text={text}
+          fontSize={settings.fontSize}
+          fontFamily={settings.fontFamily}
+          animationType={live ? "none" : settings.animationType}
+          backgroundColor={settings.backgroundColor}
+          color={settings.color}
+          lines={settings.lines}
+          speed={settings.speed}
+        />
+      ) : (
+        <SessionInput
+          sessionId={sessionId}
+          handleSessionIdChange={handleSessionIdChange}
+          handleConnect={handleConnect}
+        />
+      )}
+
+      <SettingsButton
+        isConnected={isConnected}
+        setShowSettings={setShowSettings}
+        sessionId={sessionId}
+      />
+
+      {showSettings && (
+        <SettingsPanel
+          settings={settings}
+          onSettingsChange={setSettings}
+          closeSettings={() => setShowSettings(false)}
+        />
+      )}
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    backgroundColor: "#f0f0f0",
+  },
+});
+
+export default Home;