Virtual Events app with React Native (notJust.Hack Workshop)

Introduction

Let’s build a Virtual Event Application with React Native. Shall we?

You can follow this build in video format here:

If you want to follow along, and build this application yourself, make sure to download the Asset bundle that contains all the dummy data, pre-defined components, PDF presentation and more.

Download the Asset Bundle 👇

To get the Source Code, PDF guide, dummy data, images, etc.

Context

This project is part of the notJust.Hack event, and the goal is to show you that it is possible to build a functional application in just 3 days.

For that reason, I will approach this project in a similar way you would approach a Hackathon project.

The Problem:
Organizing a multi day event such as notJust.Hack, I encounter the problem of sharing the schedule of the event, so that attendees will know what to expect when.

The Solution:
A mobile app that will display information about a Virtual Event, will show a clear schedule and let people RSPV to the sessions that they are interested in.

Attendees will have the possibility to chat and network in the application.

Let’s initialize the App using expo

BASH

npx create-expo-app VirtualEvents --template tabs

Start the development server

BASH

npm start

Run the applicaton by pressing i to run on iOS device/emulator or a to run on android device/simulator.
You can also scan the QR code using Expo Go App on your physical device

Calendar

For the calendar view, we will use the React Native Calendar library. Check out the docs here

Install
BASH
```
npx expo install react-native-calendars
```

Render an Agenda inside the screens/TabOneScreen.tsx

JAVASCRIPT

import { Alert, Pressable, StyleSheet } from "react-native";

import { Text, View } from "../components/Themed";
import { RootTabScreenProps } from "../types";
import {
  Agenda,
  AgendaEntry,
  AgendaSchedule,
  DateData,
} from "react-native-calendars";
import { useState } from "react";
import events from "../assets/data/events.json";

export default function TabOneScreen({
  navigation,
}: RootTabScreenProps<"TabOne">) {
  const [items, setItems] = useState<AgendaSchedule>({});

  const loadItems = (day: DateData) => {
    setItems(events);
  };

  const renderEmptyDate = () => {
    return (
      <View style={styles.emptyDate}>
        <Text>This is empty date!</Text>
      </View>
    );
  };

  const renderItem = (reservation: AgendaEntry, isFirst: boolean) => {
    const fontSize = isFirst ? 16 : 14;
    const color = isFirst ? "black" : "#43515c";

    return (
      <Pressable
        style={[styles.item, { height: reservation.height }]}
        onPress={() => Alert.alert(reservation.name)}
      >
        <Text style={{ fontSize, color }}>{reservation.name}</Text>
      </Pressable>
    );
  };
  return (
    <View style={styles.container}>
      <Agenda
        items={items}
        selected={"2022-11-25"}
        renderItem={renderItem}
        renderEmptyDate={renderEmptyDate}
        loadItemsForMonth={loadItems}
        // showOnlySelectedDayItems
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  item: {
    backgroundColor: "white",
    flex: 1,
    borderRadius: 5,
    padding: 10,
    marginRight: 10,
    marginTop: 17,
  },
  emptyDate: {
    height: 15,
    flex: 1,
    paddingTop: 30,
  },
});

Event detailed page

Let’s display the details of the event in a Modal. For that, we can use the existing screens/ModalScreen.tsx

Open the modal when we press on an item in the Agenda List

JAVASCRIPT

onPress={() => navigation.navigate("Modal", {id: event.id})}

Now, let’s Render the deatils of the event

JAVASCRIPT

import { AntDesign } from "@expo/vector-icons";
import { StatusBar } from "expo-status-bar";
import { Platform, StyleSheet, Image } from "react-native";

import { Text, View } from "../components/Themed";
import { RootStackScreenProps } from "../types";
import CustomButton from "../components/CustomButton";
import users from "../assets/data/users.json";
import event from "../assets/data/event.json";

export default function ModalScreen({
  route,
  navigation,
}: RootStackScreenProps<"Modal">) {
  const id = route.params.id;
  console.log("Rendering event ", id);

  const onJoin = () => {};

  return (
    <View style={styles.container}>
      <Text style={styles.title}>{event.name}</Text>
      <Text style={styles.time}>
        <AntDesign name="calendar" size={24} color={"black"} />
        {"  | "}
        {new Date(event.date).toDateString()}
      </Text>

      <View style={styles.footer}>
        <Text style={styles.subtitle}>Attendees</Text>
        <View style={styles.users}>
          {users?.map((user, i) => (
            <Image
              source={{ uri: user.avatarUrl }}
              style={[
                styles.userAvatar,
                { transform: [{ translateX: -15 * i }] },
              ]}
              key={user.id}
            />
          ))}
          <View
            style={[
              styles.userAvatar,
              {
                transform: [{ translateX: -15 * users.length }],
              },
            ]}
          >
            <Text>+{users.length}</Text>
          </View>
        </View>

        <CustomButton text="Join the event" onPress={onJoin} />
      </View>

      {/* Use a light status bar on iOS to account for the black space above the modal */}
      <StatusBar style={Platform.OS === "ios" ? "light" : "auto"} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 10,
    paddingBottom: 25,
  },
  title: {
    fontSize: 24,
    fontWeight: "bold",
    marginVertical: 10,
  },
  subtitle: {
    fontSize: 18,
    fontWeight: "bold",
  },
  time: {
    fontSize: 20,
  },
  footer: {
    marginTop: "auto",
  },
  users: {
    flexDirection: "row",
    marginVertical: 10,
  },
  userAvatar: {
    width: 50,
    aspectRatio: 1,
    borderRadius: 30,
    margin: 2,
    borderColor: "white",
    borderWidth: 2,
    justifyContent: "center",
    alignItems: "center",
    backgroundColor: "gainsboro",
  },
});

Render Users

Create a new component components/UserListItem.tsx

JAVASCRIPT

import { View, Text, Image, StyleSheet } from 'react-native';
import React from 'react';

type UserListItemProps = {
  user: any,
};

const UserListItem = ({ user }: UserListItemProps) => {
  return (
    <View style={styles.container}>
      <Image source={{ uri: user.avatarUrl }} style={styles.image} />
      <Text style={styles.name}>{user.displayName}</Text>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flexDirection: 'row',
    alignItems: 'center',
    padding: 5,
    margin: 5,
    marginHorizontal: 10,
    backgroundColor: 'white',
    borderRadius: 5,
  },
  image: {
    width: 50,
    aspectRatio: 1,
    borderRadius: 50,
  },
  name: {
    fontWeight: 'bold',
    marginLeft: 10,
  },
});

export default UserListItem;

Create a new Screen screens/UsersScreen.tsx

JAVASCRIPT

import users from '../assets/data/users.json';
import { FlatList } from 'react-native';
import UserListItem from '../components/UserListItem';

const UsersScreen = () => {
  return (
    <FlatList
      data={users}
      renderItem={({ item }) => <UserListItem user={item} />}
    />
  );
};

export default UsersScreen;

Add the screen as a Modal in the navigation/index.ts
Link the header button from the TabOneScreen to open the Users modal

My Account

Let’s use screens/TabTwoScreen as our Profile Page.

JAVASCRIPT

import { StyleSheet, Image } from "react-native";

import { Text, View } from "../components/Themed";
import CustomButton from "../components/CustomButton";
import users from "../assets/data/users.json";

const user = users[0];

export default function TabTwoScreen() {
  return (
    <View style={styles.container}>
      <Image source={{ uri: user?.avatarUrl }} style={styles.avatar} />
      <Text style={styles.name}>{user?.displayName}</Text>
      <View style={{ marginTop: "auto" }}>
        <CustomButton
          onPress={() => {}}
          text="Sign out"
          type="TERTIARY"
          fgColor="crimson"
        />
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 10,
    alignItems: "center",
  },
  avatar: {
    width: 100,
    aspectRatio: 1,
    borderRadius: 50,
  },
  name: {
    fontWeight: "bold",
    fontSize: 22,
    marginVertical: 15,
    color: "dimgray",
  },
});

Authentication Screens

For the authentication screens, we will re-use the Auth Screens that we have build in this playlist.

Install react-hook-form

JAVASCRIPT

npx expo install react-hook-form

From the Asset Bundle, add AuthScreens inside our screens folder
Add the SignIn and SignOut screens in our RootNavigator

JAVASCRIPT

const isAuthenticated = false;

if (!isAuthenticated) {
  return (
    <Stack.Navigator>
      <Stack.Screen
        name="SignIn"
        component={SignInScreen}
        options={{ title: "Sign in", headerShown: false }}
      />
      <Stack.Screen
        name="SignUp"
        component={SignUpScreen}
        options={{ title: "Create an account" }}
      />
    </Stack.Navigator>
  );
}

return (...)

Next steps

Check out the next part of this project, where we implement the backend of this application using Nhost

✅ Authentications
✅ Database & GraphQL API
✅ Storage
✅ Apollo Client

Watch it live on youtube:

Virtual Events app with React Native (notJust.Hack Workshop)

Introduction

Download the Asset Bundle 👇

Context

Let’s initialize the App using expo

Calendar

Event detailed page

Render Users

My Account

Authentication Screens

Next steps

Vadim Savin

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