Toast.tsx

import * as React from "react";
import { StyleSheet, Text, View } from "react-native";
import { ToastType } from "./ToastProvider";
import { useToast } from "../hooks/useToast";

export const Toast: React.FC = () => {
  // Toast is using hook to retrieve config and to hide itself
  const { toastConfig, hideToast } = useToast();

  React.useEffect(() => {
    if (!toastConfig) {
      return;
    }

    // Sets up a timer to hide toast after duration
    const timer = setTimeout(hideToast, toastConfig.duration);

    return () => clearTimeout(timer);
  }, [toastConfig, hideToast]);

  // When config is null, toast is hidden
  if (!toastConfig) {
    return null;
  }

  const { type, message } = toastConfig;

  let backgroundColor;
  switch (type) {
    case ToastType.Info:
      backgroundColor = 'blue';
      break;
    case ToastType.Error:
      backgroundColor = 'red';
      break;
    case ToastType.Success:
      backgroundColor = 'green';
      break;
  }

  return (
    <View style={styles.container}>
      <View style={[styles.toast, { backgroundColor }]}>
        <Text style={styles.message}>{message}</Text>
      </View>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    alignSelf: "center",
    position: "absolute",
    bottom: 0, // Right now toast is at the very bottom, we will solve this later
    marginHorizontal: 20,
    maxWidth: 480,
  },
  toast: {
    borderRadius: 6,
    padding: 16,
  },
  message: {
    fontSize: 16,
    textAlign: "center",
    color: '#fff',
  },
});