App.js

import { StatusBar } from 'expo-status-bar';
import { Image, StyleSheet, Text, View } from 'react-native';
import ImageViewer from './components/ImageViewer';
import Button from './components/Button';
import * as Imagepicker from "expo-image-picker"
import * as MediaLibrary from 'expo-media-library';
import { useRef, useState } from 'react';
import CircleButton from './components/CircleButton';
import IconButton from './components/IconButton';
import EmojiPicker from './components/EmojiPicker';
import EmojiList from './components/EmojiList';
import EmojiSticker from './components/EmojiSticker';
import { GestureHandlerRootView } from "react-native-gesture-handler";
import { captureRef } from 'react-native-view-shot';

const placeholderImage = require('./assets/images/background-image.png')

export default function App() {
  const imageRef = useRef()
  const [status, requestPermission] = MediaLibrary.usePermissions();
  const [pickedEmoji, setPickedEmoji] = useState(null);
  const [selectedImage, setSelectedImage] = useState(null);
  const [showAppOptions, setShowAppOptions] = useState(false);
  const [isModalVisible, setIsModalVisible] = useState(false);

  if (status === null) {
    requestPermission()
  }

  const pickImageAsync = async () => {
    let result = await Imagepicker.launchImageLibraryAsync({
      allowsEditing: true,
      quality: 1
    })

    if (!result.canceled) {
      setSelectedImage(result.assets[0].uri)
      setShowAppOptions(true)
    } else {
      alert("you did not select any Image")
    }
  }

  const onReset = () => {
    setShowAppOptions(false)
  }

  const onAddSticker = () => {
    setIsModalVisible(true)
  }


  const onModalClose = () => {
    setIsModalVisible(false)
  }

  const onSaveImageAsync = async () => {

    try {
      const localUri = await captureRef(imageRef, {
        height: 400,
        quality: 1
      });

      await MediaLibrary.saveToLibraryAsync(localUri);
      if (localUri) {
        alert('Saved!')
      }
    }

    catch (e) {
      console.log(e)
    }
  }



  return (
    <GestureHandlerRootView style={styles.container}>
      <View style={styles.imageContainer}>
        <View ref={imageRef} collapsable={false}>
          <ImageViewer placeholderImage={placeholderImage} selectedImage={selectedImage} />
          {pickedEmoji && <EmojiSticker imageSize={40} stickerSource={pickedEmoji} />}
        </View>
      </View>

      {showAppOptions ?
        <View style={styles.optionsContainer}>
          <View style={styles.optionsRow}>
            <IconButton icon="refresh" label="Reset" onPress={onReset} />
            <CircleButton onPress={onAddSticker} />
            <IconButton icon="save-alt" label="Save" onPress={onSaveImageAsync} />
          </View>
        </View>
        :
        <View style={styles.footerContainer}>
          <Button theme="primary" label={"Choose a photo"} onPress={pickImageAsync} />
          <Button label={"Use this photo"} onPress={() => setShowAppOptions(true)} />
        </View>
      }

      <EmojiPicker isVisible={isModalVisible} onClose={onModalClose}>
        <EmojiList onSelect={setPickedEmoji} onCloseModal={onModalClose} />
      </EmojiPicker>


      <StatusBar style="auto" />
    </GestureHandlerRootView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#25292e',
    alignItems: 'center',
  },
  imageContainer: {
    flex: 1,
    paddingTop: 58
  },
  footerContainer: {
    flex: 1 / 3,
    alignItems: "center"
  },
  optionsContainer: {
    position: 'absolute',
    bottom: 80,
  },
  optionsRow: {
    alignItems: 'center',
    flexDirection: 'row',
  },
});