Rocket.Chat.ReactNative/app/containers/MessageBox/FilesActions.js

import { PureComponent } from 'react';
import PropTypes from 'prop-types';
import ActionSheet from 'react-native-action-sheet';

import I18n from '../../i18n';

export default class FilesActions extends PureComponent {
	static propTypes = {
		hideActions: PropTypes.func.isRequired,
		takePhoto: PropTypes.func.isRequired,
		chooseFromLibrary: PropTypes.func.isRequired
	}

	constructor(props) {
		super(props);

		// Cancel
		this.options = [I18n.t('Cancel')];
		this.CANCEL_INDEX = 0;

		// Photo
		this.options.push(I18n.t('Take_a_photo'));
		this.PHOTO_INDEX = 1;

		// Library
		this.options.push(I18n.t('Choose_from_library'));
		this.LIBRARY_INDEX = 2;

		setTimeout(() => {
			this.showActionSheet();
		});
	}

	showActionSheet = () => {
		ActionSheet.showActionSheetWithOptions({
			options: this.options,
			cancelButtonIndex: this.CANCEL_INDEX
		}, (actionIndex) => {
			this.handleActionPress(actionIndex);
		});
	}

	handleActionPress = (actionIndex) => {
		const { takePhoto, chooseFromLibrary, hideActions } = this.props;
		switch (actionIndex) {
			case this.PHOTO_INDEX:
				takePhoto();
				break;
			case this.LIBRARY_INDEX:
				chooseFromLibrary();
				break;
			default:
				break;
		}
		hideActions();
	}

	render() {
		return (
			null
		);
	}
}